Overview
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ABSTRACT
This article describes the main principles of contactless energy transfer. After a short review of various options of wireless energy transfer, the article focuses on the magnetic coupling transfer for automotive charging in medium power applications. The article deals with the modeling of a large air gap coupler. Different compensation modes are then analyzed and compared. A pre-dimensioning method for the coupler is proposed, based on simple finite element simulations. The coupler is designed and included in a DC-DC topology with series-series resonance. The whole system was studied and a 20 kW prototype made and successfully tested.
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Read the articleAUTHORS
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Jean-Paul FERRIEUX: University Professor - Grenoble Electrical Engineering Laboratory (G2Elab), Grenoble INP - Grenoble Alpes University, CNRS, Grenoble, France
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Gérard MEUNIER: Research Director - Grenoble Electrical Engineering Laboratory (G2Elab), Grenoble INP - Grenoble Alpes University, CNRS, Grenoble, France
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Benoît SARRAZIN: Research Engineer - Grenoble Electrical Engineering Laboratory (G2Elab), Grenoble INP - Grenoble Alpes University, CNRS, Grenoble, France
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Alexis DERBEY: Design Engineer - Grenoble Electrical Engineering Laboratory (G2Elab), Grenoble INP - Grenoble Alpes University, CNRS, Grenoble, France
INTRODUCTION
Non-contact energy transfer, or wireless energy transfer, is a generic term for a variety of techniques for transferring electrical energy remotely, without a physical link, from a transmitting device (or transmitting antenna) to a receiving device (or receiving antenna). This type of energy transfer can take various forms: magnetic induction, electrical influence, electromagnetic radiation (radio waves, microwaves, infrared laser) .
Wireless Power Transfer (WPT) has applications in a wide range of fields, from mobile electronics (charging smartphones, laptops, tablets, GPS, etc.), to the transport sector (cars, buses, streetcars, etc.), to active medical implants (pacemakers, defibrillators, hearing aids, insulin pumps, brain valves, etc.). In these applications, the electrical energy transmitted is used to charge a battery. WPT is also used in heating systems :
electromagnetic induction heating of metals and semiconductor materials in the fields of metallurgy and mechanics (crucible melting furnaces, heating before forming, surface heat treatment), chemistry (direct melting of glasses and oxides, etc.), and consumer applications (kitchen hotplates);
microwave radiation heating (microwave oven) ;
infrared heating in the home (radiators, infrared panels).
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KEYWORDS
power electronics | magnetic coupling | resonant converter | contactless power transfer
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Conversion of electrical energy
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Non-contact medium-power induction energy transfer
Context
Bibliography
Software tools
PSIM: circuit simulation software. http://powersimtech.com/products/psim/
FLUX: finite element simulation software, Altair Engineering, Meylan, France. https://altairhyperworks.com/product/flux
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Events
SGE: Symposium de Génie Électrique. Biannual French-speaking event http://www.sge-conf.fr
Standards and norms
- Industrial, scientific and medical equipment – Radio interference characteristics – Measurement limits and methods. - Norme NF EN 55011 - Mai 2010
- Wireless Power Transfer for Light-Duty Plug-In / Electric Vehicles and Alignment Methodology. - Norme SAE J 2954 - Mai 2016
- concernant les prescriptions minimales de sécurité et de santé relatives à l'exposition des travailleurs aux risques dus aux agents physiques...
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