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Discrete time domain small-signal modeling of full-bridge phase-shifted series resonant converter

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4 Author(s)
Aboushady, A.A. ; Dept. of Electron. & Electr. Eng., Strathclyde Univ., Glasgow, UK ; Ahmed, K.H. ; Finney, S.J. ; Williams, B.W.

This paper provides an analytical discrete small-signal state-space model of the phase-shift modulated series resonant converter used to obtain an explicit linearized phase-shift to output voltage transfer function. This transfer function is useful for linear closed loop control design. Initially, the effective duty-ratio to output voltage transfer function is derived. It is then proven, analytically and through results, that it is linearly related to the phase-shift to output voltage which is the main research concern. The analysis is carried out using state-plane diagrams. Small-signal state-space model representation is derived which is used for closed loop controller gain calculations. Results validate the calculated control gains based on the proposed linearized model.

Published in:

Energy Conversion Congress and Exposition (ECCE), 2010 IEEE

Date of Conference:

12-16 Sept. 2010