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A Three-Coil Inductively Power Transfer System with Constant Voltage Output

Author

Listed:
  • Ruikun Mai

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Youyuan Zhang

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Ruimin Dai

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Yang Chen

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

  • Zhengyou He

    (School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China)

Abstract

For a traditional 2-coil system outputting constant voltage (CV), the transfer efficiency decreases drastically as transfer distance increases. To solve this problem, this essay proposes a 3-coil system which could achieve CV output and Zero Phase Angle (ZPA) conditions with specific parameter values. This 3-coil system could partly relief transfer efficiency fall at a long transfer distance, without any complicated controls. In order to achieve CV and ZPA condition, this essay devises the parameter values based on the decoupling 3-coil model, and a prototype is designed accordingly to verify these characteristics. With 10 cm transfer distance, output voltage deviation is 5.5% as the load varies from 12 Ω to 200 Ω, proving that the output voltage almost keeps constant with load change. Furthermore, with software simulation, a comparison experiment between the proposed 3-coil system and a Series-Inductor-Capacitor-Inductor (S-LCL) compensated 2-coil system is built to verify the efficiency improvement. The transfer distance change leads to the differentiation of voltage gain for both 2-coil and 3-coil systems. So, the input voltage for both systems and the compensated capacitor in receiver loop of the 3-coil system are manipulated for keeping 60 V output voltage on the 12 Ω load. With distance increasing from 10 cm to 20 cm, transfer efficiency varies from 92.61 to 48.9% for the 2-coil system, and from 92.89 to 84.26% for the 3-coil system, effectively proving the efficiency improvement. The experiment and simulation results prove the effectiveness of the proposed method.

Suggested Citation

  • Ruikun Mai & Youyuan Zhang & Ruimin Dai & Yang Chen & Zhengyou He, 2018. "A Three-Coil Inductively Power Transfer System with Constant Voltage Output," Energies, MDPI, vol. 11(3), pages 1-13, March.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:3:p:673-:d:136600
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    References listed on IDEAS

    as
    1. Guozhen Hu & Junkun Zhang & Junhua Wang & Zhijian Fang & Changsong Cai & Zhongzheng Lin, 2017. "Combination of Compensations and Multi-Parameter Coil for Efficiency Optimization of Inductive Power Transfer System," Energies, MDPI, vol. 10(12), pages 1-15, December.
    2. José Manuel González-González & Alicia Triviño-Cabrera & José Antonio Aguado, 2018. "Design and Validation of a Control Algorithm for a SAE J2954-Compliant Wireless Charger to Guarantee the Operational Electrical Constraints," Energies, MDPI, vol. 11(3), pages 1-17, March.
    3. Fei Lu & Hua Zhang & Chris Mi, 2017. "A Review on the Recent Development of Capacitive Wireless Power Transfer Technology," Energies, MDPI, vol. 10(11), pages 1-30, November.
    4. Yuan Liu & Aiguo Patrick Hu, 2018. "Study of Power Flow in an IPT System Based on Poynting Vector Analysis," Energies, MDPI, vol. 11(1), pages 1-12, January.
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    Cited by:

    1. Vladimir Kindl & Martin Zavrel & Pavel Drabek & Tomas Kavalir, 2018. "High Efficiency and Power Tracking Method for Wireless Charging System Based on Phase-Shift Control," Energies, MDPI, vol. 11(8), pages 1-19, August.

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