Proceedings Article10.1109/IECON.2004.1433412
High-efficiency DC-DC converter with high voltage gain and reduced switch stress
Rong-Jong Wai,Chung-You Lin,Rou-Yong Duan +2 more
- 02 Nov 2004
- Vol. 1, Iss: 1, pp 773-778
281
TL;DR: In this article, a three-winding coupled inductor is used for providing a high voltage gain without extreme switch duty-cycle and enhancing the utility rate of magnetic core, which can achieve the aim of high-efficiency power conversion.
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Abstract: In this study, a high-efficiency DC-DC converter with high voltage gain and reduced switch stress is proposed. In the proposed topology, a three-winding coupled inductor is used for providing a high voltage gain without extreme switch duty-cycle and enhancing the utility rate of magnetic core. Moreover, the energy in the leakage inductor is released directly to the output terminal for avoiding the phenomenon of circulating current and the production of switch surge voltage. In addition, the delay time formed with the cross of primary and secondary currents of the coupled inductor is manipulated to alleviate the reverse-recovery current of the output diode. It can achieve the aim of high-efficiency power conversion. Furthermore, the closed-loop control methodology is utilized in the proposed scheme to overcome the voltage drift problem of the power source under the variation of loads. Some experimental results via an example of a proton exchange membrane fuel cell (PEMFC) power source with 250 watts nominal rating are given to demonstrate the effectiveness of the proposed power conversion strategy.
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Citations
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A High Step-Up DC-DC Converter Based on Three-State Switching Cell
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- 09 Jul 2006
TL;DR: An important feature of this non-isolated boost converter is the lower blocking voltage across the controlled switches compared to similar circuits, which allows the utilization of MOSFETs switches with lower conduction resistances RDS(on).
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Hybrid Electric Vehicle Power Management Solutions Based on Isolated and Nonisolated Configurations of Multilevel Modular Capacitor-Clamped Converter
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TL;DR: In this paper, the authors present a simulation of power switch-mode converters for zero-voltage and/or zero-current switchings in power electronic converters and systems.
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High-efficiency, high step-up DC-DC converters
Qun Zhao,Fred C. Lee +1 more
TL;DR: In this article, a family of high-efficiency, high step-up DC-DC converters with simple topologies is proposed, which use diodes and coupled windings instead of active switches to realize functions similar to those of active clamps.
Fuel cell systems: efficient, flexible energy conversion for the 21st century
Michael W. Ellis,M. R. von Spakovsky,Douglas J. Nelson +2 more
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TL;DR: Promising applications for fuel cells include portable power, transportation, building cogeneration, and distributed power for utilities, which appear poised to meet the power needs of a variety of applications.
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Step-up switching-mode converter with high voltage gain using a switched-capacitor circuit
TL;DR: In this paper, a switch-capacitor (SC) circuit is integrated within a boost converter for a steep step-up of the line voltage, allowing for a boost of the input voltage to high values.
479