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Modeling and Analysis of a PCM-Controlled Boost Converter Designed to Operate in DCM

Author

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  • Teuvo Suntio

    (Laboratory of Electrical Energy Engineering, Tampere University of Technology, 33720 Tampere, Finland)

Abstract

Peak current-mode (PCM) control has been a very popular control method in power electronic converters. The small-signal modeling of the dynamics associated with PCM control has turned out to be extremely challenging. Most of the modeling attempts have been dedicated to the converters operating in continuous conduction mode (CCM) and just a few to the converters operating in discontinuous operation mode (DCM). The DCM modeling method published in 2001 was proven recently to be very accurate when applied to a buck converter. This paper provides the small-signal models for a boost converter and analyses for the first time its real dynamic behavior in DCM. The objectives of this paper are as follows: (i) to provide the full-order dynamic models for the DCM-operated PCM-controlled boost converter; (ii) to analyze the accuracy of the full and reduced-order dynamic models; and iii) to verify the validity of the high-frequency extension applied in the DCM-operated PCM-controlled buck converter in the case of the boost converter. It is also shown that the DCM-operated boost converter can operate only in even harmonic modes, similar to all the CCM-operated PCM-controlled converters. In the case of the DCM-operated PCM-controlled buck converter, its operation in the odd harmonic modes is the consequence of an unstable pole in its open-loop power-stage dynamics.

Suggested Citation

  • Teuvo Suntio, 2018. "Modeling and Analysis of a PCM-Controlled Boost Converter Designed to Operate in DCM," Energies, MDPI, vol. 12(1), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:12:y:2018:i:1:p:4-:d:192062
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    References listed on IDEAS

    as
    1. Mircea Gurbina & Aurel Ciresan & Dan Lascu & Septimiu Lica & Ioana-Monica Pop-Calimanu, 2018. "A New Exact Mathematical Approach for Studying Bifurcation in DCM Operated dc-dc Switching Converters," Energies, MDPI, vol. 11(3), pages 1-25, March.
    2. Teuvo Suntio, 2018. "Dynamic Modeling and Analysis of PCM-Controlled DCM-Operating Buck Converters—A Reexamination," Energies, MDPI, vol. 11(5), pages 1-18, May.
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