Patent ID: 11936208
Assignee: KONINKLIJKE PHILIPS N.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. The power transmitter of claim 14, further comprising at least two pluralities of balanced detection coils,
wherein the at least two pluralities of balanced detection coils comprises the first plurality of balanced detection coils and at least a second plurality of balanced detection coils,
wherein the second plurality of balanced detection coils comprises a third detection coil and a fourth detection coil,
wherein the third detection coil and the fourth detection coil are arranged such that signals induced in the first detection coil by an electromagnetic field generated by the transmitter coil is compensated by a second signal induced in the second detection coil by the electromagnetic field generated by the transmitter coil;
wherein and the foreign object detector circuit is arranged to perform foreign object detection in response to an output signal from the second plurality of balanced detection coils.