The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems

Niedermeier Florian; Hassler Marius; Krammer Josef; Schmuelling Benedikt; Niedermeier Florian; Hassler Marius; Krammer Josef; Schmuelling Benedikt

doi:10.1017/wpt.2019.7

2019 Volume 6

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The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems

1.
BMW Group, 80788 Munich, Germany
2.
University of Wuppertal, Rainer-Gruenter-Str. 21, 42119 Wuppertal, Germany
3.
Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany

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Author Bio:
Florian Niedermeier received his B.Sc. degree in electrical engineering from the Technical University of Vienna, Austria, and his M.Sc. degree in electrical engineering from the Technical University of Munich, Germany. He is currently working on his Dr.-Ing. degree at the University of Wuppertal, Germany, and works as a research associate at BMW Group. His main research interests are simulation and analysis of inductive power transfer systems.

Marius Hassler received his B.Sc. and M.Sc. degree in physics with specialization in condensed matter from the Technical University of Munich, Germany. He is currently working toward the Dr.-Ing. degree in engineering with BMW Group, from the Technical University of Munich, Germany. His current research interests include circuit simulation and inductive charging.

Josef Krammer received the Dipl.-Ing. degree in electrical engineering from the Department of Electrical and Computer Engineering at the Technical University of Munich, TUM, Germany. He worked as a researcher at the Institute of Circuit Theory and Signal Processing at the TUM where he received the degree of Dr.-Ing. Since 1991 he is working at BMW Group in different engineering positions for the development of electronics for conventional and electric vehicles.

Benedikt Schmuelling received the M.Sc. degree (Dipl.-Ing.) in electrical engineering from the Faculty of Electrical Engineering and Information Technology of Dortmund University, Germany, in 2005. From 2005 until 2010, he worked as a researcher at the Institute of Electrical Machines, RWTH Aachen University, Germany, where he also received his Ph.D. degree in 2009. From 2010 until 2012, he was with Vahle Inc., Kamen, Germany, where he worked as an engineer on the development of wireless charging stations for electric vehicles. Since 2012 he is with the University of Wuppertal, Germany, where he is the head of the Chair of Electric Mobility and Energy Storage Systems at the School of Electrical, Information and Media Engineering. His research fields include electric mobility, wireless power transfer, renewable energies, energy storage systems, and efficiency topics
Corresponding author: F. Niedermeier, University of Wuppertal, Rainer-Gruenter-Str. 21, 42119 Wuppertal, Germany. Email: F.Niedermeier@me.com

Wireless Power Transfer 2019, 6(2): 77-84 | Cite this article

Abstract

The characteristic transfer parameters of inductive power transfer systems highly depend on the relative position of the coils to each other. While translational offset has been investigated in the past, the effect of rotatory offset on the transfer parameters is widely unclear. This paper contains simulation results of an inductive power transfer system with a rotatory offset in three axes and shows the possible improvements in the coupling coefficient. As a result, rotation angles can be used as control parameters and thereby increase the system efficiency. Alternatively, the allowed misalignment area of the secondary coil can be increased while maintaining the functionality and same dimensions.
- Inductive charging,
- Wireless power transfer,
- Angular misalignment,
- Rotatory offset

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Niedermeier F, Hassler M, Krammer J, Schmuelling B. 2019. The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems. Wireless Power Transfer 6(2): 77-84 doi: 10.1017/wpt.2019.7

Niedermeier F, Hassler M, Krammer J, Schmuelling B. 2019. The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems. Wireless Power Transfer 6(2): 77-84 doi: 10.1017/wpt.2019.7

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The effect of rotatory coil misalignment on transfer parameters of inductive power transfer systems

1.
BMW Group, 80788 Munich, Germany
2.
University of Wuppertal, Rainer-Gruenter-Str. 21, 42119 Wuppertal, Germany
3.
Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany

Author Bio:
Florian Niedermeier received his B.Sc. degree in electrical engineering from the Technical University of Vienna, Austria, and his M.Sc. degree in electrical engineering from the Technical University of Munich, Germany. He is currently working on his Dr.-Ing. degree at the University of Wuppertal, Germany, and works as a research associate at BMW Group. His main research interests are simulation and analysis of inductive power transfer systems.

Marius Hassler received his B.Sc. and M.Sc. degree in physics with specialization in condensed matter from the Technical University of Munich, Germany. He is currently working toward the Dr.-Ing. degree in engineering with BMW Group, from the Technical University of Munich, Germany. His current research interests include circuit simulation and inductive charging.

Josef Krammer received the Dipl.-Ing. degree in electrical engineering from the Department of Electrical and Computer Engineering at the Technical University of Munich, TUM, Germany. He worked as a researcher at the Institute of Circuit Theory and Signal Processing at the TUM where he received the degree of Dr.-Ing. Since 1991 he is working at BMW Group in different engineering positions for the development of electronics for conventional and electric vehicles.

Benedikt Schmuelling received the M.Sc. degree (Dipl.-Ing.) in electrical engineering from the Faculty of Electrical Engineering and Information Technology of Dortmund University, Germany, in 2005. From 2005 until 2010, he worked as a researcher at the Institute of Electrical Machines, RWTH Aachen University, Germany, where he also received his Ph.D. degree in 2009. From 2010 until 2012, he was with Vahle Inc., Kamen, Germany, where he worked as an engineer on the development of wireless charging stations for electric vehicles. Since 2012 he is with the University of Wuppertal, Germany, where he is the head of the Chair of Electric Mobility and Energy Storage Systems at the School of Electrical, Information and Media Engineering. His research fields include electric mobility, wireless power transfer, renewable energies, energy storage systems, and efficiency topics
Corresponding author: F. Niedermeier, University of Wuppertal, Rainer-Gruenter-Str. 21, 42119 Wuppertal, Germany. Email: F.Niedermeier@me.com

Wireless Power Transfer 6, Article number: 10.1017/wpt.2019.7 (2019) | Cite this article

Abstract: The characteristic transfer parameters of inductive power transfer systems highly depend on the relative position of the coils to each other. While translational offset has been investigated in the past, the effect of rotatory offset on the transfer parameters is widely unclear. This paper contains simulation results of an inductive power transfer system with a rotatory offset in three axes and shows the possible improvements in the coupling coefficient. As a result, rotation angles can be used as control parameters and thereby increase the system efficiency. Alternatively, the allowed misalignment area of the secondary coil can be increased while maintaining the functionality and same dimensions.

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