Time sharing sinewave modulated single-phase inverter using bypass diode assisted sinewave absolute value tracking boost chopper with non electrolytic capacitor DC link

This paper is aimed at presenting a novel system topology and control scheme of a selective dual mode pulse modulated high efficiency single-phase sinewave power conversion circuit for new energy generation and storage applications. This power conversion system is composed of a time-sharing operated sinewave absolute modulation boost chopper with a bypass diode in the first power conditioning and processing stage and time-sharing sinewave partially pulse modulated full-bridge inverter in the second stage. The proposed power conditioner is operated by selective timesharing dual mode pulse pattern signal processing control scheme without electrolytic capacitor DC link. The unique operating principle of the two-power conditioning and processing stages with sectional time-sharing dual mode partial sinewave modulation scheme is described and discussed with a design example. In addition, the paper proposes also a sinewave tracking voltage controlled soft switching PWM boost chopper with a bypass diode loop, which includes a passive auxiliary edge-resonant snubber. The new conceptual operating principle and the control implementation of this novel power conditioner are presented and evaluated through experimental and simulation results.