volume | PIER Journals

2016-08-12

A Comparative Study of Flux Cancellation Among Multiple Interconnected Modular Pads in Lumped IPT System

Chun Qiu,

Dr. Chun Qiu

Department of Electrical and Electronic Engineering

University of Hong Kong

China

Homepage

Kwok-Tong Chau,

Prof. Kwok-Tong Chau

EEE Department

University of Hong Kong

China

Homepage

Zhen Zhang,

Dr. Zhen Zhang

Department of Electrical and Electronic Engineering

University of Hong Kong

China

Homepage

Tze Wood Ching

Dr. Tze Wood Ching

Department of Electromechanical Engineering

University of Macau

China

Homepage

Progress In Electromagnetics Research M, Vol. 49, 131-140, 2016

doi:10.2528/PIERM16060703

Abstract

A lumped inductive power transfer system (IPT) with multiple modular pads differs from a stand-alone system. The magnetic coupling between adjacent modules is affected by the flux cancelation which further affects the power transmission. Thus, it is important to investigate the relationship between flux cancelation and system configuration. In this paper, the basic connection and operating mechanism for a modular IPT system are first discussed. Six cases are designed for two scenarios, including single and multiple secondary modules. Performances are compared in various primary excitation modes and secondary connection modes. Results show that the direction of canceled flux is determined by these modes. Matched modes will bring either a higher or a more stable coupling. And unmatched modes between primary and secondary sides tend to have the lowest coupling performance due to severe flux cancelation. Results provide a guidance for system design aiming at different power transfer characteristics.

Citation

Copy Export

Chun Qiu, Kwok-Tong Chau, Zhen Zhang, and Tze Wood Ching, "A Comparative Study of Flux Cancellation Among Multiple Interconnected Modular Pads in Lumped IPT System," Progress In Electromagnetics Research M, Vol. 49, 131-140, 2016.
doi:10.2528/PIERM16060703

References

1. Li, C. J. and H. Lin, "Investigation of wireless power transfer using planarized, capacitor-loaded coupled loops," Progress In Electromagnetics Research, Vol. 148, 223-231, 2014.
doi:10.2528/PIER14071705

2. Poon, A., "A general solution to wireless power transfer between two circular loops," Progress In Electromagnetics Research, Vol. 148, 171-182, 2014.
doi:10.2528/PIER14071201

3. Robichaud, A., M. Boudreault, and D. Deslandes, "Theoretical analysis of resonant wireless power transmission links composed of electrically small loops," Progress In Electromagnetics Research, Vol. 143, 485-501, 2013.
doi:10.2528/PIER13102306

4. Park, C., S. Lee, S. Y. Jeong, G. H. Cho, and C. T. Rim, "Uniform power I-type inductive power transfer system with DQ-power supply rails for on-line electric vehicles," IEEE Trans. Power Electron., Vol. 30, No. 11, 6446-6455, 2015.
doi:10.1109/TPEL.2015.2420372

5. Miller, J. M., P. T. Jones, J. M. Li, and O. C. Onar, "ORNL experience and challenges facing dynamic wireless power charging of EVs," IEEE Circuits Syst. Mag., Vol. 1, No. 2, 40-53, 2016.

6. Budhia, M., J. T. Boys, G. A. Covic, and C. Y. Huang, "Development of a single-sided flux magnetic coupler for electric vehicle IPT charging systems," IEEE Trans. Ind. Electron., Vol. 60, No. 1, 261-270, 2013.
doi:10.1109/TIE.2011.2179274

7. Nagendra, G., G. A. Covic, and J. T. Boys, "Determining the physical size of inductive couplers for IPT EV systems," IEEE J. Emerg. Sel. Topics Power Electron., Vol. 2, No. 3, 571-583, 2014.
doi:10.1109/JESTPE.2014.2302295

8. Qiu, C., K. T. Chau, C. Liu, W. Li, and F. Lin, "Quantitative comparison of dynamic flux distribution of magnetic couplers for roadway electric vehicle wireless charging system," J. Appl. Phys., Vol. 115, No. 17, 17A334, 2014.
doi:10.1063/1.4866882

9. Lin, F., G. A. Covic, and J. T. Boys, "Evaluation of magnetic pad sizes and topologies for electric vehicle charging," IEEE Trans. Power Electron., Vol. 30, No. 11, 6391-6407, 2015.
doi:10.1109/TPEL.2015.2419592

10. Qiu, C., K. T. Chau, C. Liu, T. W. Ching, and Z. Zhang, "Modular inductive power transmission system for high misalignment electric vehicle application," J. Appl. Phys., Vol. 117, No. 17, 17B528, 2015.
doi:10.1063/1.4918563