摘要
大功率晶体管ＧＴＲ与ＳＰＷＭ技术替代晶阐管ＳＣＲ与矩形波变频技术后，使异步电动机变频调速系统的性能获得了很大的提高。
After the GTR iaverter and SPWM technique replacing the SCR and the square Waveform technique, the performance of the speed regulating system for asynchronous induction motor haS greatly im proved.
关键词
变频调速系统
逆变器
异步电动机
GTR
SPWM technique
VVVF control
variable freqency vsriable speed System for ac motor.
