Electromagnetic shielding device and method for wireless power transmission, wireless power transmission system
A technology of wireless power transmission and electromagnetic shielding, which is applied in the direction of circuit devices and electrical components, etc., can solve problems affecting user experience, increase the thickness of transmitting devices and receiving devices, and cannot effectively eliminate electromagnetic radiation, so as to improve user experience , Avoid charging speed, reduce cost effect
Inactive Publication Date: 2018-12-07
LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD
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Problems solved by technology
[0012] The embodiment of the present invention provides an electromagnetic shielding device for wireless power transmission to solve the problem of increasing the thickness of the transmitting device and the receiving device when eliminating electromagnetic radiation, sacrificing the charging speed and affecting the user experience of the user in the prior art. The technical problem that electromagnetic radiation cannot be effectively eliminated when the transmitting device and the receiving device are not aligned
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[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. Here, the exemplary embodiments and descriptions of the present invention are used to explain the present invention, but not to limit the present invention.
[0035] In an embodiment of the present invention, an electromagnetic shielding device for wireless power transmission is provided, such as figure 1 As shown (taking the transmitting coil as an example), the device includes:
[0036] A plurality of shielding coils 101, a plurality of said shielding coils are distributed in the transmitting coil 102 and / or receiving coil ( figure 1 (not shown in ), the magnetic field direction of each shielding coil is opposite to the radiation magnetic field direction of the transmitting coil and the receiving coil, for canceling the radiation magnetic field of...
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An embodiment of the invention provides an electromagnetic shielding device and an electromagnetic shielding method for wireless power transmission, and a wireless power transmission system. The electromagnetic shielding device comprises a plurality of shielding coils, wherein the plurality of shielding coils are distributed around a transmitting coil and / or a receiving coil of the wireless powertransmission system, a magnetic field direction of each of the shielding coils is opposite to a radiating magnetic field direction of the transmitting coil and the receiving coil, and the shielding coils are used for counteracting radiating magnetic fields of the transmitting coil and the receiving coil. According to the electromagnetic shielding device and the electromagnetic shielding method, aradiating magnetic field generated by a leakage magnetic field in the case where the transmitting coil and the receiving coil are aligned or severe magnetic field radiation generated by the leakage magnetic field in the case where the transmitting coil and the receiving coil are not aligned can be counteracted by setting the plurality of shielding coils around the transmitting coil and / or the receiving coil, the thickness of a transmitting device and a receiving device is not increased, and the user experience of the user can be improved.
Description
technical field [0001] The invention relates to the field of new energy technologies, in particular to an electromagnetic shielding device and method for wireless power transmission, and a wireless power transmission system. Background technique [0002] With the implementation of energy conservation and emission reduction policies, the market for new energy vehicles, especially electric vehicles or hybrid vehicles, has developed rapidly. Correspondingly, the market demand for charging equipment is also increasing day by day. Wireless charging has broad application prospects in the field of electric vehicle charging due to its advantages of automation, no need for manual operation, and no influence from bad weather. At present, wireless charging has been applied in low-power fields, such as mobile phones and tablet computers. However, due to the high charging power requirements of electric vehicles (for example, above 3.3kW), the electromagnetic radiation generated by high...
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IPC IPC(8): H02J50/70
Inventor 梅营蔡骊李岩罗雪肖
Owner LG ELECTRONICS CHINA RANDD CENT SHANGHAI CO LTD