An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

Quanming Luo; Yang Zhang; Pengju Sun; Luowei Zhou

An Active Clamp High Step-Up Boost Converter with a Coupled Inductor

Vol. 15, No. 1, pp. 86-95, Jan. 2015

10.6113/JPE.2015.15.1.86

Active clamp

Coupled inductor

High step-up

Zero-voltage-switching

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Abstract

An active clamp high step-up boost converter with a coupled inductor is proposed in this paper. In the proposed strategy, acoupled inductor is adopted to achieve a high voltage gain. The clamp circuit is included to achieve the zero-voltage-switching(ZVS) condition for both the main and clamp switches. A rectifier composed of a capacitor and a diode is added to reduce thevoltage stress of the output rectifier diode. As a result, diodes with a low reverse-recovery time and forward voltage-drop can beutilized. Since the voltage stresses of the main and clamp switches are far below the output voltage, low-voltage-rated MOSFETscan be adopted to reduce conduction losses. Moreover, the reverse-recovery losses of the diodes are reduced due to the inherentleakage inductance of the coupled inductor. Therefore, high efficiency can be expected. Firstly, the derivation of the proposedconverter is given and the operation analysis is described. Then, a steady-state performance analysis of the proposed converter isanalyzed in detail. Finally, a 250 W prototype is built to verify the analysis. The measured maximum efficiency of the prototype is95%.

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Cite this article

[IEEE Style]

Q. Luo, Y. Zhang, P. Sun, L. Zhou, "An Active Clamp High Step-Up Boost Converter with a Coupled Inductor," Journal of Power Electronics, vol. 15, no. 1, pp. 86-95, 2015. DOI: 10.6113/JPE.2015.15.1.86.

[ACM Style]

Quanming Luo, Yang Zhang, Pengju Sun, and Luowei Zhou. 2015. An Active Clamp High Step-Up Boost Converter with a Coupled Inductor. Journal of Power Electronics, 15, 1, (2015), 86-95. DOI: 10.6113/JPE.2015.15.1.86.