控制电动机的转矩和转速，将电能转换成机械能，实现机械的旋转运动或反复运动。
By control the electric motor's torque and rotational speed, electric energy will be changed into mechanical energy, then mechanical rotary motion and repeated movement are realized.
控制电动机的转矩和转速，将电能转换成机械能，实现机械的旋转运动或反复运动。
By control the electric motor's torque and rotational speed, electric energy will be changed into mechanical energy, then mechanical rotary motion and repeated movement are realized.
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