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To achieve high power wireless power transfer, a multi-channel inductive power transfer (IPT) system with input-parallel output-series (IPOS) configuration is proposed in this article. The modular design of this system significantly reduces power losses during high-voltage transmission. Meanwhile, the number of channels can be flexibly adjusted according to voltage and power requirements in practical applications, thereby enhancing system adaptability and scalability. First, the power transfer characteristics of the multi-channel IPOS IPT system under different compensation networks are analyzed, demonstrating that the IPOS system is more suitable for constant voltage (CV) compensation networks. Then, to address potential voltage imbalance caused by parameter mismatches, a voltage sharing strategy based on primary coil current detection is proposed. This method enables output voltage regulation without requiring communication between the primary and secondary sides. Finally, the validity of the theoretical analysis is verified through a two-channel IPOS-IPT system.

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Input-Parallel Output-Series IPT System Based on Voltage-Sharing Phase-Shift Control Identified by Primary Coil Current

  • 会议论文

  • 发表日期：

    2026年

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  • Yuan Sui,
  • Weiyao Mei,
  • Tongzhao Li,
  • Qing Li,
  • Lei Wang,
  • Lijun Diao

摘要

To achieve high power wireless power transfer, a multi-channel inductive power transfer (IPT) system with input-parallel output-series (IPOS) configuration is proposed in this article. The modular design of this system significantly reduces power losses during high-voltage transmission. Meanwhile, the number of channels can be flexibly adjusted according to voltage and power requirements in practical applications, thereby enhancing system adaptability and scalability. First, the power transfer characteristics of the multi-channel IPOS IPT system under different compensation networks are analyzed, demonstrating that the IPOS system is more suitable for constant voltage (CV) compensation networks. Then, to address potential voltage imbalance caused by parameter mismatches, a voltage sharing strategy based on primary coil current detection is proposed. This method enables output voltage regulation without requiring communication between the primary and secondary sides. Finally, the validity of the theoretical analysis is verified through a two-channel IPOS-IPT system.