A model for coupling under coil misalignment for DD pads and circular pads of WPT system

Guangjie Ke; Qianhong Chen; Ligang Xu; Siu Chung Wong; Chi Kong Tse

doi:10.1109/ECCE.2016.7854706

A model for coupling under coil misalignment for DD pads and circular pads of WPT system

Guangjie Ke, Qianhong Chen, Ligang Xu, Siu Chung Wong, Chi Kong Tse

The Hong Kong Polytechnic University

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

20 Citations (Scopus)

Abstract

The coupling coefficient of a transformer is a key parameter affecting the performance of a wireless power transmission system. Based on the magnetic reluctance model under aligned condition, this paper gives an effective method for calculating the null coupling position, as well as a practical and accurate model for finding the coupling coefficient under coil misalignment and varying air gap. The null coupling position is determined by the horizontal offset when the flux of opposite direction that is intersected with the receiving coil is cancelled out. An empirical formula is given to correct the null coupling position. Based on the physics of coupling under misaligned conditions, a practical model for coupling is constructed. Transformers with DD structure and typical circular structure are fabricated for verification. Experimental measurement validates the model.

Original language	English
Title of host publication	ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings
Publisher	IEEE
ISBN (Electronic)	9781509007370
DOIs	https://doi.org/10.1109/ECCE.2016.7854706
Publication status	Published - 1 Jan 2016
Event	2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016 - Milwaukee, United States Duration: 18 Sept 2016 → 22 Sept 2016

Conference

Conference	2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016
Country/Territory	United States
City	Milwaukee
Period	18/09/16 → 22/09/16

Keywords

coupling coefficient
misalignment
null coupling position
Wireless power transfer

ASJC Scopus subject areas

Control and Systems Engineering
Electrical and Electronic Engineering
Energy Engineering and Power Technology
Control and Optimization

More information

10.1109/ECCE.2016.7854706

Cite this

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title = "A model for coupling under coil misalignment for DD pads and circular pads of WPT system",

abstract = "The coupling coefficient of a transformer is a key parameter affecting the performance of a wireless power transmission system. Based on the magnetic reluctance model under aligned condition, this paper gives an effective method for calculating the null coupling position, as well as a practical and accurate model for finding the coupling coefficient under coil misalignment and varying air gap. The null coupling position is determined by the horizontal offset when the flux of opposite direction that is intersected with the receiving coil is cancelled out. An empirical formula is given to correct the null coupling position. Based on the physics of coupling under misaligned conditions, a practical model for coupling is constructed. Transformers with DD structure and typical circular structure are fabricated for verification. Experimental measurement validates the model.",

keywords = "coupling coefficient, misalignment, null coupling position, Wireless power transfer",

author = "Guangjie Ke and Qianhong Chen and Ligang Xu and Wong, {Siu Chung} and Tse, {Chi Kong}",

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Ke, G, Chen, Q, Xu, L, Wong, SC & Tse, CK 2016, A model for coupling under coil misalignment for DD pads and circular pads of WPT system. in ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings., 7854706, IEEE, 2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016, Milwaukee, United States, 18/09/16. https://doi.org/10.1109/ECCE.2016.7854706

A model for coupling under coil misalignment for DD pads and circular pads of WPT system. / Ke, Guangjie; Chen, Qianhong; Xu, Ligang et al.
ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings. IEEE, 2016. 7854706.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

TY - GEN

T1 - A model for coupling under coil misalignment for DD pads and circular pads of WPT system

AU - Ke, Guangjie

AU - Chen, Qianhong

AU - Xu, Ligang

AU - Wong, Siu Chung

AU - Tse, Chi Kong

PY - 2016/1/1

Y1 - 2016/1/1

N2 - The coupling coefficient of a transformer is a key parameter affecting the performance of a wireless power transmission system. Based on the magnetic reluctance model under aligned condition, this paper gives an effective method for calculating the null coupling position, as well as a practical and accurate model for finding the coupling coefficient under coil misalignment and varying air gap. The null coupling position is determined by the horizontal offset when the flux of opposite direction that is intersected with the receiving coil is cancelled out. An empirical formula is given to correct the null coupling position. Based on the physics of coupling under misaligned conditions, a practical model for coupling is constructed. Transformers with DD structure and typical circular structure are fabricated for verification. Experimental measurement validates the model.

AB - The coupling coefficient of a transformer is a key parameter affecting the performance of a wireless power transmission system. Based on the magnetic reluctance model under aligned condition, this paper gives an effective method for calculating the null coupling position, as well as a practical and accurate model for finding the coupling coefficient under coil misalignment and varying air gap. The null coupling position is determined by the horizontal offset when the flux of opposite direction that is intersected with the receiving coil is cancelled out. An empirical formula is given to correct the null coupling position. Based on the physics of coupling under misaligned conditions, a practical model for coupling is constructed. Transformers with DD structure and typical circular structure are fabricated for verification. Experimental measurement validates the model.

KW - coupling coefficient

KW - misalignment

KW - null coupling position

KW - Wireless power transfer

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DO - 10.1109/ECCE.2016.7854706

M3 - Conference article published in proceeding or book

BT - ECCE 2016 - IEEE Energy Conversion Congress and Exposition, Proceedings

PB - IEEE

T2 - 2016 IEEE Energy Conversion Congress and Exposition, ECCE 2016

Y2 - 18 September 2016 through 22 September 2016

ER -

A model for coupling under coil misalignment for DD pads and circular pads of WPT system

Abstract

Conference

Keywords

ASJC Scopus subject areas

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