Coils and Compensation Circuit Design Reduces Power Pulsation and Optimizes Transfer Efficiency in the Dynamic Wireless Charging System for Electric Vehicles
Main Article Content
Abstract
This paper presents a method for designing coils and compensation circuits to reduce output power pulsation and maximize transfer efficiency in a dynamic wireless charging system for electric vehicles. The transmission lane is designed in short-track and is modularized. Each module has three short-track transmitter coils that are placed closely together along the moving track of the receiver and connected to a single-phase bridge inverter. The designs of the transmitting and receiving coils are analyzed by finite element analysis to reduce the variation of the coupling coefficient. And then the coupling coefficient is analyzed to identify the characteristics of the transmission lane. The double-sided LCC compensation circuit is designed according to the optimum load value to obtain maximum transfer efficiency. The SIC devices are used to improve the efficiency of the 85 kHz resonant inverter. A 1.5 kW dynamic wireless charging system prototype is built. Experimental results show that the average system efficiency is obtained at 89.5%, and the output power pulse rate is ±9.5% in the dynamic charging process. Moreover, design results are compared with other similar designs that have been performed to demonstrate the benefits of the proposed design system.
Keywords
Dynamic wireless charging, coils design, LCC compensation circuit, maximize transfer efficiency
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
References
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[9] V.-B. Vu, D.-H. Tran, W. Choi, Implementation of the constant current and constant voltage charge of inductive power transfer systems with the double-sided LCC compensation topology for electric vehicle battery charge applications, IEEE Trans. Power Electron., vol. 33, no. 9, pp. 7398–7410, Sep. 2018. https://doi.org/10.1109/TPEL.2017.2766605
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[11] A. Berger, M. Agostinelli, S. Vesti, J. A. Oliver, J. A. Cobos, M. Huemer, A wireless charging system applying phase-shift and amplitude control to maximize efficiency and extractable power, IEEE Trans. Power Electron., vol. 30, no. 11, pp. 6338–6348, Nov. 2015. https://doi.org/10.1109/TPEL.2015.2410216
[12] W. X. Zhong, S. Y. Hui, Maximum energy efficiency tracking for wireless power transfer systems, Power Electron. IEEE Trans. On, vol. 30, pp. 4025–4034, Jul. 2015. https://doi.org/10.1109/TPEL.2014.2351496
[2] S. Chopra, P. Bauer, Driving range extension of EV with on-road contactless power transfer - a case study, IEEE Trans. Ind. Electron., vol. 60, no. 1, pp. 329–338, Jan. 2013. https://doi.org/10.1109/TIE.2011.2182015
[3] J. M. Miller, P. T. Jones, J.-M. Li, O. C. Onar, ORNL experience and challenges facing dynamic wireless power charging of EV’s, IEEE Circuits Syst. Mag., vol. 15, no. 2, pp. 40–53, 2015. https://doi.org/10.1109/MCAS.2015.2419012
[4] Y. Guo, L. Wang, Q. Zhu, C. Liao, F. Li, Switch-On Modeling and Analysis of dynamic wireless charging system used for electric vehicles, IEEE Trans. Ind. Electron., vol. 63, no. 10, pp. 6568–6579, Oct. 2016. https://doi.org/10.1109/TIE.2016.2557302
[5] Q. Zhu, L. Wang, Y. Guo, C. Liao, F. Li, Applying LCC compensation network to dynamic wireless EV charging system, IEEE Trans. Ind. Electron., vol. 63, no. 10, pp. 6557–6567, Oct. 2016. https://doi.org/10.1109/TIE.2016.2529561
[6] F. Lu, H. Zhang, H. Hofmann, C. C. Mi, A dynamic charging system with reduced output power pulsation for electric vehicles, IEEE Trans. Ind. Electron., vol. 63, no. 10, pp. 6580–6590, Oct. 2016. https://doi.org/10.1109/TIE.2016.2563380
[7] C.-S. Wang, O. H. Stielau, G. A. Covic, Design considerations for a contactless electric vehicle battery charger, IEEE Trans. Ind. Electron., vol. 52, no. 5, pp. 1308–1314, Oct. 2005. https://doi.org/10.1109/TIE.2005.855672
[8] S. Li, W. Li, J. Deng, T. D. Nguyen, C. C. Mi, A double-sided LCC compensation network and its tuning method for wireless power transfer, IEEE Trans. Veh. Technol., vol. 64, no. 6, pp. 2261–2273, Jun. 2015. https://doi.org/10.1109/TVT.2014.2347006
[9] V.-B. Vu, D.-H. Tran, W. Choi, Implementation of the constant current and constant voltage charge of inductive power transfer systems with the double-sided LCC compensation topology for electric vehicle battery charge applications, IEEE Trans. Power Electron., vol. 33, no. 9, pp. 7398–7410, Sep. 2018. https://doi.org/10.1109/TPEL.2017.2766605
[10] S. Li, C. C. Mi, Wireless power transfer for electric vehicle applications, IEEE J. Emerg. Sel. Top. Power Electron., vol. 3, no. 1, pp. 4–17, Mar. 2015. https://doi.org/10.1109/JESTPE.2014.2319453
[11] A. Berger, M. Agostinelli, S. Vesti, J. A. Oliver, J. A. Cobos, M. Huemer, A wireless charging system applying phase-shift and amplitude control to maximize efficiency and extractable power, IEEE Trans. Power Electron., vol. 30, no. 11, pp. 6338–6348, Nov. 2015. https://doi.org/10.1109/TPEL.2015.2410216
[12] W. X. Zhong, S. Y. Hui, Maximum energy efficiency tracking for wireless power transfer systems, Power Electron. IEEE Trans. On, vol. 30, pp. 4025–4034, Jul. 2015. https://doi.org/10.1109/TPEL.2014.2351496