Impedance matching system and method for wireless charging
An impedance matching and wireless charging technology, applied in the direction of collectors, electric vehicles, electrical components, etc., can solve the problem that the power amplifier cannot output power normally, the input impedance of the LC resonant coil at the transmitter end does not match the equivalent internal resistance of the power amplifier, and the transmitter end The LC resonant coil has problems such as large impedance changes, to ensure normal output power, avoid equivalent internal resistance mismatch, and prevent excessive impedance changes.
Active Publication Date: 2020-07-31
SHENZHEN INST OF ADVANCED TECH
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Problems solved by technology
[0004] Embodiments of the present invention provide a wireless charging impedance matching system and method, which can solve the problem that in the prior art when the receiving end is in a moving state, the impedance of the LC resonant coil at the transmitting end will change greatly, causing the LC resonant coil at the transmitting end to change greatly. The input impedance does not match the equivalent internal resistance of the power amplifier, which leads to technical problems that the power amplifier cannot output power normally.
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[0026] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present invention.
[0027] see figure 1 , figure 1 It is a schematic structural diagram of the wireless charging impedance matching system in the first embodiment of the present invention. In the embodiment of the present invention, the wireless charging impedance matching system includes a first transmitting end 10, a second transmitting end 20, a receiving en...
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The invention discloses a wireless charging impedance matching system and method. The wireless charging impedance matching system comprises two transmitting ends, a receiving end and an MCU; each of the two transmitting ends comprises a power amplifier, an impedance matching network, a transmitting end LC resonant coil and a detection module separately; and the receiving end module comprises a receiving end LC resonant coil. Compared with the prior art, the input impedance of the transmitting end can be detected by the detection module; next, the network type of the impedance matching networkcan be determined according to the input impedance of the transmitting end, and next, a corresponding impedance matching network is established, so that when the receiving end is in a mobile state, overhigh impedance change of the transmitting end LC resonant coil is prevented and the problem of mismatching between the input impedance of the transmitting end LC resonant coil and the equivalent internal resistance of the power amplifier can be avoided, thereby ensuring normal output power of the power amplifier.
Description
technical field [0001] The present invention relates to the technical field of wireless charging, in particular to a wireless charging impedance matching system and method. Background technique [0002] With the increase of mobile electronic devices, the voice of wireless charging in the market is also getting higher and higher. Wireless charging can make users get rid of the dependence on the charging cable, and realize free charging anytime and anywhere, which greatly increases the user experience and the convenience of product application. Among them, magnetic resonance wireless charging technology, as one of the mainstream wireless charging technologies, has the advantages of long transmission distance and high efficiency, and has gradually become the future development direction of the wireless charging market. [0003] At present, magnetic resonance wireless charging technology products all need to make a charging board (including single or multiple transmitting end L...
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IPC IPC(8): H02J50/40H02J50/12H02J7/00
CPCH02J7/025H02J50/12H02J50/40
Inventor 赵毓斌须成忠刘小镜
Owner SHENZHEN INST OF ADVANCED TECH