Study on control of  SVPWM

HE Kaihang
(College of Education,  Zhejiang University of Technology ,Hangzhou 310023, China)

Abstract：In order to solve the problems of general sinepulse width modulation(SPWM) modulation in motor control, such as small harmonic component, high efficiency in voltage utilization and difficult realization of digitization, etc., it is of great significance to apply the space vector pulse width modulation (SVPWM) technology to the field of AC drive control. By means of building models based upon the SVPWM control principles,  the relationship between high & low level effective, sector selection and switching point of the comparator, was analyzed and then  various ways of how to select sections in vector control algorithm were put forward, which was accordingly evaluated by taking upward sawtooth wave as an example. Finally a simulation test was further conducted on the basis of theoretical deduction. The experimental results show that in the vector control algorithm the sector selection and switching point always varies with the high and low level effective in the comparator.
Key words：space vector puse width modulation (SVPWM)；  sinepulse width modulation(SPWM); high level effective; low level effective