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
ECLIPSE SHUTOFF VALVE ACTUATOR 2000 AT MODEL 15940 NEW
ALLEN BRADLEY 1771-QDC NEW 1771QDC SER. D FACTORY SEAL
MODICON 416NHM30030 NEW 416 NHM 300 30
YASKAWA CIMR-15AS2 REMANUFACTURED CIMR15AS2
STI SAFETY LIGHT CURTAIN SET 36” MS4436R MS4436X
FANUC A16B-1200-0800 USED A16B12000800
