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有源逆变发生的条件为( )

单选题
2021-09-01 19:53
A、要有直流电动势
B、要求晶闸管的控制角大于900
C、直流电动势极性须和晶闸管导通方向一致
D、以上说法都是对的
查看答案

正确答案
C

试题解析

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