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Design considerations for a novel single-stage AC-DC PWM full-bridge converter

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2 Author(s)
Shumin Li ; Dept. of Electr. & Comput. Eng., Univ. of Western Ontario, London, Ont., Canada ; G. Moschopoulos

A new AC-DC single-stage PWM full-bridge converter is proposed in this paper. The converter uses an auxiliary transformer winding to keep the voltage across the primary-side DC bus below 450 V over a universal line and wide load range. In this paper, the fundamental operating principles of the proposed converter are discussed, and a mathematical analysis of the converter is then performed. The analysis is used to derive graphs of steady-state characteristic curves that can be used to form the basis of a design procedure. The procedure can be used to select the values of key converter components, and is demonstrated with an example showing the design of a 48 Vdc, 500 W power supply. Experimental results obtained on a laboratory prototype are presented to confirm the concepts presented in this paper.

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Applied Power Electronics Conference and Exposition, 2004. APEC '04. Nineteenth Annual IEEE  (Volume:2 )

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