Description
系统给定为零时,转速调节器ASR、电流调节器ACR被零速封锁信号锁零。此时,系统主要由环流调节器ARR组成交叉反馈的恒流系统。由于环流给定的影响,2组可控硅均处于整流状态,输出的电压大小相等、极性相反,直流电机电枢电压为零,电机停转,输出的电流流经2组可控硅形成环流。环流不宜过大,一般限制在电机额定电流的5%左右。
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