CN113437843A - Rotor structure based on neodymium iron boron magnetic steel and manufacturing method - Google Patents
Rotor structure based on neodymium iron boron magnetic steel and manufacturing method Download PDFInfo
- Publication number
- CN113437843A CN113437843A CN202110779000.6A CN202110779000A CN113437843A CN 113437843 A CN113437843 A CN 113437843A CN 202110779000 A CN202110779000 A CN 202110779000A CN 113437843 A CN113437843 A CN 113437843A
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- magnetic steel
- rotor
- back iron
- rotor back
- iron boron
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 50
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 134
- 229910052742 iron Inorganic materials 0.000 claims abstract description 67
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000003825 pressing Methods 0.000 claims description 6
- 238000007711 solidification Methods 0.000 claims description 6
- 230000008023 solidification Effects 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 230000005415 magnetization Effects 0.000 claims description 3
- 238000001962 electrophoresis Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 13
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000000465 moulding Methods 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000006247 magnetic powder Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010791 quenching Methods 0.000 description 3
- 230000000171 quenching effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- H02K1/2706—Inner rotors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention provides a rotor structure based on neodymium iron boron magnetic steel and a manufacturing method thereof, wherein the rotor structure comprises a rotor back iron, the rotor back iron is provided with a magnetic steel groove, the magnetic steel groove is annular, a bonding neodymium iron boron mixture injected into the magnetic steel groove is solidified to form magnetic steel, the magnetic steel is solidified by adopting the bonding neodymium iron boron mixture, so that the magnetic steel is simultaneously bonded to the rotor back iron, only the molding process is simple and convenient, the consistency of the required size of a rotor is ensured, the air gap between the magnetic steel and the rotor back iron is reduced, the magnetic utilization rate of the magnetic steel is improved, the waste of the magnetic steel is avoided, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of rotors, in particular to a rotor structure based on neodymium iron boron magnetic steel and a manufacturing method thereof.
Background
The radial magnetic field motor and the axial magnetic field motor (also called as a disc motor) are two major branches of the motor field, and the disc motor is widely applied to the fields of the automobile industry, wind power generation and the like, wherein the disc motor has larger radial size, smaller axial size, large rotational inertia and stable operation, and compared with the radial magnetic field motor, the disc motor has the characteristics of short axial size, small size, light weight, high power density and the like.
From the rotor structure of the disc motor at present, the magnetic steel is designed as a single piece, each piece of magnetic steel is matched with the back iron of the rotor through a concave-convex structure, and is bonded by glue or positioned by a mechanical mechanism, so that the single piece of magnetic steel is arranged according to NS poles. Wherein glue is easy to lose efficacy after long-term operation, and the rotor is in high-speed rotation at the motor working process, therefore the phenomenon that the magnet steel can become flexible and drop to influence disk motor's performance. The bolts are affected by the mounting process and are also prone to shedding during the high-speed rotation of the rotor. In addition, the process is complex, the consistency of the rotor cannot be guaranteed, the utilization rate of the magnetic steel is low, and the problems of high production cost and the like are easily caused.
Disclosure of Invention
In order to solve the problems, the invention provides a rotor structure based on neodymium iron boron magnetic steel and a manufacturing method thereof, wherein the utilization rate of the magnetic steel is effectively improved, and the size consistency of a rotor is ensured.
According to one aspect of the present invention, there is provided a manufacturing method comprising:
(a) fixing a rotor back iron on a die, and exposing a magnetic steel groove on the rotor back iron to the outside of the die;
(b) forming a bonded neodymium iron boron mixture, wherein the bonded neodymium iron boron mixture is injected into the magnetic steel groove through a pressing device;
(c) and curing the bonded neodymium iron boron mixture to obtain the cured magnetic steel and integrally forming the magnetic steel in the rotor back iron so as to obtain the rotor structure.
As a preferred technical solution, the mold has a limiting portion, so that the step (a) further includes: (a1) the rotor back iron is positioned at the limiting part.
As a preferred embodiment, the step (c) further comprises:
(c1) the rotor back iron is ejected out of the mold relative to the limiting part;
(c2) and the rotor back iron flows to a temperature control device to solidify the bonded neodymium iron boron mixture.
Preferably, an ejector is connected to the position-limiting portion, so that the step (c1) further includes: (c11) and driving the rotor back iron to be ejected by the ejecting piece.
As a preferred technical solution, the method further comprises, after the step (c):
(d) and grinding the exposed surface of the magnetic steel by a grinder, and flatly forming the exposed surface of the magnetic steel.
As a preferred technical solution, the method further comprises, after the step (d): (e) and cleaning, electrophoresis and magnetization treatment are carried out on the rotor structure.
According to another aspect of the invention, the invention further provides a rotor structure based on the neodymium iron boron magnetic steel, which comprises a rotor back iron, wherein the rotor back iron is provided with a magnetic steel groove, the magnetic steel groove is annular, and the bonded neodymium iron boron mixture injected into the magnetic steel groove is solidified to form the magnetic steel.
As a preferred technical solution, the rotor back iron includes a bottom wall, an inner ring side wall and an outer ring outer side wall, the bottom wall is annular, and the inner and outer peripheries of the bottom wall extend in the same direction to form the inner ring side wall and the outer ring side wall, so that the magnetic steel slot is defined between the bottom wall, the inner ring side wall and the outer ring side wall.
Preferably, the extension dimensions of the inner ring side wall and the outer ring side wall are the same.
As a preferred technical scheme, the exposed surfaces of the magnetic steels are flush with the side wall of the inner ring and the side wall of the outer ring respectively.
Preferably, the dimension of the magnetic steel in the axial direction of the rotor is greater than or equal to the dimension of the bottom wall in the axial direction of the rotor.
Preferably, a ratio of the dimensions of the outer ring side wall and the inner ring side wall in the radial direction of the rotor is not less than 1/3.
As a preferred technical scheme, a plurality of fixing holes are formed in the side wall of the inner ring.
Preferably, the plurality of fixing holes are arranged at equal intervals along the circumferential direction of the rotor.
Preferably, the distance from the center of the rotor back iron to the center of the fixing hole is greater than or equal to the radius of the rotor back iron.
Preferably, the inner ring side wall defines a shaft hole, and a key groove communicating with the shaft hole is formed in the inner ring side wall.
Compared with the prior art, the technical scheme has the following advantages:
the bonding neodymium iron boron mixture is formed by mixing fast quenching neodymium iron boron magnetic powder and binder, and wherein the binder can be glue etc. visible pack in the magnetism steel inslot bonding neodymium iron boron mixture experiences liquid to solid-state conversion process and solidification under the control by temperature change effect, and then forms the magnet steel, and utilizes the viscidity of bonding neodymium iron boron mixture to make fashioned magnet steel bond simultaneously and be fixed in on the rotor back iron, not only forming process is simple and convenient, guarantees the uniformity of the required size of rotor, has still reduced the air gap of magnet steel and rotor back iron improves magnet steel magnetism utilization ratio, avoids the magnet steel extravagant, thereby reduces the cost.
The invention is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a flow chart of a manufacturing method according to the present invention;
FIG. 2 is a schematic structural diagram of a rotor structure based on NdFeB magnetic steel according to the present invention;
fig. 3 is a cross-sectional view of the rotor structure based on ndfeb magnetic steel according to the present invention.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.
As shown in fig. 1, the manufacturing method includes:
(a) fixing a rotor back iron on a die, and exposing a magnetic steel groove on the rotor back iron to the outside of the die;
(b) forming a bonded neodymium iron boron mixture, wherein the bonded neodymium iron boron mixture is injected into the magnetic steel groove through a pressing device;
(c) and curing the bonded neodymium iron boron mixture to obtain the cured magnetic steel and integrally forming the magnetic steel in the rotor back iron so as to obtain the rotor structure.
The bonding neodymium iron boron mixture is formed by mixing fast quenching neodymium iron boron magnetic powder and binder, and wherein the binder can be glue etc. visible packing in the magnet steel inslot bonding neodymium iron boron mixture experiences liquid to solid-state conversion process and solidification under the control by temperature change effect, and then forms the magnet steel, and utilizes the extremely strong adhesive property of bonding neodymium iron boron mixture to make fashioned magnet steel bond simultaneously and be fixed in on the rotor back iron, not only forming process is simple and convenient, guarantees the required size's of rotor uniformity, has still reduced the air gap of magnet steel and rotor back iron improves magnet steel magnetism utilization ratio, avoids the magnet steel extravagant, thereby reduces the cost.
The mold can be fixed on a workbench, and a limiting part can be arranged on the end surface of the mold far away from the workbench, so that the step (a) further comprises the following steps: (a1) the rotor back iron is positioned at the limiting part.
Through setting up spacing portion to prevent to fix rotor back iron on the mould takes place the displacement, and influences follow-up press device right the injection of magnetic steel groove bonding neodymium iron boron mixture. The limiting parts can be grooves, and the grooves are matched with the rotor back iron in shape and can be round. Namely, one side of the rotor back iron, which is far away from the magnetic steel slot, is embedded in the slot, so that the magnetic steel slot is exposed outside the die. The depth of the groove is shallow and can be less than or equal to 1/5 along the axial dimension of the rotor back iron, so that the deep groove is prevented from influencing subsequent ejection.
In the step (b), the bonded neodymium iron boron mixture can be stored in the pressing device, and when the pressing device moves to the position where the magnetic steel grooves are opposite, the bonded neodymium iron boron mixture is injected into the magnetic steel grooves and reset. Certainly the press device can keep in the top of mould, after fixing on the mould rotor back iron, the press device directly to the magnet steel inslot pours into bonding neodymium iron boron mixture.
Further, by means of the pressing device, a plurality of regions of the bonded neodymium iron boron mixture arranged at intervals can be injected into the magnetic steel groove to form a plurality of fan-shaped magnetic steels arranged at intervals. Of course, an annular bonding neodymium iron boron mixture area can be injected into the magnetic steel groove and formed so as to form an annular magnetic steel. Therefore, a relatively complex magnetic steel structure can be manufactured according to the requirement, and diversified multi-stage magnetizing orientations can be realized.
The step (c) further comprises:
(c1) the rotor back iron is ejected out of the mold relative to the limiting part;
(c2) and the rotor back iron flows to a temperature control device to solidify the bonded neodymium iron boron mixture.
The rotor back iron is pouring into behind the bonding neodymium iron boron mixture, follow break away from on the mould, then flow to temperature control device, by temperature control device is right the bonding neodymium iron boron mixture solidifies to obtain the fashioned magnet steel.
The releasing of the rotor back iron from the mold may be performed manually or automatically, wherein automatically may be performed by an ejector, specifically, an ejector is connected in the stopper, so that the step (c1) further includes: (c11) and driving the rotor back iron to be ejected by the ejecting piece.
More specifically, the ejector may be embedded in the limiting portion, and when the ejection operation is performed, the ejector extends into the limiting portion, so that the rotor back iron is ejected from the limiting portion. The ejection piece can be driven by a cylinder or a motor, and can be made of soft materials such as rubber and the like so as to prevent the rotor back iron from being damaged due to rigid contact with the rotor back iron.
In the step (c2), the process of the rotor back iron can be performed manually or automatically, wherein automatically the rotor back iron can be transported by a conveyor belt. The temperature control device can be an oven. The temperature and time of the oven to cure the bonded neodymium iron boron mixture may be determined according to the volume of the bonded neodymium iron boron mixture.
Further comprising after said step (c):
(d) and grinding the exposed surface of the magnetic steel by a grinder, and flatly forming the exposed surface of the magnetic steel. Thereby guarantee flatness and parallelism, further guarantee the required size uniformity of rotor.
As a preferred technical solution, the method further comprises, after the step (d): (e) and cleaning and electrophoresing the rotor structure to finish surface coating, and finally carrying out integral magnetization.
To sum up, the bonding neodymium iron boron mixture is formed by mixing fast quenching neodymium iron boron magnetic powder and binder, and wherein the binder can be glue etc. and can be seen to pack in the magnet steel inslot bonding neodymium iron boron mixture experiences liquid to solid-state conversion process and solidification under the control by temperature change effect, and then forms the magnet steel, and utilizes the viscidity of bonding neodymium iron boron mixture to make fashioned magnet steel bond simultaneously and be fixed in on the rotor back iron, not only forming process is simple and convenient, guarantees the uniformity of the required size of rotor, has still reduced the air gap of magnet steel and rotor back iron improves magnet magnetism utilization ratio, avoids the magnet steel extravagant, thereby reduces the cost.
As shown in fig. 2 and 3, rotor structure based on neodymium iron boron magnetic steel includes a rotor back iron 100, rotor back iron 100 has a magnet steel groove 1000, magnet steel groove 1000 is the annular, pours into the solidification of bonding neodymium iron boron mixture in magnet steel groove 1000 forms magnet steel 200 to make magnet steel 200 integrated into one piece in rotor back iron 100.
As shown in fig. 2 and 3, the rotor back iron 100 includes a bottom wall 110, an inner ring side wall 120 and an outer ring outer side wall 130, the bottom wall 110 is annular, and inner and outer peripheries of the bottom wall 110 extend in the same direction to form the inner ring side wall 120 and the outer ring side wall 130, so as to define the magnetic steel slot 1000 between the bottom wall 110, the inner ring side wall 120 and the outer ring side wall 130.
Since the bottom wall 110, the inner ring sidewall 120 and the outer ring sidewall 130 are all annular, the magnetic steel slot 1000 defined thereby is also annular. Referring to fig. 3, the extension dimensions of the inner ring side 120 and the outer ring side 130 are the same, that is, the inner ring side 120 and the outer ring side 130 are the same along the axial dimension of the rotor, and the inner ring side 120 and the outer ring side 130 are respectively flush with the sides far away from the bottom wall 110, so as to ensure the parallelism and the planeness of the rotor and avoid the generation of rotational vibration and noise due to the poor planeness of the rotor.
Preferably, the exposed surfaces of the magnetic steel 200 are flush with the inner ring sidewall 120 and the outer ring sidewall 130, respectively. The exposed surface of the magnetic steel 200 refers to the side of the magnetic steel 200, which is away from the bottom wall 110, held in the steel groove 1000, and thus, the magnetic steel 200, the inner ring side wall 120, and the outer ring side wall 130 are flush with one side, which is away from the bottom wall 110, of the bottom wall 110, respectively, and the flatness of the rotor is further ensured.
As shown in fig. 3, the dimension of the magnetic steel 200 in the axial direction of the rotor is greater than or equal to the dimension of the bottom wall 110 in the axial direction of the rotor, so as to prevent the magnetic steel 200 from being too small in the axial direction of the rotor to affect the performance of the magnetic steel 200 after being magnetized, and prevent the bottom wall 110 from being too small in the axial direction of the rotor to affect the structural strength of the rotor back iron 100.
As shown in fig. 2, the ratio of the sizes of the outer ring side wall 130 and the inner ring side wall 120 in the rotor radial direction is not less than 1/3.
It can be seen that the inner ring side wall 120 has a large area, and a fixing hole 121 and a shaft hole 122 for connecting a rotating shaft are formed in the inner ring side wall 120, specifically, a plurality of fixing holes 121 are formed in the inner ring side wall 120, and the fixing holes 121 can be fixed to one by fasteners, so as to fix the rotor back iron 100. The inner ring side wall 120 defines a shaft hole 122, a key groove 123 communicating with the shaft hole 122 is formed on the inner ring side wall 122, and the key groove 123 is used for being matched with a key of the rotating shaft so as to prevent the rotating shaft and the rotor from rotating circumferentially.
With continued reference to fig. 2, the number of the fixing holes 121 may be six and may be arranged at equal intervals along the circumferential direction of the rotor to make the connection stress of the rotor uniform and prevent the rotor from local axial vibration during rotation.
With continued reference to fig. 2, the distance from the center of the rotor back iron 100 to the center of the fixing hole 121, which is greater than or equal to the radius of the rotor back iron 100, is seen that the fixing hole 121 is close to the magnetic steel 200. Because the magnetic steel 200 is close to the outer peripheral edge of the rotor back iron 100, and the outer peripheral edge of the rotor back iron 100 is heavier than the center weight of the rotor back iron 100, the fixing hole 121 is close to the magnetic steel 200, so that the fixing effect of the rotor is improved.
In conclusion, the magnetic steel 200 is formed by solidifying the bonded neodymium iron boron mixture, so that the magnetic steel 200 is bonded to the rotor back iron 100 at the same time, only the forming process is simple and convenient, the consistency of the required size of the rotor is ensured, the air gap between the magnetic steel and the rotor back iron is also reduced, the magnetic utilization rate of the magnetic steel is improved, the waste of the magnetic steel is avoided, and the cost is reduced.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and the scope of the present invention is not limited by the embodiments, i.e. all equivalent changes or modifications made in the spirit of the present invention are still within the scope of the present invention.
Claims (10)
1. A method of manufacture, comprising:
(a) fixing a rotor back iron on a die, and exposing a magnetic steel groove on the rotor back iron to the outside of the die;
(b) forming a bonded neodymium iron boron mixture, wherein the bonded neodymium iron boron mixture is injected into the magnetic steel groove through a pressing device;
(c) and curing the bonded neodymium iron boron mixture to obtain the cured magnetic steel and integrally forming the magnetic steel in the rotor back iron so as to obtain the rotor structure.
2. The method of claim 1, wherein the mold has a stopper portion, such that step (a) further comprises: (a1) the rotor back iron is positioned at the limiting part.
3. The method of manufacturing of claim 2, wherein step (c) further comprises:
(c1) the rotor back iron is ejected out of the mold relative to the limiting part;
(c2) and the rotor back iron flows to a temperature control device to solidify the bonded neodymium iron boron mixture.
4. The method of claim 3, wherein an ejector is attached to the retainer portion, such that step (c1) further comprises: (c11) and driving the rotor back iron to be ejected by the ejecting piece.
5. The method of manufacturing of claim 1, further comprising, after step (c):
(d) and grinding the exposed surface of the magnetic steel by a grinder, and flatly forming the exposed surface of the magnetic steel.
6. The method of manufacturing of claim 5, further comprising, after step (d): (e) and cleaning, electrophoresis and magnetization treatment are carried out on the rotor structure.
7. The utility model provides a rotor structure based on neodymium iron boron magnetic steel, its characterized in that, includes a rotor back iron, the rotor back iron has a magnetic steel groove, the magnetic steel groove is the annular, pours into the solidification of bonding neodymium iron boron mixture in the magnetic steel groove forms the magnet steel.
8. The ndfeb magnet-based rotor structure according to claim 7, wherein the rotor back iron includes a bottom wall, an inner ring sidewall and an outer ring sidewall, the bottom wall is annular, and the inner and outer peripheries of the bottom wall respectively extend in the same direction to form the inner ring sidewall and the outer ring sidewall, so as to define the magnetic steel slot between the bottom wall, the inner ring sidewall and the outer ring sidewall.
9. The ndfeb magnet-based rotor structure of claim 8, wherein the exposed surfaces of the magnets are flush with the inner and outer ring sidewalls, respectively.
10. The ndfeb magnet-based rotor structure according to claim 8, wherein the ratio of the sizes of the outer ring side wall and the inner ring side wall in the radial direction of the rotor is not less than 1/3.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779000.6A CN113437843A (en) | 2021-07-09 | 2021-07-09 | Rotor structure based on neodymium iron boron magnetic steel and manufacturing method |
| PCT/CN2021/117973 WO2023279525A1 (en) | 2021-07-09 | 2021-09-13 | Rotor structure based on neodymium-iron-boron magnetic steel and manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110779000.6A CN113437843A (en) | 2021-07-09 | 2021-07-09 | Rotor structure based on neodymium iron boron magnetic steel and manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113437843A true CN113437843A (en) | 2021-09-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110779000.6A Pending CN113437843A (en) | 2021-07-09 | 2021-07-09 | Rotor structure based on neodymium iron boron magnetic steel and manufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113437843A (en) |
| WO (1) | WO2023279525A1 (en) |
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| JP2001118710A (en) * | 1999-10-15 | 2001-04-27 | Matsushita Electric Ind Co Ltd | Rare-earth-resin magnet and magnet rotor |
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| CN202019248U (en) * | 2010-09-21 | 2011-10-26 | 中山市港联华凯电器制品有限公司 | DC motor rotor used for decorative ceiling fan |
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| CN107733113A (en) * | 2017-11-14 | 2018-02-23 | 利欧集团浙江泵业有限公司 | Novel motor rotor punching and its preparation technology |
| CN212969210U (en) * | 2020-07-16 | 2021-04-13 | 江门市邦特电子电器有限公司 | Permanent magnet ring, motor using permanent magnet ring and manufacturing die |
| CN215071857U (en) * | 2021-07-09 | 2021-12-07 | 浙江盘毂动力科技有限公司 | Rotor structure based on neodymium iron boron magnetic steel |
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2021
- 2021-07-09 CN CN202110779000.6A patent/CN113437843A/en active Pending
- 2021-09-13 WO PCT/CN2021/117973 patent/WO2023279525A1/en unknown
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| CN1901322A (en) * | 2006-07-24 | 2007-01-24 | 广州金南磁塑有限公司 | Moulding press composite adhesive magnetic tile and its preparing method |
| US20170025933A1 (en) * | 2014-04-02 | 2017-01-26 | Aichi Steel Corporation | Method and apparatus for manufacturing interior permanent magnet-type inner rotor |
| CN105405570A (en) * | 2014-09-12 | 2016-03-16 | 上海日立电器有限公司 | Magnetizing method of bonded neodymium iron boron ring magnet for compressor |
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| CN209001700U (en) * | 2018-11-23 | 2019-06-18 | 擎声自动化科技（上海）有限公司 | The fixed structure of rotor magnetic steel and turntable |
| CN111509883A (en) * | 2019-01-31 | 2020-08-07 | 上海盘毂动力科技股份有限公司 | Rotor assembly and axial magnetic field motor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023279525A1 (en) | 2023-01-12 |
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Application publication date: 20210924 |