Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization
Wireless power transfer with multiple transmitters can have several advantages, including more robustness against misalignment and extending the mobility and range of the receiver(s). In this work, the efficiency maximization problem is analytically solved for a capacitive wireless power transfer sy...
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doaj-90cb0a5ca1454500b88830e225e3deb92020-11-25T03:28:19ZengMDPI AGEnergies1996-10732020-07-01133482348210.3390/en13133482Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency OptimizationBen Minnaert0Alessandra Costanzo1Giuseppina Monti2Mauro Mongiardo3Department of Industrial Science and Technology, Odisee University College of Applied Sciences, 9000 Ghent, BelgiumDepartment of Electrical, Electronic and Information Engineering Guglielmo Marconi, University of Bologna, 40126 Bologna, ItalyDepartment of Engineering for Innovation, University of Salento, 73100 Lecce, ItalyDepartment of Engineering, University of Perugia, 06123 Perugia, ItalyWireless power transfer with multiple transmitters can have several advantages, including more robustness against misalignment and extending the mobility and range of the receiver(s). In this work, the efficiency maximization problem is analytically solved for a capacitive wireless power transfer system with multiple coupled transmitters and a single receiver. It is found that the system efficiency can be increased by adding more transmitters. Moreover, it is proven that the cross-coupling between the transmitters can be eliminated by adding shunt susceptances at the input ports. Optimal values for the input currents and receiver load are determined to achieve maximum efficiency. As well the optimal load, the optimal input currents and the maximum efficiency are independent on the cross-coupling. By impedance-matching the internal conductances of the generators, the maximum-efficiency solution also becomes the one that provides the maximum output power. Finally, by expressing each transmitter–receiver link with its kQ-product, the maximum system efficiency can be calculated. The analytical results are verified by circuital simulation.https://www.mdpi.com/1996-1073/13/13/3482capacitive wireless power transferresonancewireless power transferpower-transfer efficiencymultiportsmultiple-input single-output |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Ben Minnaert Alessandra Costanzo Giuseppina Monti Mauro Mongiardo |
spellingShingle |
Ben Minnaert Alessandra Costanzo Giuseppina Monti Mauro Mongiardo Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization Energies capacitive wireless power transfer resonance wireless power transfer power-transfer efficiency multiports multiple-input single-output |
author_facet |
Ben Minnaert Alessandra Costanzo Giuseppina Monti Mauro Mongiardo |
author_sort |
Ben Minnaert |
title |
Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization |
title_short |
Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization |
title_full |
Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization |
title_fullStr |
Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization |
title_full_unstemmed |
Capacitive Wireless Power Transfer with Multiple Transmitters: Efficiency Optimization |
title_sort |
capacitive wireless power transfer with multiple transmitters: efficiency optimization |
publisher |
MDPI AG |
series |
Energies |
issn |
1996-1073 |
publishDate |
2020-07-01 |
description |
Wireless power transfer with multiple transmitters can have several advantages, including more robustness against misalignment and extending the mobility and range of the receiver(s). In this work, the efficiency maximization problem is analytically solved for a capacitive wireless power transfer system with multiple coupled transmitters and a single receiver. It is found that the system efficiency can be increased by adding more transmitters. Moreover, it is proven that the cross-coupling between the transmitters can be eliminated by adding shunt susceptances at the input ports. Optimal values for the input currents and receiver load are determined to achieve maximum efficiency. As well the optimal load, the optimal input currents and the maximum efficiency are independent on the cross-coupling. By impedance-matching the internal conductances of the generators, the maximum-efficiency solution also becomes the one that provides the maximum output power. Finally, by expressing each transmitter–receiver link with its kQ-product, the maximum system efficiency can be calculated. The analytical results are verified by circuital simulation. |
topic |
capacitive wireless power transfer resonance wireless power transfer power-transfer efficiency multiports multiple-input single-output |
url |
https://www.mdpi.com/1996-1073/13/13/3482 |
work_keys_str_mv |
AT benminnaert capacitivewirelesspowertransferwithmultipletransmittersefficiencyoptimization AT alessandracostanzo capacitivewirelesspowertransferwithmultipletransmittersefficiencyoptimization AT giuseppinamonti capacitivewirelesspowertransferwithmultipletransmittersefficiencyoptimization AT mauromongiardo capacitivewirelesspowertransferwithmultipletransmittersefficiencyoptimization |
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