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

A wireless power transmission, LCC-S technology, applied in harmonic reduction devices, AC networks to reduce harmonics/ripples, current collectors, etc. Complexity and other problems, to reduce the high-order harmonic content, the fundamental wave component is not affected, and the effect of reducing the burden on the power supply

Inactive Publication Date: 2020-04-28
JIANGSU FRONTIER ELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Embodiment 1

[0032] combine figure 1 , the present invention mentions an LCC-S topology suitable for a wireless power transfer system, the left side is the transmitting end circuit of the wireless power transfer system, and the right side is the receiving end circuit of the wireless power transfer system. The transmitter circuit contains a voltage source U 1 , compensation inductance L p , Transmitting coil L t , and compensation inductance L p The first compensation capacitor C in series f , and the transmitting coil L t The third compensation capacitor C in parallel p , the transmitting coil L t There is a second compensation capacitor C in series t . The receiving end circuit includes the receiving coil L s , and receiving coil L s The fourth compensation capacitor C in series s , R in the figure L Indicates the load.

[0033] At the transmitting end of the wireless power transfer system, each inductance and capacitance meet the following conditions:

[0034] ω L p -1 / (ωC...

Embodiment 2

[0043] As another embodiment of the present invention, the present invention also provides a wireless power transmission system, which adopts the aforementioned LCC-S topology.

Embodiment 3

[0045] As yet another embodiment of the present invention, the present invention also provides a harmonic content suppression method for a wireless power transmission system, using the aforementioned LCC-S topology, and adjusting the compensation inductance L at the transmitting end according to the system frequency ω p value, so that it satisfies the following conditions: ωL p -1 / (ωC f )=1 / (ωC p )=ωL t -1 / (ωC t ).

[0046] Aspects of the invention are described in this disclosure with reference to the accompanying drawings, which show a number of illustrated embodiments. Embodiments of the present disclosure are not necessarily defined to include all aspects of the present invention. It should be appreciated that the various concepts and embodiments described above, as well as those described in more detail below, can be implemented in any of numerous ways, since the concepts and embodiments disclosed herein are not limited to any implementation. In addition, some aspe...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02J7/02H02J3/01
CPCH02J3/01H02J50/12Y02E40/40
Inventor 翟学锋王金虎王成亮郑海雁徐妍杨庆胜陈宵许道强
Owner JIANGSU FRONTIER ELECTRIC TECH
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