LCC-S topology, wireless power transmission system and harmonic content suppression method

Abstract

The invention discloses an LCC-S topology, which is suitable for a wireless power transmission system and comprises a transmitting end and a receiving end, wherein the transmitting end comprises a voltage source U1, a first compensation capacitor Cf, a compensation inductor Lp, a transmitting coil Lt, a second compensation capacitor Ct and a third compensation capacitor Cp, and the first compensation capacitor Cf is sequentially connected with the compensation inductor Lp, the second compensation capacitor Ct and the transmitting coil Lt in series and then connected to the voltage output end of the voltage source U1; the third compensation capacitor Cp is connected in parallel with two ends of the transmitting coil Lt and the second compensation capacitor Ct which are connected in series;the receiving end comprises a receiving coil Ls and a fourth compensation capacitor Cs connected with the receiving coil Ls in series, and the receiving coil Ls is coupled with the transmitting coil Lt; the value of each inductor capacitor meets the following condition: [omega]Lp-1 / ([omega]Cf)=1 / ([omega]Cp)=[omega]Lt-1 / ([omega]Ct). According to the invention, the first compensation capacitor Cf isadditionally arranged at the transmitting end, and the high-order harmonic content of the current of the input end is effectively reduced by reasonably adjusting the value of the compensation inductor Lp, so that the burden of the power supply is reduced.

Description

technical field [0001] The invention relates to the technical field, in particular to an LCC-S topology, a wireless power transmission system and a harmonic content suppression method. Background technique [0002] Wireless power transfer technology is a non-contact power transfer technology. When the traditional power supply charges the device, it needs to connect the power supply and the device through the charging cable. The wireless power transmission technology can overcome a series of problems caused by the traditional wired charging method, such as: complicated wiring, easy aging of the charging plug, and the inability of the device to move flexibly. The safety and reliability of the equipment power supply is improved. In the field of electric vehicles, wireless charging technology has developed rapidly, providing a new charging method for electric vehicles, and wireless charging technology can reduce the dependence of electric vehicles on batteries, improve the conv...

AI Technical Summary

Problems solved by technology

In this application, the third harmonic energy is separately processed through the reverse injection link of the primary side harmonic energy and the load, and then superimposed back into the original high-frequency AC signal to eliminate the third harmonic content, and the design of the fundamental resonant network is simpler. Reduces the influence of system frequency stability and waveform distortion caused by changes in load or system structure, but the structure is more complex, the parameter value design of each device is difficult, and it can only be processed for the third harmonic energy, and it is difficult to deal with other higher harmonics Wave

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