Variable Frequency Phase Shift Modulation and Soft Switching Algorithm for High Frequency Isolated Matrix-Type Inverter

Le résumé fourni par la source

In order to solve the problem of high peak inductor current when the single stage single phase high-frequency isolated matrix-type inverter (HFIMI) operates with the conventional schemes, a variable frequency phase shift (VFPS) modulation is proposed without adding extra auxiliary circuit. The single-stage power conversion structure includes a dc side full bridge inverter and an ac side matrix-type converter (MC). The extended phase shift (EPS) modulation and pulse width modulation (PWM) is combined with the variable frequency modulation to form a hybrid control strategy, which provide linear power control and significantly simplifies the complexity of the controller design. Besides, the high- and low- frequency interleaved control is employed in the MC to reduce the high frequency conduction loss. Under the proposed VFPS strategy, a specified control route with minimum peak inductor current is then developed, along which the HFIMI implements full soft-switching operation in the whole load range with high efficiency. Finally, a 500W prototype was built to experimentally confirm the validity and feasibility of the proposed control strategy.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.