Anti-offset lcc-s wireless power transfer system and its parameter design method

Abstract

The invention discloses an anti-offset LCC-S type wireless power transmission system and its parameter design method, including a full-bridge inverter module, an LC filter module, a primary-side LCC compensation network, a transmission coil, a secondary-side compensation network and a load . The full-bridge inverter module can generate high-frequency AC square waves to provide power input for the system. The LC filter module is respectively connected with the full-bridge inverter module and the primary side LCC compensation network, which can filter out harmonic components other than the fundamental frequency component in the input square wave. The primary-side LCC compensation network is connected to the primary-side coil in the transmission coil. By designing the component parameters of the primary-side LCC compensation network with an appropriate method, the wireless power transmission system can maintain the relative output power of the system within a wide range of coupling coefficients. Stablize. The secondary side compensation network forms a series resonance with the secondary side coil in the transmission coil, and finally delivers the power to the load. The system of the invention realizes stable power output within a wide range of coupling coefficients, which 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 LCC-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 LCC-S wireless power transmission system

Images