asynchronous machine's rotor speed is negative

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Fevzican Sahin
Fevzican Sahin 2018-5-24
回答： afnan sahuon 2023-6-6
There is a machine model 07 (200 HP 460V 60 Hz 1785 RPM), when i input 700N.m torque, speed goes negative value. 700 Nm is not over on nominal power, it mustnt reverse direction.

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回答（2 个）

Subrat Borgohain
Subrat Borgohain 2021-6-14
exchange two of the source voltages, and it will be solved.
afnan sahuon
afnan sahuon 2023-6-6
firstly, let slip of IM equal 0 and run the model
after that modify the slip into 1.
the rotor speed will be exactly, starts from zero and positive value.

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