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http://dx.doi.org/10.6113/TKPE.2014.19.1.23

Single Power-conversion AC-DC Converter with High Power Factor  

Cho, Yong-Won (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology)
Park, Chun-Yoon (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology)
Kwon, Bong-Hwan (Dept. of Electronic and Electrical Eng., Pohang Univ. of science and technology)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.19, no.1, 2014 , pp. 23-30 More about this Journal
Abstract
This paper proposes a single power-conversion ac-dc converter with a dc-link capacitor-less and high power factor. The proposed converter is derived by integrating a full-bridge diode rectifier and a series-resonant active-clamp dc-dc converter. To obtain a high power factor without a power factor correction circuit, this paper proposes a suitable control algorithm for the proposed converter. The proposed converter provides single power-conversion by using the proposed control algorithm for both power factor correction and output control. Also, the active-clamp circuit clamps the surge voltage of switches and recycles the energy stored in the leakage inductance of the transformer. Moreover, it provides zero-voltage turn-on switching of the switches. Also, a series-resonant circuit of the output-voltage doubler removes the reverse-recovery problem of the output diodes. The proposed converter provides maximum power factor of 0.995 and maximum efficiency of 95.1% at the full-load. The operation principle of the converter is analyzed and verified. Experimental results for a 400W ac-dc converter at a constant switching frequency of 50kHz are obtained to show the performance of the proposed converter.
Keywords
single power-conversion; active-clamp circuit; series-resonant circuit;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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