Research of three phase SPWM algorithm based on XC164

Based on the SPWM theory,a three phase SPWM algorithm with principle of equivalent area compensation is put forward.This algorithm could extend the linear scale by the way of reshaping modulating function in advance,which makes the output fundamental keep linear with the modulation wave while the modulation M is more than 1,and produces a higher precision output waveform.The experiment result shows that the algorithm have these merits: the higher utilization ratio of the voltage,the lower harmonic loss,the simple calculating method.