IGBT-SPWM-VVVF交流调速系统中的缺相和过流保护系统的设计

摘要

There are many designs on Phase Loss and Over-current Protection System in IGBT-SPWM-VVVF AC speed regulating system. In this article the author designed a related electronic curcuit to protect over-current and short curcuit based on the current transformer(CT) to test the line current. And it is with reliable function, simple structure and hign feasilibility after debugging.%IGBT-SPWM-VVVF交流调速系统中的缺相和过流保护系统设计方法很多，本设计基于电流互感器对线路电流进行检测，利用三相电流的对称性检测断路保护，设定电流区间利用电子线路对过流进行保护，功能可靠，结构简单，经过调试可行。