Anti-offset SS type wireless power transmission system based on variable compensation element parameters

Abstract

The invention discloses an anti-offset SS type wireless power transmission system based on variable compensation element parameters. The system comprises a high-frequency power voltage source, a transmitting side resonant capacitor module, a current sampling module, a controller, a transmitting coil, a receiving coil, a receiving side resonant capacitor and a load. One output end of the high-frequency power voltage source, the transmitting side resonant capacitor module, the transmitting coil, one port of the current sampling module and the other output end of the high-frequency power voltage source are sequentially connected, and the transmitting side resonant capacitor module is composed of at least two switched capacitor branches connected in parallel. The switched capacitor branch is formed by connecting a transmitting side switch and a transmitting side resonant capacitor in series; and the other port of the current sampling module is connected with the controller, the controller is connected with all the transmitting side switches, the receiving coil is connected with the receiving side resonant capacitor, the receiving side resonant capacitor is connected with the load, and the load is connected with the receiving coil. The system has anti-offset performance, communication between the transmitting side and the receiving side is not needed, and the structure is simple.

Description

technical field [0001] The present invention relates to the technical field of wireless power transmission, in particular to an anti-offset SS type wireless power transmission system based on variable compensation component parameters. Background technique [0002] In recent years, wireless power transmission technology has been vigorously developed. The biggest difference between it and the traditional charging method is that no physical contact is required during the charging process. This excellent characteristic makes wireless power transfer technology widely used in many fields, such as electric vehicles, portable electronic products, biomedical implants, etc. This technology can greatly improve the convenience of charging, and at the same time effectively solve the problems of cluttered charging lines and plugging and wearing of charging interfaces. [0003] In the process of wireless charging, the offset problem of the coil on the transmitting side and the coil on t...

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Problems solved by technology

[0004] In order to improve the anti-offset ability of the wireless power transmission system, researchers have proposed multi-layer PCB type, bipolar BP type, three-pole TPP type and DDQ type magnetic coupling coils in consideration of the direction of optimizing the magnetic coupling coil. The coil structure improves the tolerance of the wireless power transmission system to the offset of the coil on the receiving side, but the coil structure is complex and requires high structural design, which will lead to problems such as increased volume and weight, and difficulties in production.

[0005] In order to improve the anti-offset capability of the wireless power transmission system, researchers have proposed SP / S type, PS / S type, LCC / S type, S-LCC / LCC-S type, and LCC-LCC type respectively from the perspective of compensation topology. / SS type and PS-PS / SS type compensation topology, the anti-offset ability of the above-mentioned compensation topology increases with the increase of its compensation order, but the anti-offset ability of the wireless power transmission system has a great influence on the parameters The higher the sensitivity, the more compensation components there are, the more obviously the system performance will be adversely affected by the parameter drift phenomenon

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