Asymmetric four-coil resonator and wireless power transmission system with asymmetric four-coil resonator

Abstract

The invention discloses an asymmetric four-coil resonator which comprises a primary side and a secondary side, the primary side comprises a transmitting coil and two repeating coils, and the transmitting coil and the two repeating coils are located on the same plane; and the secondary side is a load coil serving as a receiving coil. The invention further discloses a wireless electric energy transmission system with the asymmetric four-coil resonator. The high-frequency high-power inverter comprises an asymmetric four-coil resonator, a high-frequency high-power inverter power supply, an inverter circuit, a rectifying circuit and a load, the asymmetric four-coil resonator is mainly composed of a transmitting coil, a receiving coil and two relay coils, wherein the transmitting coil and the two repeating coils are located on the same plane to serve as a primary side, the secondary side is a load coil to serve as a receiving coil, the high-frequency high-power inverter power supply and theinverter circuit are located on the primary side, and the rectifying circuit and the load are located on the secondary side. The two relay coils are asymmetrically close to the source coil, compared with symmetrical four-coil transmission, the asymmetric coupling model can model circuits of the two relay coils to the primary side, the equivalent inductance value of the primary side is further improved to reduce the current value of the primary side, and therefore the transmission efficiency is improved.

Description

technical field [0001] The invention relates to an asymmetric four-coil resonator. [0002] The invention relates to a wireless power transmission system, in particular to a wireless power transmission system with an asymmetric four-coil resonator. Background technique [0003] In recent years, with the rapid development of electric vehicles, many key issues need to be solved, among which the research on charging technology of electric vehicles is a hot spot and difficult point. The traditional charging scheme is contact charging, that is, using the charging socket to obtain energy from the grid, and using the power conversion method to transfer the power from the grid to the battery through a power converter. Compared with the contact charging method, wireless power transmission technology, also known as non-contact power transmission, has great advantages. It uses electromagnetic fields or electromagnetic waves for energy transmission, gets rid of traditional cables, and ...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of low transmission efficiency of wireless power transmission, the present invention provides an asymmetric four-coil resonator and a wireless power transmission system with an asymmetric four-coil resonator, which can effectively improve transmission efficiency

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