关键词: 感应电机, 低电压穿越, 弱磁控制, 阀门电机, 电压反馈补偿

Abstract:

In view of the problem that the traditional reactor valve control mode is slowed down when the grid voltage drops,the system safety requirements cannot be met, and a low voltage crossing technology using closed-loop feedback weak magnetic compensation for valve motor was studied. When the grid voltage drops,the valve motor is voltage compensated weak magnetic control, so that the valve can maintain the speed stable under low voltage conditions,complete the on-off valve action within the specified time . Theoretical analysis and experiments show that the technology can stabilize the valve motor speed under the condition of voltage drop,and realize the low voltage crossing of the key valve motor of the reactor.

Key words: induction motor, low voltage crossing, weak magnetic control, valve motor, voltage feedback compensation