Research on a High Gain DC/DC Converter for Photovoltaic Applications
A novel integrated DC/DC converter is proposed based on the basic power unit composed of coupling inductor,switched capaci-tor and input voltage source.The topology is modular and scalable.The voltage doubling unit composed of coupled inductor and switched capacitor improves the boost ratio of the circuit.The leakage energy is recovered through the clamping circuit to reduce the voltage stress and power loss of the switch.At the same time,the reverse recovery problem of diode is alleviated,and the selection of switch and diode is optimized.The steady state analysis,working principle and design considerations are introduced in detail.Finally,a 90 W experimental prototype is made to verify the correctness of the theoretical analysis.
high voltage gainswitched capacitorcoupled inductor
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维普
