Study of a novel dead-time compensation method for SVPWM

The dead-time effect in a three-phase voltage source inverter can result in voltage losses,current waveforms distortion and torque pulsation.In order to improve the current waveforms and decrease the torque pulsation,this paper analyzes the influence of dead-time on output voltage in detail,and proposes a dead-time compensation method of space vector pulse-width modulation(SVPWM).The proposed method changes the traditional 180 degree turn-on mode into 120 degrees plus 180 degrees turn-on mode,through which the influence of dead time can be reduced to zero due to the alternate use of the two strategies.Compared to traditional SVPWM technique,the designed method is simple to realize because only part of program needs to be modified,and the correctness and feasibility of the algorithm are also verified by simulation and experiments results.