Highly Resonant Power Transfer (HRPT) technology is currently receiving very significant attention from the industry and the smart power grid distribution community in particular. This technology ensures electrical power transmission between two points while controlling the level of transmitted power and ensures the immediate shutdown of the transmitted power in the event of a problem. This paper reviews the inductive power transfer method and describes the design of an ultra-compact PLA core electromagnetic coupler. The proposed architecture confines the magnetic field in a toroidal PLA core transformer, and by avoiding the use of heavy and bulky shielding plates, reduces magnetic losses and avoids the Curie point. As a result, the overall unit has a weight of 5 kg and a volume of only 0.013 m3. The electromagnetic coupler is capable of transferring a peak power of 150 kW with an operating frequency of 193 kHz, giving a satisfactory efficiency of 95%. The proposed novel system was first investigated through CST 3D numerical modelling to determine the electrical parameters of the coupler’s equivalent circuit and its efficiency, to verify its compatibility with the ICNIRP 2010 standard and to evaluate its temperature rise with an air-cooling system. Afterwards, the designed coupler was built with a 3D printing device and finally tested experimentally. Simulation and experimental results are compared and show a good agreement.
References
[1]
Nicholas, M. and Hall, D. (2018) Lessons Learned on Early Electric Vehicle Fast-Charging Deployments. International Council on Clean Transportation, Washington, USA, 54.
[2]
Steigerwals, R.L., Saj, C.F. and Croff, G.A. (2001) Analysis and Design of a Contactless Rotary Power Transfer System. 2001 IEEE 32nd Annual Power Electronics Specialists Conference, Vancouver, Canada, 17-21 June 2001, 2125-2130.
[3]
Sallan, J., Villa, J.L., Llombart, A. and Sanz, J.F. (2009) Optimal Design of ICPT Systems Applied to Electric Vehicle Battery Charge. IEEE Transactions on Industrial Electronics, 56, 2140-2149.
[4]
Etemadrezaei, M. and Lukic, S.M. (2012) Equivalent Complex Permeability and Conductivity of Litz Wire in Wireless Power Transfer Systems. 2012 IEEE Energy Conversion Congress and Exposition (ECCE), Raleigh, NC, 15-20 September 2012, 3833-3840.
[5]
Ryu, M., Cha, H., Park, Y. and Back, J. (2005) Analysis of the Contactless Power Transfer System Using Modelling and Analysis of the Contactless Transformer. 31st Annual Conference of IEEE Industrial Electronics Society, Raleigh, USA, 6-10 November 2005, 7.
[6]
Abdelhamid, E., AbdelSalam, A.K., Massoud, A. and Ahmed, S. (2014) An Enhanced Performance IPT Based Battery Charger for Electric Vehicles Application. 2014 IEEE 23rd International Symposium on Industrial Electronics, Turkey, Istanbul, 1-4 June 2014, 1610-1615.
[7]
Bhuyan, S., Sivanand, K. and Panda, S.K. (2013) Effect of Design Parameters on Resonant Wireless Energy Transfer System. Journal of Electromagnetic Waves and Applications, 27, 288-298. https://doi.org/10.1080/09205071.2013.744125
[8]
Lee, J.-W., Woo, D.-G., Ryu, S.-H., Lee, B.-K. and Kim, H.-J. (2015) Practical Bifurcation Criteria Considering Coil Losses and Compensation Topologies in Inductive Power Transfer System. 2015 IEEE International Telecommunications Energy Conference (INTELEC), Osaka, Japan, 18-22 October 2015, 1-6.
[9]
Chopre, S. and Bauer, P. (2013) Analysis and Design Considerations for a Contactless Power Transfer System. 2011 IEEE 33rd International Telecommunications Energy Conference (INTELEC), Amsterdam, Netherlands, 9-13 October 2011, 1-6.
[10]
Kalwar, K.A., Aamir, M. and Mekhilef, S. (2015) Inductively Coupled Power Transfer (ICPT) for Electric Vehicle Charging—A Review. Renewable and Sustainable Energy Reviews, 47, 462-474. https://doi.org/10.1016/j.rser.2015.03.040
[11]
Vesely, P., Horynová, E., Tichy, T. and Šefl, O. (2018) Study of Electrical Properties of 3D Printed Objects. 5.
[12]
Knecht, O., Bosshard, R., Kolar, J.W. and Starck, C.T. (2014) Optimization of Transcutaneous Energy Transfer Coils for High Power Medical Applications. 2014 IEEE 15th Workshop on Control and Modeling for Power Electronics (COMPEL), Santander, Spain, 22-25 June 2014, 1-10.
[13]
Kar, D.P., Biswal, S.S., Sahoo, P.K., Nayak, P.P. and Bhuyan, S. (2018) Selection of Maximum Power Transfer Region for Resonant Inductively Coupled Wireless Charging System. AEU—International Journal of Electronics and Communications, 84, 84-92. https://doi.org/10.1016/j.aeue.2017.11.023
[14]
Bosshard, R. (2015) Multi-Objective Optimization of Inductive Power Transfer Systems for EV Charging. ETH Zurich.
[15]
Kim, J., Kong, J., Kim, S. and Suh, H. (2013) Coil Design and Shielding Methods for a Magnetic Resonant Wireless Power Transfer System. Proceedings of the IEEE, 101, 1332-1342.
[16]
Institute of Electrical and Electronics Engineers (2016) IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz. IEEE C95. 1-1991, New York.
[17]
International Commission on Non-Ionizing Radiation Protection (2009) ICNIRP Guidelines for Limiting Exposure to Time-Varying Electric, Magnetic and Electromagnetic Fields up 300GHz. Healthy Physics, 97, 257-258.
[18]
Budhia, M., Covic, G.A. and Boys, J.T. (2011) Design and Optimization of Circular Magnetic Structures for Lumped Inductive Power Transfer Systems. IEEE Transactions on Power Electronics, 26, 3096-3108.
