CN110571964A - Motor, stator and fold and rivet formula magnetism slot wedge - Google Patents
Motor, stator and fold and rivet formula magnetism slot wedge Download PDFInfo
- Publication number
- CN110571964A CN110571964A CN201910912899.7A CN201910912899A CN110571964A CN 110571964 A CN110571964 A CN 110571964A CN 201910912899 A CN201910912899 A CN 201910912899A CN 110571964 A CN110571964 A CN 110571964A
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- China
- Prior art keywords
- magnetic
- slot wedge
- stator
- conductive sheet
- laminated
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/48—Fastening of windings on the stator or rotor structure in slots
- H02K3/487—Slot-closing devices
- H02K3/493—Slot-closing devices magnetic
Abstract
The invention discloses a laminated-riveting type magnetic slot wedge which comprises a plurality of magnetic conducting sheets which are stacked into a whole along the axial direction and are used for being installed in an iron core notch of a stator iron core so as to compress a stator winding in the iron core notch, laminated-riveting points used for enabling adjacent two magnetic conducting sheets to be in concave-convex riveting are arranged on the surface of each magnetic conducting sheet, and holes used for reducing tangential magnetic flux leakage are arranged in the middle area of the surface of each magnetic conducting sheet. According to the invention, the surface of each magnetic conductive sheet is provided with a plurality of riveting points, and two adjacent magnetic conductive sheets can be mutually corresponding to form concave-convex overlapping through the respective riveting points and are riveted and fixed. Meanwhile, the middle area of the surface of each magnetic conductive sheet is also provided with a notch which is mainly used for cutting off the tangential magnetic path, thereby effectively reducing the tangential magnetic leakage and improving the load capacity of the motor. The invention also discloses a stator and a motor, which have the beneficial effects as described above.
Description
Technical Field
The invention relates to the technical field of motors, in particular to a laminated-riveting type magnetic slot wedge. The invention also relates to a stator and an electric machine.
Background
For a high-power motor, in order to reliably fix a coil and facilitate wire embedding, an iron core is usually grooved, and the coil is fixed in the iron core groove. Because the notch of coil embedding is left to the iron core notch for the distribution of air gap magnetic field near iron core notch and addendum takes place the distortion, thereby produces the efficiency that stray loss reduces the motor, increases the temperature rise of motor, and aggravate the electromagnetic noise and the vibration of motor, arouse insulating and bearing life-span to descend.
The efficient motor is a concrete embodiment of environmental protection and energy conservation in practical application in production and popularization. Conventional methods of improving motor efficiency include: for example, the iron length is increased, more and better silicon steel sheets are used to reduce the iron loss, and a proper groove is adopted to match with a low-harmonic sine winding. Experimental data demonstrate that the use of a magnetic wedge instead of a conventional insulating wedge has proven to be an economically efficient method.
The magnetic slot wedge is made up by adding magnetic conductive material into the material for making ordinary slot wedge, hot-pressing, solidifying and forming, and is mainly formed from thermosetting matrix resin, reinforced glass fibre and magnetic powder. The matrix resin and the reinforced fiber are used for improving the mechanical property and the heat resistance of the slot wedge, and the magnetic substance improves the conductive and magnetic properties of the slot wedge. The magnetic conductivity coefficient of the magnetic slot wedge is large, so that the effective sectional area of the stator tooth part is increased, the magnetic resistance is reduced, the air gap coefficient of the motor is reduced, and equivalently, the effective air gap of the motor is shortened, so that the surface loss and the pulse vibration loss of the motor are reduced, the motor efficiency is improved, the winding temperature rise is reduced, the vibration and noise level can be greatly reduced, and the service life of the motor is prolonged.
The magnetic slot wedges can effectively attenuate the adverse effects of cogging of the motor by reducing the air gap field ripple near the teeth and slots, but they also have non-negligible disadvantages. The magnetic slot wedge has magnetic leakage along the tangential direction of the motor, so that the electrical performance of the motor is slightly reduced, mainly represented by reduction of maximum torque and starting torque and reduction of load capacity.
Therefore, how to reduce the magnetic flux leakage phenomenon of the motor along the tangential direction and improve the load capacity of the motor on the basis of ensuring and improving the air gap magnetic flux distribution of the motor is a technical problem faced by those skilled in the art.
Disclosure of Invention
The invention aims to provide a laminated-rivet type magnetic slot wedge which can reduce the magnetic flux leakage phenomenon of a motor along the tangential direction and improve the load capacity of the motor on the basis of ensuring and improving the air gap magnetic flux distribution of the motor. Another object of the invention is to provide a stator and an electric machine.
In order to solve the technical problem, the invention provides a laminated-riveting type magnetic slot wedge which comprises a plurality of magnetic conductive sheets which are axially stacked into a whole and are used for being installed in an iron core notch of a stator iron core to compress a stator winding in the iron core notch, laminated-riveting points used for enabling concave-convex riveting to be formed between every two adjacent magnetic conductive sheets are arranged on the surface of each magnetic conductive sheet, and holes used for reducing tangential magnetic flux leakage are arranged in the middle area of the surface of each magnetic conductive sheet.
Preferably, the holes are circular, oval or rectangular in shape.
Preferably, the magnetic core comprises a core slot, a magnetic conductive sheet is arranged on the core slot, and the magnetic conductive sheet is arranged on the core slot.
Preferably, the coating shell is a composite shell of glass fiber and resin.
Preferably, each riveting point is a groove formed by stamping, and the cross section of the groove is in a V shape or a U shape.
Preferably, each magnetic conductive plate is in the shape of an isosceles trapezoid or a double-vertex-angle hexagon.
Preferably, the surfaces of the magnetic conductive plates are coated with insulating materials for reducing eddy current loss.
Preferably, each magnetic conductive sheet is a silicon steel sheet.
The invention further provides a stator which comprises a stator core, a stator winding and the laminated riveting type magnetic slot wedge arranged on the stator core, wherein the laminated riveting type magnetic slot wedge is specifically any one of the laminated riveting type magnetic slot wedges.
The invention also provides a motor, which comprises a rotor and a stator, wherein the stator is the stator in the previous item.
The invention provides a laminated rivet type magnetic slot wedge which mainly comprises a plurality of magnetic conducting sheets, wherein the magnetic conducting sheets are stacked and installed into a whole along the normal direction (the direction vertical to the surface of the magnetic conducting sheets), and are installed in an iron core notch of a stator iron core along the axial direction (the axial direction of a stator or a rotor) to tightly press a stator winding installed in the iron core notch. Importantly, a plurality of riveting points are arranged on the surface of each magnetic conductive sheet, and two adjacent magnetic conductive sheets can be mutually and correspondingly overlapped in a concave-convex mode through the respective riveting points and are fixedly riveted. Meanwhile, the middle area of the surface of each magnetic conductive sheet is also provided with a notch which is mainly used for cutting off the tangential magnetic path, thereby effectively reducing the tangential magnetic leakage and improving the load capacity of the motor. Compared with the prior art, the laminated-rivet type magnetic slot wedge provided by the invention can reduce the tangential magnetic flux leakage of the motor and improve the load capacity on the basis of shortening the effective air gap length of the motor and improving the air gap magnetic flux distribution of the motor; meanwhile, the magnetic slot wedge is simple in structure, easy to produce and process, high in structural strength, durable and reliable, suitable for large-scale production in factories, and lower in processing cost compared with an integral strip-shaped slot wedge.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of an installation structure of a magnetic slot wedge on a stator core according to an embodiment of the present invention.
Fig. 3 is a cross-sectional structural view of the magnetic conductive plate shown in fig. 1.
Fig. 4 is another structural schematic diagram of the magnetic conductive sheet shown in fig. 1.
Wherein, in fig. 1-4:
A stator core-1, a stator winding-2, a magnetic conductive sheet-3 and a coating shell-4;
An iron core notch-101, a folding riveting point-301 and a hole-302.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
In one embodiment of the present invention, the magnetic slot wedge mainly includes a plurality of magnetic conductive sheets 3, each magnetic conductive sheet 3 is stacked and installed in a normal direction (a direction perpendicular to a surface thereof) and installed in a core slot 101 of the stator core 1 in an axial direction (an axial direction of the stator or the rotor) to compress the stator winding 2 installed in the core slot 101.
importantly, a plurality of riveting points 301 are arranged on the surface of each magnetic conductive plate 3, and two adjacent magnetic conductive plates 3 can be mutually and correspondingly overlapped in a concave-convex manner through the respective riveting points 301 and are riveted and fixed. Meanwhile, the middle area of the surface of each magnetic conductive plate 3 is also provided with a notch 302, and the notch 302 is mainly used for cutting off a tangential magnetic path, so that the tangential magnetic flux leakage is effectively reduced, and the load capacity of the motor is improved.
Compared with the prior art, the laminated-rivet type magnetic slot wedge provided by the embodiment can reduce the tangential magnetic flux leakage of the motor and improve the load capacity on the basis of shortening the effective air gap length of the motor and improving the air gap magnetic flux distribution of the motor; meanwhile, the magnetic slot wedge is simple in structure, easy to produce and process, high in structural strength, durable and reliable, suitable for large-scale production in factories, and lower in processing cost compared with an integral strip-shaped slot wedge.
In a preferred embodiment with respect to the magnetically permeable sheets 3, the magnetically permeable sheets 3 may specifically be silicon steel sheets. Of course, the magnetic conductive sheet 3 may also be other metal sheets having the same magnetic property, such as steel sheets.
As shown in fig. 2, fig. 2 is a schematic view of an installation structure of a magnetic slot wedge on a stator core 1 according to an embodiment of the present invention.
In order to facilitate stable installation and matching with the iron core notch 101, in this embodiment, each magnetic conductive plate 3 may be in the shape of an isosceles trapezoid, with its small end being located above and its large end being located below, and after being installed in the iron core notch 101, the large end of each magnetic conductive plate 3 is pressed against the top surface of the stator winding 2 and presses it. Of course, the specific shape of the magnetic conductive sheet 3 is not fixed, for example, it may be a double vertex angle hexagon, as shown in fig. 4, and fig. 4 is another schematic structural diagram of the magnetic conductive sheet 3 shown in fig. 1. Meanwhile, the shape of the iron core notch 101 on the stator iron core 1 is the same as that of each magnetic conductive sheet 3, so that the installation is convenient.
Further, in order to reduce the eddy current loss, the surface of each magnetic conductive sheet 3 is coated with an insulating material, such as a plastic layer. So set up, through the insulating material on 3 surfaces of each slice magnetic conductive plate, can effectively reduce the vortex that forms in the magnetic slot wedge at the motor operation in-process, reduce loss and temperature rise.
Fig. 3 is a cross-sectional structural view of the magnetic conductive plate 3 shown in fig. 1.
In order to improve the stability of the stacked riveting connection of each magnetic conductive plate 3, in this embodiment, the surface preset position of each magnetic conductive plate 3 is punched by using a progressive die to form the stacked riveting point 301. Specifically, each overlapped riveting point 301 may have a V-shaped or U-shaped cross section, and may have other arc shapes. So set up, two slice arbitrary adjacent magnetic conduction pieces 3 in each magnetic conduction piece 3 in the magnetism slot wedge will fold through two of corresponding position department and rivet point 301 and form unsmooth cooperation, and two adjacent magnetic conduction pieces 3 are riveted into an organic whole.
In a preferred embodiment of the notch hole 302, the core of the notch hole 302 is a through hole to cut off the tangential magnetic path, but the specific shape of the notch hole 302 is not fixed, for example, the notch hole 302 may be a circular hole, an elliptical hole, a rectangular hole, or the like. Moreover, the holes 302 are generally opened in the middle of the magnetic conductive plate 3, the riveting points 301 can be generally disposed on the two sides of the magnetic conductive plate 3, and the holes 302 are located between the riveting points 301 on the two sides. Of course, the arrangement position, the arrangement number, the distribution form and the like of the rivet folding points 301 on the magnetic conductive sheet 3 are not fixed, and can be specifically adjusted according to the needs.
In addition, considering that the magnetic conductive sheet 3 is overlapped and riveted and installed, the structure such as deckle edge, burr may have to the roughness of surface is high, for the convenience forms the assembly smoothly with the iron core notch 101, reduces surface wear, this embodiment has still wrapped up one deck cladding shell 4 on the surface of magnetism slot wedge. Specifically, the coating shell 4 can be made of a composite material of glass fiber and resin, the surface of the coating shell 4 is smooth, the flatness is high, the wear resistance is good, on one hand, the protection can be formed on each magnetic conductive sheet 3, the structural strength and the integrity are improved, and on the other hand, the coating shell is favorable for being assembled with the iron core notch 101 on the stator iron core 1. Of course, if the amount of the punched burrs of each magnetic conductive sheet 3 is small and the stacking and riveting regularity is high, the covering shell 4 may be removed.
The present embodiment further provides a stator, which mainly includes a stator core 1, a stator winding 2, and a laminated-riveted magnetic slot wedge disposed on the stator core 1, wherein the main content of the laminated-riveted magnetic slot wedge is the same as the related content, and is not described herein again.
Moreover, the present embodiment further provides a motor, which mainly includes a rotor and a stator, wherein the stator is the same as the stator in the foregoing, and is not described herein again. The magnetic slot wedge and the stator of the present embodiment may be applied to both a generator and a motor.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a fold and rivet formula magnetism slot wedge, its characterized in that includes that a plurality of pieces stack up integrative, be arranged in installing to iron core notch (101) of stator core (1) in order to compress tightly magnetic conductive sheet (3) of stator winding (2) wherein, each piece magnetic conductive sheet (3) all offer on the surface be used for making adjacent two form unsmooth riveted fold riveting point (301) between magnetic conductive sheet (3), and each piece the surperficial middle part of magnetic conductive sheet (3) is all offered and is used for reducing lacking hole (302) of tangential magnetic leakage.
2. A clinch magnetic slot wedge as claimed in claim 1, wherein the aperture (302) is particularly circular, oval or rectangular.
3. The laminated rivet type magnetic slot wedge of claim 1, further comprising a coating shell (4) which is coated on the outer surface of each magnetic conductive sheet (3) and used for improving surface finish to be matched with the iron core notch (101) for installation.
4. A clinch-on magnetic slot wedge according to claim 3, characterised in that the covering shell (4) is in particular a composite shell of glass fibres and resin.
5. A clinch-on magnetic slot wedge as claimed in claim 1, wherein each clinch point (301) is embodied as a groove formed by stamping, and the cross-section of the groove is embodied as V-shaped or U-shaped.
6. a clinch-on magnetic slot wedge according to claim 1, wherein each of the magnetic conducting plates (3) is in particular in the form of an isosceles trapezoid or a double-vertex hexagon.
7. A clinch magnetic slot wedge according to claim 6, wherein the surface of each of the magnetically permeable sheets (3) is coated with an insulating material for reducing eddy current losses.
8. A laminated-riveted magnetic slot wedge according to claim 7, characterized in that each magnetic conductive sheet (3) is a silicon steel sheet.
9. A stator comprising a stator core (1), a stator winding (2) and a laminated riveted magnetic slot wedge arranged on the stator core (1), characterized in that the laminated riveted magnetic slot wedge is specifically the laminated riveted magnetic slot wedge of any one of claims 1 to 8.
10. An electric machine comprising a rotor and a stator, characterized in that the stator is embodied as a stator according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912899.7A CN110571964A (en) | 2019-09-25 | 2019-09-25 | Motor, stator and fold and rivet formula magnetism slot wedge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910912899.7A CN110571964A (en) | 2019-09-25 | 2019-09-25 | Motor, stator and fold and rivet formula magnetism slot wedge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110571964A true CN110571964A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910912899.7A Pending CN110571964A (en) | 2019-09-25 | 2019-09-25 | Motor, stator and fold and rivet formula magnetism slot wedge |
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| Country | Link |
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| CN (1) | CN110571964A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448516A (en) * | 2020-11-02 | 2021-03-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, stator structure, motor, compressor and air conditioner with stator core and stator structure |
| CN112885594A (en) * | 2021-02-20 | 2021-06-01 | 浙江博菲电气股份有限公司 | Magnetic strip material prepared from magnetic conduction particles and preparation method |
| DE102020114796A1 (en) | 2020-06-04 | 2021-12-09 | Bayerische Motoren Werke Aktiengesellschaft | Linear-elastic slot closure element for reducing magnetic flux leakage in electrical machines |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857788A (en) * | 1987-06-17 | 1989-08-15 | Magnetek, Inc. | Magnetic top wedge |
| CN2392297Y (en) * | 1999-08-16 | 2000-08-16 | 张生铭 | Paramagnetic magnetic conducting slot wedge used for electric motor |
| CN204706967U (en) * | 2015-05-19 | 2015-10-14 | 浙江海宏电器有限公司 | A kind of stator structure being applied to micromachine |
| CN107210632A (en) * | 2015-02-25 | 2017-09-26 | 三菱电机株式会社 | Armature and electric rotating machine |
| CN107408864A (en) * | 2015-03-26 | 2017-11-28 | 西门子公司 | Self-adhering type slot sealing arrangement for motor |
| CN108173372A (en) * | 2017-12-21 | 2018-06-15 | 上海电力学院 | A kind of stacked magnetic slot-seal |
| CN208241422U (en) * | 2018-06-25 | 2018-12-14 | 翁娟菁 | A kind of motor rotor punching sheet closely consolidates riveted structure |
| CN208261775U (en) * | 2018-03-07 | 2018-12-21 | 江苏兴云动力科技有限公司 | A kind of motor stator riveting tool |
-
2019
- 2019-09-25 CN CN201910912899.7A patent/CN110571964A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4857788A (en) * | 1987-06-17 | 1989-08-15 | Magnetek, Inc. | Magnetic top wedge |
| CN2392297Y (en) * | 1999-08-16 | 2000-08-16 | 张生铭 | Paramagnetic magnetic conducting slot wedge used for electric motor |
| CN107210632A (en) * | 2015-02-25 | 2017-09-26 | 三菱电机株式会社 | Armature and electric rotating machine |
| CN107408864A (en) * | 2015-03-26 | 2017-11-28 | 西门子公司 | Self-adhering type slot sealing arrangement for motor |
| CN204706967U (en) * | 2015-05-19 | 2015-10-14 | 浙江海宏电器有限公司 | A kind of stator structure being applied to micromachine |
| CN108173372A (en) * | 2017-12-21 | 2018-06-15 | 上海电力学院 | A kind of stacked magnetic slot-seal |
| CN208261775U (en) * | 2018-03-07 | 2018-12-21 | 江苏兴云动力科技有限公司 | A kind of motor stator riveting tool |
| CN208241422U (en) * | 2018-06-25 | 2018-12-14 | 翁娟菁 | A kind of motor rotor punching sheet closely consolidates riveted structure |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020114796A1 (en) | 2020-06-04 | 2021-12-09 | Bayerische Motoren Werke Aktiengesellschaft | Linear-elastic slot closure element for reducing magnetic flux leakage in electrical machines |
| CN112448516A (en) * | 2020-11-02 | 2021-03-05 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator core, stator structure, motor, compressor and air conditioner with stator core and stator structure |
| CN112885594A (en) * | 2021-02-20 | 2021-06-01 | 浙江博菲电气股份有限公司 | Magnetic strip material prepared from magnetic conduction particles and preparation method |
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Application publication date: 20191213 |