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Analysis of buck-boost converter inductor loss using a simple online B-H curve tracer

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4 Author(s)
Chung, H.Y. ; Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong ; Poon, F.N.K. ; Liu, C.P. ; Pong, M.H.

A simple method to plot online B-H curves and calculate the core loss of the inductor in a conventional buck-boost power converter is developed. In order to obtain a reliable loss data, measurement error and phase shift error are analyzed and then quantified. A new method to minimize measurement error is given. A new core loss model in terms of switching duty cycle is presented. This model predicts variation of core loss of an inductor operating in various conditions in a switching converter. This inductor model can be generalized to inductors in other switching converter topologies

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Applied Power Electronics Conference and Exposition, 2000. APEC 2000. Fifteenth Annual IEEE  (Volume:2 )

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