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wireless charging system

A wireless charging and capacitor technology, applied in current collectors, electric vehicles, electrical components, etc., can solve the problems of complex harmonic composition and large electromagnetic compatibility, and achieve the effects of low interference noise, reduced interference, and high efficiency transmission

Active Publication Date: 2021-02-02
BEIJING INVISPOWER TECH CO LTD
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Problems solved by technology

[0003] Patent CN110126648A "Self-optimized tuning control method for electric vehicle wireless charging maximum current tracking" proposes a method of adjusting the operating frequency of the inverter to obtain the maximum output current through frequency conversion control, because the frequency conversion adjustment will make the voltage and current contain Abundant high-order harmonics, and the composition of the harmonics is very complex due to the frequent adjustment of the operating frequency. The electromagnetic noise energy of these harmonics will form electromagnetic interference through circuit connection or electromagnetic wave space coupling, which will cause great damage to the system itself and the surrounding environment. EMC problems

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Embodiment Construction

[0026] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0027] see figure 1 with figure 2 , the wireless charging system of the present invention has a transmitting end Tx and a receiving end Rx. The transmitter Tx converts the power-frequency alternating current provided by the power source 1 into direct current after rectification and power factor adjustment by the direct current converter 2 . The direct current is then converted into high-frequency alternating current by the inverter 3 . The high-frequency alternating current passes through the resonant network 4 at the transmitting en...

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Abstract

The invention discloses a wireless charging system, which is divided into a transmitting end and a receiving end; the transmitting end is provided with a transmitting end resonance network, wherein the transmitting end resonance network at least comprises a transmitting coil and a first capacitor; a receiving end resonance network is arranged at the receiving end, wherein the receiving end resonance network at least comprises a receiving coil and a second capacitor; at least one end of the transmitting end and the receiving end is provided with a correction device, and the correction device isone or two of a correction inductor and a correction capacitor; when the correction device is the correction inductor, the correction device is connected with the transmitting coil or the receiving coil in series; and when the correction device is the correction capacitor, the correction device is connected in parallel with the first capacitor or the second capacitor. According to the wireless charging system, the total capacitance value or the total inductance value of the transmitting end resonance network and the receiving end resonance network is adjusted through the correction device, sothat the resonance stability is ensured, the interference of an environmental electromagnetic field is reduced, and the maximum efficiency transmission and the minimum interference noise are obtained.

Description

technical field [0001] The invention relates to the field of wireless charging, in particular to a wireless charging system. Background technique [0002] Wireless charging is a non-contact energy transmission method, which can realize the safe and efficient use of energy. Especially for electric vehicles with automatic driving and automatic parking, wireless charging can effectively support the whole process of unmanned operation of the vehicle. It is a new energy An important direction of automobile development. The wireless transmission of electric energy is realized by exciting the alternating electromagnetic field. In order to obtain greater power transmission, it is necessary to increase the strength of the electromagnetic field; on the other hand, because the electromagnetic field energy is excited in an open space, wireless charging will inevitably involve Electromagnetic compatibility (EMC) issues. [0003] Patent CN110126648A "Self-optimized tuning control method...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J7/02H02J50/70H02J50/40
CPCH02J7/02H02J50/12H02J50/40H02J50/70
Inventor 王哲陆钧贺凡波葛俊杰马俊超
Owner BEIJING INVISPOWER TECH CO LTD
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