Offset-resistant clc-s wireless power transfer system and its parameter design method

Abstract

The invention discloses an anti-offset CLC-S type wireless power transmission system and a parameter design method thereof. The anti-offset CLC-S type wireless power transmission system comprises a full-bridge inversion module, an LC filtering module, a primary side CLC compensation network, a transmission coil, a secondary side compensation network and a load, the full-bridge inversion module cangenerate high-frequency alternating-current square waves to provide electric energy input for the system; the LC filtering module is connected with the full-bridge inversion module and the primary side CLC compensation network and filters out harmonic components, except for fundamental frequency components, in the input square waves. The primary side CLC compensation network is connected with theprimary side coil in the transmission coil, and element parameter design is performed on the primary side CLC compensation network through a proper method so that the wireless power transmission system can maintain the relative stability of the system output power in a wide coupling coefficient range. And the secondary side compensation network and a secondary side coil in the transmission coil form series resonance, and finally power is transmitted to the load. The system provided by the invention can realize stable power output in a relatively wide coupling coefficient range, and is beneficial to improving the anti-offset capability.

Description

technical field [0001] The present invention relates to the technical field of wireless power transmission, in particular to an anti-offset CLC-S type wireless power transmission system and a parameter design method thereof. Background technique [0002] The magnetic coupler is usually used as the carrier of the wireless power transmission system to realize the energy transmission from the transmitting end to the receiving end. During the static charging process, it is often difficult to achieve complete alignment between the transmitting coil and the receiving coil. In general, the larger the offset between the coils, the smaller the coupling coefficient. At the same time, the change of the coupling coefficient will directly cause the reflection impedance to decrease by the square multiple, which will further cause the output of the wireless power transmission system to fluctuate greatly. . At the same time, compared with static charging, dynamic wireless charging needs to...

AI Technical Summary

Problems solved by technology

When the mutual inductance between the coils changes due to the physical offset of the coils, that is, the coupling coefficient between the coils changes, the wireless power transfer system can still achieve the fluctuation of the output power within an allowable error range through the self-regulation of the compensation network, thus Solve the problem that the output power of the system fluctuates greatly when the coil is offset in the traditional CLC-S wireless power transmission system

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