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Analysis and design of a single-stage three-level PFC AC-DC-converter

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2 Author(s)
Mehdi Narimani ; Department of Electrical and Computer Engineering, University of Western Ontario, London, Canada ; Gerry Moschopoulos

In this paper a new three-level single-stage power-factor-corrected ac/dc converter is presented. The proposed circuit integrates the operation of a boost power factor correction converter and a three-level dc/dc converter into one converter. It does not have the problem of high rising intermediate bus voltages at light load conditions that other single-stage converters have and can operate over a wider load range with significantly less output inductor current ripple; moreover, its input current has little distortion. In the paper, the operation of the new converter is explained in detail and analyzed, its steady-state characteristics are determined, and its design is discussed. Experimental results obtained from a prototype are presented to confirm the feasibility of the new converter.

Published in:

2012 Twenty-Seventh Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

Date of Conference:

5-9 Feb. 2012