LIU Yun, JIA Hongping, ZHANG Peng, GENG Tianjun

(School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China)

 

Abstract: Aiming at the problems of start shaking,large torque ripple and loud noise of brushless direct current motor(BLDCM) under the control of squarewave,the sinusoidal current drive based on space vector pulse width modulation(SVPWM) method was proposed,the mathematical model of BLDCM in dq coordinates was deduced and the variation of quadrature axis current(iq) in vector control were qualitatively analyzed.The basic principle and control algorithm of voltage space vector control was introduced and the simulation model of system with Matlab7.0/Simulink was established.The results indicate that vector control system of BLDCM based on SVPWM has good static and dynamic characteristics;At the same time,the simulation results compared with the results under control of square wave indicate that BLDCM under different loads by vector control can achieve low torque ripple,smooth movement,starting fast and high efficiency running effects.

Key words: brushless direct current motor(BLDCM); space vector pulse width modulation(SVPWM); Simulink simulation; vector control