LC/CL compensation topology and efficiency-based optimisation method for wireless power transfer

LC/CL compensation topology and efficiency-based optimisation method for wireless power transfer

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Wireless power transfer (WPT) has attracted a large amount of attention due to its inherent advantages such as convenience, safety, low maintenance, weather proof and so on. Compensation topology is crucial for WPT system due to its function of reducing reactive power and improving system efficiency. Series–series (SS) compensation topology is widely employed due to a simple structure and the characteristic of constant current output (CCO). However, it has three serious drawbacks: high-voltage stresses on compensation capacitors, poor CCO characteristic under practical situations and significant dependence on coupling coils. This study proposes LC/CL (primary inductor–capacitor and secondary capacitor–inductor) compensation topology to eliminate aforementioned deficiencies of SS. The voltage stresses on compensation capacitors of LC/CL are much lower than those of SS. LC/CL also provides better CCO characteristics in imperfect scenarios. Load current of LC/CL compensated system only increases by 1.89% when the load is reduced by half. In contrast, the load current of SS compensated system increases by 6.87% with identical load reduction. An efficiency-based optimisation method is proposed for higher end-to-end efficiency as well. The validity of the optimisation is justified by both simulation and experiment. The efficiency of the optimised system is about 2% higher than that of a non-optimised system.


    1. 1)
      • 1. Chinthavali, M., Wang, Z.J.: ‘Sensitivity analysis of a wireless power transfer (WPT) system for electric vehicle application’. 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, pp. 18.
    2. 2)
      • 2. Fujita, T., Yasuda, T., Akagi, H.: ‘A wireless power transfer system with a double-current rectifier for EVs’. 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, pp. 17.
    3. 3)
      • 3. Li, W., Zhao, H., Deng, J., et al: ‘Comparison study on SS and double-sided LCC compensation topologies for EV/PHEV wireless chargers’, IEEE Trans. Veh. Technol., 2016, 65, (6), pp. 44294439.
    4. 4)
      • 4. Zhang, W., Mi, C.C.: ‘Compensation topologies of high-power wireless power transfer systems’, IEEE Trans. Veh. Technol., 2016, 65, (6), pp. 47684778.
    5. 5)
      • 5. Zhou, W., Ma, H.: ‘Design considerations of compensation topologies in ICPT system’. Proc. IEEE Conf. Applied Power Electronics, 2007, pp. 985990.
    6. 6)
      • 6. Sallán, J., Villa, J.L., Llombart, A., et al: ‘Optimal design of ICPT systems applied to electric vehicle battery charge’, IEEE Trans. Ind. Electron., 2009, 56, (6), pp. 21402149.
    7. 7)
      • 7. Wang, Y., Yao, Y., Liu, X., et al: ‘S/CLC compensation topology analysis and circular coil design for wireless power transfer’, IEEE Trans. Transp. Electrification, 2017, 3, (2), pp. 496507.
    8. 8)
      • 8. Hou, J., Chen, Q., Wong, S.-C., et al: ‘Analysis and control of series/series-parallel compensated resonant converters for contactless power transfer’, IEEE J. Emerg. Sel. Top. Power Electron., 2015, 3, (1), pp. 124136.
    9. 9)
      • 9. Hou, J., Chen, Q., Ren, X., et al: ‘Precise characteristics analysis of series/series-parallel compensated contactless resonant converter’, IEEE J. Emerg. Sel. Top. Power Electron., 2015, 3, (1), pp. 101110.
    10. 10)
      • 10. Su, Y., Tang, C., Wu, S., et al: ‘Research of LCL resonant inverter in wireless power transfer system’. 2006 Int. Conf. Power System Technology, Chongqing, 2006, pp. 16.
    11. 11)
      • 11. Keeling, N., Covic, G.A., Hao, F., et al: ‘Variable tuning in LCL compensated contactless power transfer pickups’. Energy Conversion Congress and Exposition, 2009, ECCE 2009, San Jose, CA, 2009, pp. 18261832.
    12. 12)
      • 12. Liu, C., Ge, S., Guo, Y., et al: ‘Double-LCL resonant compensation network for electric vehicles wireless power transfer: experimental study and analysis’, IET Power Electron., 2016, 9, (11), pp. 22622270.
    13. 13)
      • 13. Pantic, Z., Bai, S., Lukic, S.M.: ‘ZCS LCC-Compensated resonant inverter for inductive-power-transfer application’, IEEE Trans. Ind. Electron., 2011, 58, (8), pp. 35003510.
    14. 14)
      • 14. Zhu, Q., Wang, L., Guo, Y., et al: ‘Applying LCC compensation network to dynamic wireless EV charging system’, IEEE Trans. Ind. Electron., 2016, 63, (10), pp. 65576567.
    15. 15)
      • 15. Jang, J.J., Chae, W.Y., Kim, H.S., et al: ‘A study on optimization of the wireless power transfer using the half-bridge flyback converter’. 2010 Second Int. Conf. Computer Research and Development, Kuala Lumpur, 2010, pp. 717719.
    16. 16)
      • 16. Anh, P.T., Chen, M.H.: ‘Design and optimization of high-efficiency resonant wireless power transfer system’. 2016 Int. Conf. System Science and Engineering (ICSSE), Puli, 2016, pp. 14.
    17. 17)
      • 17. Zhang, C., Lin, D., Hu, S.Y.R.: ‘Efficiency optimization method of inductive coupling wireless power transfer system with multiple transmitters and single receiver’. 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, USA, 2016, pp. 16.
    18. 18)
      • 18. Sampath, J.P.K., Alphones, A., Vilathgamuwa, D.M.: ‘Figure of merit for the optimization of wireless power transfer system against misalignment tolerance’, IEEE Trans. Power Electron., 2017, 32, (6), pp. 43594369.
    19. 19)
      • 19. Prengel, S., Helwig, M., Modler, N.: ‘Lightweight coil for efficient wireless power transfer: optimization of weight and efficiency for WPT coils’. 2014 IEEE Wireless Power Transfer Conf., Jeju, 2014, pp. 9699.
    20. 20)
      • 20. Geng, Y., Yang, Z., Lin, F., et al: ‘Optimization of compensation capacitor for wireless power transfer system based on inverter loss’. 2016 IEEE Vehicle Power and Propulsion Conf. (VPPC), Hangzhou, 2016, pp. 16.
    21. 21)
      • 21. Joung, G.B., Cho, B.H.: ‘An energy transmission system for an artificial heart using leakage inductance compensation of transcutaneous transformer’, IEEE Trans. Power Electron., 1998, 13, (6), pp. 10131022.
    22. 22)
      • 22. Voglitsis, D., Todorčeviá, T., Prasanth, V., et al: ‘Loss model and control stability of bidirectional LCL-IPT system’. 2014 4th Int. Electric Drives Production Conf. (EDPC), Nuremberg, 2014, pp. 18.
    23. 23)
      • 23. Bartoli, M., Noferi, N., Reatti, A., et al: ‘Modeling litz-wire winding losses in high-frequency power inductors’. PESC Record. 27th Annual IEEE Power Electronics Specialists Conf., Baveno, 1996, vol. 2, pp. 16901696.
    24. 24)
      • 24. Deng, Q., et al: ‘Frequency-dependent resistance of litz-wire square solenoid coils and quality factor optimization for wireless power transfer’, IEEE Trans. Ind. Electron., 2016, 63, (5), pp. 28252837.
    25. 25)
      • 25. EPCOS Data Book 2017 ― Ferrites and Accessories. TDK Corporation, Minato-ku, Tokyo, Japan, 2017, p. 129.
    26. 26)
      • 26. Wang, Y., Yao, Y., Liu, X., et al: ‘An LC/S compensation topology and coil design technique for wireless power transfer’, IEEE Trans. Power Electron., 2018, 33, (3), pp. 20072025.
    27. 27)
      • 27. Steinmetz, C.P.: ‘On the law of hysteresis’, Trans. Am. Inst. Electrical Eng., 1892, IX, (1), pp. 164.
    28. 28)
      • 28. Reinert, J., Brockmeyer, A., De Doncker, R.W.A.A.: ‘Calculation of losses in ferro- and ferrimagnetic materials based on the modified Steinmetz equation’. IEEE Trans. Ind. Appl., 2001, 37, (4), pp. 10551061.
    29. 29)
      • 29. Mohan, N., Undeland, T.M., Robbins, W.P.: ‘Review of basic electrical and magnetic circuit concepts’. in Mohan, N., Undeland, T.M., Robbins, W.P. (Eds.): ‘Power electronics: converters, applications, and Design’ (John Wiley & Sons, Inc., Hoboken, NJ, USA, 2003, 3rd edn.), pp. 4851.
    30. 30)
      • 30. Li, S., Li, W., Deng, J., et al: ‘A double-sided LCC compensation network and its tuning method for wireless power transfer’, IEEE Trans. Veh. Technol., 2015, 64, (6), pp. 22612273.

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