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Analysis and optimization of a solenoid coupler for wireless electric vehicle charging

Published online by Cambridge University Press:  22 November 2016

Katharina Knaisch ,
Tom Huck  and
Peter Gratzfeld
Katharina Knaisch*
Affiliation:
Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Rintheimer Querallee 2, 76131 Karlsruhe, Germany
Tom Huck
Affiliation:
Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Rintheimer Querallee 2, 76131 Karlsruhe, Germany
Peter Gratzfeld
Affiliation:
Karlsruhe Institute of Technology, Institute of Vehicle System Technology, Rintheimer Querallee 2, 76131 Karlsruhe, Germany
*
Corresponding author: K. Knaisch Email: [email protected]
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Abstract

In light of the increased interest in e-mobility, comfortable, and safe charging systems, such as inductive charging systems, are gaining importance. Several standardization bodies develop guidelines and specifications for inductive power transfer systems in order to ensure a good interoperability between different coil architectures from the various car manufacturers, wireless power transfer suppliers, and infrastructure companies. A combination of a bipolar magnetic coil design on the primary side with a secondary solenoidal coil promises a good magnetic coupling and a high-transmitted power with small dimensions at the same time. In order to get a profound knowledge of the influence and behavior of the main variables on the coil system, a detailed parameter study is conducted in this paper. Based on these findings, a solenoid was designed for a specific case of application. Further, this design is optimized. The dimensions of the system could be reduced by 50% with a constant coupling factor at the same time. Besides the reduction of the dimensions and subsequently the costs of the systems, the stray field could be reduced significantly.

Keywords

Inductive power transferElectric vehiclesCoil designSolenoidOptimization
Type
Research Article
Information
Wireless Power Transfer , Volume 4 , Issue 1 , March 2017 , pp. 13 - 20
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Copyright
Copyright © Cambridge University Press 2016 

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