描述
再生过电压保护,应用逆变器使电动机快速减速时,由于再生功率使直流电路电压升高,有时超过容许值,可以采取停止逆变器运转或停止快速的方法,防止过电压。瞬时停电保护,对于毫秒级内的瞬时断电,控制电路工作正常。但瞬时停电如果达数10ms以上时,通常不仅控制电路误动作,主电路也不供电,所以检测出后使逆变器停止运转。接地过电流保护,逆变器负载接地时,为了保护逆变器,要有接地过电流保护功能。但为了保证人身安全,需要装设漏电保护断路器。
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