JPS6224603A - Cubic magnet assembly - Google Patents

Abstract

PURPOSE:To obtain a permanent magnet device capable of composing a magnetic circuit in which magnetic stability is easily and freely available, by making three-dimensional composition in which both permanent magnets and soft magnetic yokes, dimensionally similar and cube-shaped, are made to neighbor to each other, without each of the permanent magnets or each of the soft magnetic yokes themselves respectively neighboring to each other on their composition surfaces. CONSTITUTION:With an assembly having composition elements of permanent magnets 1, dimensionally similar and cube-shaped, in plural numbers, and soft magnetic yokes 2 in plural numbers, a three-dimensional composition is made so that the permanent magnets 1 and soft magnetic yokes 2 are made to neighbor at one or more positions of the cube composition surfaces, however, each of the permanent magnets 1 and each of soft magnetic yokes 2 are not made to neighbor on with each other on the respective cube composition surfaces. Hence, a magnetic circuit having magnetic stability can be freely composed, and various kinds of multi-polar magnetization, hard to perform, can be realized without limitations of dimensions and shapes, and besides the simulation of the magnetic circuit can be easily performed.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a permanent magnet device.

[Prior art and problems to be solved by the invention] So-called permanent magnets obtained by magnetizing a single block of hard magnetic material are used in all industries, either alone or in a composite form with various yokes. Widely used. However, this type of permanent magnet is often subject to restrictions on size, shape, etc. when magnetizing or designing a magnetic circuit.

In addition, it requires a lot of effort to experimentally study the magnetic circuit, and furthermore, it has disadvantages such as difficulty in multipolar anisotropic magnetization.

The present invention has been made in view of the current situation. That is, there are two objectives of the present invention.

An object of the present invention is to provide a permanent magnet device that can easily and freely configure a magnetic circuit having magnetic stability.

[Failure to solve the problem]

The device of the present invention is constructed by preparing a large number of cubes of permanent magnets and soft magnetic yokes, and combining them so that they are arranged alternately in any axial direction of the cubes. In other words, according to the present invention, there is provided an assembly including a plurality of cube-shaped permanent magnets having the same dimensions and a plurality of soft magnetic yokes as constituent elements, wherein the permanent magnets and the soft magnetic yokes are located at at least one location. There is obtained a cubic magnet assembly characterized in that the permanent magnets and the soft magnetic yokes are adjacent to each other on the cube-forming surfaces, but are not adjacent to each other on the key-forming surfaces.

The permanent magnet used in the present invention may be a magnetized hard magnetic material consisting of a cube shape of the same size, such as commercially available alnico magnets, iron/chromium/cobalt magnets,
Many materials can be used, such as ferrite magnets, rare earth cobalt magnets, and various plastic magnets.

The soft magnetic yoke may be made of a material that has a cube shape with the same dimensions as the above-mentioned permanent magnet and has a saturation magnetic flux density greater than the residual magnetic flux density of the above-mentioned permanent magnet.

Examples of such a soft magnetic yoke material include - Rolled steel material for membrane structure (SS material).

Pure iron, silicon iron, rimalloy, semendur.

Examples include Sendust.

Below today 〔Example〕 Next, examples of the present invention will be described.

(Embodiment 1) FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention.
, (a) shows the structure of the obtained rectangular parallelepiped cubic magnet assembly and its constituent elements, the permanent magnet key 1 and the yoke cube 2,
, y, and z-axis directions can be set to arbitrary values (6, 6.2 in this case) in minimum structural unit steps. The arrow marked on the cube 2 indicates the direction of magnetization. or.

(b), (e), and (d) are perspective views showing examples of simple magnetic circuit configurations, and it has been experimentally confirmed that the configurations have magnetic stability in all cases. that's all(
, ) to (d) In any case, a solid body in which a permanent magnet and a soft magnetic yoke are adjacent to each other on at least one cube forming surface, and the permanent magnets and soft magnetic yokes are not adjacent to each other on each cube forming surface. The structure is as follows. In other words, it has a three-dimensional configuration commonly called a checkered pattern.

(Example 2) (a), (b), and (e) in Fig. 2 are permanent magnet cubes with a − side length of 1 crn (Tohoku Metal Industry Co., Ltd.).
Figures 1 and 2 are diagrams showing examples of various combinations of cubic magnet assemblies consisting of nine yoke cubes of the same size as the permanent magnet cubes, and nine yoke cubes of the same size as the permanent magnet cubes. is a diagram showing the magnetic field strength in the X direction on the α-β line on the three assemblies described above, and it can be seen that the magnetic field distribution changes depending on the change in the element configuration. In other words, the simulation of the magnetic properties of magnets with the same volume and different shapes is performed using a combination of a permanent magnet and a yoke (the magnetization direction of the permanent magnet is +X y 'I
This can be easily done by simply changing ``r'' (which can be set in any direction).

(Example 3) (,) and (b) in FIG. 3 are made of the same material as the permanent magnet cube and yoke cube used in Example 2.

FIG. 6 is a diagram showing another example of a combination of key-bic magnet assemblies composed of elements of the same size.

Similarly, (c) shows the magnetic field strength in the X direction on the α'-β' line of the assembly, and in this case as well, changing the magnetic field distribution is extremely easy by partially changing (adding) the element configuration. It turns out that you can do it. Furthermore, this figure 3 (
The configuration of the assembly in Figure 2 (,) is the same as that in Figure 2 (,), except that the line positions for measuring the magnetic field strength are α-β and α′-.
The difference is indicated by β'.

〔Effect of the invention〕

As explained above in the embodiments, there are nine key-bic magnet assemblies according to the present invention.

It is possible to freely configure magnetic circuits with magnetic stability, and various multipolar magnetizations that are difficult to magnetize can be performed without restrictions on size and shape, and furthermore, magnetic circuit simulation can be easily performed. It has the advantage of being able to perform

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of two embodiments of the present invention. (,) show a rectangular parallelepiped-shaped cupic magnet assembly and its constituent elements, a permanent magnet and a unit key of a soft magnetic yoke; (b), (e),
(d) shows a simple example, and FIG. 2 is a diagram showing the configurations (a), (b), (e) and magnetic field distribution (d) of other embodiments of the present invention. FIG. 3 is a diagram showing the configuration (a), (b) and magnetic field distribution (c) of still another embodiment. Explanation of symbols: 1 represents a permanent magnet key, and 2 represents a soft magnetic yoke cube. 11th: C(2) /“ \. (b) (C) γ ζ (d) Figure 3 CC)

Claims (1)

[Claims] 1. An assembly consisting of a plurality of cube-shaped permanent magnets with the same dimensions and a plurality of soft magnetic yokes as constituent elements, wherein the permanent magnets and the soft magnetic yokes are arranged on at least one cube-forming surface. A cubic magnet assembly characterized in that the permanent magnets and the soft magnetic yokes are adjacent to each other and have a three-dimensional configuration in which the permanent magnets and the soft magnetic yokes are not adjacent to each other on each cube-constituting surface.