New space vector PWM drive for the control of twophase BLDC

LU Chunhong, ZHANG Wei

(College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China)

Abstract: Aiming at the low utilization rate of dc voltage Hbridge inverter and the complicated structure and the poor economic effect of doubleHbridge inverter in the control of twophase BLDC, study on the inverter and the control strategy of twophase BLDC was carried out, and a space vector pulsewidth modulation(SVPWM) system of twophase BLDC which used sixswitch inverter was proposed. A twophase BLDC control system which used double close loops of speed and current control was simulated through Matlab/Simulink. The control performance and the dc voltage utilization rate were tested by using PSoC. The results indicate that the system can realize the quick control of speed and the current of twophase BLDC, and improve the utilization rate of bus voltage. The method is proved to be of great significance.

Key words: sixswitch inverter; twophase BLDC; space vector pulsewidth modulation (SVPWM); PSoC