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http://dx.doi.org/10.6113/TKPE.2011.16.3.293

A Bridgeless Half-Bridge AC-DC Converter with High-Efficiency  

Choi, Woo-Young (전북대 전자공학부)
Yoo, Ju-Seung (전북대 전자공학부)
Choi, Jae-Yeon (전북대 전자공학부)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.16, no.3, 2011 , pp. 293-301 More about this Journal
Abstract
This paper proposes a bridgeless half-bridge AC-DC converter with high-efficiency. The proposed converter integrates the bridgeless power factor correction (PFC) circuit with the asymmetrical pulse-width modulated (APWM) half-bridge DC-DC converter. It provides the isolated DC output voltage from the AC line voltage without using any full-bridge diode rectifier. Conduction losses are lowered with a simple circuit structure. Switching losses are also reduced by achieving zero-voltage switching (ZVS) of the power switches. By using series-connected two transformers, the proposed converter provides a low-profile and high power density for AC-DC converters. The performance of the proposed converter is verified from a 250 W (48 V / 5.2 A) experimental prototype circuit at $90 \;V_{rms}$ line voltage.
Keywords
Power factor correction (PFC); Half-bridge converter; Zero-voltage switching (ZVS); Bridgeless; Full-bridge diode rectifier;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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