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Small-signal analysis of multiphase interleaved boost converter with coupled inductors

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5 Author(s)
Shin, H.-B. ; Div. of Electr. & Electron. Eng., Gyeongsang Nat. Univ., Gyeongnam, South Korea ; Jang, E.-S. ; Park, J.-G. ; Lee, H.W.
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The small-signal analysis of the multiphase interleaved boost converter with coupled inductors operated in the continuous inductor current mode is addressed. It is very difficult to design a dynamic feedback controller when the converter phase is expanded since there are no general and compact expressions for the small-signal analysis for various inductor couplings. Analytical and concise frequency models are derived and the dynamic characteristics investigated according to the inductor couplings and the number of phases. The small-signal analysis is verified experimentally. The proposed frequency models will be very useful to design the dynamic controllers of the multiphase interleaved boost converters.

Published in:

Electric Power Applications, IEE Proceedings -  (Volume:152 ,  Issue: 5 )