CN1591708A

CN1591708A - Ring surface unipolar integrated ring magnet and its magnetizing method

Info

Publication number: CN1591708A
Application number: CN 03153884
Authority: CN
Inventors: 柯寅昌; 柯寅盛
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-08-27
Filing date: 2003-08-27
Publication date: 2005-03-09

Abstract

The present invention relates to a toroidal unipolar integrated ring magnet and its magnetizing method. Said ring magnet uses isotropic magnet as base material, and is a complete ring body made up by adopting direct integrated forming process. The magnetizing head is placed on one end face of said ring body, and the exises of both of them are formed into a straight line, then the ring body is magnetized, then another face of said ring body is magnetized by adopting identical mode, so that the internal toroidal face and external toroidal face of said ring body respectively have opposite unipolarity, i.e. the external toroidal face of said ring body is formed into single S pole or N pole, and its internal toroidal face is formed into opposite N pole or S pole. Said invention solves the defect of this unipolar ring magnet formed by using assembly mode in existent technology.

Description

Toroidal unipolar integrated ring magnet and magnetization method thereof

Technical field

The present invention relates to a kind of toroidal unipolar integrated ring magnet and magnetization method thereof, relate in particular to the integral type annular magnet that a kind of inner and outer ring mask has opposite single polarity, and the magnetization method of making this magnet.

Background technology

The range of application of present artificial permanent magnet is very extensive, as motor, stationery, toy, switch, camera etc.Along with the material of making magnet and the continuous advancement in technology that magnetizes, the increasing different shape magnet different with the magnetic pole state is developed.Artificial permanent magnet mainly is divided into ferrite lattice (Ferrite Magnets) and metamagnet two big classes such as (Metal Magnets).Wherein ferrite lattice mainly is made up of di-iron trioxide (Fe2O3) and brium carbonate (BaCO3) or strontium carbonate (SrCO3).The metallic magnetic iron rule comprises that samarium-cobalt alloy magnet (SmCo Magnets), alnico alloy magnet (Alnico Magnets) and neodymium iron boron (NdFeB Magnets claims rare earth element magnet (Rare-EarthMagnets) again) etc. are several.According to having or not of handling of directed magnetization in the magnet manufacture process and can divide into two types of isotropism (Isotropic) and anisotropy (Anisotropic) etc., and anisotropy can be divided into two kinds of magnetic field orientation and mechanical orientations.That the magnetic field orientation is divided into is radial, axially, radially with four kinds of the two poles of the earth anisotropy (Polar Anisotropic) etc.

Recently the magnetic suspension rotor motor research and develop successfully, and because of its rotating speed height, characteristics that noise is low are subjected to the market attention gradually, especially the computer module to golf calorific value has more importance.Its needed magnet is exactly the annular permanent magnnet that a kind of inside and outside anchor ring has single opposite magnetic pole respectively.As shown in Figure 1, a little annular magnet 2 is fixed on the rotor 1, and little annular magnet 2 is inserted in the big annular magnet 3 that is fixed on the stator.The inside and outside anchor ring of these two annular magnets 2,3 all has the polarity of single opposite magnetic pole, and the polar configurations of the two is an inverse state, the adjacent anchor ring that makes two annular magnets 2,3 is same magnetic pole, promptly between the inner ring surface of the outer ring surface of little annular magnet 2 and big annular magnet 3, form uniform repulsion, get final product unsettled fixed rotor 1 thus, make fixed rotor 1 and extraneous without any Mechanical Contact, it is minimum that the frictional force of fixed rotor 1 when rotating is reduced to, and significantly improves the efficient of motor.

Made the annular magnet of this polar configurations, all be to adopt the assembly type processing method in the past.Promptly use two 1/2nd ring bodies or four 1/4th ring body moulding respectively.As shown in Figure 2, be a kind of typical 1/4th ring body assembly types.After the ring body moulding of each part, the magnetization of being magnetized respectively again makes its inside and outside anchor ring have single opposite polarity separately, bind into a complete annular solid more at last, but there is great shortcoming in the one pole annular magnet of making in this way:

The first, an annular solid is resolved into a plurality of parts, moulding respectively, magnetize, made up again at last, manufacture process is very complicated.By quartering shown in Figure 2 as can be seen, must be through four moulding, magnetizing for four times adds the annular magnet that last combination just can be made a required polarity again, this manufacturing procedure makes manufacturing cost very high.

Second, in the process that the each several part annular solid is binded, because of these annular solids have all had magnetic, therefore must form the arctic on the composition surface to the arctic, the South Pole dual repulsion to the South Pole, make the process of binding become very difficult, these repulsion also very easily make the composition surface produce lateral run-out, not only bind to be difficult for, and rate of finished products are also extremely low.

The 3rd, the structural strength of the existing annular magnet made from assembly type a little less than, its composition surface also has the error that is difficult to avoid to exist, add the effect of above-mentioned repulsion, more increased the difficulty that engages, make the circularity extreme difference of this annular magnet, thereby make between the big or small annular magnet of rotor and stator the crack in different size.And the magnetic force of each part annular solid is difficult to reach just the same, and the repulsion between the big or small annular magnet can't be consistent.The magnetic suspension motor that such annular magnet is used for running up (this is exactly that to reduce frictional force designed for high-speed motor for the floating rotor of magnetic), very easily phenomenons such as generation rotary speed unstabilization and vibration because of the inconsistent of repulsion.

Content of the present invention

Main purpose of the present invention is to provide a kind of toroidal unipolar integrated ring magnet.The annular solid that this annular magnet is formed in one has inside and outside anchor ring and is the characteristic of single opposite polarity separately.Its manufacture process only needs one-shot forming and maximum twice processes of magnetizing to finish.And do not need to bind, so do not bind the repulsion problem fully, significantly simplified manufacturing process, when having shortened worker, and do not have because bind the rate of finished products problem on the low side that difficulty is caused, and can significantly improve the circularity and the magnetic force uniformity of annular solid, solve all problems of prior art fully.

Another object of the present invention is to provide a kind of magnetization method of toroidal unipolar integrated ring magnet, (Isotropic Magnets) is base material with isotropic magnet, be directly formed to a complete annular solid, the axis that magnetized head is placed on the end face of this annular solid and makes the two in line, then annular solid is magnetized, magnetized in the other end in the same manner again, can make the inner ring surface of annular solid have opposite single polarity respectively with outer ring surface.

Toroidal unipolar integrated ring magnet of the present invention and magnetization method thereof have obvious effects such as the manufacture process of simplification and raising rate of finished products, and can significantly improve the circularity and the magnetic force uniformity of annular solid.

Brief description of drawings

Fig. 1 is the schematic diagram of the application of annular magnet in the electromagnetic levitation type rotor motor of the single polarity of anchor ring;

Fig. 2 is the structural representation of annular magnet of the single polarity of anchor ring of prior art;

Fig. 3 is the stereogram of the embodiment of the invention;

Fig. 4 is the end face front view of the embodiment of the invention;

Fig. 5 is the magnetization method schematic diagram of the embodiment of the invention.

Embodiment

Fig. 3, Fig. 4 are stereogram and the end face front view of integral type annular magnet embodiment of the present invention.As shown in Figure 3, Figure 4, the integral type annular magnet that the present invention is formed in one, its base material are isotropic magnet.The utmost point has single opposite polarity to being configured to inner ring surface 4 respectively with outer ring surface 5, and promptly inner ring surface 4 is the equally distributed single southern S utmost point, and 5 of outer ring surfaces are the single northern N utmost point.Can certainly be the opposite utmost point to configuration (promptly the polarity of inside and outside anchor ring is exchanged), and formed magnetic boundary is centered close between 4,5 of the inner and outer rings between the south poles, and forms one and the body concentric circle of this annular.

Above-mentioned magnet need just can be made through specific magnetization method.As shown in Figure 5, at first go out required annular solid 6 with isotropic magnet is one-body molded, again a magnetized head 7 of being made up of coil 71 and magnetic conduction heel piece 72 is placed on the end face of annular solid 6, and the axis that makes the two in line, then magnetized head 7 sent electric excitatory.Annular solid 6 is through after the magnetization of magnetized head 7, and its inside and outside anchor ring will have single polarity separately.This magnetization method can make annular solid produce needed polarity.If but the height of annular solid 6 is big or have mutually isomagnetic occasion in the both ends of the surface that need annular solid 6, can magnetize once more with the other end of 7 pairs of annular solids 6 of magnetized head, the magnetic force of the both ends of the surface of annular solid 6 is equated, and do not influence its polar configurations.This secondary magnetization method can guarantee that annular solid 6 has best magnetic state.

Toroidal unipolar integrated ring magnet of the present invention and magnetization method thereof have obvious effects such as the manufacture process of simplification and raising rate of finished products, have high practicality, and do not have public offering before this and used, and file an application according to Patent Law.The above is the explanation of one embodiment of the invention only, is not to be used for limiting claim of the present invention, and the equivalent transformation that other utilizes technological means of the present invention to do all is included in the claim of the present invention.

Claims

1. a toroidal unipolar integrated ring magnet is characterized in that with isotropic magnet be base material, direct one-body molded one complete annular solid, and described annular solid inner ring surface has opposite single polarity respectively with outer ring surface.

2. the magnetization method of a toroidal unipolar integrated ring magnet, it is characterized in that, earlier go out needed annular solid, again a magnetized head is placed on the end face of described annular solid with isotropic magnet is one-body molded, the axis that makes the two in line, again to described magnetized head energization excitation.

3. magnetization method as claimed in claim 2 is characterized in that, after magnetizing for the first time, with magnetized head is magnetized in the other end of described annular solid again.

4. as claim 2 or 3 described magnetization methods, it is characterized in that described magnetized head is made up of coil and magnetic conduction heel piece.