Research and Implementation of the combined three-phase inverter with wideband and low-distortion

This paper focuses on the combined three-phase inverter with wideband and low-distortion. Synchronous modulation with adaptive technology is proposed for a wide range frequency adjustment. A synthesized control (repetitive control and PI control) and single polarity double frequency are used for the reduction of output voltage waveform distortion. The implementation based on DSP is also presented in this paper, and experiments of the inverter working on 300–800 Hz are shown to proving that the output voltage waveform is excellent (less than 1% distortion).