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Flux concentrator and method of making a magnetic flux concentrator

A technology of flux concentrators and magnets, which is applied in the direction of transformer/inductor casings, the application of magnetic films to substrates, and parts of transformers/inductors. It can solve the problem of increasing the outline of consumer devices and the current flux concentrator being too thick And other issues

Active Publication Date: 2012-07-18
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Current flux concentrators suitable for use with wireless charging systems are generally too thick and thus add significantly to the profile of the consumer device

Method used

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  • Flux concentrator and method of making a magnetic flux concentrator
  • Flux concentrator and method of making a magnetic flux concentrator
  • Flux concentrator and method of making a magnetic flux concentrator

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Embodiment Construction

[0039] figure 1 A flow diagram of a method for manufacturing a flux concentrator according to an embodiment of the present invention is illustrated in and generally designated 100 . Method 100 generally includes the steps of: 1) combining 102 soft magnetic powder, binder, solvent, lubricant (e.g., external and / or internal lubricant); 2) combining at least soft magnetic powder, binder , solvent, lubricant mixed 104 for sufficient time to dissolve the binder in the binder to generate the mixture; 3) evaporate the solvent 106, such as by heating and / or applying a vacuum to the mixture; 4) mold the mixture to forming a flux concentrator; and 5) curing 110 the flux concentrator at a temperature sufficient to cure the adhesive. Although the materials are all combined, the combining need not occur immediately prior to or simultaneously with mixing. For example, lubricant(s) may be combined with other materials at any time before the solvent is evaporated. In embodiments with more ...

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Abstract

A flux concentrator and method for manufacturing a flux concentrator is provided. The method can include combining powdered soft magnetic material, a binder, a solvent, a internal lubricant; mixing the materials to create a mixture, evaporating the solvent from the mixture, molding the mixture to form a flux concentrator, and curing the flux concentrator. The flux concentrator may be laminated and broken into multiple pieces, which makes the flux concentrator more flexible. Breaking the flux concentrator does not significantly affect the magnetic properties. Since the permeability of the binder is very similar to that of air, adding tiny air gaps between the fractions is not significantly different than adding more binder.

Description

technical field [0001] The present invention generally relates to magnetic flux concentrators and methods of making magnetic flux concentrators. Background technique [0002] Magnetic flux concentrators (sometimes referred to as flux guides, flux focusers, flux enhancers, flux splitters, flux controllers, flux reflectors, and other names) are generally known and have been used in induction heating and Inductive power transfer is used in these applications. Flux concentrators enhance the magnetic field in certain regions and can assist in increasing efficiency in electrical energy transfer or heat transfer. In the absence of a concentrator, the magnetic field is likely to spread out and intersect with any conductive surroundings. In some cases, a flux shield can be a flux concentrator. [0003] Soft magnetic materials (ie, materials that become magnetized when an external magnetic field is applied) are sometimes used in the manufacture of flux concentrators. Soft magnetic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F38/14H01F41/14H01F27/02H01F5/06
CPCH01F1/375H01F1/26H01F27/327H01F27/255H01F38/14H01F5/06H01F41/14
Inventor D·W·巴曼J·K·施万内克R·M·小泰勒M·J·诺尔康克W·T·小斯通纳K·J·特纳T·J·伯沃德M·E·迈尔斯
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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