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An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM

Author

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  • Xiaofeng Zhang

    (Harbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, China
    Beijing Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China)

  • Run Min

    (School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China)

  • Donglai Zhang

    (Harbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, China)

  • Yi Wang

    (Harbin Institute of Technology Shenzhen Graduate School; Shenzhen 518055, China)

Abstract

This paper presents an Optimized Sensorless Charge Balance (OSCB) controller based on a damped current model for flyback converter operating in Discontinuous Conduction Mode (DCM). By solving total differential equations of non-ideal transformer currents, the damped current model is derived with consideration of parasitics, leakage inductance of transformer, and the Resistor-Capacitor-Diode (RCD) snubber circuit. Based on the proposed model, current observation and control algorithms of the Sensorless Charge Balance (SCB) controller are optimized, which forms the OSCB control strategy. The average current damping is considered in the equivalent discrete-time small signal model. Furthermore, frequency analyses show that OSCB controller achieves higher closed-loop bandwidth and lower overshoot than a SCB controller, which indicates an improved transient performance. Finally, both OSCB and conventional SCB controllers are experimentally evaluated on a flyback converter prototype.

Suggested Citation

  • Xiaofeng Zhang & Run Min & Donglai Zhang & Yi Wang, 2018. "An Optimized Sensorless Charge Balance Controller Based on a Damped Current Model for Flyback Converter Operating in DCM," Energies, MDPI, vol. 11(12), pages 1-15, December.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3478-:d:190275
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    Citations

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    Cited by:

    1. Run Min & Dian Lyu & Shuai Cheng & Yingshui Sun & Linkai Li, 2019. "Linearized Discrete Charge Balance Control with Simplified Algorithm for DCM Buck Converter," Energies, MDPI, vol. 12(16), pages 1-17, August.
    2. Aaron Shmaryahu & Nissim Amar & Alexander Ivanov & Ilan Aharon, 2021. "Sizing Procedure for System Hybridization Based on Experimental Source Modeling for Electric Vehicles," Energies, MDPI, vol. 14(17), pages 1-21, August.
    3. Chia-Hsuan Wu & Guan-Rong Huang & Cheng-Chih Chou & Ching-Ming Lai & Liang-Rui Chen, 2021. "A Compensated Peak Current Mode Control PWM for Primary-Side Controlled Flyback Converters," Energies, MDPI, vol. 14(22), pages 1-12, November.

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