摘要
阐述了晶闸管调压电路的原理,研究了异步电动机功率因数角随转速变化的规律以及功率因数角的检测方法.运用限流开环控制方法和功率因数角闭环控制方法分别对高压异步电动机软起动过程进行了仿真.仿真结果表明,采用功率因数角闭环控制可使起动过程中定子电流和转矩的振荡得到很好的抑制,比限流开环控制起动效果要好.
The principle of thyristor voltage regulator was discussed. The rules of the power factor angle changing with rotating speed in an induction motor and its detection method were investigated. Simulations for soft starting procedure were made with current-limited open loop control method and closed loop control method of the power factor angle. Simulation proved that the fluctuation of current and the electro magnetic moment can be restrained obviously, more effectively with the closed loop control method than with the current-limited open loop control.
出处
《应用科技》
CAS
2008年第5期52-55,共4页
Applied Science and Technology
关键词
高压异步电动机
软起动
调压
功率因数角
high voltage induction motor
soft starting
voltage regulator
power factor angle
