Coil, wireless charging transmitting and receiving device and mobile terminal
A coil device and wireless charging technology, applied in the field of electric power, can solve the problem of low coil quality factor, and achieve the effects of reducing skin effect, reducing AC loss, and reducing proximity effect
Pending Publication Date: 2021-09-07
ZHEJIANG JINGRI LIGHTING TECH
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Problems solved by technology
[0004] Aiming at the problem of low quality factor of the coil in the limited space and area in the prior art, the present invention provides a coil, a wireless charging transmitting and receiving device and a mobile terminal, which can realize a coil with constant space and size. situation, improve the quality factor, and obtain better electricity efficiency
Method used
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Embodiment 1
[0040] This scheme is aimed at the quality factor of the coil in the case of limited space area, and optimizes the design of the coil structure on the original process;
[0041] For a fixed operating frequency, the quality factor Q mainly depends on the geometric shape of the coil, the size and number of turns of the coil, the material used and the internal wiring structure of the coil.
[0042] The internal resistance Rs of the coil mainly includes DC resistance and AC resistance. In a low-frequency environment, the current density in the conductor is relatively evenly distributed, and Rs is mainly determined by the DC resistance, namely:
[0043]
[0044] In the formula, ρ represents the resistivity of the coil-wound conductor material, l represents the total length of the coil-wound conductor material, and A represents the sum of the cross-sectional area of each coil of conductor. It can be seen from the formula that under the premise of using conductors of the same ma...
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Abstract
The invention discloses a coil, a wireless charging transmitting and receiving device and a mobile terminal, and belongs to the technical field of electric power. Aiming at the problem of low coil quality factor in limited space and area in the prior art, the invention provides the coil, the wireless charging transmitting and receiving device and the mobile terminal, and according to the scheme, coil structure optimization design is carried out on the basis of the original process under the condition that the coil quality factor is in the limited space and area; and filling wires are arranged among leads at intervals, so that the alternating current loss of the whole coil can be effectively reduced to the maximum extent. And the proximity effect and the skin effect are reduced, the quality factor of the coil is ensured, the better quality factor can be obtained under a certain area and volume, and the better charging efficiency is obtained.
Description
technical field [0001] The present invention relates to the field of electric power technology, and more specifically, relates to a coil, a wireless charging transmitting and receiving device and a mobile terminal. Background technique [0002] With the development of technology, the existing technology of wireless charging of electronic equipment is to realize the wireless transmission of electric energy through electromagnetic induction. For wireless charging based on electromagnetic induction, the quality factor (Q factor) of the wireless charging coil is the key factor affecting the charging efficiency. . The higher the figure of merit, the lower the proportion of power loss, that is, the higher the charging efficiency. The quality factor of the wireless charging coil is related to the impedance and inductance of the wireless charging coil. However, in order to reduce the resistance of the wireless charging coil and increase the inductance of the wireless charging coil...
Claims
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IPC IPC(8): H02J50/12H02J50/70H02J7/04H01F5/00H01F5/04
CPCH02J50/12H02J50/70H02J7/04H01F5/00H01F5/04
Inventor 程世友戴飞陈莉娟范俊杰
Owner ZHEJIANG JINGRI LIGHTING TECH