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Nonlinear behavior of wireless power transfer systems: modeling, analysis, and experimental verification

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Abstract

Wireless power transfer (WPT) systems typically consist of multiple cascaded power converters with their own operating modes. This paper proposes a cascaded modeling method, which segments the complex structure of the whole system into a number of power converter units (PCUs). For each PCU, a state-space model is constructed with the preceding PCU’s output voltage as its input voltage, and the succeeding PCU’s input impedance as its equivalent load. A regressive algorithm is developed to evaluate the full dynamic responses of the whole system using these PCU models. To illustrate the effectiveness of the proposed cascaded modeling method, a buck converter with a series connected inverter of a two-PCU WPT system is analyzed as an example. Both simulation and experiment results are used to verify the proposed modeling method. The proposed method significantly simplifies the modeling process of cascaded power electronic systems and achieves excellent accuracy for analyzing the nonlinear bifurcation behaviors.

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Funding

This work was supported in part by the National Natural Science Foundation of China under Grant 52,007,012, 51,977,178, in part by the Fundamental Research Funds for the Central Universities under Grant 2020CDJYGZDH005.

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Authors and Affiliations

  1. School of Electrical Engineering and Electronic Information, Xihua University, Chengdu, 610039, China

    Yanling Li

  2. College of Automation, Chongqing University, Chongqing, 400044, China

    Xiaofei Li & Xin Dai

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  1. Yanling Li
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  2. Xiaofei Li
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  3. Xin Dai
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Correspondence to Xiaofei Li.

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Li, Y., Li, X. & Dai, X. Nonlinear behavior of wireless power transfer systems: modeling, analysis, and experimental verification. Electr Eng 104, 1219–1227 (2022). https://doi.org/10.1007/s00202-021-01379-2

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  • DOI: https://doi.org/10.1007/s00202-021-01379-2

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