ACTIVE AND ADAPTIVE FIELD CANCELLATION FOR WIRELESS POWER SYSTEMS

摘要

This disclosure provides methods and apparatus, including computer-readable media, for wireless power transfer and particularly active cancellation of undesirable electric or magnetic field emissions from a wireless power transmitter. In one aspect, the disclosure provides for an apparatus including a sensor, controller, and emitter, wherein the sensor is used to sense the electric or magnetic field emissions from a transmit antenna, the controller configured to determine the undesirable components of the field, and the emitter to generate a field to destructively interfere with the undesirable components.

主权项

1. A method for reducing unwanted emissions in a system for wirelessly transferring power via a magnetic field at a resonant frequency, the method comprising:
sensing a field, via a sensor, generated by a wireless power transmit antenna; generating a signal representative of a portion of the sensed field; and driving an emitter based at least in part on the signal to generate a field which reduces at least part of the portion of the sensed field.