Study on Single-phase PWM Control Five-Level Inverter based on DSP

Multilevel inverter has been paid more and more attentions because of its good characteristics with low output harmonics,high power capacity,good electromagnetic compatibility and so on.Topology structure and control strategy of a single-phase 5-level inverter are presented.Through effectively taking use of hardware source of DSP TMS320LF2407,regular sampling of SPWM was realized,and single-phase 5-level pulse output waveform was obtained by triangle carrier POD sub-harmonic PWM modulation.The results show the single-phase PWM control five-level inverter based on DSP can more effectively eliminate the harmonics,improve output waveform's dynamic and steady performance,and enhance output electric energy quality.