CN111371265A - Manufacturing method of embedded permanent magnet motor rotor - Google Patents
Manufacturing method of embedded permanent magnet motor rotor Download PDFInfo
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- CN111371265A CN111371265A CN202010126162.5A CN202010126162A CN111371265A CN 111371265 A CN111371265 A CN 111371265A CN 202010126162 A CN202010126162 A CN 202010126162A CN 111371265 A CN111371265 A CN 111371265A
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- rotor
- permanent magnet
- glue solution
- slot
- core
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
- H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
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- Manufacturing & Machinery (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The embodiment of the application discloses a manufacturing method of an embedded permanent magnet motor rotor, relates to the technical field of motors, and aims to reduce the cost of a motor prototype rotor. The method comprises the following steps: laminating the rotor punching sheets to obtain a rotor core with a preset length; injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet; sleeving a central hole of an end plate and the central hole of the rotor core with the permanent magnet on a rotating shaft to prepare a rotor with glue solution; and (3) placing the rotor with the glue solution for a preset time to solidify the glue solution to prepare the prototype rotor. The application is suitable for manufacturing the rotor of the embedded permanent magnet motor.
Description
Technical Field
The application relates to the technical field of motors, in particular to a manufacturing method of an embedded permanent magnet motor rotor.
Background
The permanent magnet motor is a core component of a new energy automobile, whether the permanent magnet (magnetic steel) is fixed or not firmly influences the working performance of the permanent magnet motor, in order to structurally fix the permanent magnet to a certain extent, the conventional method is that a groove for placing the permanent magnet is embedded, so that the permanent magnet can be placed in a rotor core, in order to further enhance the fixing effect of the permanent magnet, when the rotor of the motor prototype is manufactured in the prior art, manual glue filling is adopted, the rotor core filled with glue is baked, the glue is cured, and then the rotor is manufactured into the permanent magnet motor by press mounting.
Disclosure of Invention
In view of this, the embodiment of the present application provides a method for manufacturing an embedded permanent magnet motor rotor, which is convenient for reducing the cost of the embedded permanent magnet motor prototype rotor.
The embodiment of the application provides a manufacturing method of an embedded permanent magnet motor rotor, which is applied to prototype production and comprises the following steps: laminating the rotor punching sheets to obtain a rotor core with a preset length, wherein the rotor core is provided with a central hole and an even number of rotor slots which are uniformly distributed along the circumferential direction, the inner diameter of each rotor slot is larger than the outer diameter of the central hole, and the outer diameter of each rotor slot is smaller than the outer diameter of the rotor core; injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet; sleeving a central hole of an end plate and the central hole of the rotor core with the permanent magnet on a rotating shaft to prepare a rotor with glue solution; and (3) placing the rotor with the glue solution for a preset time to solidify the glue solution to prepare the prototype rotor.
According to a specific implementation manner of the embodiment of the application, the step of placing the rotor with the glue solution for a preset time to solidify the glue solution to manufacture the prototype rotor comprises the following steps: and (3) placing the axis of the rotor with the glue solution along the vertical direction, and solidifying the glue solution to prepare the prototype rotor.
According to a specific implementation manner of the embodiment of the present application, injecting glue into each rotor slot, and inserting a permanent magnet into each rotor slot with the glue, includes: and injecting glue solution into each rotor slot, and inserting a permanent magnet into each rotor slot with the glue solution, wherein the glue solution can fill the gap between each rotor slot and the corresponding permanent magnet. .
According to a specific implementation manner of the embodiment of the application, the rotor core with the predetermined length includes: the rotor core comprises more than two rotor core segments, wherein the total axial length of the more than two rotor core segments is a preset length, and each rotor core segment is provided with an even number of first rotor slots which are uniformly distributed along the circumference; the said to every rotor slot, pour into the glue solution, and insert the permanent magnet in every rotor slot with glue solution, and make the said permanent magnet terminal surface level with the terminal surface of said rotor core, get the rotor core with permanent magnet, including: and injecting glue solution into a first rotor slot in the first rotor iron core section, correspondingly inserting a first permanent magnet into the first rotor slot with the glue solution, and enabling the end surface of the first permanent magnet to be flush with the end surface of the first rotor iron core section to obtain the first rotor iron core section with the first permanent magnet.
According to a specific implementation of the embodiment of the present application, each of the rotor core segments has a first central hole; the central hole of the end plate and the central hole of the rotor core with the permanent magnet are sleeved on the rotating shaft to manufacture the rotor with glue solution, and the method comprises the following steps: and sleeving the central hole of the end plate and the first central hole of each rotor iron core section on the rotating shaft to manufacture the rotor with glue solution.
According to a specific implementation manner of the embodiment of the application, before the axis of the rotating shaft of the rotor is placed along the vertical direction, the method further includes: and cleaning glue solution extruded from the rotor groove on the outer surface of the rotor.
According to the manufacturing method of the embedded permanent magnet motor rotor, the rotor core with the preset length is obtained by laminating rotor punching sheets, wherein the rotor core is provided with a central hole and an even number of rotor grooves which are uniformly distributed along the circumferential direction, the inner diameter of each rotor groove is larger than the outer diameter of the central hole, and the outer diameter of each rotor groove is smaller than the outer diameter of the rotor core; injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet; sleeving a central hole of an end plate and the central hole of the rotor core with the permanent magnet on a rotating shaft to prepare a rotor with glue solution; and the rotor with the glue solution is placed for a preset time, the glue solution is solidified to prepare a prototype rotor, and the solidification process of the glue solution is not required to be baked in the process of preparing the rotor, so that the electricity consumption cost is reduced, and the cost of the prototype rotor of the embedded permanent magnet motor is reduced conveniently.
Drawings
In order to more clearly illustrate the embodiments of the present application 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 some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart illustrating a method for manufacturing an embedded permanent magnet motor rotor according to an embodiment of the present application.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all 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 application.
Fig. 1 is a schematic flow chart of a manufacturing method of an embedded permanent magnet motor rotor according to an embodiment of the present application, as shown in fig. 1, applied to prototype production, where the method according to this embodiment may include:
The rotor punching sheet can be made of a magnetic conductive material; the rotor punching sheet can be manufactured into a rotor punching sheet with required specification by a silicon steel sheet with a certain thickness through a punching process; the rotor punching sheet has a predetermined thickness, in one example, the predetermined thickness can be 0.2mm, and in another example, the predetermined thickness can be 0.35 mm; the middle of the rotor punching sheet is provided with a through hole, an even number of through holes are arranged in the circumferential direction of the rotor punching sheet, and the through holes can be oval, rectangular or other irregular shapes; the shape of each through hole can be the same or different; the even number of through holes are uniformly distributed in the circumferential direction of the rotor punching sheet.
In one example, semicircular notches are distributed on the circumference of each rotor punching sheet and can be marked as positioning grooves, the rotor punching sheets are sequentially placed on a mandrel, and the corresponding positioning of each punching sheet is aligned; and applying pressure to the rotor punching sheets on the core shaft according to the designed number of the punching sheets and the preset length of the rotor core to obtain the rotor core with the preset length.
Through laminating the rotor punching sheets, a central hole is formed in the through hole in the middle of each rotor punching sheet; the corresponding through holes in the circumferential direction of each rotor punching sheet are aligned to form a rotor groove; the outer diameter of the in-line rotor slot is smaller than the outer diameter of the rotor core, and the inner diameter of the rotor slot is larger than the diameter of the center hole of the rotor core, so that the rotor slot is closed on the circumference and opened at both ends of the rotor core.
And 102, injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet.
The glue solution can be epoxy resin adhesive; when glue solution is injected into each rotor slot, the opening of the rotor slot at the end face of one end of the rotor core can be blocked by other tools, and the condition that the glue solution cannot flow out is taken as the standard; in one example, the rotor core can be placed along a direction that the axis is perpendicular to the horizontal plane, so that the glue solution can conveniently flow into the rotor slot from an opening at one end of one rotor slot; because the glue solution has certain viscosity, in order to make the glue solution pour into the other end of the rotor groove, the glue solution can stretch into different positions of the rotor groove through the glue pouring tube during glue pouring. In one example, the rotor slots may be filled manually.
In order to make the permanent magnet in each rotor slot stronger, in one example, injecting glue into each rotor slot and inserting a permanent magnet into each rotor slot with glue comprises: and injecting glue solution into each rotor slot, and inserting a permanent magnet into each rotor slot with the glue solution, wherein the glue solution can fill the gap between each rotor slot and the corresponding permanent magnet. The amount of glue is in particular obtained by subtracting the volume of the permanent magnets from the volume of the rotor slots.
The length of the permanent magnet may be equal to or slightly less than a predetermined length of the rotor core. The permanent magnets can be inserted from an opening at one end of the rotor slot until one end face of the permanent magnet is flush with the end face of the rotor core, so that the rotor core with the permanent magnets is obtained.
One slot can be filled with glue solution, a permanent magnet is inserted into the rotor slot, the end face of the permanent magnet is flush with the end face of the rotor core, and the process is repeated for other slots.
And 103, sleeving the central hole of the end plate and the central hole of the rotor core with the permanent magnet on the rotating shaft to manufacture the rotor with glue solution.
The number of the end plates can be 2, and the material of the end plates can be non-magnetic material; the outer diameter of the end plate can be the outer diameter of the rotor core, the inner diameter of the center hole of the end plate can be larger than the outer diameter of the rotating shaft, and the end plates at two ends of the rotating shaft can be fixed on the rotating shaft in the form of additional round nuts; the end plates at the two ends of the rotating shaft can also be fixed on the rotating shaft in a welding mode; the material of the rotating shaft can be a non-magnetic material and has preset mechanical strength so as to bear the torque of the motor in the working process; the central hole of the rotor core can be in interference fit with the outer diameter of the rotating shaft, so that the central hole of the rotor core with the permanent magnet is sleeved on the rotating shaft.
The two end plates are arranged at two ends and tightly pressed with the end parts of the rotor core, the rotor core with the permanent magnet is arranged between the two end plates, and the rotor slot on the rotor core is embedded, so that glue solution can be in a closed space, and the possibility that the glue solution flows out of the slot is avoided or reduced.
And step 104, placing the rotor with the glue solution for a preset time to solidify the glue solution to prepare a prototype rotor.
The length of the predetermined time may be determined by the curing of the glue, and the predetermined length may be related to the temperature, and in one example, the time for curing the glue may be 24 hours under room temperature conditions.
When the rotor is placed, the axis of the prototype rotor can be parallel to the horizontal plane, in order to improve the dynamic balance effect of the rotor, in one example, the axis of the rotor with the glue solution is placed along the vertical direction, the glue solution is solidified, and the prototype rotor is manufactured, so that the rotor can have a better dynamic balance effect.
The motor sample is mainly used for performance tests, and compared with an actual delivery motor, the motor sample has relatively low requirement on strength.
In this embodiment, according to the manufacturing method of the embedded permanent magnet motor rotor provided in the embodiment of the present application, a rotor core with a predetermined length is obtained by laminating rotor sheets, wherein the rotor core has a central hole and an even number of rotor slots uniformly distributed along a circumferential direction, an inner diameter of each rotor slot is larger than an outer diameter of the central hole, and an outer diameter of each rotor slot is smaller than an outer diameter of the rotor core; injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet; sleeving a central hole of an end plate and the central hole of the rotor core with the permanent magnet on a rotating shaft to prepare a rotor with glue solution; the rotor with the glue solution is placed for a preset time, the glue solution is solidified to form a prototype rotor, and the solidification process of the glue solution is not required to be baked in the process of manufacturing the rotor, so that the electricity consumption cost is reduced, the cost of the prototype rotor of the embedded permanent magnet motor is reduced, the manufacturing cost of the prototype motor is further reduced, the process that the solidified glue needs to be cleaned manually after baking is avoided, the labor cost is reduced, and the production efficiency is improved.
In order to achieve better fit among rotor core segments, between rotor core segments and between end plates and reduce labor cost for cleaning cured adhesive on the outer surface of a rotor core, in one example, the present embodiment is substantially the same as the previous embodiments except that before the axis of the rotating shaft of the rotor is placed in a vertical direction, the method further includes: and cleaning glue solution extruded from the rotor groove on the outer surface of the rotor.
To facilitate the pouring of the glue, in an example, this embodiment is substantially the same as the embodiment described in fig. 1, except that the rotor core with the predetermined length includes: the rotor core comprises more than two rotor core segments, wherein the total axial length of the more than two rotor core segments is a preset length, and each rotor core segment is provided with an even number of first rotor slots which are uniformly distributed along the circumference;
the said to every rotor slot, pour into the glue solution, and insert the permanent magnet in every rotor slot with glue solution, and make the said permanent magnet terminal surface level with the terminal surface of said rotor core, get the rotor core with permanent magnet, including:
and injecting glue solution into a first rotor slot in the first rotor iron core section, correspondingly inserting a first permanent magnet into the first rotor slot with the glue solution, and enabling the end surface of the first permanent magnet to be flush with the end surface of the first rotor iron core section to obtain the first rotor iron core section with the first permanent magnet.
The rotor core section can be formed by laminating a plurality of rotor punching sheets, and the punching number of each core section can be the same or different. The lamination method of each rotor core segment is the same as that of the aforementioned rotor core. The total axial length of the two or more rotor core segments is a predetermined length of the rotor core.
An even number of first rotor slots are uniformly distributed on each rotor core section along the circumferential direction, and the corresponding first rotor slots on all the rotor core sections form one slot of the rotor core.
The length of the first permanent magnet may be the length of the rotor core segment.
Injecting glue solution into the first rotor slot of each rotor iron core section, correspondingly inserting a first permanent magnet into the first rotor slot with the glue solution, and enabling the end surface of the first permanent magnet to be flush with the end surface of the first rotor iron core section to obtain the first rotor iron core section with the first permanent magnet, and obtaining more than two first rotor iron core sections with the first permanent magnets by using the iron core sections according to the method.
In one example, each of the rotor core segments has a first central bore;
the central hole of the end plate and the central hole of the rotor core with the permanent magnet are sleeved on the rotating shaft to manufacture the rotor with glue solution, and the method comprises the following steps:
and sleeving the central hole of the end plate and the first central hole of each rotor iron core section on the rotating shaft to manufacture the rotor with glue solution.
And respectively sleeving the central hole corresponding to each rotor core section on the rotating shaft, and enabling one rotor core section to be close to the adjacent rotor core section.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A manufacturing method of an embedded permanent magnet motor rotor is characterized by being applied to prototype production and comprising the following steps:
laminating the rotor punching sheets to obtain a rotor core with a preset length, wherein the rotor core is provided with a central hole and an even number of rotor slots which are uniformly distributed along the circumferential direction, the inner diameter of each rotor slot is larger than the outer diameter of the central hole, and the outer diameter of each rotor slot is smaller than the outer diameter of the rotor core;
injecting glue solution into each rotor slot, inserting a permanent magnet into each rotor slot with the glue solution, and enabling the end surface of each permanent magnet to be flush with the end surface of the rotor core to obtain the rotor core with the permanent magnet;
sleeving a central hole of an end plate and the central hole of the rotor core with the permanent magnet on a rotating shaft to prepare a rotor with glue solution;
and (3) placing the rotor with the glue solution for a preset time to solidify the glue solution to prepare the prototype rotor.
2. The method according to claim 1, wherein the step of placing the rotor with the glue for a predetermined time to solidify the glue to form a prototype rotor comprises: and (3) placing the axis of the rotor with the glue solution along the vertical direction, and solidifying the glue solution to prepare the prototype rotor.
3. The method according to claim 1, wherein the injecting the glue solution into each rotor slot and inserting the permanent magnet into each rotor slot with the glue solution comprises: and injecting glue solution into each rotor slot, and inserting a permanent magnet into each rotor slot with the glue solution, wherein the glue solution can fill the gap between each rotor slot and the corresponding permanent magnet.
4. The method of claim 1, wherein the predetermined length of the rotor core comprises: the rotor core comprises more than two rotor core segments, wherein the total axial length of the more than two rotor core segments is a preset length, and each rotor core segment is provided with an even number of first rotor slots which are uniformly distributed along the circumference;
the said to every rotor slot, pour into the glue solution, and insert the permanent magnet in every rotor slot with glue solution, and make the said permanent magnet terminal surface level with the terminal surface of said rotor core, get the rotor core with permanent magnet, including:
and injecting glue solution into a first rotor slot in the first rotor iron core section, correspondingly inserting a first permanent magnet into the first rotor slot with the glue solution, and enabling the end surface of the first permanent magnet to be flush with the end surface of the first rotor iron core section to obtain the first rotor iron core section with the first permanent magnet.
5. The method of claim 4, wherein each of said rotor core segments has a first central bore;
the central hole of the end plate and the central hole of the rotor core with the permanent magnet are sleeved on the rotating shaft to manufacture the rotor with glue solution, and the method comprises the following steps:
and sleeving the central hole of the end plate and the first central hole of each rotor iron core section on the rotating shaft to manufacture the rotor with glue solution.
6. The method of claim 2, wherein prior to placing the axis of the rotor's shaft in a vertical direction, the method further comprises: and cleaning glue solution extruded from the rotor groove on the outer surface of the rotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126162.5A CN111371265B (en) | 2020-02-27 | 2020-02-27 | Manufacturing method of embedded permanent magnet motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010126162.5A CN111371265B (en) | 2020-02-27 | 2020-02-27 | Manufacturing method of embedded permanent magnet motor rotor |
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| CN111371265A true CN111371265A (en) | 2020-07-03 |
| CN111371265B CN111371265B (en) | 2021-08-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5627423A (en) * | 1993-06-11 | 1997-05-06 | Askoll S.P.A. | Permanent-magnet rotor for electric motors and method of manufacturing the same |
| JPH10126988A (en) * | 1996-10-18 | 1998-05-15 | Sanyo Electric Co Ltd | Rotor for motor |
| CN106487171A (en) * | 2016-10-19 | 2017-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of fixing meanss of magnet steel, rotor assembly and motor |
| CN108028564A (en) * | 2015-09-02 | 2018-05-11 | 日立汽车系统株式会社 | The manufacture method of rotor, the electric rotating machine for being equipped with rotor and rotor |
| CN108988532A (en) * | 2018-08-10 | 2018-12-11 | 安徽鸿创新能源动力有限公司 | A kind of rotor and whole glue injection method of entirety injecting glue |
| CN110752687A (en) * | 2011-11-29 | 2020-02-04 | 住友电木株式会社 | Resin composition for fixing, rotor, automobile, and method for producing rotor |
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2020
- 2020-02-27 CN CN202010126162.5A patent/CN111371265B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5627423A (en) * | 1993-06-11 | 1997-05-06 | Askoll S.P.A. | Permanent-magnet rotor for electric motors and method of manufacturing the same |
| JPH10126988A (en) * | 1996-10-18 | 1998-05-15 | Sanyo Electric Co Ltd | Rotor for motor |
| CN110752687A (en) * | 2011-11-29 | 2020-02-04 | 住友电木株式会社 | Resin composition for fixing, rotor, automobile, and method for producing rotor |
| CN108028564A (en) * | 2015-09-02 | 2018-05-11 | 日立汽车系统株式会社 | The manufacture method of rotor, the electric rotating machine for being equipped with rotor and rotor |
| CN106487171A (en) * | 2016-10-19 | 2017-03-08 | 珠海格力节能环保制冷技术研究中心有限公司 | A kind of fixing meanss of magnet steel, rotor assembly and motor |
| CN108988532A (en) * | 2018-08-10 | 2018-12-11 | 安徽鸿创新能源动力有限公司 | A kind of rotor and whole glue injection method of entirety injecting glue |
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| CN111371265B (en) | 2021-08-24 |
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