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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...
This paper proposes a new integrated magnetics (IM) ZVS full-bridge Dc-Dc converter, which integrates three inductors and one transformer with a single core. Compared with the discrete solution, the proposed integrated converter has less components, smaller size, lower cost and reduced core losses. The leakage inductance of the transformer is used as energy storage inductance and the output filter...
This paper proposes a push-pull forward three-level converter (PPF TL converter) for high-voltage fuel cell applications. It integrates the advantages of the TL converter and the PPF converter. It can operate at both three-level (3L) mode and two-level (2L) mode, so it is suitable for wide input voltage application, such as fuel cell power system. Half of the switches sustain half of the input voltage...
An interleaved boost converter with winding-coupled inductors is proposed in this paper to extend the voltage gain and to reduce the voltage stress of the switch compared with the conventional interleaved boost converter for high step-up distributed fuel cell generation system. Only one set of active clamp circuit is necessary for the interleaved two phases to recycle the leakage energy and to absorb...
The narrow turn-off period of the conventional boost converters limits their applications in high step-up DC-DC conversion. The voltage gain is extended without an extreme duty-cycle by the winding-coupled inductor structure. However, the leakage inductance induces large voltage spikes when the switch turns off. An active-clamp circuit is introduced here to clamp the switch turn-off voltage spikes...
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