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Application of composite shielding layer

A technology of composite shielding layer and shielding layer, applied in the field of electromagnetics, can solve the problems of heavy weight, high cost, unsuitable for high-power electrical equipment or machines, etc., and achieve the effect of low weight and low cost

Pending Publication Date: 2021-07-13
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing shielding layers for DD-type magnetic couplers all have the disadvantages of large volume, heavy weight and high cost
CN201910515945X discloses a composite shielding layer for wireless power transmission magnetic couplers. The composite shielding layer is composed of fan-shaped ferrite magnetic sheets, nanocrystalline strips and aluminum foil, and is suitable for small Electrical equipment, not suitable for high-power electrical equipment or machines

Method used

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  • Application of composite shielding layer
  • Application of composite shielding layer
  • Application of composite shielding layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The composite shielding layer described in this embodiment can be used in wireless power transmission DD-type magnetic couplers. The composite shielding layer includes a transmitting mechanism shielding layer and a receiving mechanism shielding layer. The transmitting mechanism shielding layer consists of three layers of shielding layers. The innermost layer (close to the coil) is a ferrite magnetic sheet 3, the middle layer is a nanocrystalline strip material 2, and the outermost layer is an aluminum foil 1; the innermost layer of the shielding layer of the receiving mechanism (close to the coil) is a ferrite magnetic sheet 6, The middle layer is nanocrystalline strip material 7, the outermost layer is aluminum foil 8, the receiving mechanism is fixed on the metal plate 9, the transmitting coil 4 is arranged inside the ferrite magnetic sheet 3 of the shielding layer of the transmitting mechanism, and the receiving coil 5 is arranged on the transmitting mechanism Inside ...

Embodiment 2

[0021] In this embodiment, the composite shielding layer described in Embodiment 1 is applied to the wireless charging of electric forklifts, the switching frequency is 85kHz, and the output power is 360W. The transmitting coil 4 is arranged inside the ferrite magnetic sheet 3 of the transmitting mechanism shielding layer, and the receiving coil 5 is arranged inside the ferrite magnetic sheet 6 of the shielding layer of the receiving mechanism, the receiving mechanism is fixed on the metal base plate 9, and the transmission distance is between the receiving coil 4 and the transmitting coil 5 .

[0022] In this embodiment, the transmitting coil and the receiving coil are DD type wound, and adopt the same size, the coil length is 240mm, the width is 150mm, and the thickness is 5mm. The transmission distance between the receiving coil 5 and the receiving coil 5 is 60mm; the results of the ferrite magnetic sheets 3 and 6 are as follows Figure 7 As shown, the shape of a single mag...

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Abstract

The invention belongs to the technical field of electromagnetism, and relates to application of a composite shielding layer. A composite shielding layer composed of a hexagonal ferrite magnetic sheet, a nanocrystalline strip and an aluminum foil is used for a wireless power transmission DD type magnetic coupler, and a transmitting coil is arranged on the inner side of the ferrite magnetic sheet of a transmitting mechanism shielding layer. The receiving coil is arranged on the inner side of a ferrite magnetic sheet of a shielding layer of the receiving mechanism, the receiving mechanism is fixed on the metal bottom plate, a transmission distance is reserved between the receiving coil and the transmitting coil, a single magnetic sheet of the ferrite magnetic sheet is hexagonal, all the magnetic sheets are uniformly arranged in parallel, and an air gap is reserved between the magnetic sheets; the thickness of the whole shielding layer is smaller than the thickness of a single-layer or double-layer shielding layer used for a DD type magnetic coupler at present, the weight and the cost are low, and the shielding layer can be widely applied to a wireless electric energy transmission system.

Description

Technical field: [0001] The invention belongs to the technical field of electromagnetism and relates to the application of a composite shielding layer. The composite shielding layer composed of hexagonal ferrite magnetic sheets, nanocrystalline strips and aluminum foil is used in a DD-type magnetic coupler for wireless energy transmission. Background technique: [0002] Electromagnetic coupler (also known as magnetic coupler) is the link between the transmitting and receiving ends of electromagnetic induction and electromagnetic resonance wireless power transmission (charging) systems. The design of its structure and parameters will directly affect the performance of the system. The existing electromagnetic coupler consists of two parts, the energy transmitting mechanism and the energy receiving mechanism, such as figure 1 As shown in the dotted box in , the energy transmitting mechanism consists of transmitting coil L p , shielding layer S p The corresponding energy recei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/70H01F27/36H01F38/14
CPCH02J50/70H01F27/36H01F38/14
Inventor 王春芳李冬雪杨凌云
Owner QINGDAO UNIV