Isolated IGBT drives feedback circuit

The utility model discloses an isolated IGBT drives feedback circuit, include electric connection's host system in proper order, drive module, the IGBT switch module, still include optical coupling isolation detection module, optical coupling isolation detection module respectively with the IGBT switch module, host system electric connection carries out the comparison with the PWM signal in detecting IGBT switching signal and to feed back host system, this design realizes effectual electric isolation, and lower cost, can detect whole inverter circuit, as long as there wherein have an arbitrarylink to appear to be unusual, reduce the error of signal simultaneously, and improving determination accuracy. 本实用新型公开了种隔离式IGBT驱动反馈电路，包括依次电性连接的主控模块、驱动模块、IGBT开关模块，还包括光耦隔离检测模块，光耦隔离检测模块分别与IGBT开关模块、主控模块电性连接以检测IGBT通断信号并反馈到主控模块中与PWM信号进行比较，本设计实现有效的电气隔离，成本较低，能够对整个逆变回路进行检测，只要其中有任意个环节出现异常，同时减少信号的误差，提高判断的准确性。