Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Multi-channel inductive power transfer system based on ISOP topology

  • Qijun Deng (School of Electrical Engineering and Automation, Wuhan University) ;
  • Lixian Wang (School of Electrical Engineering and Automation, Wuhan University) ;
  • Peng Luo (School of Electrical Engineering and Automation, Wuhan University) ;
  • Dariusz Czarkowski (Department of Electrical and Computer Engineering, New York University Tandon School of Engineering) ;
  • Wenshan Hu (School of Electrical Engineering and Automation, Wuhan University)
  • Received : 2023.06.16
  • Accepted : 2023.11.20
  • Published : 2024.03.20
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Abstract

With the expansion of mid-voltage DC distribution, inductive power transfer (IPT) systems supplied directly by DC distribution with a high input voltage become a possibility. A high input voltage leads to an enhanced power transfer level and low losses with the DC bus under a certain power transmission. However, the ultra-high input voltage of single-channel IPT is impossible because of the limits on the voltage/current ratings of converter components. Thus, a multi-channel IPT system based on an input-series output-parallel (ISOP) topology is proposed. Parameter differences among various channels result in an unbalanced input voltage for series inverters, which affects the system's operation stability and life. A leader-follower control strategy is proposed to implement input voltage sharing and output load voltage tracking for the proposed ISOP-based IPT system. One of the inverters serves as the lead control unit to keep the output voltage constant, while the remaining inverters function as followers that trace the input DC voltage of the main channel to implement voltage sharing among the inverters. A three-channel ISOP-based IPT prototype is constructed to verify the effectiveness of the control strategy. Experimental results show that the input voltage sharing and constant output voltage are both achieved under the designed controller.

Keywords

Acknowledgement

This work was supported in part by the National Natural Science Foundation of China under Grant 51977151, and in part by the Fundamental Research Funds for the Central Universities under Grant 2042021gf0011.

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