晶闸管(可控硅)Thyristors (SCRs),三相桥式半控模块(带续流二极管),Three Phase Half Controlled Bridge With Wheeling Diode.晶闸管(可控硅)晶闸管(SCR ) ,三相桥式半控模块(带续流二极管) ,三相半控桥带续流二极管。