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This paper proposes new step-up DC-DC converters with high ratio capability. The proposed DC-DC converters are derived using combination of boost converters and buck-boost converters. A high ratio capability is achieved by parallel input and series output combination so that the efficiency is better than the one that is achieved by using a conventional boost converter. A method to reduce the input...
In high voltage gain application scenarios, diode-capacitor network can be used to achieve a relatively high voltage gain and at the same time reduce the demand of magnetic component, which considerably improves the efficiency and power density. In this article, the topology of a high step-up DC-DC converter based on multi-cell diode-capacitor network and coupling inductor is proposed to attain a...
In this paper, a non-isolated current fed boost dc-dc converter with coupled inductors is proposed. This converter achieves a high voltage gain ratio with zero-ripple input current. An active snubber circuit is employed to reduce the voltage spike of main switch generated by leakage inductance and realize zero voltage switching at turn-on. The circuit configuration, operation principle and design...
A new extended topology for DAB (dual active bridge) DC-DC converter is presented in this paper. The proposed converter is suitable for medium and high-power applications, however uses circuit elements with low power ratings. Bidirectional power flow, fewer numbers of switches without imposing any limitation on the transferred power rating and zero voltage switching (ZVS) are the main characteristics...
An interleaved reduced-component-count dc/dc converter is proposed for power management in fuel cell powered vehicles with a multivoltage electric net. The converter is based on a simplified topology and can handle more power with less ripple current, therefore reducing the capacitor requirements, making it more suited for fuel cell powered vehicles in the near future. A prototype rated at 4.3 kW...
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