单极性PWM控制方式Simulink仿真，很简单，便于电力电子初学者学习，里面还加了一个模拟滤波器，也很简单，但想法非常重要-Unipolar PWM control Simulink simulation, very simple, easy for beginners to learn power electronics, which also added a simulated filter, is also very simple, but very important idea