Foreign object detection in wireless energy transfer systems

摘要

A wireless energy transfer system includes a foreign object debris detection system. The system includes at least one wireless energy transfer source configured to generate an oscillating magnetic field. The foreign object debris may be detected by at least one field gradiometer positioned in the oscillating magnetic field. The voltage of the at least one field gradiometer may be measured using readout circuitry and a feedback loop based on the readings from the gradiometers may be used to control the parameters of the wireless energy source.

主权项

1. A foreign object debris detection system for a wireless energy transfer system, comprising:
at least one magnetic field sensor comprising at least one magnetic field gradiometer; and at least one readout circuit to measure electrical parameters of the at least one magnetic field sensor, wherein the at least one magnetic field sensor is positioned within a magnetic field of the wireless energy transfer system.