Field element

A magnetic field and component technology, applied in electrical components, magnetic circuit rotating parts, magnetic circuits, etc., can solve problems such as magnet demagnetization, and achieve the effects of preventing demagnetization, reducing demagnetization, and increasing the area of ​​magnetic poles

Inactive Publication Date: 2009-06-10
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 fie

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0062] figure 1 and figure 2 All schematically show the same field element 1a according to this embodiment. The field element 1 a has a field section 2 and a connection section 3 , and is rotatable around a rotation axis 92 extending along a predetermined direction 91 . In addition, in figure 2 In , the magnetic field part 2 and the connection part 3 are shifted and shown along the rotation axis 92 .

[0063] The magnetic field unit 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 is preferably a sintered rare earth magnet. This is because the rare earth magnet has a large magnetic flux density. In this case, eddy current loss tends to occur in the rare earth magnet...

no. 2 approach

[0090] Figure 8 and Figure 10 The field elements 1b and 1c according to the present embodiment are schematically shown, respectively. The field elements 1b and 1c have the field part 2 and the connection part 3 similarly to the field element 1a. In addition, in Figure 8 and Figure 10 In , the magnetic field part 2 and the connection part 3 are shifted and shown along the rotation axis 92 . Hereinafter, points different from the field element 1 a described in the first embodiment will be described. In addition, in Figure 8 and Figure 10 In the above, 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 about the magnetic field part 2, but it is not limited to this as in the first embodiment.

[0091] Figure 9 and Figure 11 A section through the field elements 1b, 1c with respect to the circumferential direction 93 is shown in each case. In any of the field elements 1b, 1...

no. 3 approach

[0104] Figure 14 A field element 1d according to this embodiment is schematically shown. The field element 1 d has a field portion 2 , a connection portion 3 , and a magnetic core 5 . The magnetic field unit 2 is the same as the first embodiment ( figure 1 etc.) are constructed in the same way.

[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 portions 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] Magnetic core 5 may also be a member in which electromagnetic steel sheets are laminated. 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 . It is not preferable to use a member in which the magnetic steel sheets are lam...

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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 and 11b 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 electrical machine. Background technique [0002] An axial gap type rotating electrical machine has a field element and an armature, and is preferable because it can be thinned and the torque density can be increased by increasing the magnetic pole area. [0003] Thrust is generated in an axial gap type rotating electrical machine, but for example, by arranging two field elements on opposite sides with respect to one armature, or by arranging two armatures at opposite sides to each other with respect to one field element, it is possible to Eliminates thrust generated in rotating electrical machines. [0004] In particular, the case where two armatures are provided with respect to one field element is preferred. This is because, since the number of field elements normally used as a rotor is one, airflow loss can be reduced. [0005] In addition, Paten...

Claims

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Application Information

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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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