CN208596977U - A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant - Google Patents
A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant Download PDFInfo
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- CN208596977U CN208596977U CN201821416599.7U CN201821416599U CN208596977U CN 208596977 U CN208596977 U CN 208596977U CN 201821416599 U CN201821416599 U CN 201821416599U CN 208596977 U CN208596977 U CN 208596977U
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Abstract
The utility model discloses a kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant, it is related to motor device technical field, the anti-demagnetization magnet steel of the high temperature resistant includes at least one block of high-coercive force magnet steel and at least one block of low-coercivity magnet steel, high-coercive force magnet steel is set to the demagnetization region in permanent magnet machine rotor, and low-coercivity magnet steel is set to the increasing magnetic area in permanent magnet machine rotor；Or high-coercive force magnet steel is set to the strong demagnetization region in permanent magnet machine rotor, low-coercivity magnet steel is set to the weak demagnetization region in permanent magnet machine rotor；Adjacent two blocks of magnet steel constitute combination magnetic steel of magnetoelectric machine by adhesive bonding.The anti-demagnetization magnet steel of the rare-earth permanent-magnet electric machine high temperature resistant of the utility model, by the way that the bonding magnetic steel of unlike material or magnetic property is constituted combination magnetic steel of magnetoelectric machine, the surface for combining magnetic steel of magnetoelectric machine is handled using insulating coating, while not reducing magneto performance, the cost of magnetic steel material is significantly reduced, while effectively improving the anti-demagnetization capability of magnet steel.
Description
Technical field
The utility model relates to motor device technical fields, and in particular to a kind of anti-demagnetization of rare-earth permanent-magnet electric machine high temperature resistant
Magnet steel.
Background technique
In recent years, rare-earth permanent-magnet electric machine field is grown rapidly, especially permanent-magnetic wind driven generator, new-energy automobile driving electricity
Fast development and the extensive application of machine, air conditioner compressor motor, industrial rare earth permanent-magnetic energy-saving electric machine, to magneto high temperature resistant
More stringent requirements are proposed for the cost control of permanent-magnet material.
It generallys use to improve in rare earth permanent-magnetic material at present and grasps coercitive mode, the high-temperature stability of Lai Tigao material.
Coercivity is grasped in rare earth permanent-magnetic material in order to improve, and needs to be added the heavy metals rare earth elements such as dysprosium (Dy), terbium (Tb).With Dy,
The increase of Tb additional amount, coercivity raising is grasped in rare earth permanent-magnetic material, and the heat resistance of material can also improve.Dy, Tb belong to dilute
Resource is lacked, it is expensive, with the fast development of rare-earth permanent-magnet electric machine, the anxiety of Dy, Tb resource is exacerbated, increases and is produced into
This, affects the long term growth of rare-earth permanent-magnet electric machine, is unfavorable for the comprehensive development and utilization of rare earth resources.
The surface treatment of rare earth permanent-magnetic material at present mostly uses the coats of metal such as zinc-plated, nickel plating (ambrose alloy nickel), although protection
Effect is preferable, but in motor operation, and under the action of rotating excitation field, coating generates vortex, makes the temperature of magnet steel in magneto
Degree rises, and with the increase of motor speed, vortex is increased, and the temperature of magnet steel significantly increases, and reduces the anti-demagnetization capability of magnet steel.Cause
This, is badly in need of a kind of strong magnet steel of the low anti-demagnetization capability of production cost.
Utility model content
The utility model embodiment is designed to provide a kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant, to
Solve the problems, such as that existing magnet steel high production cost and anti-demagnetization capability are low.
To achieve the above object, the utility model embodiment provides a kind of anti-demagnetization magnetic of rare-earth permanent-magnet electric machine high temperature resistant
Steel, the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant include at least one block of high-coercive force magnet steel and at least one piece of low coercive
Power magnet steel, the high-coercive force magnet steel are set to the demagnetization region in permanent magnet machine rotor, and the low-coercivity magnet steel is set to
Increasing magnetic area in permanent magnet machine rotor；Or the high-coercive force magnet steel is set to the strong demagnetization region in permanent magnet machine rotor,
The low-coercivity magnet steel is set to the weak demagnetization region in permanent magnet machine rotor；Adjacent two blocks of magnet steel are bonded structure by adhesive
At combination magnetic steel of magnetoelectric machine.
Preferably, the surface of the combination magnetic steel of magnetoelectric machine is coated with insulating coating.
Preferably, the section that the combination magnetic steel of magnetoelectric machine is parallel to the direction of magnetization is rectangle, shoe, trapezoidal or fan
Shape.
Preferably, the adhesive is high-temperature resistance adhesive.
Preferably, the adhesive with a thickness of 0.03-0.4mm.
Preferably, the insulating coating with a thickness of 0.03-0.4mm.
Correspondingly, the utility model embodiment also provides a kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant, institute
Stating the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant includes the magnet steel that at least two pieces of high temperature resistances are different, and high temperature resistance is high
High temperature resistant magnet steel be set to the demagnetization region in permanent magnet machine rotor, the low common magnet steel of high temperature resistance is set to Permanent Magnet and Electric
Increasing magnetic area in machine rotor；Or high temperature resistant magnet steel is set to the strong demagnetization region in permanent magnet machine rotor, common magnet steel setting
Weak demagnetization region in permanent magnet machine rotor；Adjacent two blocks of magnet steel constitute combination magneto magnetic by adhesive bonding
Steel.
Preferably, it is described combination magnetic steel of magnetoelectric machine surface be coated with insulating coating, the insulating coating with a thickness of
0.03-0.4mm。
Preferably, the section that the combination magnetic steel of magnetoelectric machine is parallel to the direction of magnetization is rectangle, shoe, trapezoidal or fan
Shape.
Preferably, the adhesive be high-temperature resistance adhesive, the adhesive with a thickness of 0.03-0.4mm.
The utility model embodiment has the advantages that the rare-earth permanent-magnet electric machine of the utility model embodiment is anti-with high temperature resistant
Demagnetize magnet steel, by the way that the bonding magnetic steel of unlike material or magnetic property is constituted combination magnetic steel of magnetoelectric machine, combines magneto magnetic
The surface of steel is handled using insulating coating, while not reducing magneto performance, significantly reduces the cost of magnetic steel material, together
When effectively improve the anti-demagnetization capability of magnet steel.
Detailed description of the invention
Fig. 1 is the cross-section structure signal of the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant in the utility model embodiment 1
Figure.
Fig. 2 is the cross-section structure signal of the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant in the utility model embodiment 2
Figure.
Fig. 3 is the cross-section structure signal of the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant in the utility model embodiment 3
Figure.
Drawing reference numeral explanation: 1, high-coercive force magnet steel；2, low-coercivity magnet steel；3, adhesive；4, insulating coating；5, resistance to height
Warm magnet steel；6, common magnet steel；100, magnetic steel of magnetoelectric machine is combined；200, arrow.
Specific embodiment
The following examples illustrate the utility model, but is not intended to limit the scope of the present invention.
Embodiment 1
As shown in Figure 1, the anti-demagnetization magnet steel of the rare-earth permanent-magnet electric machine high temperature resistant includes one block of high-coercive force magnet steel 1 and one piece
Low-coercivity magnet steel 2, but it's not limited to that for the quantity of magnet steel.High-coercive force magnet steel 1 is set in permanent magnet machine rotor
It demagnetizes region, high-coercive force magnet steel 1 is N35SH magnet steel in the present embodiment, inside grasps coercivity (Hcj) >=23kOe.Low-coercivity
Magnet steel 2 is set to the increasing magnetic area in permanent magnet machine rotor, and low-coercivity magnet steel 2 is N35SH magnet steel in the present embodiment, inside grasps
Coercivity (Hcj) >=20kOe, one end of high-coercive force magnet steel 1 and one end of low-coercivity magnet steel 2 pass through the Nian Jie structure of adhesive 3
At combination magnetic steel of magnetoelectric machine 100.It can ensure that between high-coercive force magnet steel 1 and low-coercivity magnet steel 2 absolutely using adhesive 3
Edge reduces the eddy-current loss in magnet steel, reduces magnet steel fever, improves the anti-demagnetization capability of magnet steel.The preferred high temperature resistant of adhesive 3
Adhesive, adhesive 3 with a thickness of 0.03-0.4mm, preference 0.25mm.In the present embodiment, magnetic steel of magnetoelectric machine is combined
100 be in cuboid, and having a size of 46*40*4.5mm, wherein 200 direction of arrow is the direction of magnetization.Further, it combines forever
The surface of magneto magnet steel 100 be coated with one layer of insulating coating 4, insulating coating 4 with a thickness of 0.03-0.4mm, preference is
0.2mm.Insulating coating 4 can also eliminate coating vortex, show while meeting the requirement of shelter of combination magnetic steel of magnetoelectric machine 100
The fever for reducing combination magnetic steel of magnetoelectric machine 100 is write, to further increase the anti-demagnetization capability of magnet steel.
In actual use, a 75kW rare earth permanent-magnet synchronization motor, design maximum operating temperature is 130 DEG C, and rotor is
8 pole radial structure of magnetic steel built-in type, one-directional rotation, magnet steel design the trade mark having a size of 46*40*4.5mm, plating nickel on surface, magnet steel
N35SH inside grasps coercivity (Hcj) >=21kOe.The motor is protected after working under 38~45 DEG C of environment 6.5 hours and is shut down, warp
Magnet steel loss of excitation is confirmed after tearing machine open.And it is assembled into again using the rare-earth permanent-magnet electric machine in the present embodiment with the anti-demagnetization magnet steel of high temperature resistant
Homotype motor, the motor newly assembled can be worked normally continuously in the present context.
Embodiment 2
As shown in Fig. 2, the anti-demagnetization magnet steel of the rare-earth permanent-magnet electric machine high temperature resistant includes two blocks of high-coercive force magnet steel 1 and one piece
Low-coercivity magnet steel 2, but it's not limited to that for the quantity of magnet steel.Two blocks of high-coercive force magnet steel 1 are respectively arranged at magneto
Two demagnetization regions in rotor, high-coercive force magnet steel 1 is N38SH magnet steel in the present embodiment, inside grasp coercivity (Hcj) >=
21kOe.Low-coercivity magnet steel 2 is set to the increasing magnetic area in permanent magnet machine rotor, and low-coercivity magnet steel 2 is in the present embodiment
N38H magnet steel inside grasps coercivity (Hcj) >=19kOe, one end of one of high-coercive force magnet steel 1 and low-coercivity magnet steel 2
One end be bonded by adhesive 3, the other end of low-coercivity magnet steel 2 and one end of other one block of high-coercive force magnet steel 1 pass through
Adhesive 3 is bonded, and three constitutes combination magnetic steel of magnetoelectric machine 100.The thickness preference of adhesive 3 is in the present embodiment
0.20mm.In the present embodiment, combination magnetic steel of magnetoelectric machine 100 is in cuboid, having a size of 78*40*10mm, wherein arrow 200
Direction is the direction of magnetization.Likewise, the surface for combining magnetic steel of magnetoelectric machine 100 in the present embodiment is also coated with insulating coating
4, insulating coating 4 with a thickness of 0.1mm.
Embodiment 3
As shown in figure 3, the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant includes two pieces of high temperature resistances in the present embodiment
Different magnet steel, but it's not limited to that for the quantity of magnet steel.The high high temperature resistant magnet steel 5 of high temperature resistance is set to magneto
Demagnetization region in rotor, the low common magnet steel 6 of high temperature resistance is set to the increasing magnetic area in permanent magnet machine rotor, in this reality
It applies in example, high temperature resistant magnet steel 5 is SmCo magnet steel, and common magnet steel 6 is Nd-Fe-B magnet steel.One end of high temperature resistant magnet steel 5 and common magnetic
One end of steel 6 constitutes combination magnetic steel of magnetoelectric machine 100 by the bonding of adhesive 3.3 thickness of adhesive is preferred in the present embodiment
Item is 0.12mm, likewise, the surface of combination magnetic steel of magnetoelectric machine 100 is also coated with insulating coating 4, the thickness of insulating coating 4
For 0.15mm.Combining magnetic steel of magnetoelectric machine 100 in the present embodiment and being parallel to the section of the direction of magnetization is shoe, can also be it certainly
His shape.
Although being above described in detail with generality explanation and specific embodiment to the utility model,
On the basis of the utility model, it can be modified or is improved, this is apparent to those skilled in the art
's.Therefore, these modifications or improvements on the basis of without departing from the spirit of the present invention, belong to the utility model and want
Seek the range of protection.
Claims (10)
1. a kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant, which is characterized in that the rare-earth permanent-magnet electric machine high temperature resistant
Anti- demagnetization magnet steel includes at least one block of high-coercive force magnet steel and at least one block of low-coercivity magnet steel；The high-coercive force magnet steel setting
Demagnetization region in permanent magnet machine rotor, the low-coercivity magnet steel are set to the increasing magnetic area in permanent magnet machine rotor；Or
The high-coercive force magnet steel is set to the strong demagnetization region in permanent magnet machine rotor, and the low-coercivity magnet steel is set to Permanent Magnet and Electric
Weak demagnetization region in machine rotor；Adjacent two blocks of magnet steel constitute combination magnetic steel of magnetoelectric machine by adhesive bonding.
2. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 1, which is characterized in that the combination is forever
The surface of magneto magnet steel is coated with insulating coating.
3. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 2, which is characterized in that the combination is forever
Magneto magnet steel be parallel to the section of the direction of magnetization be rectangle, it is shoe, trapezoidal or fan-shaped.
4. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 3, which is characterized in that the adhesive
For high-temperature resistance adhesive.
5. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 1 or 4, which is characterized in that the glue
Stick with a thickness of 0.03-0.4mm.
6. according to the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant described in claim 2,3 or 4, which is characterized in that described
Insulating coating with a thickness of 0.03-0.4mm.
7. a kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant, which is characterized in that the rare-earth permanent-magnet electric machine high temperature resistant
Anti- demagnetization magnet steel includes the magnet steel that at least two pieces of high temperature resistances are different, and the high high temperature resistant magnet steel of high temperature resistance is set to permanent magnetism
Demagnetization region in rotor, the low common magnet steel of high temperature resistance are set to the increasing magnetic area in permanent magnet machine rotor；Or
High temperature resistant magnet steel is set to the strong demagnetization region in permanent magnet machine rotor, and what common magnet steel was set in permanent magnet machine rotor weak moves back
Magnetic area；Adjacent two blocks of magnet steel constitute combination magnetic steel of magnetoelectric machine by adhesive bonding.
8. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 7, which is characterized in that the combination is forever
The surface of magneto magnet steel be coated with insulating coating, the insulating coating with a thickness of 0.03-0.4mm.
9. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 8, which is characterized in that the combination is forever
Magneto magnet steel be parallel to the section of the direction of magnetization be rectangle, it is shoe, trapezoidal or fan-shaped.
10. the anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant according to claim 8 or claim 9, which is characterized in that the glue
Stick is high-temperature resistance adhesive, the adhesive with a thickness of 0.03-0.4mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821416599.7U CN208596977U (en) | 2018-08-30 | 2018-08-30 | A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821416599.7U CN208596977U (en) | 2018-08-30 | 2018-08-30 | A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880040A (en) * | 2018-08-30 | 2018-11-23 | 包头瑞祥稀土科技有限公司 | A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant |
| CN110649732A (en) * | 2019-10-28 | 2020-01-03 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
-
2018
- 2018-08-30 CN CN201821416599.7U patent/CN208596977U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880040A (en) * | 2018-08-30 | 2018-11-23 | 包头瑞祥稀土科技有限公司 | A kind of anti-demagnetization magnet steel of rare-earth permanent-magnet electric machine high temperature resistant |
| CN110649732A (en) * | 2019-10-28 | 2020-01-03 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
| CN110649732B (en) * | 2019-10-28 | 2024-02-23 | 山东大学 | Mixed excitation rotor and mixed excitation surface-mounted permanent magnet motor |
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