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Method of Pulse Width Modulation for Brushless Motors

Brushless motors have good performance in terms of usage, which we all know. In many industries, we need to operate them according to certain methods. During the use process, it is already a fully demonstrated advantage. We need to learn how to perform pulse width modulation. Below, we will specifically explain some methods of pulse width modulation for brushless motors.
1、 Pulse width modulation can be generated by programming a microcontroller with PWM output, or it can be implemented using a dedicated PWM chip. When the frequency of the PWM wave is too high, it requires too much power from the power transistor of the brushless motor drive. However, when its frequency is too low, the electromagnetic noise generated is relatively large. In practical applications, when the frequency of the pulse width modulation wave is around 18KHz, the effect is very good.


brushless motor

2、 In the circuit design of brushless motors, hardware circuits are designed based on circuit principles, and this measuring device can measure the speed range of brushless motors over a large range. Through each rotation of the motor, it will pass through the infrared tube speed measurement circuit and accumulate. Within 1 second, the specific size of different speed levels can be determined by the different values. The size of the infrared tube speed measurement circuit obtained varies depending on the number of turns and duty cycle completed within a fixed time. The specific speed value can be displayed on the digital tube through software programming.
So we can use the methods introduced above to carry out some adjustment work. Pulse width modulation of brushless motors can improve overall efficiency and achieve better performance. As long as everyone can use brushless motors in the correct way.
Editor: Amy

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