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Field element

A component and magnetic field technology, applied in the field of magnetic field components, can solve problems such as demagnetization of magnets, and achieve the effects of preventing demagnetization, reducing demagnetization, and increasing the area of ​​magnetic poles

Inactive Publication Date: 2012-05-23
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, these magnets are susceptible to demagnetizing fields, and the magnets have the potential to become demagnetized

Method used

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Experimental program
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Effect test

no. 1 approach

[0062] figure 1 with figure 2 Both schematically show the same magnetic field element 1a according to this embodiment. The magnetic field element 1a has a magnetic field part 2 and a connection part 3, and is capable of rotating around a rotating shaft 92 extending in a predetermined direction 91. In addition, in figure 2 In the figure, the magnetic field part 2 and the connection part 3 are shown staggered along the rotation axis 92.

[0063] The magnetic field part 2 has a magnet 11 and magnetic plates 21 and 22. The magnet 11 has a first magnetic pole surface 11 a and a second magnetic pole surface 11 b having mutually different polarities in a predetermined direction 91. For example, the first magnetic pole surface 11a has an N pole, and the second magnetic pole surface 11b has an S pole.

[0064] The magnet 11 preferably uses a sintered rare earth magnet. This is because the magnetic flux density of rare earth magnets is large. In this case, although eddy current loss is...

no. 2 approach

[0090] Figure 8 with Picture 10 The magnetic field elements 1b and 1c according to this embodiment are schematically shown, respectively. The magnetic field elements 1b and 1c have the magnetic field part 2 and the connection part 3 like the magnetic field element 1a. In addition, in Figure 8 with Picture 10 In the figure, the magnetic field part 2 and the connection part 3 are shown staggered along the rotation axis 92. Hereinafter, points different from the magnetic field element 1a described in the first embodiment will be described. In addition, in Figure 8 with Picture 10 In the magnetic field portion 2, the case where the magnetic plates 21 and 22 are respectively provided on the magnetic pole surfaces 11a and 11b of the same magnet 11 is shown, but it is the same as the first embodiment and is not limited to this.

[0091] Picture 9 with Picture 11 The cross sections of the magnetic field elements 1b and 1c with respect to the circumferential direction 93 are show...

no. 3 approach

[0104] Figure 14 The magnetic field element 1d according to this embodiment is schematically shown. The magnetic field element 1d has a magnetic field part 2, a connection part 3 and a magnetic core 5. The magnetic field part 2 and the first embodiment ( figure 1 Etc.) The same structure.

[0105] The magnetic core 5 is provided between the magnetic field portions 2 adjacent in the circumferential direction 93 so as to be separated from the magnetic field portion 2. In addition, it is preferable to use a dust core for the magnetic core 5. This is because the eddy current loss generated in the magnetic core 5 can be reduced.

[0106] The magnetic core 5 may be a member formed by laminating electromagnetic steel sheets. From the viewpoint of reducing iron loss, it is preferable to use a member in which electromagnetic steel sheets are laminated in the circumferential direction 93. With a member in which electromagnetic steel sheets are laminated in a predetermined direction 91, ...

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PUM

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Abstract

The invention provides a magnetic field element. It is an object to prevent demagnetization of magnets. A magnetic field element 1a includes magnetic field portions 2 and a coupling portion 3 and is rotatable on a rotation axis 92 along a given direction 91. Each magnetic field portion 2 includes a magnet 11 and magnetic plates 21 and 22. The magnet 11 includes first and second pole faces 11a and11b having different polarities from each other in the given direction 91. The magnetic-material plates 21 and 22 are provided on the first and second pole faces 11a and 11b, respectively. The magnetic field portions 2 are annularly arranged along a circumferential direction 93 around the rotation axis 92 and spaced in the circumferential direction 93 from one another. The coupling portion 3 is made of a non-magnetic material and couples the magnetic field portions 2 to one another.

Description

Technical field [0001] The present invention relates to a field element, which can be applied to an axial gap type rotating electric machine. Background technique [0002] The axial gap type rotating electric machine has a field element and an armature, and is preferable in terms of being able to be thinned and in terms of being able to increase the torque density by increasing the magnetic pole area. [0003] In an axial gap type rotating electrical machine, thrust is generated. However, for example, by arranging two field elements on opposite sides of one armature, or arranging two armatures on opposite sides of one field element, it is possible to Eliminate the thrust generated in the rotating electric machine. [0004] In particular, it is preferable to provide two armatures with respect to one magnetic field element. This is because since there is only one magnetic field element that is generally used as a rotor, the airflow loss can be reduced. [0005] In addition, Patent Lit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/27H02K1/02H02K1/22
CPCH02K1/2793H02K1/02H02K1/2795H02K1/22H02K1/27
Inventor 中增伸近藤俊成浅野能成
Owner DAIKIN IND LTD
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