Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System

In coupled magnetic resonance (CMR) wireless energy transfer systems, the energy transfer power is low and the power transfer efficiency changes with the coil position. One reason for this reduction in power and efficiency is the impedance mismatching (IM) between the Tx and Rx coils; achieving impe...

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Autores principales:	Ziyang Lu, Yubin Zhao, Dunge Liu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	multi-coil wireless power transmission coupled magnetic resonance adaptive impedance matching Electronics TK7800-8360
Acceso en línea:	https://doaj.org/article/b5eb53f4dbb24ac5944d0313902a289e
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spelling	oai:doaj.org-article:b5eb53f4dbb24ac5944d0313902a289e2021-11-25T17:24:39ZAdaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System10.3390/electronics102227882079-9292https://doaj.org/article/b5eb53f4dbb24ac5944d0313902a289e2021-11-01T00:00:00Zhttps://www.mdpi.com/2079-9292/10/22/2788https://doaj.org/toc/2079-9292In coupled magnetic resonance (CMR) wireless energy transfer systems, the energy transfer power is low and the power transfer efficiency changes with the coil position. One reason for this reduction in power and efficiency is the impedance mismatching (IM) between the Tx and Rx coils; achieving impedance matching for multiple-input multiple-output (MIMO) CMR IM wireless power transmission (WPT) is quite complex due to the uncertainty in the number of coils and the interaction between coils. In this paper, we provide an analytical model of MIMO CMR which fully formulates the complex relationship between multiple Tx and Rx channels. Then, we design an impedance matching network (IMN) for MIMO CMR and derive an optimal IM solution. Base on this solution, we also develop an adaptive impedance matching scheme to control IMN, based on an automatic analysis of MIMO CMR system; the resulting control scheme achieves optimal values for transmission power and efficiency through IMN and coil selection. The simulation results indicate that the scheme is able to automatically adjust the impedance matching network according to the changes of the relative positions between Tx and Rx coils to achieve high energy transfer power and efficiency.Ziyang LuYubin ZhaoDunge LiuMDPI AGarticlemulti-coilwireless power transmissioncoupled magnetic resonanceadaptive impedance matchingElectronicsTK7800-8360ENElectronics, Vol 10, Iss 2788, p 2788 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	multi-coil wireless power transmission coupled magnetic resonance adaptive impedance matching Electronics TK7800-8360
spellingShingle	multi-coil wireless power transmission coupled magnetic resonance adaptive impedance matching Electronics TK7800-8360 Ziyang Lu Yubin Zhao Dunge Liu Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
description	In coupled magnetic resonance (CMR) wireless energy transfer systems, the energy transfer power is low and the power transfer efficiency changes with the coil position. One reason for this reduction in power and efficiency is the impedance mismatching (IM) between the Tx and Rx coils; achieving impedance matching for multiple-input multiple-output (MIMO) CMR IM wireless power transmission (WPT) is quite complex due to the uncertainty in the number of coils and the interaction between coils. In this paper, we provide an analytical model of MIMO CMR which fully formulates the complex relationship between multiple Tx and Rx channels. Then, we design an impedance matching network (IMN) for MIMO CMR and derive an optimal IM solution. Base on this solution, we also develop an adaptive impedance matching scheme to control IMN, based on an automatic analysis of MIMO CMR system; the resulting control scheme achieves optimal values for transmission power and efficiency through IMN and coil selection. The simulation results indicate that the scheme is able to automatically adjust the impedance matching network according to the changes of the relative positions between Tx and Rx coils to achieve high energy transfer power and efficiency.
format	article
author	Ziyang Lu Yubin Zhao Dunge Liu
author_facet	Ziyang Lu Yubin Zhao Dunge Liu
author_sort	Ziyang Lu
title	Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
title_short	Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
title_full	Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
title_fullStr	Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
title_full_unstemmed	Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System
title_sort	adaptive impedance matching scheme for magnetic mimo wireless power transfer system
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/b5eb53f4dbb24ac5944d0313902a289e
work_keys_str_mv	AT ziyanglu adaptiveimpedancematchingschemeformagneticmimowirelesspowertransfersystem AT yubinzhao adaptiveimpedancematchingschemeformagneticmimowirelesspowertransfersystem AT dungeliu adaptiveimpedancematchingschemeformagneticmimowirelesspowertransfersystem
_version_	1718412430099349504

Adaptive Impedance Matching Scheme for Magnetic MIMO Wireless Power Transfer System

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