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A describing function for resonantly commutated H-bridge inverters

By H I Sewell, D A Stone and Chris Bingham


Abstract—The paper presents the derivation of a describing function to model the dynamic behavior of a metal oxide semiconductor field effect transistor-based, capacitively commutated H-bridge, including a comprehensive explanation of the various stages in the switching cycle. Expressions to model the resulting input current, are also given. The derived model allows the inverter to be accurately modeled within a control system simulation over a number of utility input voltage cycles, without resorting to computationally\ud intensive switching-cycle level, time-domain SPICE simulations. Experimental measurements from a prototype H-bridge inverter employed in an induction heating application, are used to demonstrate a high degree of prediction accuracy over a large variation of load conditions is possible using the simplified model

Topics: H610 Electronic Engineering
Publisher: Institution of Electronic and Electrical Engineers POWER ELECTRONICS SOCIETY
Year: 2004
DOI identifier: 10.1109/TPEL.2004.830081
OAI identifier:

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  4. (1995). Contribution to the AC-analysis of resonant converters; analysis of the series-parallel resonant converter including effects of parasitics and lossless snubber for optimized design,” in doi
  5. (1998). He remained with Cranfield University as a PostDoctoral Researcher, until subsequently taking up a research position at the University of Sheffield. Since
  6. (1996). Sewell received the M.Eng. degree in from the
  7. (1995). Soft switching series resonant converter for induction heating applications,” in doi
  8. (1984). Stone received the B.Eng. degree in electronic engineering from the University of Sheffield,

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