After knowing how to choose a controller that matches the motor, let's talk about the impact on the motor if the controller power is too small or too large.
Let me talk about the problem that the controller power is too small. For example, the maximum output power of a 60V motor is 2KW, while the maximum output power of a controller with a 60V is only 800W.
For example, the maximum average current of the controller of 60V800W is 13.3A, and the average current of the phase current protection value when the motor is locked is 3 times, that is, the phase current protection value is 40A. The maximum average current of the 60V2KW motor is 33.3. It is assumed that the phase current protection value of the matched motor controller is also set to 3 times of the average current, which is 100A. If the control of 800W is matched with the motor of 2KW, the controller is equivalent to the small horse-drawn cart, and the controller will damage the power tube of the controller due to the problem of power tube and heat dissipation. If the controller software does not have phase current limit protection, the controller damage rate will be higher.
Finally, if the power of the selected controller is too large, the motor output phase current will be greater than the maximum capacity of the motor when the motor is operated under heavy load. Short-time light load use generally does not cause damage to the motor, but if it is operated for a long time, the motor will be seriously heated, damage the internal Hall sensor of the motor, and even burn the stator winding of the motor.
If you want to buy a household appliance motor, please pay attention to electric baker motor.
