Wireless power transfer magnetic couplers

摘要

A magnetic coupler is disclosed for wireless power transfer systems. A ferrimagnetic component is capable of guiding a magnetic field. A wire coil is wrapped around at least a portion of the ferrimagnetic component. A screen is capable of blocking leakage magnetic fields. The screen may be positioned to cover at least one side of the ferrimagnetic component and the coil. A distance across the screen may be at least six times an air gap distance between the ferrimagnetic component and a receiving magnetic coupler.

主权项

1. A magnetic coupler, comprising:
a ferrimagnetic component capable of guiding a magnetic field, a wire coil wrapped around at least a portion of the ferrimagnetic component, and a screen capable of blocking leakage magnetic fields, the screen positioned to cover at least one side of the ferrimagnetic component and the coil, wherein the screen comprises a metamaterial, the metamaterial comprising printed circuit board (“PCB”) coils, the PCB coils comprising at least one full turn.