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Effect of Valley Switching and Switching-Frequency Limitation on Line-Current Distortions of DCM/CCM Boundary Boost PFC Converters

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3 Author(s)
Huber, L. ; Power Electron. Lab., Delta Products Corp., Research Triangle Park, NC ; Irving, B.T. ; Jovanovic, M.M.

A systematic analysis of line-current distortions of the discontinuous-conduction-mode and the continuous-conduction-mode boundary boost power factor correction converter due to valley switching (VS) and switching-frequency limitation, where VS is either maintained or lost after the onset of switching-frequency limitation, is provided. Closed-form expressions for the line current are derived. It is shown that if the switching frequency is limited and VS is not maintained, the line current is more distorted with voltage-mode control than with current-mode control. The effects of line-current distortions are demonstrated with both simulation and experimental results.

Published in:

Power Electronics, IEEE Transactions on  (Volume:24 ,  Issue: 2 )