CN209767265U - Composite magnetic slot wedge - Google Patents
Composite magnetic slot wedge Download PDFInfo
- Publication number
- CN209767265U CN209767265U CN201920487640.8U CN201920487640U CN209767265U CN 209767265 U CN209767265 U CN 209767265U CN 201920487640 U CN201920487640 U CN 201920487640U CN 209767265 U CN209767265 U CN 209767265U
- Authority
- CN
- China
- Prior art keywords
- slot wedge
- ferrite
- silicon steel
- magnetic slot
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 28
- 229910000976 Electrical steel Inorganic materials 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 7
- 230000005389 magnetism Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
the utility model discloses a compound magnetism slot wedge, compound magnetism slot wedge comprises resin board, ferrite and silicon steel, and ferrite and silicon steel bonding form the magnetizer, and the resin board bonds with the magnetizer up end. Compared with the prior art, because the magnetic slot wedge is made of the resin layer, the ferrite and the silicon steel composite structure, the problem that eddy current loss can be generated by adopting a single magnetic slot wedge is solved, and meanwhile, the composite magnetic slot wedge increases the primary slot leakage reactance, reduces the air gap coefficient, reduces the permanent magnet loss, improves the motor efficiency, reduces the higher harmonic peak value and improves the motor vibration condition.
Description
Technical Field
The utility model relates to a magnetic slot wedge for electric motor rotor, concretely relates to compound magnetic slot wedge.
Background
When the motor runs, the air gap magnetic conductance changes due to the iron core slotting, so that a cogging torque is generated between the cogging and the permanent magnet, the cogging torque can cause the motor to generate vibration and noise, the performance of the motor is influenced, and the low-speed performance and the high-precision positioning of the motor in a speed control system are influenced. When the motor runs at high speed, eddy current is generated in the permanent magnet, so that the temperature in the permanent magnet is increased, and the permanent magnet is easy to generate irreversible demagnetization.
In order to reduce the surface loss formed on the surfaces of the stator and the rotor and the pulse vibration loss generated by the tooth parts and reduce the vibration and the noise of the motor, the magnetic slot wedge is arranged at the end part of the primary slot, so that the magnetic flux of the motor passing through the slot opening can reduce the change amplitude of the magnetic flux due to the action of the magnetic slot wedge when the motor moves, the additional loss of the motor is reduced, the air gap coefficient is reduced, the leakage reactance of the motor is increased, and the temperature rise of the motor is reduced. In the prior art, a non-magnetic slot wedge is adopted to fix a winding coil, but the non-magnetic slot wedge cannot weaken the adverse effect of harmonic waves on a motor. Later, magnetic slot wedges were used to reduce the harmonic effect, but the magnetic slot wedges would generate eddy currents in the alternating magnetic field, causing heat energy loss, and therefore the magnetic slot wedges themselves need to have higher resistivity to reduce the eddy currents, so the magnetic slot wedges are made by pressing magnetic powder, but the strength is weaker. The strength of the magnetic steel is strong, but the magnetic steel is difficult to process and expensive, so that the cost is increased.
Although the prior art has the composite magnetic slot wedge, the magnetic conductivity is reduced to a certain extent and the harmonic attenuation degree is also reduced by compounding the magnetic material and the non-magnetic material. At present, a magnetic slot wedge compounded by two magnetic conductive materials is not available, the magnetic conductivity is not reduced, and the eddy current loss of the slot wedge can be reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides a compound magnetism slot wedge, compound magnetism slot wedge comprises resin board, ferrite and silicon steel are compound to form the magnetizer, the compound resin board in magnetizer top.
preferably, the ferrite penetrates through the centers of the upper end and the lower end of the silicon steel, the ferrite is flush with the upper end face and the lower end face of the silicon steel, and the lower end face of the resin plate is compounded with the ferrite and the upper end face of the silicon steel.
Preferably, the lower end face of the ferrite is compounded with the upper end face of the silicon steel, and the upper end face of the ferrite is compounded with the lower end face of the resin plate.
Preferably, the composites are all adhesive.
The resin plate layer plays a good role in protecting mechanical strength and is not afraid of knocking when the slot wedge is inserted; the ferrite increases the primary slot leakage reactance, reduces the air gap coefficient, can effectively reduce the higher harmonic peak value, but can generate the eddy current effect; the silicon steel has small eddy effect and weaker magnetic conductivity, and the combination of the three components can save permanent magnet, reduce cost, enhance mechanical strength of the slot wedge, reduce permanent magnet eddy loss and vibration noise of the motor, improve motor efficiency, effectively short out higher harmonics, prevent the higher harmonics from being coupled into the stator through an air gap, and simultaneously play a role in fixing a primary winding.
The utility model has the advantages that: because the magnetic slot wedge is made of the resin layer, the ferrite and the silicon steel composite structure and is compounded transversely or vertically, the problem that eddy current loss can be generated by adopting a single magnetic slot wedge is solved, and meanwhile, the composite magnetic slot wedge increases the leakage reactance of a primary slot, reduces the air gap coefficient, reduces the permanent magnet loss, improves the motor efficiency, reduces the higher harmonic peak value and improves the motor vibration condition. The resin plate, the ferrite and the silicon steel are bonded by glue and encapsulated by resin at the same time, so that the three parts are not separated, the nonuniformity of air gap flux density is improved, the no-load additional loss of the motor is reduced, the permanent magnet loss is reduced, and the fluctuation and the noise are reduced.
drawings
Fig. 1 is a schematic structural view of a composite magnetic slot wedge in embodiment 1 of the present invention;
Fig. 2 is a schematic structural view of a composite magnetic slot wedge in embodiment 2 of the present invention;
FIG. 3 is a comparison graph of the instantaneous thrust of three magnetic wedges moving at a synchronous speed of 4.5m/s at a rated current;
Fig. 4 is a graph comparing the permanent magnetic losses of three magnetic slot wedges.
In the figure: 1 resin plate, 2 ferrite, 3 silicon steel.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, the composite magnetic slot wedge is composed of a resin plate 1, a ferrite 2 and a silicon steel 3, the ferrite 2 and the silicon steel 3 are bonded to form a magnetizer, the ferrite 2 penetrates through the upper end and the lower end of the silicon steel 3, the ferrite 2 is flush with the upper end and the lower end of the silicon steel 3, and the lower end of the resin plate 1 is bonded with the upper end of the ferrite 2 and the upper end of the silicon steel 3.
Example 2
As shown in fig. 2, the composite magnetic slot wedge is composed of a resin plate 1, a ferrite 2 and a silicon steel 3, the ferrite 2 and the silicon steel 3 are bonded to form a magnetizer, the lower end surface of the ferrite 2 is bonded to the upper end surface of the silicon steel 3, and the upper end surface of the ferrite 2 is bonded to the lower end surface of the resin plate 3.
As shown in fig. 3-4, the composite magnetic slot wedge of example 1 has 81% lower thrust fluctuation and 57% lower permanent magnet loss compared to the slot wedge without the composite magnetic wedge. Compared with the slot wedge without the composite magnetic slot wedge, the composite magnetic slot wedge in the embodiment 2 has the advantages that the thrust fluctuation is reduced by 86%, and the permanent magnet loss is reduced by 62%.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (4)
1. The composite magnetic slot wedge is characterized by comprising a resin plate, ferrite and silicon steel, wherein the ferrite and the silicon steel are compounded to form a magnetizer, and the top of the magnetizer is compounded with the resin plate.
2. The composite magnetic slot wedge of claim 1, wherein the ferrite is formed through the upper and lower ends of the silicon steel, and is flush with the upper and lower end surfaces of the silicon steel, and the lower end surface of the resin plate is composited with the upper end surfaces of the ferrite and the silicon steel.
3. The composite magnetic slot wedge of claim 1, wherein the lower end surface of the ferrite is composited with the upper end surface of the silicon steel, and the upper end surface of the ferrite is composited with the lower end surface of the resin plate.
4. A composite magnetic slot wedge according to claim 2 or 3, wherein the composite is adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920487640.8U CN209767265U (en) | 2019-04-11 | 2019-04-11 | Composite magnetic slot wedge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920487640.8U CN209767265U (en) | 2019-04-11 | 2019-04-11 | Composite magnetic slot wedge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209767265U true CN209767265U (en) | 2019-12-10 |
Family
ID=68758833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920487640.8U Expired - Fee Related CN209767265U (en) | 2019-04-11 | 2019-04-11 | Composite magnetic slot wedge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209767265U (en) |
-
2019
- 2019-04-11 CN CN201920487640.8U patent/CN209767265U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191210 |
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| CF01 | Termination of patent right due to non-payment of annual fee |