A Single-Stage AC/DC Converter with Low Voltage Stresses and Reduced Switching Losses

Kyu-Tae Kim; Woo-Young Choi; Jung-Min Kwon; Bong-Hwan Kwon

A Single-Stage AC/DC Converter with Low Voltage Stresses and Reduced Switching Losses

Vol. 9, No. 6, pp. 823-834, Nov. 2009

10.6113/JPE.2009.9.6.823

Single-stage

Power factor correction (PFC)

Variable frequency

Reverse-recovery

Power Efficiency

PDF

Abstract

This paper proposes a high-efficiency single-stage ac/dc converter. The proposed converter features low voltage stresses and reduced switching losses. It operates at the boundary of discontinuous- and continuous-conduction modes by employing variable switching frequency control. The turn-on switching loss of the switch can be reduced by turning it on when the voltage across it is at a minimum. The voltage across the bulk capacitor is independent of the output loads and maintained within the practical range for the universal line input, so the problem of high voltage stress across the bulk capacitor is alleviated. Moreover, the voltage stress of the output diodes is clamped to the output voltage, and the output diodes are turned off at zero-current. Thus, the reverse-recovery related losses of the output diodes are eliminated. The operational principles and circuit analysis are presented. A prototype circuit was built and tested for a 150 W (50 V / 3 A) output power. The experimental results verify the performance of the proposed converter.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

K. Kim, W. Choi, J. Kwon, B. Kwon, "A Single-Stage AC/DC Converter with Low Voltage Stresses and Reduced Switching Losses," Journal of Power Electronics, vol. 9, no. 6, pp. 823-834, 2009. DOI: 10.6113/JPE.2009.9.6.823.

[ACM Style]

Kyu-Tae Kim, Woo-Young Choi, Jung-Min Kwon, and Bong-Hwan Kwon. 2009. A Single-Stage AC/DC Converter with Low Voltage Stresses and Reduced Switching Losses. Journal of Power Electronics, 9, 6, (2009), 823-834. DOI: 10.6113/JPE.2009.9.6.823.