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Inverse-System Decoupling Control of DC/DC Converters

Author

Listed:
  • Yimin Lu

    (College of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Haimeng Zhu

    (College of Electrical Engineering, Guangxi University, Nanning 530004, China)

  • Xianfeng Huang

    (College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China)

  • Robert D. Lorenz

    (Department of Mechanical Engineering WEMPEC, University of Wisconsin-Madison, Madison, WI 53706, USA)

Abstract

Existing large-signal control schemes for DC/DC converters formulate control strategies based primarily on nonlinear control theory, and the associated design and implementation are relatively complex. In this work, a decomposition modeling and inverse-system decoupling control method is proposed for DC/DC converters that operate under large-signal disturbances. First, a large-signal circuit-averaged model for DC/DC converters is established. The proposed control system has a double closed-loop control structure composed of a voltage loop and a current loop. Then, the voltage-loop and current-loop controlled subsystems are decoupled and compensated to first-order integral elements using the inverse system method. Several linear feedback controllers are designed for first-order integral systems under various optimization criteria using the optimal control theory. Simulation and experiment were performed on buck–boost converters with resistive and constant power loads. The results show that under the control of the proposed controller, all systems exhibited excellent dynamic and steady-state performance. The proposed method allows the disturbance control of the DC/DC converter, the dynamic behavior control of the voltage loop, and the current loop to become independent processes. The local controller design follows the classical linear control design method and is a simple and effective large-signal control strategy.

Suggested Citation

  • Yimin Lu & Haimeng Zhu & Xianfeng Huang & Robert D. Lorenz, 2019. "Inverse-System Decoupling Control of DC/DC Converters," Energies, MDPI, vol. 12(1), pages 1-19, January.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:1:p:179-:d:195388
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    References listed on IDEAS

    as
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    4. Sivaprasad Athikkal & Kumaravel Sundaramoorthy & Ashok Sankar, 2017. "Design, Fabrication and Performance Analysis of a Two Input—Single Output DC-DC Converter," Energies, MDPI, vol. 10(9), pages 1-18, September.
    5. Arthur H. R. Rosa & Thiago M. De Souza & Lenin M. F. Morais & Seleme I. Seleme, 2018. "Adaptive and Nonlinear Control Techniques Applied to SEPIC Converter in DC-DC, PFC, CCM and DCM Modes Using HIL Simulation," Energies, MDPI, vol. 11(3), pages 1-22, March.
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