Device and method for foreign object detection in wireless energy transfer

Erik Lemmen (Uitvinder), Tom van Grunsven (Uitvinder), Danny Vos (Uitvinder)

Onderzoeksoutput: OctrooiOctrooi-publicatie

Samenvatting

Apparatus for wireless power transfer, comprising a power transfer coil (111) configured for inductive power transfer and defining a first plane, a foreign object detecting device comprising at least one detection coil (31) defining a second plane substantially parallel to the first plane. The foreign object detecting device comprises a driver circuit coupled to the at least one detection coil for generating a magnetic field with the at least one detection coil and a control unit coupled to the driver circuit and configured to measure a value representative of a damping of the magnetic field. Each of the at least one detection coil is positioned relative to the power transfer coil such that a magnetic flux generated by the power transfer coil through a first portion (311) of the first area and through a second portion (312) of the first area, taking account of a polarity of the detection coil in the first portion and in the second portion, are of opposite sign and of substantial equal magnitude resulting in the detection coil having a magnetic coupling coefficient with respect to the power transfer coil of 0.2 or less.
Originele taal-2Engels
OctrooinummerEP3685198
IPCB60L50/50,G01V3/10,H02J50/60,H02J7/02
Prioriteitsdatum22/09/17
Indieningsdatum22/09/17
StatusGepubliceerd - 29 jul 2020

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