Permanent magnet motor price: If the controller is regarded as a power supply, the motor is regarded as a load, the motor is an actuator, the controller needs to serve the motor. the parameter point of view, the phase Angle, current, power voltage parameters of the controller need to meet the requirements of the motor.

If the motor is brushed depends on mechanical commutation, it is good to ensure that the higher voltage larger current of the controller output are greater than equal to the rated voltage rated current of the motor. Brushless motor is electronic commutation, voltage current these parameters should also be greater than equal to the rating of the motor, to consider the Hall signal configuration problem.

The voltage of the controller is of course higher than the higher voltage of the battery, the nominal voltage of the battery is a higher voltage, the generally higher voltage is about 1.2 times the nominal voltage, such as the 60 volt battery, which may be fully charged to 72 volts.

The higher the voltage of the motor, the higher the efficiency of the motor will be, but the voltage is too high, the insulation requirements for the wire controller are stricter, the battery management is difficult, it is easy to have safety problems.

The greater the power of the controller, of course, the better, but if the motor power is relatively small, the battery capacity is insufficient, the bigger the controller is bought, which is virtually a waste, resulting in a big horse car, the lighter the electric car, the better the controller is necessarily a good thing.

The controller has over-voltage under-voltage protection functions, which need to be configured taking into account the higher lower voltage of the battery, otherwise it may cause the battery to be protected before it is discharged, the battery voltage is too high to cause no output.