Wireless charging system double-DD coupler and method and system for determining structural parameters of wireless charging system double-DD coupler

Abstract

The invention provides a wireless charging system double-DD coupler and a method and system for determining structural parameters of the wireless charging system double-DD coupler. The coupler comprises a primary side electric energy emission side and a secondary side electric energy pickup side, and the two sides are of a double-layer structure and formed by orthogonally overlapping two DD coilswith the same length and width. Moreover, the double-layer DD coil structure can be further covered with a ferrite shielding layer to enhance the coupling performance of the coupler. According to themethod and the system for determining the structural parameters of the coupler, the structural parameters of the coil are determined according to the output power level of the equipment to be charged,the coil design cost, the size limiting condition of an application scene, the volume limiting condition of a ferrite strip and the cost, and the structural parameters of the ferrite strip in the ferrite shielding layer are determined according to the structural parameters of the coil. According to the double-DD coupler, the output power of a wireless charging system is improved, the difficulty of cross coupling on system analysis is reduced, and the method and the system shorten the structural parameter analysis and processing period of the coupler.

Description

technical field [0001] The present invention relates to wireless power transmission technology, and more specifically, to a double DD coupler in a wireless charging system and a method and system for determining its structural parameters. Background technique [0002] Wireless Power Transfer (WPT for short) was first born in the United States in the 19th century. It is a new power access mode that realizes the transmission of electric energy from the source device to the power receiving device by means of space invisible soft media (such as magnetic field, electric field, laser, microwave, etc.). This technology achieves electrical isolation between power supply and power receiving equipment, so it fundamentally eliminates the problems of device wear, poor contact, and contact sparks caused by the traditional wired power supply mode. It is a clean, safe and flexible new power supply mode. It was selected as one of the top ten scientific research directions in the future by ...

AI Technical Summary

Problems solved by technology

[0004] The traditional wireless charging mode is single emission and single pickup, but due to the limited current resistance of the coil, the output power cannot be increased to a greater extent, so the dual emission-double pickup mode has become one of the effective methods to solve the limited output power

However, in the current magnetic coupling mechanism with dual emission and dual pickup structures, there is cross-coupling between multiple coils, which increases the complexity of system analysis and reduces system efficiency to a certain extent.

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