说明：  单相桥式整流电路闭环相控调压，simulink中搭建单相桥式整流电路，利用PI控制方式，实现输出电压的相控
(The single-phase bridge rectifier circuit is closed-loop phase controlled voltage regulation, the single-phase bridge rectifier circuit is built in Simulink, and the PI control mode is used to realize the phase control of output voltage)