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In this paper, a novel active clamp Flyback-Forward converter is proposed for large voltage gain and high power applications. The interleaved configuration on the primary side is employed to handle the large input current. An improved voltage doubler configuration is adopted on the secondary side to make the output diodes sustain only half of the high output voltage. Furthermore, the output diode...
A novel isolated zero-voltage-switching (ZVS) bidirectional DC-DC converter with coupled inductors is proposed in this paper. The parallel structure in the low-voltage side and the series structure in the high-voltage side are adopted to satisfy the high power and high step-up/down conversion requirements. Moreover, by employing the PWM plus phase-shift (PPS) control technology, the current stress...
The relationship between the isolated transformer and the non-isolated autotransformer is discussed in this paper. Then a family of isolated and non-isolated interleaved Boost converters with winding-cross-coupled-inductors (WCCIs) is given and analyzed. The inherent relationship between the isolated and non-isolated DC/DC converters with WCCIs is explored. It can be drawn that only part of the energy...
A novel converter is proposed in this paper to satisfy the high power, high step-up and isolated conversion requirements. In the proposed converter, the input-parallel configuration is adopted to share the large input current and reduce the conduction losses, while the output-series configuration is adopted to get a high voltage gain. Consequently, a transformer with a low turns ratio can be applied,...
A high step-up converter with a coupled inductor and a switched capacitor is proposed in this paper. By using the coupled inductor, the voltage gain of the converter is extended and the voltage stress of the main switch is decreased to reduce the conduction losses. Moreover, the reverse-recovery problem of the output diode is alleviated by the leakage inductance. By using the switched capacitor, the...
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