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72V new style electric motorcycle with top quality
Sep 21, 2017

The motor speed control device is set for the electric vehicle's variable speed and direction transformation, and its function is to control the voltage or current of the motor, and to complete the driving torque and rotation direction of the motor. Prior to the electric vehicle, the DC motor speed control using a series of resistors or change the motor magnetic field coil number of turns to achieve. It is rarely used today because of its level of speed and additional energy consumption or the complex structure of the motor.