CN103078416A - Method for reducing eddy-current effect of magnetic steel - Google Patents
Method for reducing eddy-current effect of magnetic steel Download PDFInfo
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- CN103078416A CN103078416A CN2013100233100A CN201310023310A CN103078416A CN 103078416 A CN103078416 A CN 103078416A CN 2013100233100 A CN2013100233100 A CN 2013100233100A CN 201310023310 A CN201310023310 A CN 201310023310A CN 103078416 A CN103078416 A CN 103078416A
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- magnet steel
- magnetic steel
- current effect
- groove
- eddy current
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Abstract
The invention relates to a method for reducing the eddy-current effect of magnetic steel. Grooves are cut in the magnetic steel from the surface of the magnetic steel to the interior of a steel body of the magnetic steel, so that solid magnetic steel has gaps. The magnetic steel is designed and reformed on the basis of the specification and the solid shape of the conventional magnetic steel, and a current circuit in the magnetic steel is damaged to prevent the magnetic steel from generating a macroeddy current line and enable the magnetic steel to generate little eddy current, so that the service life of the magnetic steel is prolonged, and the product is kept stable.
Description
Technical field
The present invention relates to magnet steel performance field, especially a kind of method that reduces the magnet steel eddy current effect.
Background technology
Conductor is mobile or when being in the time dependent magnetic field, eddy current is the electric current of inducting in the above-mentioned situation lower conductor in non-uniform magnetic-field.This electric current forms the electric current line that a circle trap is closed in conductor, be called eddy current (claiming again Foucault current).Magnet steel is general bonding or be embedded on the rotor block, and magnet steel is in the machine operation process, and the inner eddy current effect that produces of magnet steel causes the magnet steel temperature to raise, and can reach 150C even higher.Along with the rising of temperature, magnetic property descends, and the operational efficiency of magnetic circuit and motor all obviously descends, thereby magnet steel is produced a photographic fixing, or even destructive temperatures involved.
The method that reduces the magnet steel eddy current effect in the present prior art has employing to process at magnet steel steel body, for example, the magnet steel that superposes again on the magnet steel that originally only has a magnet steel steel body forms double-decker, and is adopting insulating material in the two-layer magnet steel up and down.Although the eddy current effect that such method can to a certain extent less magnet steel is being the production in enormous quantities that is unfavorable for product with regard to production cost.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of method that reduces the magnet steel eddy current effect, on the basis of traditional magnet steel specification solid shape, magnet steel is carried out design improvement, destroy the current circuit in the magnet steel, avoid magnet steel to produce large vorticity line, make it to form less eddy current, thereby improve magnet steel useful life, keep product stable.
The technical solution adopted in the present invention is: a kind of method that reduces the magnet steel eddy current effect, be on magnet steel from the magnet steel surface to magnet steel steel vivo excision groove, make solid magnet steel have the gap.
If recess width of the present invention be 0.01mm ~ 3mm or recess width greater than 5mm, groove generally adopts epoxy coating to process or other, can play like this effect of insulation, also can not adopt coating to process; Groove also can adopt the coat of metal to process, and the described coat of metal comprises nickel coating, zinc coat and/or copper plate etc., can play like this effect of anti-oxidation, also can not adopt the coat of metal to process.
The cutting tool of cut-in groove of the present invention comprises wire-electrode cutting device or slicing machine device or other.
Magnet steel of the present invention can be cuboid magnet steel, watt type magnet steel, buffed top magnet steel, round magnet steel, annular magnetic steel and/or special-shaped magnetic steel or other various permanent magnet for motors.Its shape can be arbitrarily.
Groove quantity of the present invention is one or more; Can be according to design processing; Separation between a plurality of grooves equates.Separation also can be unequal according to demand.The groove location relation can be arranged in parallel also can be not parallel, can arbitrarily adjust according to demand.
Groove of the present invention is comprised of straight line and/or curve, does not limit the quantity of straight line and curve herein.
The position of further groove of the present invention is front-back grooving, is not limited to front-back grooving, also can about, groove is cut in the optional position on the three-dimensional dimension direction.
The invention has the beneficial effects as follows: changed the solid global shape of magnet steel, utilized and cut groove so that magnet steel is divided into the part of two or more isolation; Owing to the existence of one or two above grooves, destroy the electric current line of solid magnet steel integral body, make it to produce large vorticity line; Utilize the buffer action of groove that large vorticity line is resolved into little vorticity line, so that eddy current loss reduces, effectively saved the energy, and the useful life of the magnet steel that effectively improves, increased the stability of machine operation; And fluting operation of the present invention is simple, can too much not increase cost; According to quantity and the spacing of fluting, whole magnetic property can not descend too much.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of one embodiment of the invention;
Fig. 2 is the structural representation of another embodiment of the present invention;
Fig. 3 is the structural representation of another embodiment of the present invention;
Fig. 4 is the structural representation of another embodiment of the present invention;
Fig. 5 to Fig. 7 is the structural representation of other three embodiment of the present invention;
Among the figure: 1, magnet steel body; 2, groove.
Embodiment
The present invention is further detailed explanation with preferred embodiment by reference to the accompanying drawings now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
As shown in Figure 1, magnet steel body 1 is cuboid, and there are 2, three grooves of three grooves on the surface of magnet steel body 1 all on the same surface of magnet steel body by the cutting machine cut, and position relationship is for being parallel to each other, and the separation of three grooves all equates; And groove itself also is a uniform rectangle.
As shown in Figure 2, magnet steel body 1 is cuboid, is cut with two grooves 2 on the surface of magnet steel body, is cut with the 3rd groove on another surface corresponding with this surface simultaneously.Shape at same lip-deep two grooves is not identical, and one is rectangle, and another is the bodily form, and two groove is not parallel and spacing is also unequal; Then be irregular cell body at another lip-deep groove, because view relation can't directly be seen on Fig. 2.
As shown in Figure 3, the magnet steel body is that bread is block, and groove is arranged on the side of magnet steel body, can find out very intuitively from Fig. 3, and groove is directly to cut formation from two sides of magnet steel body.Groove is tile-shaped in the inside of magnet steel body.Same, because view relation can't directly draw from figure.
As shown in Figure 4, the magnet steel body is an irregular bulk, is cut with a groove identical with magnet steel body surface radian on the surface of magnet steel body.
Fig. 5 to Fig. 7 is the structural representation of other three embodiment of the present invention, and the present invention no longer does repeat specification herein.
Just the specific embodiment of the present invention of describing in the above specification, various not illustrating is construed as limiting flesh and blood of the present invention, the person of an ordinary skill in the technical field after having read specification can to before described embodiment make an amendment or be out of shape, and do not deviate from essence of an invention and scope.
Claims (4)
1. method that reduces the magnet steel eddy current effect is characterized in that: the method be on magnet steel from the magnet steel surface to magnet steel steel vivo excision groove, make solid magnet steel have the gap.
2. a kind of method that reduces the magnet steel eddy current effect as claimed in claim 1 is characterized in that: described recess width is that 0.01mm ~ 3mm or recess width are greater than 5mm.
3. a kind of method that reduces the magnet steel eddy current effect as claimed in claim 1 is characterized in that: described groove quantity is one or more; Has separation between a plurality of grooves.
4. a kind of method that reduces the magnet steel eddy current effect as claimed in claim 1, it is characterized in that: described groove is comprised of straight line and/or curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100233100A CN103078416A (en) | 2013-01-22 | 2013-01-22 | Method for reducing eddy-current effect of magnetic steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100233100A CN103078416A (en) | 2013-01-22 | 2013-01-22 | Method for reducing eddy-current effect of magnetic steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103078416A true CN103078416A (en) | 2013-05-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100233100A Pending CN103078416A (en) | 2013-01-22 | 2013-01-22 | Method for reducing eddy-current effect of magnetic steel |
Country Status (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332244A (en) * | 2014-10-27 | 2015-02-04 | 安徽蒙特尔电缆集团有限公司 | Environment-friendly flame-retardant anti-interference cable |
| EP3334010B1 (en) * | 2015-08-07 | 2023-12-13 | Robert Bosch GmbH | Rotor for use in motor and motor adopting same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002345189A (en) * | 2001-05-11 | 2002-11-29 | Nissan Motor Co Ltd | Permanent magnet embedded synchronous motor |
| JP2004260951A (en) * | 2003-02-27 | 2004-09-16 | Yaskawa Electric Corp | Permanent magnet type motor |
| CN1593000A (en) * | 2001-05-22 | 2005-03-09 | Lg电子株式会社 | Reciprocating motor |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
| CN101388272A (en) * | 2007-07-09 | 2009-03-18 | 大同特殊钢株式会社 | Magnet and manufacture method therof |
| CN203135594U (en) * | 2013-01-22 | 2013-08-14 | 江苏东瑞磁材科技有限公司 | Structure for reducing magnetic steel eddy current effects |
-
2013
- 2013-01-22 CN CN2013100233100A patent/CN103078416A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002345189A (en) * | 2001-05-11 | 2002-11-29 | Nissan Motor Co Ltd | Permanent magnet embedded synchronous motor |
| CN1593000A (en) * | 2001-05-22 | 2005-03-09 | Lg电子株式会社 | Reciprocating motor |
| JP2004260951A (en) * | 2003-02-27 | 2004-09-16 | Yaskawa Electric Corp | Permanent magnet type motor |
| CN101110289A (en) * | 2005-07-22 | 2008-01-23 | 信越化学工业株式会社 | Rare earth permanent magnet, its manufacturing method, and permanent magnet rotary machine |
| CN101388272A (en) * | 2007-07-09 | 2009-03-18 | 大同特殊钢株式会社 | Magnet and manufacture method therof |
| CN203135594U (en) * | 2013-01-22 | 2013-08-14 | 江苏东瑞磁材科技有限公司 | Structure for reducing magnetic steel eddy current effects |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104332244A (en) * | 2014-10-27 | 2015-02-04 | 安徽蒙特尔电缆集团有限公司 | Environment-friendly flame-retardant anti-interference cable |
| EP3334010B1 (en) * | 2015-08-07 | 2023-12-13 | Robert Bosch GmbH | Rotor for use in motor and motor adopting same |
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Application publication date: 20130501 |