大家知道，市电或其他的交流电可以通过二极管或可控硅的单向导电性整流成直流电供
给需要使用直流电的场合。这种把交流电变换成直流电的过程我们叫做整流，也叫做顺变。那么逆变呢？我们自然地就会想到，应该就是把直流电变换成交流电的过程。逆变电源就是相对于整流器而言通过半导体功率开关器件的开通和关断把直流电变换成交流电的这么一个装置。(As you know, the power supply or other alternating current can be rectified by direct conduction of diode or thyristor to DC power supply.
Give an occasion where direct current is needed. This process of converting alternating current into direct current is called rectification, also called transformation. So what about the change? We naturally think that it should be the process of converting direct current into alternating current. The inverter is a device that converts the direct current into alternating current through the opening and closing of the semiconductor power switch compared with the rectifier.)