说明：  电容滤波的单相不可控整流电路，在交-直-交变频器，不间断电源，开关电源中具有广泛应用。经验证可很好运行
(Single-phase capacitor filter uncontrollable rectifier circuit, AC- DC- AC inverter, uninterruptible power supply, switching power supply has a wide range of applications. Proven to be a good run)