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

Ahmed Aboushady, Khaled Ahmed, Stephen Finney, Barry Williams

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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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.
Original languageEnglish
Title of host publication2010 IEEE Energy Conversion Congress and Exposition (ECCE)
Number of pages6
ISBN (Print)978-1-4244-5286-6
Publication statusPublished - 2010


  • converters
  • transfer functions
  • phase modulation
  • trajectory
  • steady-state
  • analytical models
  • inverters


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