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This paper introduces a new single-switch nonisolated dc-dc converter with very high voltage transfer ratio and reduced semiconductor voltage stress. The converter utilizes an integrated autotransformer and a coupled inductor on the same core to achieve a high step-up voltage gain without extreme duty cycle. Further, an integrated passive regenerative circuit recycles the leakage energy of the coupled...
This paper presents the development and experimental performance of a 2-kW interleaved DC-capacitorless single-phase inverter. By utilizing an AC capacitor to absorb the ripple power pulsating at twice the line frequency, the proposed interleaved DC-capacitor-less single-phase inverter significantly reduced the total capacitor size. The adoption of SiC MOSFET with 216-kHz switching frequency and the...
This paper proposes a family of simple, precise and lossless current balancing methods based on charge balancing for multi-output LED strings application. A capacitor is in series with the transformer secondary side to block the output DC voltage difference, and the output current balancing can be achieved by capacitor charge balancing. Compared to the conventional active current sharing technique...
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