Class D series resonant inverter with a series capacitor and an auxiliary switch satisfying sub-optimum class E switching condition

M. Takegata, Y. Echizen, Hirotaka Koizumi

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

3 Citations (Scopus)

Abstract

This paper presents a class D series resonant inverter with a series capacitor and an auxiliary switch. A capacitor and a switch connected in parallel are added to the series resonant circuit in series, which regulates the output power without frequency modulation. The entire impedance is changed by the difference between the switching frequency and the two resonant frequencies. While the auxiliary switch is on, the switching frequency is equal to the resonant frequency of a series circuit composed of a resistor R, an inductor L and a capacitor C. While the auxiliary switch is off, the switching frequency is equal to the resonant frequency of a series circuit composed of R, L, C and an additional capacitor. Applying the sub-optimum class E switching condition to the auxiliary switch, high power conversion efficiency is maintained. State equations are solved with MATLAB for each state. The calculated waveforms were agreed with the simulation results and experiment results. The maximum measured power conversion efficiency was 90.2% at 200 kHz.

Original languageEnglish
Title of host publication2009 International Conference on Power Electronics and Drive Systems, PEDS 2009
Pages734-739
Number of pages6
DOIs
Publication statusPublished - 1 Dec 2009
Event2009 International Conference on Power Electronics and Drive Systems, PEDS 2009 - Taipei, Taiwan, Province of China
Duration: 2 Jan 20095 Jan 2009

Publication series

NameProceedings of the International Conference on Power Electronics and Drive Systems

Conference

Conference2009 International Conference on Power Electronics and Drive Systems, PEDS 2009
CountryTaiwan, Province of China
CityTaipei
Period2/01/095/01/09

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Keywords

  • Class D
  • Class E
  • Resonant inverter
  • ZVS

Cite this

Takegata, M., Echizen, Y., & Koizumi, H. (2009). Class D series resonant inverter with a series capacitor and an auxiliary switch satisfying sub-optimum class E switching condition. In 2009 International Conference on Power Electronics and Drive Systems, PEDS 2009 (pp. 734-739). [5385857] (Proceedings of the International Conference on Power Electronics and Drive Systems). https://doi.org/10.1109/PEDS.2009.5385857