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A Novel Step-up AC-DC Converter with PFC by Discontinuous Current Control  

Kim, Choon-Sam (강원대 제어계측공학과)
Shim, Jae-Sun (강원대 전기공학과)
Kim, Chun-Sik (경남대 산업협력단 사업지원실)
Lee, Hyun-Woo (경남대 전자전기공학부)
Kwak, Dong-Kurl (한중대 전기전자공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.11, no.2, 2006 , pp. 142-148 More about this Journal
Abstract
In this paper, authors propose a novel step-up AC-DC converter operated with power factor correction (PFC) and with high efficiency. The proposed converter behaves with discontinuous current control (DCC) of input current. The input current waveform in the proposed converter is got to be a discontinuous sinusoid form in proportion to magnitude of at input voltage under the constant duty cycle switching. Therefore, the input power factor is nearly unity and the control method is simple. In the general DCC converters, the switching devices are turned-on with the zero current switching (ZCS). But turn-off of the switching devices is done at the maximum current. To achieve a soft switching at turn-off, the proposed converter uses a new partial resonant circuit, which results in the very low switching loss and the high efficiency of converter.
Keywords
Step-up converter; Power factor correction; Discontinuous current control; Soft switching; Partial resonant circuit;
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  • Reference
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