五相电压源逆变器SVPWM优化算法

o achieve higher DC voltage utilization and lower output voltage harmonics, a novel SVPWM algorithm using four nearest space vectors was provided basing on the analysis of different SVPWM schemes, when modulation ratio m≤1.0514, third harmonic in output voltage could be kept as zero due to controlling of third space vectors, when 1.0514≤m≤1.231, the fundamental voltage was composed by optimal redistributing of space vectors using time, the value of third output voltage harmonic could be reduced at the same time, which made the characters of VSI optimal. Simulation model was constructed basing on Matlab, and the simulation results verified the algorithm above.