What are the differences between brushed and brushless motor speed control?

Life in common motors are mainly brushless and brush two, brush contact earlier, has been used to this day, many industries are still in use, but because of the need to often change the brush, so it is more trouble, with not more okay, if you need to use frequently, it is recommended to use the brushless series is better, without brushes, much more convenient. Today we do not talk about the difference between brush and brushless, let’s talk about the difference between brush motor and brushless motor speed control.

In fact, the control of both motors is voltage regulation, but because brushless DC uses electronic commutation, it can only be achieved by digital control. And brush DC is commutated by carbon brushes, which can be controlled by traditional analog circuits such as thyristor, which is simpler.

1. The process of brush motor speed regulation is to adjust the voltage of the motor power supply. The adjusted voltage and current are converted by the commutator and brushes to change the magnetic field strength generated by the electrodes to change the speed. This process is called variable voltage speed regulation.

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

These are the differences between brush motor and brushless motor speed control, only by mastering these basics can we make better use of them and bring more benefits to our production life!

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