Hollow magnetic core device for wireless charging and wireless power supply

Abstract

The invention discloses a hollow magnetic core device for wireless charging and wireless power supply. The hollow magnetic core device comprises an excitation device for emitting electromagnetic energy and a receiving device for receiving the electromagnetic energy, wherein the excitation device comprises a flat magnetic core on which a first coil is wound; the receiving device comprises a square hollow magnetic core on which a second coil is wound; a magnetic core plane parallel resonant electromagnetic coupling mode is adopted for the flat magnetic core and the square hollow magnetic core. According to the device, the magnetic core design is adopted for both the excitation device and the receiving device, so that the coupling efficiency of the excitation device and the receiving device is improved, the wireless charging and wireless power supply efficiency are further greatly improved, and the whole device is smaller in size; a circuit of a wirelessly-powered or wirelessly-charged electronic device can be totally or partially placed in the square hollow magnetic core, so that the interference of an electromagnetic field emitted by the excitation device or other electromagnetic fields is avoided.

Description

technical field [0001] The invention relates to the field of electromagnetic coils, in particular to a hollow magnetic core device for wireless charging and wireless power supply. Background technique [0002] For convenience, more and more electronic devices in the prior art are equipped with wireless power supply or wireless charging. However, the existing wireless power supply or wireless charging technology needs to align the position and direction of the excitation coil and the receiving coil, otherwise the efficiency of wireless power supply or wireless charging will be greatly affected, and sometimes it will not work at all. [0003] In practical application, it is not easy to align the position and direction of the excitation coil and the receiving coil in many applications, for example, it is difficult for electronic devices buried in the human body to meet this requirement. [0004] Chinese invention patent application CN103070699A discloses a wireless smart charg...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a hollow magnetic core device for wireless charging and wireless power supply. The invention solves the problems that the excitation coil and the receiving coil need to be aligned in position and direction, and improves the efficiency of wireless charging and wireless power supply. See below for details describe:

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