PWM发生器模型，给做逆变整流电路的一点方便，全部都是用模块搭建的-PWM generator model, to make the point easy inverter rectifier circuit, all built with the modules

固定电流滞环PWM仿真模型 调试好了 需要的拿走 还可以用来获得波形的频率测量模块 自己编写的-Hysteresis PWM constant current simulation models need to take away good debugging can also be used to obtain the waveform frequency measurement modules have written