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Manufacturing method of magnet and magnetization method of magnet

A manufacturing method and magnet technology, applied in the field of magnet manufacturing, can solve problems such as difficulty in mass production and low productivity

Active Publication Date: 2022-04-26
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the conventional Halbach magnet manufacturing method has the problems of low productivity and difficulty in mass production

Method used

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  • Manufacturing method of magnet and magnetization method of magnet
  • Manufacturing method of magnet and magnetization method of magnet
  • Manufacturing method of magnet and magnetization method of magnet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0145] Next, examples of the present invention will be described.

example 1

[0147] Halbach magnets are produced by the following method.

[0148] First, three sintered neodymium magnets (manufactured by Neomag Co., Ltd.) were prepared in which the easy magnetization axes of the magnet particles were oriented in one direction.

[0149] These magnets are demagnetized by heating and then processed into predetermined dimensions to obtain the first to third unmagnetized magnet materials.

[0150] The first unmagnetized magnet material has a substantially rectangular parallelepiped shape and has dimensions of 7 mm long x 6.7 mm wide x 2 mm high. In the first unmagnetized magnet material, the magnetization easy axes of the magnet particles were oriented in the height direction (direction parallel to the 2 mm sides). The second unmagnetized magnet material has the same size as the first unmagnetized magnet material. However, in the second unmagnetized magnet material, the easy magnetization axes of the magnet particles were oriented in the horizontal direct...

example 2

[0160] Using the same method as Example 1, make a Halbach magnet.

[0161] However, in this Example 2, the size of each unmagnetized magnet material was changed to 7 mm long x 6.7 mm wide x 3 mm high. Other production conditions are the same as Example 1.

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Abstract

A method for manufacturing a magnet, the manufacturing method comprising: (1) preparing three or more unmagnetized magnet materials whose easy magnetization axes are oriented in a predetermined direction, and bonding each unmagnetized magnet material to each other to form an assembly step; and (2) applying a curvilinear pulsed magnetic field to the assembly to magnetize the assembly, wherein, through the step of (2), each unmagnetized magnet material becomes a magnet block, and at least An angle θ (where 0≦θ≦180°) formed by the magnetization directions of one group of adjacent magnet blocks is in the range of 30° to 120°.

Description

technical field [0001] The invention relates to a method for manufacturing a magnet and a method for magnetizing the magnet. Background technique [0002] A generator that converts mechanical kinetic energy transmitted from an engine etc. into electrical energy, or a motor (electric motor) that converts electrical energy into mechanical kinetic energy conversely is used in equipment such as machine tools, vehicles, aircraft, and wind prime movers. [0003] In recent years, so-called Halbach magnets have been proposed in order to further improve the magnetic properties of permanent magnets used in devices such as motors of this type. [0004] A Halbach magnet is a magnet constituted by combining a plurality of permanent magnet blocks in an array called a Halbach array. In Halbach magnets, by optimizing the orientation of the magnetic poles of the individual permanent magnet pieces, it is possible to increase the magnetic field strength in a specific direction. [0005] <...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F7/02H01F13/00H01F41/02H02K15/03
CPCH02K15/03H01F41/0273H01F13/003H01F7/0205H01F41/0253H01F7/02B22F3/24B22F2202/05
Inventor 藤川宪一齐藤正一朗久米克也山本贵士
Owner NITTO DENKO CORP