The zero-voltage switching (ZVS) turn-on and zero-current switching (ZCS) turn-off can be achieved for active switches and diodes, thereby minimizing the switching losses. Compared with the conventional series resonant converter (SRC), a dual-mode rectifier (DMR) is configured on the secondary side, which enables a twofold voltage gain range for the proposed converter with a fixed-frequency phase-shift modulation scheme. This paper proposes a new series resonant dc-dc converter for PV microinverter applications. Thus, the PV-connected converters should be capable of handling a wide input voltage range while maintaining high efficiencies. The photovoltaic (PV) output voltage varies over a wide range depending on operating conditions.
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