The Speed Control Methods Difference Of Brushed Motor And Brushless Motor

In fact, the control of both motors is voltage regulation, only because the brushless DC motor adopts electronic commutation, so it can only be achieved by digital control, and the brushed DC motor is commutated by carbon brushes, using thyristors, etc. Traditional analog circuits can be controlled, which is relatively simple.


1. The speed adjustment process of the brushed motor is to adjust the voltage level of the motor power supply. 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 speed. This process is called variable speed regulation.


2. The speed adjustment process of the brushless motor is that the voltage of the power supply of the motor is unchanged, the control signal of the ESC is changed, and the switching rate of the high-power MOS tube is changed by the microprocessor to achieve the change of the speed. This process is called frequency conversion speed regulation.