正弦脉宽调制逆变器及其电路分析

Sinusoidal pulse-width Modulation Inverter and its Circuit Analysis

厂矿企业的办公、通讯用电以及关键工作环节的照明是刻不容断的。然而，主供电系统难免发生故障而引起停电，导致照明中断，这就需要设置一个备用供电系统在偶发停电时迅速恢复照明供电。逆变调制供电系统是备用供电的良好选择；本文对这种备用供电系统的主电路、控制电路和保护电路，逐一进行了论述与分析。

he electricity for office communication and lighting at critical work place is not allowed to be out of supply at any time.However,the main power supply system is hard to avoid malfunction so as leading to power failure and lighting discontinuity.Thus,it is needed to set up a standby power supply system to regain power supply for lighting rapidly at the time of power failure.An inverse modulation power supply system is the good choice for standby power supply.This paper discussed and analysed the main circuit,controlling circuit and protective circuit of this standby power supply system respectively.