A Loosely Coupled Planar Wireless Power System for Multiple Receivers

Wireless power transfer is demonstrated mathematically and experimentally for M primary coils coupled to N secondary coils. Using multiple primary coils in parallel has advantages over a single primary coil. First, the reduced inductance of the transmitting coils makes the amplifier less sensitive t...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 56; no. 8; pp. 3060 - 3068
Main Authors Casanova, J.J., Zhen Ning Low, Jenshan Lin
Format Journal Article
LanguageEnglish
Published New York IEEE 01.08.2009
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Charging
Circuits
Coils
Feasibility
Impedance
Inductance
Inductive coupling
Inverters
Joining
Load flow
Power systems
Receivers
Receiving
Student members
Topology
Transmission
wireless power transfer
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Summary:Wireless power transfer is demonstrated mathematically and experimentally for M primary coils coupled to N secondary coils. Using multiple primary coils in parallel has advantages over a single primary coil. First, the reduced inductance of the transmitting coils makes the amplifier less sensitive to component variations. Second, with multiple receiving coils, the power delivery to an individual receiver is less sensitive to changes in the loads attached to other coils. By using a 16 cm by 18 cm primary and a 6 cm by 8 cm secondary coil, going from a 1:2 coupling to a 2:2 coupling, we show an increase in received power from 1.8 to 9.5 W, with only a small change in coupling efficiency. The advantages of the multiple primary coil topology increase the feasibility of charging multiple wireless portable devices simultaneously.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2009.2023633