An isolated single stage buck-boost inverter

This paper presents a novel isolated single stage buck-boost inverter for implementing dc-to-ac, ac-to-dc or dc-to-dc. The BBI has better performances, in terms of low cost, high efficiency and high voltage gain. Through the HEV/EV application, the circuit operation principles and characteristics have been analyzed. And then, a novel Synchro-Switching SVPWM have been presented to obtain the maximum buck-boost factor and ZVS or ZCS conditons on the main switches and to reduce the magnetizing inductance value of transformer. The experimental results have confirmed the operating principle and the analysis method.

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