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Analysis of the Contactless Power Transfer System Using Modeling and Analysis of the Contactless Transformer

Ryu Myung-Hyo    (Industry Application Research Division, Korea Electrotechnology Research Institute   ); Kim Jong-Hyun    (Industry Application Research Division, Korea Electrotechnology Research Institute   ); Baek Ju-Won    (Industry Application Research Division, Korea Electrotechnology Research Institute   ); Cha Hon-Nyong    (Electrical and computer Engineering, Michigan State University  );
  • 초록

    In this paper, the electrical characteristics of the contactless transformer is presented using the conventional coupled inductor theory. Compared with the conventional transformer, the contactless transformer has a large airgap, long primary wire and multi-secondary wire. As such, the contactless transformer has a large leakage inductance, small magnetizing inductance and poor coupling coefficient. Therefore, large magnetizing currents flow through the entire primary system due to small magnetizing inductance, resulting in low overall system efficiency. In high power applications, the contactless transformer is so bulky and heavy that it needs to be split by some light and small transformers. So, the contactless transformer needs several small transformer modules that are connected in series or parallel to transfer the primary power to the secondary one. This paper shows the analysis and measurement results of each contactless transformer module and comparison results between the series- and parallel-connection of the contactless transformer. The results are verified on the simulation based on the theoretical analysis and the 30kW experimental prototype.


  • 주제어

    Contactless Transformer .   Contactless Power Transfer System .   Coupled Inductor Theory.  

  • 참고문헌 (6)

    1. G. B. Joung, and B. H. Cho, 'An Energy Transmission System for an Artificial Heart Using Leakage Inductance Compensation of Transcutaneous Transformer', in IEEE Trans, PE, Vol. 13, 1998 
    2. Robert L. Steigerwald, 'A Comparison of Half-Bridge Resonant Converter Topologies,' IEEE Trans. Power Electronics, vol. 3, pp. 174-182, Apr. 1988 
    3. Don A. G. Pedder, Andrew D. Brown, J. Andrew Skinner, 'A Contactless Electrical Energy Transmission System', in IEEE Trans, industrial electronics, Vol. 46, No. 1, 1999 
    4. Yungtaek Jang and Mila M. Jovanovic, 'A Contactless Electrical Energy Transmission System for Portable- Telephone Battery Charger', in IEEE Trans, industrial electronics, Vol. 50, No. 3, 2003 
    5. Byungcho Choi, Jaehyun Noh, Honnyong Cha, Taeyoung Ahn and Seungwon Choi, 'Design and Implementation of Low-profile Contactless Battery Charger Using Planar Printed Circuit Board Windings as Energy Transfer Device,' IEEE Trans. Industrial Electronics, vol. 51, no. 1, pp. 7-10, Feb. 2004 
    6. A. Ghahary, and B. H. Cho, 'Design of a Transcutaneous Energy Transmission System Using a Series Resonant Converter', in IEEE Power Electronics Specialists Conf. Rec., pp. 1-8, 1990 

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