CN111130242A - Permanent magnet synchronous motor rotor magnetic steel fixing structure - Google Patents
Permanent magnet synchronous motor rotor magnetic steel fixing structure Download PDFInfo
- Publication number
- CN111130242A CN111130242A CN202010156145.6A CN202010156145A CN111130242A CN 111130242 A CN111130242 A CN 111130242A CN 202010156145 A CN202010156145 A CN 202010156145A CN 111130242 A CN111130242 A CN 111130242A
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- Prior art keywords
- magnetic steel
- rotor
- permanent magnet
- elastic sheet
- steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 145
- 239000010959 steel Substances 0.000 title claims abstract description 145
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 28
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 239000003292 glue Substances 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 239000012634 fragment Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
A permanent magnet synchronous motor rotor magnetic steel fixing structure comprises a rotor core and magnetic steel, wherein a rotor magnetic steel groove is formed in the rotor core, and an elastic sheet is arranged in the rotor magnetic steel groove; the magnetic steel is inserted into a rotor magnetic steel groove on the rotor core, the elastic sheet is bent in a notch at the bottom of the magnetic steel, and the magnetic steel is fixed in the rotor magnetic steel groove on the rotor core through the resilience force of the elastic sheet. The invention realizes the reliable fixation of the permanent magnet steel in the rotor core through the matching of the elastic sheet and the groove, can reduce the use of materials and simplify the process, thereby reducing the production cost of parts and improving the production efficiency; meanwhile, the stability of the motor rotor at a high rotating speed is optimized, and the requirement of high rotating speed in the new energy automobile driving motor industry is met.
Description
Technical Field
The invention relates to the technical field of permanent magnet synchronous motors, in particular to a fixing structure of permanent magnet steel in a permanent magnet synchronous motor in a rotor core.
Background
In recent years, with the rapid development of power electronic technology, microelectronic technology, novel motor control theory and rare earth permanent magnet materials, the application of permanent magnet synchronous motors is more and more extensive. The permanent magnet synchronous motor has the advantages of small volume, low loss, high efficiency and the like. At present, a mainstream driving motor in the new energy automobile industry is also a permanent magnet synchronous motor.
In the permanent magnet synchronous motor, permanent magnet steel and a rotor iron core are important component parts in a rotor. In the prior art, a rotor core is formed by stacking multiple layers of silicon steel sheets with slot, hole and special-shaped positioning and weight removal features, and a magnetic steel slot for inserting permanent magnetic steel is formed in the rotor core. The permanent magnet steel is inserted into a magnet steel groove on the rotor core and is fixed by adopting composite material bonding processes such as glue, injection molding, encapsulation and the like, so that the permanent magnet steel cannot shake in the magnet steel groove.
The existing permanent magnet synchronous motor rotor magnetic steel fixing structure is complex, multiple processes are needed when the permanent magnet magnetic steel is fixed in a rotor core, auxiliary materials such as glue needed to be used are various, the production cost of parts is high, and the production efficiency is low. Meanwhile, when the motor rotor rotates at a high speed, glue and the like can melt, so that the permanent magnet steel and the rotor core are fixed to lose efficacy and generate faults, and therefore the existing rotor magnet steel fixing structure cannot meet the requirement of high rotating speed of the new energy automobile driving motor industry.
Disclosure of Invention
The invention aims to solve the technical problem of how to simplify the fixing and assembling process of the permanent magnet steel and the rotor iron core so as to reduce the material consumption, reduce the production cost of parts, improve the production efficiency and improve the stability of the rotor magnetic steel fixing structure.
In order to solve the technical problem, the technical scheme of the invention is to provide a rotor magnetic steel fixing structure of a permanent magnet synchronous motor, the rotor magnetic steel fixing structure of the permanent magnet synchronous motor comprises a rotor iron core and magnetic steel, a rotor magnetic steel groove is formed in the rotor iron core, the magnetic steel is inserted into the rotor magnetic steel groove, an elastic sheet is arranged in the rotor magnetic steel groove and is positioned between the rotor magnetic steel groove and the magnetic steel, the magnetic steel bends the elastic sheet, and the magnetic steel is fixed in the rotor magnetic steel groove by resilience force of the elastic sheet.
Furthermore, the side face of the magnetic steel is provided with an inward concave notch, and the elastic sheet is positioned in the notch.
Further, the width of the notch is larger than the length of the elastic sheet.
Further, the depth of the notch is smaller than the height of the elastic sheet.
Further, the extending direction of the rotor magnetic steel groove is parallel to the axial direction of the rotor iron core, the elastic sheet is arranged on the central line of one inner side face of the rotor magnetic steel groove, the central line is parallel to the extending direction of the rotor magnetic steel groove, and the extending direction of the notch is parallel to the axial direction of the rotor iron core and is arranged on the central line of one outer side face of the magnetic steel.
Furthermore, the rotor core is formed by stacking a plurality of first silicon steel sheets and a plurality of second silicon steel sheets at intervals; a first magnetic steel slot is formed in the first silicon steel sheet, and an elastic sheet is arranged at the bottom of the first magnetic steel slot; and a second magnetic steel slot is formed in the second silicon steel sheet, and the first magnetic steel slot corresponds to the second magnetic steel slot in position to form a rotor magnetic steel slot penetrating through the rotor core.
Furthermore, the shape of the first magnetic steel slot hole and the shape of the second magnetic steel slot hole are matched with the outer contour of the section of the magnetic steel, and the section of the magnetic steel is perpendicular to the length direction of the magnetic steel.
Furthermore, the elastic sheet extends from the bottom of the first magnetic steel slot hole to the center direction of the first magnetic steel slot hole.
Furthermore, the elastic sheet is rectangular, and the notch is a rectangular groove.
Compared with the prior art, the permanent magnet synchronous motor rotor magnetic steel fixing structure provided by the invention has the following beneficial effects:
1. through the matching design of the elastic sheet in the rotor magnetic steel groove and the notch on the magnetic steel, the resilience force of the elastic sheet after bending can provide enough force to fix the magnetic steel when the magnetic steel is pressed into the rotor magnetic steel groove, and the magnetic steel cannot be damaged. Therefore, through the ingenious structural design, the permanent magnet steel is reliably fixed in the rotor core, the use of materials can be reduced, and the process is simplified, so that the production cost of parts is reduced, and the production efficiency is improved;
2. when the motor rotor rotates at a high speed, the permanent magnet synchronous motor rotor magnetic steel fixing structure provided by the invention is still stable and reliable, has high safety, and meets the requirement of high rotation speed in the new energy automobile driving motor industry.
Drawings
Fig. 1 is an exploded schematic view of a permanent magnet synchronous motor rotor magnetic steel fixing structure according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating an assembly connection of a first silicon steel sheet and magnetic steel according to an embodiment of the present invention;
fig. 3 is a schematic view illustrating the assembly and connection of the second silicon steel sheet and the magnetic steel according to an embodiment of the present invention.
Detailed Description
Fig. 1 is an explosion schematic view of a permanent magnet synchronous motor rotor magnetic steel fixing structure according to an embodiment of the present invention, and the permanent magnet synchronous motor rotor magnetic steel fixing structure is composed of a first silicon steel sheet 1, a second silicon steel sheet 2, magnetic steel 3, and other components.
Referring to fig. 2, the first silicon steel sheet 1 is a silicon steel sheet with a special spring characteristic. A first magnetic steel slot 11 is formed in the first silicon steel sheet 1, and the first magnetic steel slot 11 is a groove body matched with the outer contour of the magnetic steel 3. The center of the bottom of the first magnetic steel slot 11 is provided with a spring 12, and the spring 12 extends along the bottom of the first magnetic steel slot 11 toward the center of the first magnetic steel slot 11.
Referring to fig. 3, the second silicon steel sheet 2 is a silicon steel sheet having general characteristics. The second silicon steel sheet 2 is provided with a second magnetic steel slot 21, and the second magnetic steel slot 21 has a general characteristic structure, namely a slot body matched with the outer contour of the magnetic steel 3. The bottom of the second magnetic steel slot 21 is a plane without a spring plate.
The center of the long side of the bottom of the magnetic steel 3 is provided with a rectangular notch 31 which is concave inwards. In this embodiment, the width of the notch 31 is slightly larger than the length of the spring 12, and the depth of the notch 31 is smaller than the height of the spring 12.
The first silicon steel sheets 1 and the second silicon steel sheets 2 are arranged at intervals and stacked to form the rotor core. The first magnetic steel slot hole 11 on the first silicon steel sheet 1 corresponds to the second magnetic steel slot hole 21 on the second silicon steel sheet 2 in position, so as to form a through rotor magnetic steel slot.
When assembling magnet steel 3, in the rotor magnetic steel groove of the rotor core who comprises first silicon steel sheet 1 and the setting of 2 intervals of second silicon steel sheet with magnet steel 3 impressed, the notch 31 at the long limit center in magnet steel 3 bottom just in time corresponds shell fragment 12 at first magnet steel slotted hole 11 bottom center on first silicon steel sheet 1 to with shell fragment 12 bending, rely on the fixed magnet steel 3 of resilience force of shell fragment 12, make magnet steel 3 can not rock in rotor magnetic steel groove.
Meanwhile, the notch 31 formed in the center of the long edge at the bottom of the magnetic steel 3 can ensure that the elastic sheet 12 has enough bending space when the magnetic steel 3 is pressed in, and cannot interfere with the transfer space of the magnetic steel 3.
The permanent magnet synchronous motor rotor magnetic steel fixing structure provided by the embodiment has the advantages that through the matching design of the elastic sheet 12 on the first silicon steel sheet 1 and the notch 31 on the magnetic steel 3, the resilience force after the elastic sheet 12 is bent can provide enough force to fix the magnetic steel 3 when the magnetic steel 3 is pressed in, and the magnetic steel 3 cannot be damaged. So, through ingenious structural design, realized the reliable fixed of permanent magnet steel in rotor core, can reduce materials such as glue and use, reduce the cost of raw and other materials, reduce the processing degree of difficulty simultaneously, reduce the processing cost, improve the machining efficiency of product.
In addition, when electric motor rotor high rotational speed, the permanent magnet synchronous motor rotor magnet steel fixed knot that this embodiment provided constructs still reliable and stable, and the security is high.
The permanent magnet synchronous motor rotor magnetic steel fixing structure provided by the embodiment changes the traditional fixing mode of adopting composite material bonding processes such as glue, injection molding and encapsulation into a mode of clamping silicon steel sheets with special elastic sheet characteristics in common characteristic silicon steel sheets, and utilizes the elastic sheet structural characteristics at the magnetic steel grooves of the silicon steel sheets with the special elastic sheet characteristics to bend and then clamp the magnetic steel for fixing; meanwhile, the center of the long edge of the magnetic steel is designed with a rectangular groove characteristic, so that a bent clamping space is provided for the elastic sheet of the silicon steel sheet with the special elastic sheet characteristic after the magnetic steel is inserted. Therefore, the use of materials can be reduced, and the process is simplified, so that the production cost of parts is reduced, and the production efficiency is improved. Meanwhile, the stability of the motor rotor at a high rotating speed is optimized, and the requirement of high rotating speed in the new energy automobile driving motor industry is met.
It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that the foregoing and other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a PMSM rotor magnet steel fixed knot constructs, includes rotor core and magnet steel, rotor core in be equipped with rotor magnetic steel groove, the magnet steel insert rotor magnetic steel inslot, its characterized in that: the rotor magnetic steel groove is internally provided with an elastic sheet which is positioned between the rotor magnetic steel groove and the magnetic steel, the magnetic steel bends the elastic sheet, and the magnetic steel is fixed in the rotor magnetic steel groove by the resilience force of the elastic sheet.
2. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 1, characterized in that: the side of the magnetic steel is provided with an inward concave notch, and the elastic sheet is positioned in the notch.
3. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 2, characterized in that: the width of the notch is larger than the length of the elastic sheet.
4. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 2 or 3, characterized in that: the depth of the notch is smaller than the height of the elastic sheet.
5. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 2, characterized in that: the extending direction of the rotor magnetic steel groove is parallel to the axial direction of the rotor iron core, the elastic sheet is arranged on the central line of one inner side face of the rotor magnetic steel groove, the central line is parallel to the extending direction of the rotor magnetic steel groove, and the extending direction of the notch is parallel to the axial direction of the rotor iron core and is arranged on the central line of one outer side face of the magnetic steel.
6. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 1, characterized in that: the rotor iron core is formed by stacking a plurality of first silicon steel sheets and a plurality of second silicon steel sheets at intervals;
a first magnetic steel slot is formed in the first silicon steel sheet, and an elastic sheet is arranged at the bottom of the first magnetic steel slot;
a second magnetic steel slotted hole is arranged on the second silicon steel sheet,
the first magnetic steel slot hole corresponds to the second magnetic steel slot hole in position to form a rotor magnetic steel slot penetrating through the rotor core.
7. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 6, wherein: the shape of the first magnetic steel slot hole and the shape of the second magnetic steel slot hole are matched with the outer contour of the section of the magnetic steel, and the section of the magnetic steel is perpendicular to the length direction of the magnetic steel.
8. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 6, wherein: the elastic sheet extends from the bottom of the first magnetic steel slotted hole to the center direction of the first magnetic steel slotted hole.
9. The permanent magnet synchronous motor rotor magnetic steel fixing structure of claim 2, characterized in that: the elastic sheet is rectangular, and the notch is a rectangular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156145.6A CN111130242A (en) | 2020-03-09 | 2020-03-09 | Permanent magnet synchronous motor rotor magnetic steel fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010156145.6A CN111130242A (en) | 2020-03-09 | 2020-03-09 | Permanent magnet synchronous motor rotor magnetic steel fixing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111130242A true CN111130242A (en) | 2020-05-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010156145.6A Pending CN111130242A (en) | 2020-03-09 | 2020-03-09 | Permanent magnet synchronous motor rotor magnetic steel fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111130242A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928877A (en) * | 2021-03-15 | 2021-06-08 | 慕贝尔汽车部件（太仓）有限公司 | Method for fastening permanent magnet in motor rotor core |
| WO2023236423A1 (en) * | 2022-06-08 | 2023-12-14 | 苏州范斯特机械科技有限公司 | Injection-molding-free magnetic steel iron core detection method, device and system |
| DE102022206623A1 (en) | 2022-06-29 | 2024-01-04 | Valeo Eautomotive Germany Gmbh | Improved fixation of rotor magnets in a rotor of an electrical machine |
-
2020
- 2020-03-09 CN CN202010156145.6A patent/CN111130242A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928877A (en) * | 2021-03-15 | 2021-06-08 | 慕贝尔汽车部件（太仓）有限公司 | Method for fastening permanent magnet in motor rotor core |
| WO2023236423A1 (en) * | 2022-06-08 | 2023-12-14 | 苏州范斯特机械科技有限公司 | Injection-molding-free magnetic steel iron core detection method, device and system |
| DE102022206623A1 (en) | 2022-06-29 | 2024-01-04 | Valeo Eautomotive Germany Gmbh | Improved fixation of rotor magnets in a rotor of an electrical machine |
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