Wireless electric energy transmission magnetic coupling structure and circuit of wireless electric energy transmission magnetic coupling structure

Abstract

The invention relates to a wireless electric energy transmission magnetic coupling structure, which comprises a magnetic structure at the transmission side and a magnetic structure at the receiving side. The structure is characterized in that the magnetic structure at the transmission side consists of a plurality of rectangular coils, the rectangular coils are distributed in a delta shape, the generated current flows and distributes between adjacent rectangular loops in a reverse flowing direction, the coils at the transmission side form a magnetic field transmission plane, the magnetic structure at the receiving side comprises coil groups which are respectively arranged in three orthogonal directions, and the coil groups respectively induce the magnetic field components in the three orthogonal directions. The structure has the advantages that the coupling coefficient is higher, the electric energy transmission efficiency is higher, the electromagnetic interference on the surrounding space is little, and the structure is widely applied to wireless electric energy transmission systems with various power grades.

Description

technical field [0001] The invention relates to a wireless energy transmission magnetic coupling structure and a circuit thereof, belonging to the field of energy transmission. Background technique [0002] Wireless inductive power transfer is the transmission of electric power through indirect electrical conduction. At present, the electric power is transmitted from the magnetic structure on the transmitting side (TX) to the magnetic structure on the receiving side (RX) through space induction mainly through high-frequency magnetic field coupling. In order to improve wireless power transmission To improve efficiency and reduce electromagnetic interference, the magnetic coupling structure on the transmitting and receiving sides becomes the key technology of wireless power transmission. Especially in many wireless charging applications, such as electric vehicle wireless inductive charging, desktop wireless inductive charging, etc., the receiving side is generally a certain di...

AI Technical Summary

Problems solved by technology

[0009] a. The magnetic induction coupling coefficient of the transmitting and receiving sides is low, and the power transmission efficiency is poor; especially, it cannot be well applied to the case where the magnetic structure of the receiving side is arbitrarily offset from the magnetic structure of the transmitting side;

[0010] b. The magnetic field leakage radiation range generated by the magnetic structure on the transmitting side is large, which will bring a wide range of electromagnetic interference problems

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