Multiplexed Supply of a MISO Wireless Power Transfer System for Battery-Free Wireless Sensors

Ghada Bouattour, Mohamed Elhawy, Slim Naifar, Christian Viehweger, Houda Ben Jmaa Derbel and Olfa Kanoun
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Ghada Bouattour: Chair for Measurement and Sensor Technology, Technische Universität Chemnitz, Chemnitz 09111, Germany
Mohamed Elhawy: Chair for Measurement and Sensor Technology, Technische Universität Chemnitz, Chemnitz 09111, Germany
Slim Naifar: Chair for Measurement and Sensor Technology, Technische Universität Chemnitz, Chemnitz 09111, Germany
Christian Viehweger: Chair for Measurement and Sensor Technology, Technische Universität Chemnitz, Chemnitz 09111, Germany
Houda Ben Jmaa Derbel: Control and Energy Management Laboratory—Electrical Engineering Department—National Engineering School of Sfax, University of Sfax, 3038 Sfax, Tunisia
Olfa Kanoun: Chair for Measurement and Sensor Technology, Technische Universität Chemnitz, Chemnitz 09111, Germany

Energies, 2020, vol. 13, issue 5, 1-23

Abstract: 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.

Keywords: resonant power transmission; contactless power transmission; inductive power transmission; wireless power transmission; contactless charging; MISO system; multi-coil system; energy harvesting; wireless sensor node; passive peak detector; multiplexer (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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