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In this paper, a 5-kW photovoltaic (PV) inverter with more than 99% peak efficiency is presented. The inverter utilizes two coupled inductors in one resonant pole to ensure the zero-voltage switching (ZVS) for main switches, and zero-current switching (ZCS) for auxiliary switches. Due to the favorable cooling and ease of fabrication characteristics, PCB planar magnetics are employed as the coupled...
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