New sliding mode controller for BLDCM based on vector control technology
CHEN Hui, HUANG Qiao liang
(School of Electronic Information, Jiangsu University of Science and Technology, Zhenjiang 212003, China）

Abstract: Aiming at the control efficiency of the sine wave brushless DC motor, the control mode was studied, and the vector control method was used to replace the traditional square wave drive to improve the efficiency of the motor. A new type of integral sliding mode controller with exponential approach law was designed to improve the anti jamming and the speed tracking of brushless DC motor control system. The chattering problem can be restrained effectively and the sliding mode reaching speed can be improved by the new reaching law, at the same time, the overshoot of the system was significantly reduced. The switching function was replaced by a sinusoidal saturation function with variable boundary layer, which was used to weaken the chattering, and the theoretical analysis was carried out. Finally, the design of the control method was proved by the Simulink simulation. The research results indicate that the design of the speed controller is better than the traditional sliding mode controller and integral sliding mode controller in suppressing chattering and speed tracking performance.

Key words: BLDCM; vector control; integral sliding mode control; sine type saturation function