中文说明：
三相PWM整流器仿真文件，包括S函数实现，实现了四象限整流器输入电流谐波，功率因数可控，输出母线电压稳定。
English Description：
The simulation file of three-phase PWM rectifier, including the realization of s function, realizes the harmonic of input current, controllable power factor and stable output bus voltage of four quadrant rectifier.