KMC3PHACVFA [NXP]

AC MOTOR CONTROLLER, PQFP32, 7 X 7 MM, 0.80 MM PITCH, 1.40 MM HEIGHT, PLASTIC, LQFP-32;


型号：	KMC3PHACVFA
厂家：	NXP
描述：	AC MOTOR CONTROLLER, PQFP32, 7 X 7 MM, 0.80 MM PITCH, 1.40 MM HEIGHT, PLASTIC, LQFP-32 电动机控制
文件：	总48页 (文件大小：586K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

Data Sheet

MC3PHAC/D

Rev. 1, 4/2002

3-Phase AC Motor

Controller

Overview

The MC3PHAC is a high-performance monolithic intelligent motor controller

designed specifically to meet the requirements for low-cost, variable-speed,

3-phase ac motor control systems. The device is adaptable and configurable,

based on its environment. It contains all of the active functions required to

implement the control portion of an open loop, 3-phase ac motor drive.

One of the unique aspects of this device is that although it is adaptable and

configurable based on its environment, it does not require any software

development. This makes the MC3PHAC a perfect fit for customer applications

requiring ac motor control but with limited or no software resources available.

The device features are:

•

Volts-per-Hertz speed control

Digital signal processing (DSP) filtering to enhance speed stability

32-bit calculations for high-precision operation

Internet enabled

No user software development required for operation

6-output pulse-width modulator (PWM)

3-phase waveform generation

4-channel analog-to-digital converter (ADC)

User configurable for standalone or hosted operation

Dynamic bus ripple cancellation

Selectable PWM polarity and frequency

Selectable 50/60 Hz base frequency

Phase-lock loop (PLL) based system oscillator

Serial communications interface (SCI)

Low-power supply voltage detection circuit

MC3PHAC/D

Included in the MC3PHAC are protective features consisting of dc bus voltage

monitoring and a system fault input that will immediately disable the PWM

module upon detection of a system fault.

Some target applications for the MC3PHAC include:

•

Low horsepower HVAC motors

Home appliances

Commercial laundry and dishwashers

Process control

Pumps and fans

As shown in Table 1, the MC3PHAC is offered in these packages:

•

Plastic 28-pin dual in-line package (DIP)

Plastic 28-pin small outline integrated circuit (SOIC)

Plastic 32-pin quad flat pack (QFP)

See Figure 1 and Figure 2 for the pin connections.

Table 1. Ordering Information

Operating

Device

Package

Temperature Range

MC3PHACVP

MC3PHACVDW

MC3PHACVFA

–40°C to +105°C

Plastic 28-pin DIP

Plastic 28-pin SOIC

Plastic 32-pin QFP

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Overview

DC_BUS

ACCEL

SPEED

MUX_IN

START

FWD

REF

RESET

V_DDA

SSA

OSC2

OSC1

PLLCAP

V_DD

PWMPOL_BASEFREQ

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

PWM_V_BOT

PWM_W_TOP

PWM_W_BOT

VBOOST_MODE

DT_FAULTOUT

RBRAKE

RETRY_TxD

PWMFREQ_RxD

FAULTIN

Figure 1. Pin Connections for PDIP and SOIC

SPEED

MUX_IN

START

FWD

SSA

OSC2

OSC1

PLLCAP

PWMPOL_BASEFREQ

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

VBOOST_MODE

DT_FAULTOUT

Figure 2. Pin Connections for QFP

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

3-PHASE

AC MOTOR

BUS VOLTAGE

FEEDBACK

RESISTIVE

BRAKE

CONTROL

TO GATE DRIVES

START/STOP

FORWARD/REVERSE

SPEED

PWM’s

ACCELERATION

PWM FREQUENCY

MC3PHAC

PASSIVE

INITIALIZATION

NETWORK

FAULT

SERIAL INTERFACE

(OPTIONAL)

Figure 3. MC3PHAC-Based Motor Control System

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Electrical Characteristics

Maximum Ratings

(1)

Characteristic

Supply voltage

Symbol

Value

–0.3 to +6.0

–0.3 to V +0.3

Unit

Input voltage

Input high voltage

+ 0.3

Maximum current per pin excluding

and V

± 25

Storage temperature

–55 to +150

100

°C

stg

Maximum current out of V

IMV

Maximum current into V

IMV

100

1. Voltages referenced to V

This device contains circuitry to protect the inputs against damage due to high

static voltages or electric fields; however, it is advised that normal precautions

be taken to avoid application of any voltage higher than maximum-rated

voltages to this high-impedance circuit. For proper operation, it is

recommended that V_Inand V_Outbe constrained to the range V_SS≤ (V_Inor V_Out

≤ V_DD. Reliability of operation is enhanced if unused inputs are connected to

an appropriate logic voltage level (for example, either V_SSor V_DD).

)

Functional Operating Range

Characteristic

Symbol

Value

Unit

°C

Operating temperature range

(see Table 1)

–40°C to +105°C

5.0 ± 10%

Operating voltage range

Control Timing

Characteristic

Symbol

Value

Unit

(1)

4.00 ± 1%

MHz

osc

Oscillator frequency

1. Follow the crystal/resonator manufacturer’s recommendations, as the crystal/resonator

parameters determine the external component values required for maximum stability and

reliable starting. The load capacitance values used in the oscillator circuit design should

include all stray capacitances.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

DC Electrical Characteristics

(1)

Characteristic

Symbol

Min

Max

—

Unit

Output high voltage (I

= –2.0 mA)

Load

–0.8

All I/O pins except RBRAKE

Output high voltage RBRAKE (I

= –15.0 mA)

–1.0

—

RBRAKE

OHRB

Output low voltage (I

All I/O pins except FAULTOUT and RETRY/TxD

= 1.6 mA)

Load

—

0.4

Output low voltage (I = 15 mA)

FAULTOUT and RETRY/TxD

Load

—

1.0

OL1

Input high voltage

All ports

0.7 x V

Input low voltage

All ports

0.3 x V

supply current

—

I/O ports high-impedance leakage current

Input current

—

Capacitance

Ports (as input or output)

—

Out

low-voltage inhibit reset

3.80

4.3

150

4.45

—

LVR1

LVH1

low-voltage reset/recovery hysteresis

power-on reset re-arm voltage

power-on reset rise time ramp rate

3.85

POR

0.035

9504

V/ms

Bits/sec

POR

Serial communications interface baud rate

SCI

9696

100

(2)

Voltage Boost

Boost

(3)

Dead time range

31.875

4.55

Range

(4)

Hours

Hz/sec

Retry time

Time

Rate

Acceleration rate

0.5

128

Speed control

SPEED

PWM

128

PWM Frequency

5.291

21.164

101

kHz

FREQ

High side power transistor drive pump-up time

Pump

1. V = 5.0 Vdc ± 10%

2. Limited in standalone mode to 0 to 35%

3. Limited in standalone mode to 0.5 to 6.0 µ

4. Limited in standalone mode to 0 to ~53 seconds

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Pin Descriptions

Table 2 is a pin-by-pin functional description of the MC3PHAC. The pin

numbers in the table refer to the 28-pin packages (see Figure 1).

Table 2. MC3PHAC Pin Descriptions (Sheet 1 of 3)

Number

Pin Name

Pin Function

Reference voltage input for the on-chip ADC. For best signal-to-noise

REF

performance, this pin should be tied to V

(analog).

DDA

A logic 0 on this pin forces the MC3PHAC to its initial startup state. All

PWM outputs are placed in a high-impedance mode. Reset is a

bidirectional pin, allowing a reset of the entire system. It is driven low

when an internal reset source is asserted (for example, loss of clock or

RESET

low V ).

Provides power for the analog portions of the MC3PHAC, which include

the internal clock generation circuit (PLL) and the ADC

DDA

Returns power for the analog portions of the MC3PHAC, which include

the internal clock generation circuit (PLL) and the ADC

SSA

Oscillator output used as part of a crystal or ceramic resonator clock

OSC2

OSC1

(1)

circuit.

Oscillator input used as part of a crystal or ceramic resonator clock

circuit. Can also accept a signal from an external canned oscillator.

(1)

A capacitor from this pin to ground affects the stability and reaction time

of the PLL clock circuit. Smaller values result in faster tracking of the

reference frequency. Larger values result in better stability. A value of

0.1 µF is typical.

PLLCAP

Input which is sampled at specific moments during initialization to

determine the PWM polarity and the base frequency (50 or 60 Hz)

PWMPOL_BASEFREQ

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

PWM_V_BOT

PWM_W_TOP

PWM_W_BOT

PWM output signal for the top transistor driving motor phase U

PWM output signal for the bottom transistor driving motor phase U

PWM output signal for the top transistor driving motor phase V

PWM output signal for the bottom transistor driving motor phase V

PWM output signal for the top transistor driving motor phase W

PWM output signal for the bottom transistor driving motor phase W

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Table 2. MC3PHAC Pin Descriptions (Sheet 2 of 3)

Number

Pin Name

Pin Function

A logic high on this input will immediately disable the PWM outputs. A

retry timeout interval will be initiated once this pin returns to a logic low

state.

FAULTIN

In standalone mode, this pin is an output that drives low to indicate the

parameter mux input pin is reading an analog voltage to specify the

desired PWM frequency. In PC master software mode, this pin is an

input which receives UART serial data.

PWMFREQ_RxD

In standalone mode, this pin is an output that drives low to indicate the

parameter mux input pin is reading an analog voltage to specify the time

to wait after a fault before re-enabling the PWM outputs. In PC master

software mode, this pin is an output that transmits UART serial data.

RETRY_TxD

RBRAKE

Output which is driven to a logic high whenever the voltage on the dc bus

input pin exceeds a preset level, indicating a high bus voltage. This

signal is intended to connect a resistor across the dc bus capacitor to

prevent excess capacitor voltage.

In standalone mode, this pin is an output which drives low to indicate the

parameter mux input pin is reading an analog voltage to specify the

dead-time between the on states of the top and bottom PWM signals for

a given motor phase. In PC master software mode, this pin is an output

which goes low whenever a fault condition occurs.

DT_FAULTOUT

At startup, this input is sampled to determine whether to enter standalone

mode (logic high) or PC master software mode (logic low). In

standalone mode, this pin is also used as an output that drives low to

indicate the parameter mux input pin is reading an analog voltage to

specify the amount of voltage boost to apply to the motor.

VBOOST_MODE

+5-volt digital power supply to the MC3PHAC

Digital power supply ground return for the MC3PHAC

Input which is sampled to determine whether the motor should rotate in

the forward or reverse direction

FWD

Input which is sampled to determine whether the motor should be

running.

START

In standalone mode, during initialization this pin is an output that is used

to determine PWM polarity and base frequency. Otherwise, it is an

analog input used to read several voltage levels that specify MC3PHAC

operating parameters.

MUX_IN

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Pin Descriptions

Table 2. MC3PHAC Pin Descriptions (Sheet 3 of 3)

Pin Name Pin Function

Number

In standalone mode, during initialization this pin is an output that is used

to determine PWM polarity and base frequency. Otherwise, it is an

analog input used to read a voltage level corresponding to the desired

steady-state speed of the motor.

SPEED

ACCEL

In standalone mode, during initialization this pin is an output that is used

to determine PWM polarity and base frequency. Otherwise, it is an

analog input used to read a voltage level corresponding to the desired

acceleration of the motor.

In standalone mode, during initialization this pin is an output that is used

to determine PWM polarity and base frequency. Otherwise, it is an

analog input used to read a voltage level proportional to the dc bus

voltage.

DC_BUS

1. Correct timing of the MC3PHAC is based on a 4.00 MHz crystal or ceramic resonator. Follow the crystal/resonator

manufacturer’s recommendations, as the crystal/resonator parameters determine the external component values required

for maximum stability and reliable starting. The load capacitance values used in the oscillator circuit design should include

all stray capacitances.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Introduction

The MC3PHAC is a high-performance intelligent controller designed

specifically to meet the requirements for low-cost, variable-speed,

3-phase ac motor control systems. The device is adaptable and configurable,

based on its environment. Constructed with high-speed CMOS

(complementary metal-oxide semiconductor) technology, the MC3PHAC offers

a high degree of performance and ruggedness in the hostile environments

often found in motor control systems.

The device consists of:

•

6-output pulse-width modulator (PWM)

4-channel analog-to-digital converter (ADC)

Phase-lock loop (PLL) based system oscillator

Low-power supply voltage detection circuit

Serial communications interface (SCI)

The serial communications interface is used in a mode, called PC master

software mode, whereby control of the MC3PHAC is from a host or master

personal computer executing PC master software or a microcontroller

emulating PC master software commands. In either case, control via the

internet is feasible.

Included in the MC3PHAC are protective features consisting of dc bus

monitoring and a system fault input that will immediately disable the PWM

module upon detection of a system fault.

Included motor control features include:

•

Open loop volts/Hertz speed control

Forward or reverse rotation

Start/stop motion

System fault input

Low-speed voltage boost

Internal power-on reset (POR)

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Features

3-Phase Waveform Generation — The MC3PHAC generates six PWM

signals which have been modulated with variable voltage and variable

frequency information in order to control a 3-phase ac motor. A third harmonic

signal has been superimposed on top of the fundamental motor frequency to

achieve full bus voltage utilization. This results in a 15 percent increase in

maximum output amplitude compared to pure sine wave modulation.

The waveform is updated at a 5.3 kHz rate (except when the PWM frequency

is 15.9 kHz), resulting in near continuous waveform quality. At 15.9 kHz, the

waveform is updated at 4.0 kHz.

DSP Filtering — A 24-bit IIR digital filter is used on the SPEED input signal in

standalone mode, resulting in enhanced speed stability in noisy environments.

The sampling period of the filter is 3 ms (except when the PWM frequency is

15.9 kHz) and it mimics the response of a single pole analog filter having a pole

at 0.4 Hz. At a PWM frequency of 15.9 kHz, the sampling period is 4 ms and

the pole is located at 0.3 Hz.

High Precision Calculations — Up to 32-bit variable resolution is employed

for precision control and smooth performance. For example, the motor speed

can be controlled with a resolution of 4 mHz.

Smooth Voltage Transitions — When the commanded speed of the motor

passes through ±1 Hz, the voltage is gently applied or removed depending on

the direction of the speed change. This eliminates any pops or surges that may

occur, especially under conditions of high-voltage boost at low frequencies.

High-Side Bootstrapping — Many motor drive topologies (especially high-

voltage drives) use optocouplers to supply the PWM signal to the high-side

transistors. Often, the high-side transistor drive circuitry contains a charge

pump circuit to create a floating power supply for each high-side transistor that

is dependent on low-side PWMs to develop power. When the motor has been

off for a period of time, the charge on the high-side power supply capacitor is

depleted and must be replenished before proper PWM operation can resume.

To accommodate such topologies, the MC3PHAC will always provide 100 ms

of 50 percent PWM drive to only the low-side transistors each time the motor is

turned on. Since the top transistors remain off during this time, it has the effect

of applying zero volts to the motor, and no motion occurs. After this period,

motor waveform modulation begins, with PWM drive also being applied to the

high-side transistors.

Fast Velocity Updating — During periods when the motor speed is changing,

the rate at which the velocity is updated is critical to smooth operation. If these

updates occur too infrequently, a ratcheting effect will be exhibited on the

motor, which inhibits smooth torque performance. However, velocity profiling is

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

a very calculation intensive operation to perform, which runs contrary to the

previous requirement.

In the MC3PHAC, a velocity pipelining technique is employed which allows

linear interpolation of the velocity values, resulting in a new velocity value every

189 µs (252 µs for 15.9 kHz PWMs). The net result is ultra smooth velocity

transitions, where each velocity step is not perceivable by the motor.

Dynamic Bus Ripple Cancellation — The dc bus voltage is sensed by the

MC3PHAC, and any deviations from a predetermined norm (3.5 V on the

dc bus input pin) result in corrections to the PWM values to counteract the

effect of the bus voltage changes on the motor current. The frequency of this

calculation is sufficiently high to permit compensation for line frequency ripple,

as well as slower bus voltage changes resulting from regeneration or brown out

conditions. See Figure 4.

MOTOR PHASE CURRENT WAVEFORMS

REMOVES 60 Hz HUM

COMPENSATED

AND DECREASES I R LOSSES

UNCOMPENSATED

PWM1

PWM2

PWM3

PWM4

PWM5

PWM6

CORRECTED PWMs

MC3PHAC

Figure 4. Dynamic Bus Ripple Cancellation

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Features

Selectable Base Frequency — Alternating current (ac) motors are designed

to accept rated voltage at either 50 or 60 Hz, depending on what region of the

world they were designed to be used. The MC3PHAC can accommodate both

types of motors by allowing the voltage profile to reach maximum value at either

50 or 60 Hz. This parameter can be specified at initialization in standalone

mode, or it can be changed at any time in PC master software mode.

Selectable PWM Polarity — The polarity of the PWM outputs may be specified

such that a logic high on a PWM output can either be the asserted or negated

state of the signal. In standalone mode, this parameter is specified at

initialization and applies to all six PWM outputs. In PC master software mode,

the polarity of the top PWM signals can be specified separately from the polarity

of the bottom PWM signals.

This specification can be done at any time, but once it is done, the polarities are

locked and cannot be changed until a reset occurs. Also, any commands from

PC master software that would have the effect of enabling PWMs are

prevented by the MC3PHAC until the polarity has been specified.

In standalone mode, the base frequency and PWM polarity are specified at the

same time during initialization by connecting either pin 25, 26, 27, or 28

exclusively to the PWMPOL_BASEFREQ input. During initialization, pins 25,

26, 27, and 28 are cycled one at a time to determine which one has been

connected to the PWMPOL_BASEFREQ input.

Table 3 shows the selected PWM polarity and base frequency as a function of

which pin connection is made. Refer to the standalone mode schematic,

Figure 8. Only one of these jumpers (JP1–JP4) can be connected at any one

time.

NOTE:

It is not necessary to break this connection once the initialization phase has

been completed. The MC3PHAC will function properly while this connection is

in place.

Table 3. PWM Polarity and Base Frequency

Specification in Standalone Mode

Pin Connected to

PWMPOL_BASEFREQ Pin

Base

Frequency

PWM Polarity

MUX_IN (JP1)

SPEED (JP2)

ACCEL (JP3)

DC_BUS (JP4)

Logic low = on

Logic high = on

Logic low = on

Logic high = on

50 Hz

60 Hz

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Selectable PWM Frequency — The MC3PHAC accommodates four discrete

PWM frequencies and can be changed dynamically while the motor is running.

This resistor can be a potentiometer or a fixed resistor in the range shown in

Table 4. In standalone mode, the PWM frequency is specified by applying a

voltage to the MUX_IN pin while the PWMFREQ_RxD pin is being driven low.

Table 4 shows the required voltage levels on the MUX_IN pin and the

associated PWM frequency for each voltage range.

NOTE:

The PWM frequencies are based on a 4.00 MHz frequency applied to the

oscillator input.

Table 4. MUX_IN Resistance Ranges

and Corresponding PWM Frequencies

Voltage Input

0 to 1 V

PWM Frequency

5.291 kHz

1.5 to 2.25 V

2.75 to 3.5 V

4 to 5 V

10.582 kHz

15.873 kHz

21.164 kHz

Selectable PWM Dead Time — Besides being able to specify the PWM

frequency, the blanking time interval between the on states of the

complementary PWM pairs can also be specified. Refer to the graph in

Figure 9 for the resistance value versus dead time. Figure 9 assumes a

6.8 kΩ ±5% pullup resistor. In standalone mode, this is done by

supplying a voltage to the MUX_IN pin while the DT_FAULTOUT pin is being

driven low. In this way, dead time can be specified with a scaling factor of

2.075 µs per volt, with a minimum value of 0.5 µs. In PC master software mode,

this value can be selected to be anywhere between 0 and 32 µs.

In both standalone and PC master software modes, the dead time value can be

written only once. Further updates of this parameter are locked out until a reset

condition occurs.

Speed Control — The synchronous motor frequency can be specified in real

time to be any value from 1 Hz to 128 Hz by the voltage applied to the SPEED

pin. The scaling factor is 25.6 Hz per volt. This parameter can also be controlled

directly from PC master software in real time.

The SPEED pin is processed by a 24-bit digital filter to enhance the speed

stability in noisy environments. This filter is only activated in standalone mode.

Acceleration Control — Motor acceleration can be specified in real time to be

in the range from 0.5 Hz/second, ranging to 128 Hz/second, by the voltage

applied to the ACCEL pin. The scaling factor is 25.6 Hz/second per volt. This

parameter can also be controlled directly from PC master software in real time.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Features

Voltage Profile Generation — The MC3PHAC controls the motor voltage in

proportion to the specified frequency, as indicated in Figure 5.

100%

VOLTAGE BOOST

FREQUENCY

BASE FREQUENCY

Figure 5. Voltage Profiling, Including Voltage Boost

An ac motor is designed to draw a specified amount of magnetizing current

when supplied with rated voltage at the base frequency. As the frequency

decreases, assuming no stator losses, the voltage must decrease in exact

proportion to maintain the required magnetizing current. In reality, as the

frequency decreases, the voltage drop in the series stator resistance increases

in proportion to the voltage across the magnetizing inductance. This has the

effect of further reducing the voltage across the magnetizing inductor, and

consequently, the magnetizing current. A schematic representation of this

effect is illustrated in Figure 6. To compensate for this voltage loss, the voltage

profile is boosted over the normal voltage curve in Figure 5, so that the

magnetizing current remains constant over the speed range.

PARASITICS

R₁

R₂

MAGNETIZING CURRENT

(TRY TO KEEP CONSTANT)

R2 (1 –s)

X_M

TORQUE CURRENT

Figure 6. AC Motor Single Phase Model

Showing Parasitic Stator Impedances

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

The MC3PHAC allows the voltage boost to be specified as a percentage of full

voltage at 0 Hz, as shown in Figure 5. In standalone mode, voltage boost is

specified during the initialization phase by supplying a voltage to the MUX_IN

pin while the VBOOST_MODE pin is being driven low. Refer to the graph in

Figure 11 for the resistance value versus voltage boost. Figure 11 assumes a

6.8 kΩ pullup resistor. In this way, voltage boost can be specified from 0 to 40

percent, with a scaling factor of 8 percent per volt. In PC master software mode,

the voltage boost can be specified from 0 to 100 percent and can be changed

at anytime.

By using the voltage boost value, and the specified base frequency, the

MC3PHAC has all the information required to generate a voltage profile

automatically based on the generated waveform frequency. An additional

feature exists in PC master software mode whereby this voltage value can be

overridden and controlled in real time. Specifying a voltage lower than the

normal volts-per-hertz profile permits a softer torque response in certain

ergonomic situations. It also allows for load power factor control and higher

operating efficiencies with high inertia loads or other loads where

instantaneous changes in torque demand are not permitted. Details of this

feature are discussed in the PC Master Software Operation with the

MC3PHAC.

PLL Clock Generation — The OSC1 pin signal is used as a reference clock

for an internal PLL clocking circuit, which is used to drive the internal clocks of

the MC3PHAC. This provides excellent protection against noise spikes that

may occur on the OSC1 pin. In a clocking circuit that does not incorporate a

PLL, a noise spike on the clock input can create a clock edge, which violates

the setup times of the clocking logic, and can cause the device to malfunction.

The same noise spike applied to the input of a PLL clock circuit is perceived by

the PLL as a change in its reference frequency, and the PLL output frequency

begins to change in an attempt to lock on to the new frequency. However,

before any appreciable change can occur, the spike is gone, and the PLL

settles back into the true reference frequency.

Fault Protection — The MC3PHAC supports an elaborate range of fault

protection and prevention features. If a fault does occur, the MC3PHAC

immediately disables the PWMs and waits until the fault condition is cleared

before starting a timer to re-enable the PWMs. Refer to the graph in Figure 10

for the resistance value versus retry time. Figure 10 assumes a 6.8 kΩ pullup

resistor. In standalone mode, this timeout interval is specified during the

initialization phase by supplying a voltage to the MUX_IN pin while the

RETRY_TxD pin is being driven low. In this way, the retry time can be specified

from 1 to 60 seconds, with a scaling factor of 12 seconds per volt. In PC master

software mode, the retry time can be specified from 0.25 second to over

4.5 hours and can be changed at any time.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Features

The fault protection and prevention features are:

•

External Fault Monitoring — The FAULTIN pin accepts a digital signal

that indicates a fault has been detected via external monitoring circuitry.

A high level on this input results in the PWMs being immediately

disabled. Typical fault conditions might be a dc bus over voltage, bus

over current, or over temperature. Once this input returns to a logic low

level, the fault retry timer begins running, and PWMs are re-enabled

after the programmed timeout value is reached.

•

Lost Clock Protection — If the signal on the OSC1 pin is lost

altogether, the MC3PHAC will immediately disable the PWM outputs to

protect the motor and power electronics. This is a special fault condition

in that it will also cause the MC3PHAC to be reset. Lost clock detection

is an important safety consideration, as many safety regulatory agencies

are now requiring a dead crystal test be performed as part of the

certification process.

•

Low V_DDProtection — Whenever V_DDfalls below V_LVR1, an on-board

power supply monitor will reset the MC3PHAC. This allows the

MC3PHAC to operate properly with 5 volt power supplies of either 5 or

10 percent tolerance.

Bus Voltage Integrity Monitoring — The DC_BUS pin is monitored at

a 5.3 kHz frequency (4.0 kHz when the PWM frequency is set to

15.9 kHz), and any voltage reading outside of an acceptable window

constitutes a fault condition. In standalone mode, the window thresholds

are fixed at 4.47 volts (128 percent of nominal), and 1.75 volts

(50 percent of nominal), where nominal is defined to be 3.5 volts. In PC

master software mode, both top and bottom window thresholds can be

set independently to any value between 0 volts (0 percent of nominal),

and greater than 5 volts (143 percent of nominal), and can be changed

at any time. Once the DC_BUS signal level returns to a value within the

acceptable window, the fault retry timer begins running, and PWMs are

re-enabled after the programmed timeout value is reached.

During power-up, it is possible that V_DDcould reach operating voltage

before the dc bus capacitor charges up to its nominal value. When the

dc bus integrity is checked, an under voltage would be detected and

treated as a fault, with its associated timeout period. To prevent this, the

MC3PHAC monitors the dc bus voltage during power-up in standalone

mode, and waits until it is higher than the under voltage threshold before

continuing. During this time, all MC3PHAC functions are suspended.

Once this threshold is reached, the MC3PHAC will continue normally,

with any further under voltage conditions treated as a fault.

If dc bus voltage monitoring is not desired, a voltage of

3.5 volts ± 5 percent should be supplied to the DC_BUS pin through an

impedance of between 4.7 kΩ and 15 kΩ.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

•

Regeneration Control — Regeneration is a process by which stored

mechanical energy in the motor and load is transferred back into the

drive electronics, usually as a result of an aggressive deceleration

operation. In special cases where this process occurs frequently (for

example, elevator motor control systems), it is economical to incorporate

special features in the motor drive to allow this energy to be supplied

back to the ac mains. However, for most low cost ac drives, this energy

is stored in the dc bus capacitor by increasing its voltage. If this process

is left unchecked, the dc bus voltage can rise to dangerous levels, which

can destroy the bus capacitor or the transistors in the power inverter.

The MC3PHAC incorporates two techniques to deal with regeneration

before it becomes a problem:

–

Resistive Braking — The DC_BUS pin is monitored at a

5.3 kHz frequency (4.0 kHz when the PWM frequency is set to

15.9 kHz), and when the voltage reaches a certain threshold, the

RBRAKE pin is driven high. This signal can be used to control a

resistive brake placed across the dc bus capacitor, such that

mechanical energy from the motor will be dissipated as heat in the

resistor versus being stored as voltage on the capacitor. In

standalone mode, the DC_BUS threshold required to assert the

RBRAKE signal is fixed at 3.85 volts (110 percent of nominal) where

nominal is defined to be 3.5 volts. In PC master software mode, this

threshold can be set to any value between 0 volts (0 percent of

nominal) and greater than 5 volts (143 percent of nominal) and can

be changed at any time.

–

Automatic Deceleration Control — When decelerating the motor, the

MC3PHAC attempts to use the specified acceleration value for

deceleration as well. If the voltage on the DC_BUS pin reaches a

certain threshold, the MC3PHAC begins to moderate the

deceleration as a function of this voltage, as shown in Figure 7. The

voltage range on the DC_BUS pin from when the deceleration

begins to decrease, to when it reaches 0, is 0.62 volts. In standalone

mode, the DC_BUS voltage where deceleration begins to decrease

is fixed at 3.85 volts (110 percent of nominal) where nominal is

defined to be 3.5 volts. In PC master software mode, this threshold

can be set to any value between 0 volts (0 percent of nominal) and

greater than 5 volts (143 percent of nominal) and can be changed at

any time.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Digital Power Supply Bypassing

ACCELERATION INPUT

BUS VOLTAGE

BEGIN MODERATING DECEL

(LEVEL IS PROGRAMMABLE

IN PC MASTER SOFTWARE MODE)

Figure 7. Deceleration as a Function of Bus Voltage

Digital Power Supply Bypassing

V_DDand V_SSare the digital power supply and ground pins for the MC3PHAC.

Fast signal transitions connected internally on these pins place high, short-

duration current demands on the power supply. To prevent noise problems,

take special care to provide power supply bypassing at the V_DDand V_SSpins.

Place the bypass capacitors as close as possible to the MC3PHAC. Use a high-

frequency-response ceramic capacitor, such as a 0.1 µF, paralleled with a bulk

capacitor in the range of 1 µF to 10 µF for bypassing the digital power supply.

Analog Power Supply Bypassing

V_DDAand V_SSAare the power supply pins for the analog portion of the clock

generator and analog-to-digital converter (ADC). On the schematics in this

document, analog ground is labeled with an A and other grounds are digital

grounds. Analog power is labeled as +5 A. It is good practice to isolate the

analog and digital +5 volt power supplies by using a small inductor or a low

value resistor less than 5 ohms in series with the digital power supply, to create

the +5 A supply. ADC V_REFis the power supply pin used for setting the ADC’s

voltage reference.

Decoupling of these pins should be per the digital power supply bypassing,

described previously. ADC V_REF(pin 1) and V_DDA(pin 3) shall be connected

together and connected to the same potential as V_DD

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Grounding Considerations

Printed circuit board layout is an important design consideration. In particular,

ground planes and how grounds are tied together influence noise immunity. To

maximize noise immunity, it is important to get a good ground plane under the

MC3PHAC. It is also important to separate analog and digital grounds. That is

why, shown on the schematics, there are two ground designations, analog

ground is marked with an A and other grounds are digital grounds. GND is the

digital ground plane and power supply return. GNDA is the analog circuit

ground. They are both the same reference voltage, but are routed separately,

and tie together at only one point.

Power-Up/Power-Down

When power is applied or removed, it is important that the inverter’s top and

bottom output transistors in the same phase are not turned on simultaneously.

Since logic states are not always defined during power-up, it is important to

ensure that all power transistors remain off when the controller’s supply voltage

is below its normal operating level. The MC3PHAC’s PWM module outputs

make this easy by switching to a high impedance configuration whenever the

5-volt supply is below its specified minimum.

The user should use pullup or pulldown resistors on the output of the

MC3PHAC’s PWM outputs to ensure during power-up and power-down, that

the inverter’s drive inputs are at a known, turned off, state.

Operation

The MC3PHAC motor controller will operate in two modes. The first is

standalone operation, whereby the MC3PHAC can be used without any

intervention from an external personal computer. In standalone mode, the

MC3PHAC is initialized by passive devices connected to the MC3PHAC and

input to the system at power-up/reset time. In standalone mode, some

parameters continue to be input to the system as it operates. Speed, PWM

frequency, bus voltage, and acceleration parameters are input to the system on

a real-time basis.

The second mode of operation is called PC master software mode.That

operational mode requires the use of a personal computer and PC master

software executing on the personal computer, communicating with the

MC3PHAC, or a microcontroller emulating PC master software commands.

All command and setup information is input to the MC3PHAC via the PC host.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

Standalone Operation

If the VBOOST_MODE pin is high when the MC3PHAC is powered up, or after

a reset, the MC3PHAC enters standalone mode. In this mode of operation, the

functionality of many of the MC3PHAC pins change so that the device can

control a motor without requiring setup information from an external master.

When operated in standalone mode, the MC3PHAC will drive certain pins

corresponding to parameters which must be specified, while simultaneously

monitoring the response on other pins.

In many cases, the parameter to be specified is represented as an analog

voltage presented to the MUX_IN pin, while certain other pins are driven low.

In so doing, the MC3PHAC can accommodate an external analog mux which

will switch various signals on the MUX_IN pin when the signal select line goes

low. All signals must be in a range between 0 V and V_REF. As an economical

alternative, an external passive network can be connected to each of the

parameter select output pins and the MUX_IN pin, as shown in Figure 8.

The Thevenin equivalent impedance of this passive network as seen by the

MUX_IN pin is very important and should be in the range of 5 kΩ to 10 kΩ. If

the resistance is too high, leakage current from the input/output (I/O) pins will

cause an offset voltage that will affect the accuracy of the reading. If the

resistance is too low, the parameter select pins will not be able to sink the

required current for an accurate reading. Using a pullup resistor value of 6.8 kΩ

(as indicated in Figure 8), the resulting value for each parameter as a function

of the corresponding pulldown resistor value is shown in Figure 9, Figure 10,

Figure 11, and Table 4.

The START input pin is debounced internally and a switch can be directly

accommodated on this pin. The input is level sensitive, but a logic 1 level must

exist on the pin before a logic 0 level will be processed as a start signal. This

will prevent an accidental motor startup in the event of the MC3PHAC being

powered up, where the switch was left in the start position.

The FWD input pin is debounced internally and can directly accommodate a

switch connection. The input is also level sensitive.

Figure 8 shows the jumper arrangement connected to the

PWMPOL_BASEFREQ input pin. For proper operation, one and only one

jumper connection can be made at any given time. Table 3 shows the polarity

and base frequency selections as a function of the jumper connection.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

+5 V

6.8 kΩ

NOTE 6

50 Hz – PWM POLARITY

50 Hz + PWM POLARITY

60 Hz – PWM POLARITY

60 Hz + PWM POLARITY

JP1

JP2

JP3

JP4

+5 V

FROM DIVIDED DC BUS

+5 A

5 kΩ

10 kΩ

NOTE 7

+5 A

4.7 kΩ

MC3PHAC

RESET

0.1 µF

DC_BUS

REF

+5 A

5 kΩ

ACCEL

RESET

+5 V

SPEED

DDA

10 kΩ

MUX_IN

SSA

OSC2

OSC1

START

10 MΩ

22 pF

FWD

0.1 µF

PLLCAP

10 kΩ

NOTE 7

+ 5

NOTE 8

+ 5

PWMPOL_BASEFREQ

RBOOST

NOTE 1

NOTE 2

VBOOST_MODE

DT_FAULTOUT

RBRAKE

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

PWM_V_BOT

RDEADTIME

TO RESISTIVE BRAKE DRIVER

RRETRY

NOTE 3

NOTE 4

RETRY/TxD

RPWMFREQ

PWMFREQ/RxD

FAULTIN

PWM_W_TOP

PWM_W_BOT

NOTE 5

FROM SYSTEM FAULT

DETECTION CIRCUIT

Notes:

1. See Figure 11.

2. See Figure 9.

3. See Figure 10.

4. See Table 4.

5. If no external fault circuit is provided, connect to V

6. Connect only one jumper.

7. Use bypass capacitors placed close to the MC3PHAC.

8. Consult crystal/resonator manufacturer for component values.

Figure 8. Standalone MC3PHAC Configuration

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

DEAD TIME (µs)

6.0

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

RESISTANCE (kΩ)

Figure 9. Dead Time as a Function of the RDEADTIME Resistor

RETRY TIME (SECONDS)

15 20 25 30 35 40 45 50

RESISTANCE (kΩ)

Figure 10. Fault Retry Time as a Function of the RRETRY Resistor

VBOOST (%)

15 20 25 30 35 40 45 50

RESISTANCE (kΩ)

Figure 11. Voltage Boost as a Function of the RBOOST Resistor

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Standalone Application Example

Figure 12 shows an application example of the MC3PHAC, configured in

standalone mode. Resistor values and jumpers have been selected to provide

the following performance:

1. Base frequency of 60 Hz and positive PWM polarity (from Table 3)

2. PWM frequency resistor 3.9 kΩ, which implies 10.582 kHz from

Table 4). (5v/(3.9k + 6.8k))*3.9k = 1.82 volts

3. Dead-time resistor = 5.1 kΩ, which implies 4.5 µs (from Figure 9)

4. Fault retry time resistor = 8.2 kΩ, which implies 32.8 seconds (from

Figure 10).

5. Voltage boost resistor = 12 kΩ, which implies 25.5 percent (from

Figure 11).

6. The wiper of the acceleration potentiometer is set at

2.5 V = 64 Hz/second acceleration rate (from the Acceleration Control

description on page 14.) The potentiometer, in this case, could have

been a resistor divider. If a resistor divider is used in place of the

acceleration potentiometer, keep the total resistance of the two resistors

less than 10 kΩ. Always use 4.7kΩ in series with the center of the

acceleration voltage divider resistors, connected to the ACCEL (pin 27)

as shown in the application example, Figure 12.

7. Crystal/resonator capacitor values are typical values from the

manufacturer. Refer to the manufacturers data for actual values.

PC Master Software Operation

Introduction to PC Master Host Software

The MC3PHAC is compatible with Motorola’s PC master host software serial

interface protocol. Communication occurs over an on-chip UART, on the

MC3PHAC at 9600 baud to an external master device, which may be a

microcontroller that also has an integrated UART or a personal computer via a

COM port. With PC master software, an external controller can monitor and

control all aspects of the MC3PHAC operation.

When the MC3PHAC is placed in PC master software mode, all control of the

system is provided through the integrated UART, resident on the MC3PHAC.

Inputs such as START, FWD, SPEED, ACCEL, MUX_IN, and

PWMPOL_BASEFREQ have no controlling influence over operation of the

system. Even though the SPEED, START, and FWD inputs are disabled while

the system is in PC master software mode, through PC master software, it is

possible to monitor the state of those inputs.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

+5 V

6.8 kΩ

50 Hz – PWM POLARITY

50 Hz + PWM POLARITY

60 Hz – PWM POLARITY

60 Hz + PWM POLARITY

+5 V

FROM DIVIDED DC BUS

+5 A

5 kΩ

10 kΩ

NOTE 6

+5 A

4.7 kΩ

MC3PHAC

RESET

0.1 µF

DC_BUS

REF

+5 A

5 kΩ

ACCEL

RESET

+5 V

SPEED

DDA

10 kΩ

MUX_IN

SSA

OSC2

OSC1

START

10 MΩ

22 pF

FWD

0.1 µF

PLLCAP

10 kΩ

NOTE 6

+ 5

NOTE 7

+ 5

PWMPOL_BASEFREQ

RBOOST

NOTE 1

NOTE 2

12 kΩ

VBOOST_MODE

DT_FAULTOUT

RBRAKE

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

PWM_V_BOT

RDEADTIME

5.1 kΩ

TO RESISTIVE BRAKE DRIVER

RRETRY

NOTE 3

NOTE 4

17 8.2 kΩ

RETRY/TxD

RPWMFREQ

PWMFREQ/RxD

FAULTIN

PWM_W_TOP

PWM_W_BOT

3.9 kΩ

NOTE 5

FROM SYSTEM FAULT

DETECTION CIRCUIT

Notes:

1. See Figure 11.

2. See Figure 9.

3. See Figure 10.

4. See Table 4.

5. If no external fault circuit is provided, connect to V

6. Use bypass capacitors placed close to the MC3PHAC.

7. Consult crystal/resonator manufacturer for component values.

Figure 12. MC3PHAC Application Example in Standalone Mode

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

The most popular master implementation is a PC, where a graphical user

interface (GUI) has been layered on top of the PC master software command

protocol, complete with a graphical data display, and an ActiveX interface.

Figure 13 shows the MC3PHAC configured in PC master software mode. It is

beyond the scope of this document to describe the PC master software protocol

or its implementation on a personal computer. For further information on these

topics, refer to other Motorola documents relating to the PC master software

protocol and availability of PC master host software.

+5 V

10 kΩ

NOTE 2

+5 A

MC3PHAC

DC_BUS

FROM DIVIDED DC BUS

+5 V

V_REF

RESET

0.1 µF

ACCEL

SPEED

MUX_IN

RESET

V_DDA

10 kΩ

SSA

10 MΩ

22 pF

560 Ω

OSC2

OSC1

START

FWD

0.1 µF

NOTE 3

+5 V

PLLCAP

FAULT LED

NOTE 2

+ 5

PWMPOL_BASEFREQ

10 kΩ

VBOOST_MODE

DT_FAULTOUT

RBRAKE

PWM_U_TOP

PWM_U_BOT

PWM_V_TOP

PWM_V_BOT

TO RESISTIVE BRAKE DRIVER

17 DATA TO PC

ISOLATED

OR NON-ISOLATED

RS232 INTERFACE

RETRY/TxD

CONNECTION

TO HOST

DATA FROM PC

NOTE 1

PWMFREQ/RxD

FAULTIN

PWM_W_TOP

PWM_W_BOT

FROM SYSTEM FAULT

DETECTION CIRCUIT

Notes:

1. If no external fault circuit is provided, connect to V

2. Use bypass capacitors placed close to the MC3PHAC.

3. Consult crystal/resonator manufacturer for component values.

Figure 13. MC3PHAC Configuration for Using a PC as a Master

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

PC Master Software Operation with the MC3PHAC

When power is first applied to the MC3PHAC, or if a logic low level is applied

to the RESET pin, the MC3PHAC enters PC master software mode if the

VBOOST_MODE pin is low during the initialization phase. The MC3PHAC

recognizes a subset of the PC master software command set, which is listed in

Table 5.

Table 5. Recognized PC Host Software Commands

Command

Description

MC3PHAC responds with brief summary of hardware setup

and link configuration information

GETINFOBRIEF

MC3PHAC reads an 8-bit variable at a specified address

and responds with its value

READVAR8

READVAR16

READVAR32

MC3PHAC reads a 16-bit variable at a specified address

and responds with its value

MC3PHAC reads a 32-bit variable at a specified address

and responds with its value

WRITEVAR8

WRITEVAR16

MC3PHAC writes an 8-bit variable at a specified address

MC3PHAC writes a 16-bit variable at a specified address

With the READVARx commands, the addresses are checked for validity, and

the command is executed only if the address is within proper limits. In general,

a read command with an address value below $0060 or above $EE03 will not

execute properly, but instead will return an invalid operation response. An

exception to this rule is that PC master software allows reading locations

$0001, $0036 and $FE01, which are PORTB data register, Dead Time register

and SIM Reset Status registers respectively. The addresses for the

WRITEVARx commands are checked for validity, and the data field is also

limited to a valid range for each variable. See Table 6 for a list of valid data

values and valid write addresses.

User interface variables and their associated PC master software addresses

within the MC3PHAC are listed in Table 6.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Table 6. User Interface Variables for Use with PC Master Software

Read/

Write (Bytes)

Size

Name

Address

$1000

Description

Valid Data

Forward — $10

Reverse — $11

Stop — $20

Determines whether the motor should

go forward, reverse, or stop

Commanded direction

Command reset

Forces the MC3PHAC to perform an

immediate reset

$1000

$30

5.3 kHz — $41

10.6 kHz — $42

15.9 kHz — $44

21.1 kHz — $48

Commanded PWM

frequency

Specifies the frequency of the

MC3PHAC PWM frequency

$1000

$00A8

(1)

The modulus value supplied to the

PWM generator used by the

MC3PHAC — value is multiplied by

250 ns to obtain PWM period

Measured PWM

period

$00BD–$05E8

Specifies the polarity of the MC3PHAC

PWM outputs. This is a write once

parameter after reset.

Example: $50 = Bottom and top PWM

outputs are positive polarity.

B + T + $50

B + T – $54

B – T + $58

B – T – $5C

Commanded PWM

polarity

$1000

$0036

(2), (3), (4)

Specifies the dead time used by the

PWM generator.

Dead time = Value * 125 ns.

This is a write-once parameter.

(2), (3), (4)

Dead time

R/W

$00–$FF

Specifies the motor frequency at which

full voltage is applied

60 Hz — $60

50 Hz — $61

(3)

Base frequency

$1000

$0060

$0062

(3)

(8)

Acceleration

R/W

Acceleration in Hz/sec (7.9 format)

$0000–$7FFF

Commanded motor

Commanded frequency in Hz.

(3)

(9)

frequency

(8.8 format)

(9)

Actual frequency

$0085

$00C8

Actual frequency in Hz. (8.8 format)

$0000–$7FFF

$00–$FF

(7)

Status

Status byte

0 Hz voltage.

%Voltage boost = Value/$FF

Voltage boost

$006C

R/W

$00–$FF

Voltage level (motor waveform

amplitude percent assuming no bus

ripple compensation)

Modulation index

$0091

$00–$FF

Modulation index = value/$FF

Maximum allowable modulation index

value

%Maximum voltage = value/$FF

Maximum voltage

$0075

$0079

R/W

$00–$FF

(5), (10)

voltage

DC bus voltage reading

$000–$3FF

Bus

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

Table 6. User Interface Variables for Use with PC Master Software (Continued)

Read/

Write (Bytes)

Size

Name

Fault timeout

Fault timer

Address

Description

Valid Data

Specifies the delay time after a fault

condition before re-enabling the

motor.

$006A

R/W

$0000–$FFFF

Fault timeout = value * 0.262 sec

Real-time display of the fault timer

Elapsed fault time = value * 0.262 sec

$006D

$00C9

$0064

$0066

$0068

$0095

$0000–$FFFF

$0000–$03FF

$0000–$FFC0

readings above this value result

(10)

Bus

decel value

R/W

Bus

in reduced deceleration.

readings above this value result

Bus

in the RBRAKE pin being asserted.

readings below this value result in

Bus

an under voltage fault.

readings above this value result

Bus

value

RBRAKE

Bus

(10)

brownout

value

Bus

(10)

over voltage

Bus

(10)

value

in an over voltage fault.

Speed in ADC

Left justified 10-bit ADC reading of the

SPEED input pin.

(5)

value

Bit field indicating which setup

parameters have been initialized

before motion is permitted

(7)

Setup

$00AE

$0001

$E0–$FF

$00–$FF

Bit field indicating the current state of

the start/stop and forward/reverse

switches

(7)

Switch in

(6), (7)

Reset status

Version

$FE01

$EE00

Indicates cause of the last reset

MC3PHAC version

$00–$FF

ASCII field

1. The commanded PWM frequency cannot be written until the PWM outputs exit the high-impedance state. The default PWM

frequency is 15.873 kHz.

2. The PWM output pins remain in a high-impedance state until this parameter is specified.

3. This parameter must be specified before motor motion can be initiated by the MC3PHAC.

4. This is a write-once parameter. The first write to this address will execute normally. Further attempts at writing this

parameter will result in an illegal operation response from the MC3PHAC.

5. The value of this parameter is not valid until the PWM outputs exit the high-impedance state.

6. The data in this field is only valid for one read. Further reads will return a value of $00.

7. See register bit descriptions following this table.

8. Acceleration is an unsigned value with the upper seven bits range of $00 to $7F = acceleration value of 0 to

127 Hertz/second. The lower nine bits constitute the fractional portion of the acceleration parameter. Its range is $000 to

$1FF which equals 0 to ~1. Therefore, the range of acceleration is 0 to 127.99 Hertz/second.

9. Commanded motor frequency and actual frequency are signed values with the upper byte range of

$00 to $7F = frequency of 0 to 127 Hz. The lower byte is the fractional portion of the frequency. Its range is $00 to $FF

which equals 0 to ~1.

10. V

is the voltage value applied to the DC_BUS analog input pin. The analog-to-digital converter is a 10-bit converter with

Bus

a 5 volt full scale input. The value is equal to the voltage applied to the DC_BUS input pin/V

* $03FF.

REF

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Each bit variable listed in Table 6 is defined in Figure 14, Figure 15,

Figure 16, and Figure 17.

Address:

$00C8

Bit 7

Bit 0

EXTERNAL

FAULT

OVER-

VOLTAGE VOLTAGE

TRIP

UNDER

SPEED

FORWARD

MOTOR

RESISTIVE

Read:

CHANGING MOTION ENERGIZED BRAKE

TRIP

Write:

Reset:

= Unimplemented

U = Unaffected

Figure 14. Status Register

SPEED CHANGING Bit

This read-only bit indicates if the motor is at a steady speed or if it is

accelerating or declerating.

1 = Motor is accelerating or decelerating.

0 = Motor is at a steady speed.

FORWARD MOTION Bit

This read-only bit indicates the direction of the motor. It also indicates if the

motor is stopped.

1 = Motor is rotating in the forward direction. If this bit is a logic 1 and the

actual frequency (location $0085 and $0086) is 0, the motor is

stopped.

0 = Motor is rotating in the reverse direction.

MOTOR ENERGIZED Bit

This read-only bit indicates PWM output activity

1 = All PWM outputs are active.

0 = The PWM outputs are inactive or the bottom PWM outputs are in the

pre-charge cycle.

RESISTIVE BREAK Bit

This read-only bit indicates the state of the RBRAKE output pin

1 = The RBRAKE output pin is active. Braking is in progress.

0 = The RBRAKE output pin is inactive and no braking is in progress.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

EXTERNAL FAULT TRIP Bit

This read-only bit indicates a FAULT has occurred resulting from a logic 1

applied to the FAULTIN pin.

1 = A logic 1 was applied to the FAULTIN pin and a FAULT timeout is still

in progress.

0 = A logic 0 is applied to the FAULTIN pin and no FAULT timeout is in

progress.

OVER-VOLTAGE TRIP Bit

This read-only bit indicates if the voltage at the DC_BUS pin exceeds the

preset value of V_Busover voltage located at address $0068 and $0069.

1 = The voltage applied to the DC_BUS pin has exceeded the preset

value of V_Busover voltage and a FAULT timeout is still in progress.

0 = The voltage applied to the DC_BUS pin is less than the preset value

of V_Busover voltage and a FAULT timeout is not in progress.

UNDER-VOLTAGE Bit

This read-only bit indicates if the voltage at the DC_BUS pin is less than the

present value of V_Busbrownout located at address $0066 and $0067.

1 = The voltage applied to the DC_BUS pin is less than the present value

of V_Busunder voltage and a FAULT timeout is still in progress.

0 = The voltage applied to the DC-BUS pin is greater than the preset

value of V_Busunder voltage and a FAULT timeout is not in progress.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Address:

Read:

$00AE

Bit 7

Bit 0

BASE

FREQUENCY

SET

SPEED

SET

ACCELER- POLARITY DEAD TIME

ATION SET

SET

Write:

Reset:

= Unimplemented

Figure 15. Setup Register

BASE FREQUENCY SET Bit

This read-only bit indicates if the base frequency parameter has been set.

1 = Base frequency parameter has been set.

0 = Base frequency parameter has not been set.

SPEED SET Bit

This read-only bit indicates if the speed parameter has been set.

1 = Speed parameter has been set.

0 = Speed parameter has not been set.

ACCELERATION SET Bit

This read-only bit indicates if the acceleration rate parameter has been set.

1 = Acceleration rate parameter has been set.

0 = Acceleration rate parameter has not been set.

POLARITY SET Bit

This read-only bit indicates if the PWM polarity parameters has been set.

1 = PWM polarity parameters has been set.

0 = PWM polarity parameters has not been set.

DEAD TIME SET Bit

This read-only bit indicates if the dead time parameter has been set.

1 = Dead time parameter has been set.

0 = Dead time parameter has not been set.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

Address:

Read:

$0001

Bit 7

Bit 0

START/

STOP

FWD/

REVERSE

FAULT

OUT

RESISTOR

BRAKE

Write:

Reset:

= Unimplemented

U = Unaffected

Figure 16. Switch In Register

START/STOP Bit

This read-only bit indicates the state of the START input pin.

1 = The START input pin is at a logic 1.

0 = The START input pin is at a logic 0.

FWD/REVERSE Bit

This read-only bit indicates the state of the FWD input pin.

1 = The FWD input pin is at a logic 1

0 = The FWD input pin is at a logic 0

FAULT OUT Bit

This read-only bit indicates the state of the DT_FAULTOUT output pin.

1 = The DT_FAULTOUT output pin is indicating no fault condition.

0 = The DT_FAULTOUT output pin is indicating a fault condition.

RESISTIVE BRAKE Bit

This read-only bit indicates the state of resistive brake pin (RBRAKE).

1 = The RBRAKE output pin in active. Braking is in progress.

0 = The RBRAKE output pin in inactive and no braking is in progress.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

Address:

Read:

$FE01

Bit 7

Bit 0

PCMASTER

SOFTWARE

RESET

MC3PHAC

FUNCTIONAL FUNCTIONAL

MC3PHAC

POWER

RESET

LOW V

VOLTAGE

FAULT

COMMAND

Write:

Reset:

= Unimplemented

Figure 17. Reset Status Register

POWER UP Bit

This read-only bit indicates the last system reset was caused by the power-

up reset detection circuit.

1 = The last reset was caused by an initial power-up of the MC3PHAC.

0 = Power-up reset was not the source of the reset or a read of the reset

status register after the first read.

RESET PIN Bit

This read-only bit indicates the last system reset was caused from the

RESET input pin.

1 = Last reset was caused by an external reset applied to the RESET

input pin.

0 = The RESET pin was not the source of the reset or a read of the reset

status register after the first read.

MC3PHAC FUNCTIONAL FAULT Bits

This read-only bit indicates if the last system reset was the result of an

internal system error.

1 = MC3PHAC internal system error

0 = The FUNCTIONAL FAULT was not the source of the reset or a read

of the reset status register after the first read.

PC MASTER SOFTWARE RESET COMMAND Bit

This read-only bit indicates the last system reset was the result of a PC

master software reset command.

1 = The MC3PHAC was reset by the PC master software command reset

as the result of a write of $30 to location $1000

0 = The PC master software RESET COMMAND was not the source of

the reset or a read of the reset status register after the first read.

LOW V_DDVOLTAGE Bit

This read-only bit indicates if the last reset was the result of low V_DDapplied

to the MC3PHAC.

1 = The last reset was caused by the low power supply detection circuit.

0 = The LOW V_DDwas not the source of the reset or a read of the reset

status register after the first read.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

Command State Machine

When using the PC master software mode of operation, the command state

machine governs behavior of the device depending upon its current state,

system parameters, any new commands received via the communications link,

and the prevailing conditions of the system. The command state diagram is in

Figure 18. It illustrates the sequence of commands which are necessary to

bring the device from the reset condition to running the motor in a steady state

and depicts the permissible state transitions. The device will remain within a

given state unless the conditions shown for a transition are met.

Some commands only cause a temporary state change to occur. While they are

being executed, the state machine will automatically return to the state which

existed prior to the command being received. For example, the motor speed

may be changed from within any state by using the WRITEVAR16 command to

write to the "Speed In" variable. This will cause the "Set Speed" state to be

momentarily entered, the "Speed In" variable will be updated and then the

original state will be re-entered. This allows the motor speed, acceleration or

base frequency to be modified whether the motor is already accelerating,

decelerating, or in a steady state.

Each state is described here in more detail.

•

Reset — This state is entered when a device power-on reset (POR), pin

reset, loss of crystal, internally detected error, or reset command occurs

from within any state. In this state, the device is initialized and the PWM

outputs are configured to high impedance. This state is then

automatically exited.

PWMHighZ — This state is entered from the reset state. This state is

also re-entered after one and only one of the PWM dead-time or polarity

parameters have been initialized. In this state the PWM outputs are

configured to a high-impedance state as the device waits for both the

PWM dead time and polarity to be initialized.

SetDeadTime (write once) — This state is entered from the PWMHighZ

state the first time that a write to the PWM dead-time variable occurs. In

this state, the PWM dead time is initialized and the state is then

automatically exited. This state cannot be re-entered, and hence the

dead time cannot be modified, unless the reset state is first re-entered.

SetPolarity (write once) — This state is entered from the PWMHighZ

state the first time that the PWM polarity command is received. In this

state, the PWM polarity is initialized and the state is then automatically

exited. This state cannot be re-entered, and hence the polarity cannot

be modified, unless the reset state is first re-entered.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

CmdBaseFreqxx

from any state

CmdReset

Reset or

POR or

Loss of Crystal or

Internal Error

SetBaseFreq

Reset

Done

(return to

calling

state)

SetDeadTime

Initialized

(write once)

WRITEVAR16:Acceleration

from any state

CmdPWMTxBx

done

SetAccel

SetPolarity

(write once)

PWMHighZ

Done

(return to

calling

state)

PWM dead-time set &

PWM polarity set

WRITEVAR16:Speed

In from any state

Other PC master software

command from any state

PWMOFF

SetSpeed

Execute PC

Master Cmd

PWM base freq. set &

Acceleration set &

Speed In set

Done

(return to

calling

Done

(return to

calling

state)

PWM0RPM

Fault

CmdFwd |

CmdRev

Fault

PWMPump

Done & CmdFwd

Done & CmdRev

CmdRev &

Actual speed = 0

CmdFwd &

Actual speed = 0

CmdRev |

CmdStop

CmdFwd |

CmdStop

FwdDecel

FwdAccel

RevAccel

RevDecel

Actual speed =

Speed In

Speed In >

Actual Speed

Speed In >

Actual Speed

Actual speed =

Speed In

FwdSteady

RevSteady

Figure 18. PC Host Software Command State Diagram

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Operation

•

PWMOFF — This state is entered from the PWMHighZ state if both the

PWM dead time and polarity have been configured. In this state, the

PWM is activated and all the PWM outputs are driven off for the chosen

polarity. The device then waits for the PWM base frequency, motor

speed, and acceleration to be initialized.

PWM0RPM — This state is entered from the PWMOFF state when the

PWM base frequency, motor speed, and acceleration have been

initialized. This state can also be entered from the FwdDecel or

RevDecel states if a CmdStop command has been received, and the

actual motor speed has decelerated to 0 r.p.m. In this state, the PWM

pins are driven to the off state for the chosen polarity. The only exit of

this state is to the PWMPump state, which occurs when a CmdFwd or

CmdRev command is received.

•

PWMPump — This state is entered from the PWM0RPM state when a

CmdFwd or CmdRev command is received. In this state the top PWM

outputs are driven off while the bottom PWM outputs are driven with a

50 percent duty cycle. This allows high side transistor gate drive circuits

which require charge pumping from the lower transistors to be charged

up prior to applying full PWMs to energize the motor. This state is

automatically exited after the defined amount of time t_Pump(see

Electrical Characteristics).

•

FwdAccel — This state is entered from the PWMPump state after a

CmdFwd command is received and the timeout interval from the

PWMPump state is completed. This state can also be entered from the

FwdSteady state if the Speed In variable is increased above the actual

current speed and the RevDecel state if the actual motor speed equals

0 r.p.m. when a CmdFwd command has been received. In this state the

motor is accelerated forward according to the chosen parameters.

•

FwdSteady — This state is entered from the FwdAccel state after the

actual motor speed has reached the requested speed defined by the

Speed In variable. In this state, the motor is held at a constant forward

speed.

FwdDecel — This state is entered from the FwdAccel or FwdSteady

states whenever a CmdStop or CmdRev command is received. This

state can also be entered from the FwdSteady state if the Speed In

variable is decreased below the actual current speed. In this state, the

motor is decelerated forward according to the chosen parameters.

•

RevAccel — This state is entered from the PWMPump state. After a

CmdRev command is received and the timeout interval from the

PWMPump state is completed. This state can also be entered from the

RevSteady state if the Speed In variable is increased above the actual

current speed and the FwdDecel state if the actual motor speed equals

0 r.p.m. when a CmdRev command has been received. In this state, the

motor is accelerated in reverse according to the chosen parameters.

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

•

RevSteady — This state is entered from the RevAccel state after the

actual motor speed has reached the requested speed defined by the

Speed In variable. In this state, the motor is held at a constant reverse

speed.

RevDecel — This state is entered from the RevAccel or RevSteady

states whenever a CmdStop or CmdFwd command is received. This

state can also be entered from the RevSteady state if the Speed In

variable is decreased below the actual current speed. In this state, the

motor is decelerated in reverse according to the chosen parameters.

•

SetBaseFreq — This state is entered from any state whenever a

CmdBaseFreqxx command is received. In this state, the motor

frequency at which full voltage is applied is configured and the state is

then automatically exited and the original state is re-entered.

SetAccel — This state is entered from any state whenever a write to the

Acceleration variable occurs. In this state, the motor acceleration is

configured and the state is then automatically exited and the original

state is re-entered.

SetSpeed — This state is entered from any state whenever a write to

the Speed In variable occurs. In this state, the requested motor speed is

configured and the state is then automatically exited and the original

state is re-entered.

Fault — This state is entered from any state whenever a fault condition

occurs (see Fault Protection on page 16). In this state, the PWM

outputs are driven off (unless the fault state was entered from the

PWMHighZ state, in which case, the PWM outputs remain in the High Z

state). When the problem causing the fault condition is removed, a timer

is started which will wait a specified amount of time (which is user

programmable) before exiting this state. Under normal operating

conditions, this timeout will cause the Fault state to be automatically

exited to the PWM0RPM state, where motion will once again be initiated

if a CmdFwd or CmdRev has been received. The exceptions to this rule

are the cases when the Fault state was entered from the PWMHighZ or

PWMOFF states, in which case, exiting from the Fault state will return

back to these states.

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Optoisolated RS232 Interface Application Example

Some motor control systems have the control electronics operating at the same

potential as the high voltage bus. Connecting a PC to that system could present

safety issues, due to the high voltage potential between the motor control

system and the PC. Figure 19 is an example of a simple circuit that can be

used with the MC3PHAC to isolate the serial port of the PC from the motor

control system.

The circuit in Figure 19 is the schematic of a half-duplex optoisolated RS232

interface. This isolated terminal interface provides a margin of safety between

the motor control system and a personal computer. The EIA RS232

specification states the signal levels can range from ±3 to ±25 volts. A Mark is

defined by the EIA RS232 specification as a signal that ranges from –3 to –25

volts. A Space is defined as a signal that ranges from +3 to +25 volts.

Therefore, to meet the RS232 specification, signals to and from a terminal must

transition through 0 volts as it changes from a Mark to a Space. Breaking the

circuit down into an input and output section simplifies the explanation of the

circuit.

+5 V

4N35

1N4148

1 kΩ

1N4148

GND

DTR

TO MC3PHAC PIN 16

2.2 µF/50 V

1N4148

4.7 kΩ

TxD

RTS

RxD

+5 V

330 Ω

CON/CANNON9

FEMALE

TO MC3PHAC PIN 17

4N35

~+12 V

ISOLATION BARRIER

RS232 ISOLATED

HALF-DUPLEX, MAXIMUM 9600 BAUD

Figure 19. Optoisolated RS232 Circuit

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

To send data from a PC to the MC3PHAC, it is necessary to satisfy the serial

input of the MC3PHAC. In the idle condition, the serial input of the MC3PHAC

must be at a logic 1. To accomplish that, the transistor in U1 must be turned off.

The idle state of the transmit data line (TxD) from the PC serial port is a Mark

(–3 to –25 volts). Therefore, the diode in U1 is off and the transistor in U1 is off,

yielding a logic 1 to the MC3PHAC’s serial input. When the start bit is sent to

the MC3PHAC from the PC’s serial port, the PC’s TxD transitions from a Mark

to a Space (+3 to +25 volts), thus forward biasing the diode in U1. Forward

biasing the diode in D1 turns on the transistor in U1, providing a logic 0 to the

serial input of the MC3PHAC. Simply stated, the input half of the circuit

provides input isolation, signal inversion, and level shifting from the PC to the

MC3PHAC’s serial port. An RS-232 line receiver, such as an MC1489, serves

the same purpose without the optoisolation function.

To send data from the MC3PHAC to the PC’s serial port input, it is necessary

to satisfy the PC’s receive data (RxD) input requirements. In an idle condition,

the RxD input to the PC must be at Mark (–3 to –25 volts). The data terminal

ready output (DTR) on the PC outputs a Mark when the port is initialized. The

request to send (RTS) output is set to a Space (+3 to +25 volts) when the PC’s

serial port is initialized. Because the interface is half-duplex, the PC’s TxD

output is also at a Mark, as it is idle. The idle state of the MC3PHAC’s serial

port output is a logic 1. The logic 1 out of the MC3PHAC’s serial port output port

forces the diode in U2 to be turned off. With the diode in U2 turned off, the

transistor in U2 is also turned off. The junction of D2 and D3 are at a Mark (–3

to –25 volts). With the transistor in U2 turned off, the input is pulled to a Mark

through current limiting resistor R3, satisfying the PC’s serial input in an idle

condition. When a start bit is sent from the MC3PHAC’s serial port, it transitions

to a logic 0. That logic 0 turns on the diode in U2, thus turning on the transistor

in U2. The conducting transistor in U2 passes the voltage output from the PC’s

RTS output, that is now at a Space (+3 to +25 volts), to the PC’s receive data

(RxD) input. Capacitor C1 is a bypass capacitor used to stiffen the Mark signal.

The output half of the circuit provides output isolation, signal inversion, and

level shifting from the MC3PHAC’s serial output port to the PC’s serial port. An

RS-232 line driver, such as a MC1488, serves the same purpose without the

optoisolation function.

Mechanical Data

This subsection provides case outline drawings for:

•

Plastic 28-pin DIP, Figure 20

Plastic 28-pin SOIC, Figure 21

Plastic 32-pin QFP, Figure 22

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Mechanical Data

NOTES:

1. POSITIONAL TOLERANCE OF LEADS (D),

SHALL BE WITHIN 0.25mm (0.010) AT

MAXIMUM MATERIAL CONDITION, IN

RELATION TO SEATING PLANE AND

EACH OTHER.

2. DIMENSION L TO CENTER OF LEADS

WHEN FORMED PARALLEL.

3. DIMENSION B DOES NOT INCLUDE

MOLD FLASH.

MILLIMETERS

MIN MAX

INCHES

MIN MAX

DIM

36.45 37.21

13.72 14.22

1.435 1.465

0.540 0.560

0.155 0.200

0.014 0.022

0.040 0.060

3.94

0.36

1.02

5.08

0.56

1.52

2.54 BSC

0.100 BSC

1.65

0.20

2.92

2.16

0.38

3.43

0.065 0.085

0.008 0.015

0.115 0.135

SEATING

PLANE

15.24 BSC

0.600 BSC

0°

0.51

15°

1.02

0°

0.020 0.040

15°

Figure 20. Plastic 28-Pin DIP (Case 710)

-A-

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DIMENSION A AND B DO NOT INCLUDE MOLD

PROTRUSION.

14X P

-B-

0.010 (0.25)

4. MAXIMUM MOLD PROTRUSION 0.15

(0.006) PER SIDE.

5. DIMENSION D DOES NOT INCLUDE

DAMBAR PROTRUSION. ALLOWABLE

DAMBAR PROTRUSION SHALL BE 0.13

(0.005) TOTAL IN EXCESS OF D

DIMENSION AT MAXIMUM MATERIAL

CONDITION.

28X D

0.010 (0.25)

R ^{X 45°}

MILLIMETERS

MIN MAX

17.80 18.05

INCHES

MIN MAX

DIM

-T-

0.701 0.711

0.292 0.299

0.093 0.104

0.014 0.019

0.016 0.035

0.050 BSC

-T-

SEATING

PLANE

7.40

2.35

0.35

0.41

7.60

2.65

0.49

0.90

26X G

1.27 BSC

0.23

0.13

0°

0.32

0.29

8°

0.009 0.013

0.005 0.011

0° 8°

0.395 0.415

10.05 10.55

0.25 0.75

0.010 0.029

Figure 21. Plastic 28-Pin SOIC (Case 751F)

MOTOROLA

3-Phase AC Motor Controller

MC3PHAC/D

0.20 (0.008) AB T–U

–U–

–T–

DETAIL Y

–Z–

DETAIL Y

0.20 (0.008) AC T–U

NOTES:

1. DIMENSIONING AND TOLERANCING PER ANSI

Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.

3. DATUM PLANE –AB– IS LOCATED AT BOTTOM

OF LEAD AND IS COINCIDENT WITH THE LEAD

WHERE THE LEAD EXITS THE PLASTIC BODY AT

THE BOTTOM OF THE PARTING LINE.

4. DATUMS –T–, –U–, AND –Z– TO BE DETERMINED

AT DATUM PLANE –AB–.

DETAIL AD

5. DIMENSIONS S AND V TO BE DETERMINED AT

SEATING PLANE –AC–.

–AB–

–AC–

6. DIMENSIONS A AND B DO NOT INCLUDE MOLD

PROTRUSION. ALLOWABLE PROTRUSION IS

0.250 (0.010) PER SIDE. DIMENSIONS A AND B

DO INCLUDE MOLD MISMATCH AND ARE

DETERMINED AT DATUM PLANE –AB–.

7. DIMENSION D DOES NOT INCLUDE DAMBAR

PROTRUSION. DAMBAR PROTRUSION SHALL

NOT CAUSE THE D DIMENSION TO EXCEED

0.520 (0.020).

SEATING

PLANE

0.10 (0.004) AC

BASE

METAL

8. MINIMUM SOLDER PLATE THICKNESS SHALL BE

0.0076 (0.0003).

9. EXACT SHAPE OF EACH CORNER MAY VARY

FROM DEPICTION.

^8XM

MILLIMETERS

DIM MIN MAX

7.000 BSC

INCHES

MIN MAX

0.276 BSC

0.138 BSC

0.276 BSC

0.138 BSC

3.500 BSC

7.000 BSC

3.500 BSC

SECTION AE–AE

1.400

1.600 0.055

0.063

0.018

0.057

0.016

0.300

1.350

0.300

0.450 0.012

1.450 0.053

0.400 0.012

0.800 BSC

0.031 BSC

0.050

0.090

0.500

0.150 0.002

0.200 0.004

0.700 0.020

0.006

0.008

0.028

12 REF

0.006

0.016 BSC

DETAIL AD

0.090

0.160 0.004

0.400 BSC

0.150

0.250 0.006

0.010

9.000 BSC

0.354 BSC

4.500 BSC

9.000 BSC

4.500 BSC

0.200 REF

1.000 REF

0.177 BSC

0.354 BSC

0.177 BSC

0.008 REF

0.039 REF

Figure 22. Plastic 32-Pin QFP (Case 873A)

3-Phase AC Motor Controller

MOTOROLA

MC3PHAC/D

Mechanical Data

MOTOROLA

3-Phase AC Motor Controller

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Motorola Japan Ltd.; SPS, Technical Information Center,

3-20-1, Minami-Azabu Minato-ku, Tokyo 106-8573 Japan

81-3-3440-3569

ASIA/PACIFIC:

Information in this document is provided solely to enable system and software

implementers to use Motorola products. There are no express or implied copyright

licenses granted hereunder to design or fabricate any integrated circuits or

integrated circuits based on the information in this document.

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Silicon Harbour Centre, 2 Dai King Street,

Tai Po Industrial Estate, Tai Po, N.T., Hong Kong

852-26668334

Motorola reserves the right to make changes without further notice to any products

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MC3PHAC/D

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Motorola > Semiconductors >

MC3PHAC : Motor Control Unit

Page Contents:

The MC3PHAC is a high-performance monolithic intelligent motor controller designed specifically to meet

the requirements for low-cost, variable-speed, 3-phase ac motor control systems. The device is adaptable

and configurable, based on its environment. It contains all of the active functions required to implement the

control portion of an open loop, 3-phase ac motor drive.

Features

Documentation

Reference Designs

Tools

One of the unique aspects of this device is that although it is adaptable and configurable based on its

environment, it does not require any software development. This makes the MC3PHAC a perfect fit for

customer applications requiring ac motor control but with limited or no software resources available.

Orderable Parts

KMC3PHACVFA [NXP]

相关型号：

KMC3PHACVP

KMC3S005

KMC3S010

KMC3S012

KMC3S016

KMC3S020

KMC3S025

KMC3S035

KMC3S050

KMC3S075

KMC3S100

KMC3S110