The control technique of three-phase voltage-source inverter output waveform based on internal model theory

CVCF inverters are usually applied in critical situations, whose quality of output waveform is one of the most important aspects in evaluating its performance. This paper analyses the feasibility of the three-phase inverters´ output waveform control scheme based on internal model theory in rotating frame. One scheme is present which is the combination of instantaneous feedback control internal model restraining fundamental component disturbance and repetitive control internal model restraining harmonic component disturbance and asymmetrical disturbance. The experiments verify the scheme can work well. Fast response, highly accurate steady output and less distorted waveform is gained.