A New High Efficiency PWM Single-Switch Isolated Converter

Ki-Bum Park; Chong-Eun Kim; Gun-Woo Moon; Myung-Joong Youn

A New High Efficiency PWM Single-Switch Isolated Converter

Vol. 7, No. 4, pp. 301-309, Oct. 2007

10.6113/JPE.2007.7.4.301

isolated converter

single-switch

Flyback converter

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Abstract

The flyback converter is one of the most attractive isolated converters in small power applications because of its simple structure. However, it suffers from high device stress, large transformer size, and high voltage stress across its switch and diode. To solve these problems a new cost-effective PWM single-switch isolated converter is proposed. The proposed converter has no output filter inductor, reduced voltage stress on the secondary devices, and reduced transformer size. Moreover, the switch turn-off loss is reduced and no dissipative snubber across the secondary diode is required. Therefore, it features a simple structure, a low cost, and high efficiency. The operational principle and characteristics of the proposed converter are presented and compared with the flyback converter and then verified experimentally.

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Cite this article

[IEEE Style]

K. Park, C. Kim, G. Moon, M. Youn, "A New High Efficiency PWM Single-Switch Isolated Converter," Journal of Power Electronics, vol. 7, no. 4, pp. 301-309, 2007. DOI: 10.6113/JPE.2007.7.4.301.

[ACM Style]

Ki-Bum Park, Chong-Eun Kim, Gun-Woo Moon, and Myung-Joong Youn. 2007. A New High Efficiency PWM Single-Switch Isolated Converter. Journal of Power Electronics, 7, 4, (2007), 301-309. DOI: 10.6113/JPE.2007.7.4.301.