Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof

A technology of wireless energy transmission and design method, applied in the direction of coil, including printed electrical components, electrical components, etc., can solve the problem of less self-resonant frequency, quality factor design and optimization, affecting transmission distance and transmission efficiency, inductance and Small stray capacitance, etc., to reduce the design difficulty, avoid the separation from the resonance state, and the effect of large inductance

Active Publication Date: 2013-01-16
TSINGHUA UNIV
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  • Abstract
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Problems solved by technology

[0005] 3. Improve its quality factor (Q value) as much as possible, this parameter will greatly affect the transmission distance and transmission efficiency;
[0008] At present, although there have been wireless energy transmission systems using PCB resonant coils at home and abroad, most of them are simple single-layer coils with small inductance and stray capacitance, which makes the self-resonant frequ...

Method used

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  • Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof
  • Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof
  • Double-layered snail-shaped PCB coil for wireless energy transfer and design method thereof

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Embodiment Construction

[0045] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0046] figure 1 It is a structural schematic diagram of a double-layer spiral PCB coil for wireless energy transmission provided by the present invention. figure 1 Wherein, the coil includes a substrate, a top layer coil, a bottom layer coil and a via array;

[0047] Wherein, the top layer coil is installed on the substrate; the bottom layer coil is installed under the substrate; the via hole array is located on the substrate for connecting the top layer coil and the bottom layer coil; the top layer coil and the bottom layer coil adopt square, circular or polygonal structures ( figure 1 Take a square coil as an example). The top layer coil spirals from outside to inside in a spiral shape, and is connected to the bo...

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Abstract

The invention discloses a double-layered snail-shaped PCB (Printed Circuit Board) coil for wireless energy transfer and a design method thereof, and belongs to the technical field of wireless energy transfer. The technical scheme adopted is that the coil comprises a baseplate, a top layer coil, a bottom layer coil and a through-hole array, wherein the top layer coil is mounted on the baseplate; the bottom layer coil is mounted below the baseplate; and the through-hole array is positioned on the baseplate and used for connecting the top layer coil and the bottom layer coil. Meanwhile, the invention also provides a design method of the coil. According to the invention, a PCB technology is adopted to fabricate resonance coil for wireless energy transfer so as to ensure the precision and stability of self-resonant frequency of the coil; and meanwhile, the coils are placed on the upper and the lower layers of the PCB, so that larger inductance quantity is obtained in a limited baseplate size, the stray capacity of the coil is increased, and the self-resonant frequency is reduced.

Description

technical field [0001] The invention belongs to the technical field of wireless energy transmission, and in particular relates to a double-layer spiral PCB coil for wireless energy transmission and a design method thereof. Background technique [0002] Magnetically coupled resonant wireless energy transfer technology has developed rapidly in recent years. Compared with traditional inductive wireless energy transmission, this technology can extend the transmission distance to 2 to 3 times the diameter of the coil while maintaining a transmission efficiency of more than 50%, and has better electromagnetic compatibility. In this transmission system, the transmitting coil and the receiving coil are self-resonant coils with the same resonance frequency, and the design has the following requirements: [0003] 1. It has high mechanical stability and design and manufacturing precision to ensure the accuracy of its self-resonant frequency; [0004] 2. It has a certain amount of str...

Claims

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Application Information

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IPC IPC(8): H05K1/16H01F5/00H02J17/00H02J50/12
Inventor 陈凯楠赵争鸣贺凡波张艺明
Owner TSINGHUA UNIV
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