Design of Brushless DC Motor Controller with the Hall Position Sensor

Abstract

In the paper, the controller uses a MCU (dsPIC30F) to detect the position of the BLDCM by Hall Position Sensor, which can get the corresponding coding value. Each combination of values represents the current position of the BLDCM rotor. When the rotor position changes, the sensor level will change and the MCU will be interrupted. According to the position code, the corresponding power tube is opened or closed to drive the BLDCM. Changing the duty cycle of PWM can control the conduction time of power tube to adjust the BLDCM speed. If the voltage temperature and speed sampling signals exceed the allowed range, the PWM signal will be blocked to protect the controller and the BLDCM.