Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Modeling and Design of Zero-Voltage-Switching Controller for Wireless Power Transfer Systems Based on Closed-Loop Dominant Pole

  • Chen, Cheng (School of Electrical Engineering and Automation, Wuhan University) ;
  • Zhou, Hong (School of Electrical Engineering and Automation, Wuhan University) ;
  • Deng, Qijun (Shenzhen Research Institute, Wuhan University) ;
  • Hu, Wenshan (School of Electrical Engineering and Automation, Wuhan University) ;
  • Yu, Yanjuan (School of Electrical Engineering and Automation, Wuhan University) ;
  • Lu, Xiaoqing (School of Electrical Engineering and Automation, Wuhan University) ;
  • Lai, Jingang (E.ON Energy Research Center, RWTH Aachen University)
  • Received : 2018.10.19
  • Accepted : 2019.05.29
  • Published : 2019.09.20
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Abstract

Zero-Voltage-Switching (ZVS) operation for a Wireless Power Transfer (WPT) system can be achieved by designing a ZVS controller. However, the performance of the controller in some industrial applications needs to be designed tightly. This paper introduces a ZVS controller design method for WPT systems. The parameters of the controller are designed according to the desired performance based on the closed loop dominant pole placement method. To describe the dynamic characteristics of the system ZVS angle, a nonlinear dynamic model is deduced and linearized using the small signal linearization method. By analyzing the zero-pole distribution, a low-order equivalent model that facilitates the controller design is obtained. The parameters of the controller are designed by calculating the time constant of the closed-loop dominant poles. A prototype of a WPT system with the designed controller and a five-stage multistage series variable capacitor (MSVC) is built and tested to verify the performance of the controller. The recorded response curves and waveforms show that the designed controller can maintain the ZVS angle at the reference angle with satisfactory control performance.

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References

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