An Approach to Position Sensorless Control System for Brushless DC Motor

• Published in: 2010 2nd International Conference on Information Engineering and Computer Science pp. 1 - 4
• Main Authors: Li Zeng, Zicheng Li
• Format: Conference Proceeding
• Language: English
• Published: IEEE 01.12.2010
• Subjects: Brushless DC motors; Commutation; Digital signal processing; Permanent magnet motors; Rotors

This paper describes a control system of sensorless brushless DC(BLDC) motor. Firstly, the back-EMF is adopted to detect rotor position. Secondly, the back-EMF is very small in the motor starting process, and it is difficult to obtain rotor position efficiently. A re-setting method of the rotor is p...