1. The motor speed control device is set for the speed change and direction change of electric vehicles, and its function is to control the voltage or current of the motor, and complete the control of the driving torque and rotation direction of the motor.
2. Nowadays, the most widely used electric vehicle is the thyristor chopping speed regulation, which realizes the stepless speed regulation of the motor by uniformly changing the terminal voltage of the motor and controlling the current of the motor.
3. In the continuous development of electronic power technology, it has gradually been replaced by other power transistors (including GTO, MOSFET, BTR and IGBT, etc.) chopper speed regulation devices.
