What is the difference on speed control model between the brushless motor and brush motor?

1. The brush motor speed regulation process is to adjust the voltage of the motor power supply voltage. The adjusted voltage and current are converted by the commutator and the brush to change the strength of the magnetic field generated by the electrode to achieve the purpose of changing the rotational speed. This process is called variable voltage speed regulation.
2. The brushless motor speed regulation process is that the voltage of the power supply of the motor is constant, the control signal of the ESC is changed, and the switching speed of the high-power MOS tube is changed by the microprocessor to realize the change of the rotation speed. This process is called variable frequency speed regulation.

In summary, the brushless motor plus brushless ESC is equivalent to a motor that improves the function of the commutator and the brush; the brush motor is equivalent to a brushless motor after removing the commutator and the brush.

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