Multiplexed supply of a MISO wireless power transfer system for battery-free wireless sensors

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Ghada Bouattour
  • Mohamed Elhawy
  • Slim Naifar
  • Christian Viehweger
  • Houda Ben Jmaa Derbel
  • Olfa Kanoun

Multi-input single output wireless power transmission (MISO-WPT) systems have decisive advantages concerning flexible receiver position in comparison to single coil systems. However, the supply of the primary side brings a large uncertainty in case of variable positions of the secondary side. In this paper, a compact multiplexed primary side electronic circuit is proposed, which includes only one signal generator, a passive peak detector, a communication module, and a compensation capacitor. The novel approach has been studied and evaluated for a MISO-WPT system having a 16 coils on primary side and one coil on secondary side having the double diameter. Results show that a standard microcontroller, in this case an STM32, is sufficient for the control of the whole system, so that the costs and the energy consumption are significantly reduced. An activation strategy has been proposed, which allows to determine the optimal transmitting coil for each position of the receiving coil and to switch it on. The time-to-start-charging at different positions of the receiving coil and different number of neighbors has been determined. It remains in all cases under 2.5 s.

Original languageEnglish
Article number1244
JournalEnergies
Volume13
Issue number5
Number of pages23
ISSN1996-1073
DOIs
Publication statusPublished - 07.03.2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 by the authors.

    Research areas

  • Contactless charging, Contactless power transmission, Inductive power transmission, MISO system, Multi-coil system; energy harvesting; wireless sensor node; passive peak detector; multiplexer, Resonant power transmission, Wireless power transmission
  • Engineering

DOI

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