The rated current of the brushless DC motor is generally required by users, and it involves the power of the DC power supply and the discharged power (Ah). The smaller the current of the battery used by the motor, the longer the battery can be used for a single charge. Especially in the electric bicycle motor, the user wants the motor to have a longer mileage, and the rated current of the motor should be relatively small. The determination of the current is exquisite. Therefore, the editor of brushless DC motor manufacturers introduces the following factors that affect the rated current of brushless DC motors.
(1) The input power of the motor at the rated point is determined, and the efficiency of the motor is basically determined. The higher the rated voltage of the motor, the smaller the rated current.
(2) The larger the torque constant of the motor, the smaller the rated current of the motor.
(3) Minimize the torque of the motor as much as possible, that is, reduce the no-load loss of the motor, and reduce the no-load current of the motor, so that the rated current of the motor will be reduced accordingly, but not much.
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