Analysis and Implementation of a Single-Stage Flyback PV Microinverter With Soft Switching
作者： Nikhil Sukesh , Majid Pahlevaninezhad , Praveen K. Jain
关键词: Electrical engineering 、 Flyback converter 、 Electronic engineering 、 Transformer 、 Flyback transformer 、 Transistor 、 Solar micro-inverter 、 Capacitor 、 Inverter 、 Computer science
摘要: This paper presents a novel zero-voltage switching (ZVS) approach to grid-connected single-stage flyback inverter. The soft-switching of the primary switch is achieved by allowing negative current from grid side through bidirectional switches placed on secondary transformer. Basically, discharges metal-oxide-semiconductor field-effect transistor's output capacitor, thereby turn under zero voltage. To optimize amount reactive required achieve ZVS, variable-frequency control scheme implemented over line cycle. In addition, transformer have ZVS during turn- times. Therefore, losses are negligible. A 250-W prototype has been validate proposed scheme. Experimental results confirm feasibility and superior performance converter compared with conventional
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