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母线电流、电机额定电流、Iq之间的关系?

永磁同步电机矢量控制,三相桥式逆变电路,

如题所示,请问大家:

1.如何根据电机的额定电流,控制母线电流的阈值呢?

2.速度环输出是电流环输入,请问如何决定电流环限幅呢,即如何根据电机额定电流觉得速度环输出限幅呢?或者电流环限幅是不是和电机额定转矩有关呢

谢谢