CN107147256A - A kind of forming method of permanent-magnet ferrite rotor - Google Patents
A kind of forming method of permanent-magnet ferrite rotor Download PDFInfo
- Publication number
- CN107147256A CN107147256A CN201710483174.1A CN201710483174A CN107147256A CN 107147256 A CN107147256 A CN 107147256A CN 201710483174 A CN201710483174 A CN 201710483174A CN 107147256 A CN107147256 A CN 107147256A
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- CN
- China
- Prior art keywords
- permanent
- rotor
- magnet ferrite
- rotor core
- magnet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a kind of permanent-magnet ferrite rotor forming method of magneto, step is as follows：A, the rotor core interval of design regular prism shape uniformly open up multiple axially extending bores；B, design bread shape permanent-magnet ferrite；C, permanent magnet inner plane are attached on each side of rotor core one by one, adjacent permanent magnet bodyside plan is fitted, it is put into together in mould, its die cavity internal diameter of mould is matched with rotor diameter to be formed, and die cavity madial wall and the eccentric extrados formation interstitial spaces of two or two adjoinings, injection machine makes molten plastic fill interstitial spaces, axially extending bore and cladding permanent magnet transverse plane, rotor core bottom surface respectively toward pressure injection molten plastic in mould；D, the cage type moulding cooled and solidified and rotor core, permanent-magnet ferrite are molded as one formula rotor jointly, and the eccentric extrados of its outer peripheral edge profile of rotor and each permanent-magnet ferrite is misaligned.The rotor assembling procedure being molded by this method is simple, fixed reliable, and ensures that rotor exterior magnetic field is sinusoidal waveform.
Description
【Technical field】
The present invention relates to a kind of forming method of permanent-magnet ferrite rotor, belong to permanent magnet machine rotor technical field.
【Background technology】
Permanent magnet is assembled together with rotor core to be by means of upper and lower end cap and upper and lower protecting cover and is fixed into by rivet
For PM rotor, indispensable assembling procedure known in PM rotor needs six could be molded, and there is assembling procedure
Numerous and diverse deficiency.Permanent magnet is typically used adhesive surface-mount type inefficiently by permanent magnet and being connected for rotor core piecewise
On side fixed to rotor core, this surface bonding way is unfavorable for the maintenance of rotor, and rotor core is split with permanent magnet
Difficult easy damaged.When needing to change rotor core, permanent magnet easily undermined during peeling off rotor core it is original-pack can normal work
The permanent magnet of work；And when needing to peel off the permanent magnet of certain piece corrupted, easily injure rotor core, rotor iron will be caused when serious
Core is scrapped.Furthermore, come off in rotor rotation process because centrifugal force easily causes the permanent magnet being bonded by jelly.
【The content of the invention】
It is an object of the invention to provide a kind of forming method of permanent-magnet ferrite rotor, rotor assembling is efficient, process is simple,
The permanent-magnet ferrite rotor being molded by this method, not only fixed permanent is reliable, and permanent magnet can be born under rotation operating mode at a high speed
Produce big centrifugal force and do not fall off, and ensure rotor exterior magnetic field be sinusoidal waveform.
Therefore, the present invention is adopted the following technical scheme that：
A kind of forming method of permanent-magnet ferrite rotor, this method is realized using following steps：
A, rotor core are designed to regular prism shape, have at rotor core center on axis hole, rotor core evenly and at intervals
Multiple axially extending bores are opened up, rotor core is obtained through designing post-processing.
B, permanent magnet selection and design：Using permanent-magnet ferrite, bread shape is designed to, the permanent-magnet ferrite has one
Inner plane, eccentric extrados, symmetrical two side planes and symmetrical two transverse planes, the piece number of permanent-magnet ferrite and one
The number of individual its side of rotor core is equal, the permanent-magnet ferrite of piece number needed for being obtained after design.
The permanent-magnet ferrite and rotor core that c, design are obtained are molded：First above-mentioned permanent-magnet ferrite is attached to piecewise and turned
On each side of sub- iron core, make the side laminating corresponding with rotor core of the inner plane of every permanent-magnet ferrite, and it is adjacent
The side plane of permanent-magnet ferrite is mutually fitted, and the permanent-magnet ferrite is then put into the mould of injection machine together with rotor core
In, the internal diameter of its die cavity of mould is matched with the external diameter of rotor to be formed, and the madial wall of die cavity and the eccentric outer arc of two or two adjoinings
Face is collectively forming interstitial spaces, and then injection machine makes molten plastic fill the interval respectively toward pressure injection molten plastic in mould
Space, axially extending bore, and molten plastic is coated two transverse planes of the permanent-magnet ferrite and two bottoms of rotor core
Face.
D, cooling solidify afterwards shaping：Injection is finished is formed as a cage type note after the molten plastic in die cavity is cooled and solidified
Plastic, the cage type moulding is molded as one formula rotor jointly with rotor core, permanent-magnet ferrite, wherein, its periphery of the rotor
The eccentric extrados of edge profile and each permanent-magnet ferrite is misaligned.
It has 4+2n bars side to above-mentioned rotor core in each bottom surface of regular polygon, wherein, n=0~4.
Molten plastic in above-mentioned steps c uses non-permeable material.
Compared with prior art, the invention has the advantages that and beneficial effect：
1st, permanent-magnet ferrite is designed to bread shape, bread shape permanent-magnet ferrite and the rotor core phase for being designed as regular prism shape
Coordinate, and make it that the eccentric extrados of permanent-magnet ferrite and rotor its outer peripheral edge profile after being molded are misaligned, permanent-magnet ferrite
Design and the design of rotor core can ensure that rotor exterior magnetic field of the present invention is sinusoidal waveform.
2nd, using the fixed method of injection, multi-disc permanent-magnet ferrite is able to being fixedly connected for rotor core by injection
It is fixed-type, cage type moulding, permanent-magnet ferrite and rotor core is integrally fixed, realize the inclined of whole permanent-magnet ferrites
The circumferentially fixed shaping of heart extrados, and the bottom surface of rotor core and the transverse plane of permanent-magnet ferrite are wrapped by and are fixed into jointly
Type, this assembled formation method process of rotor is greatly simplified, and work efficiency is high.
3rd, the mould filling of axially extending bore can make cage type moulding structure more firm, durable, with reference to cage type moulding pair
Permanent-magnet ferrite circumferentially fixed and to permanent-magnet ferrite transverse plane and the fixation of rotor core bottom surface, rotor rotation production
Raw centrifugal force still ensures that permanent-magnet ferrite continues to be fixed without coming off by reliable, has abandoned prior art permanent magnet needs
It is adhered to the outer surface of rotor core piecewise with adhesive, the bonding that may be present of indivedual permanent magnets in full rotor can be avoided
Defect.
4th, the permanent-magnet ferrite rotor that this method method is obtained can be advantageously from external damage cage type note with low cost
Plastic realizes disassembling for rotor.When that need to be repaired because of rotor core damage, the replacing of rotor core is not undermined can be normal
The permanent-magnet ferrite of work；And when that need to be repaired because of the damage of certain piece permanent-magnet ferrite, it is only necessary to replace that piece of damage forever
Magnetic ferrites, will not undermine rotor core good for use, and intact rotor core and intact number can be utilized when being molded again
Permanent-magnet ferrite, be not to scrap whole rotor.
【Brief description of the drawings】
Fig. 1 is the stereogram of the rotor core of the present invention；
Fig. 2 is Fig. 1 top view；
Fig. 3 is the stereogram of the permanent-magnet ferrite of the present invention；
Fig. 4 is the schematic diagram that permanent-magnet ferrite is attached on each side of rotor core；
Fig. 5 is schematically shown outside outer peripheral edge profile (part) line and wherein a piece of its bias of permanent-magnet ferrite of rotor
The schematic diagram of circle (part) where cambered surface；
Fig. 6 schematically shows the schematic diagram of rotor core and permanent-magnet ferrite injection；
Fig. 7 is the stereogram of cage type moulding；
Fig. 8 is the signal that cage type moulding is molded as one formula rotor with rotor core, permanent-magnet ferrite jointly after being molded
Figure；
Fig. 9 is the schematic diagram (sinusoidal waveform) of the external magnetic field waveform of hexapole permanent magnet ferrite rotor.
【Embodiment】
Refer to shown in Fig. 1,2,3,4,5,6,7,8, a kind of forming method of permanent-magnet ferrite rotor, this method is to use
What following steps were realized：
1) rotor core 1 is designed to regular prism shape, has axis hole 10 at the center of rotor core 1, around axis hole 10 in rotor
Multiple axially extending bores 100 are opened up on iron core 1 evenly and at intervals, rotor core 1 is obtained through designing post-processing.
See Fig. 1,2, the rotor core 1 in the present embodiment is positive six prismsby shape, and the rotor core 1 of the positive six prismsby shape has
There are two bottom surfaces 12 and six sides 11, axially extending bore 100 is evenly distributed with six.
Rotor core 1 can be processed using prior art, such as by the rotor punching of multi-disc regular hexagon after stack
Formed in corner welding, the present embodiment rotor core 1 is preferentially obtained using the rotor punching of multi-disc regular hexagon through folded riveting.
2) selection and design of permanent magnet：The permanent magnet of the present invention is the permanent-magnet ferrite for using ferrite for magnetic material
2, permanent-magnet ferrite 2 is designed to bread shape, and the permanent-magnet ferrite 2 has inner plane 21, eccentric extrados 23, symmetrical
Two side planes 24 and symmetrical two transverse planes 22, the piece number of permanent-magnet ferrite 2 and its side 11 of rotor core 1
Number is equal, and the permanent-magnet ferrite 2 of piece number, is shown in Fig. 3 needed for being obtained after design.
Such as Fig. 3,4, the rotor core 1 of a positive six prismsby shape needs the permanent-magnet ferrite 2 of six quantity supporting, permanent magnet
Oxysome 2 can be transferred to the processing of magnetic material factory to obtain by the design requirement.
In the present embodiment, its eccentric place diameter of a circle of extrados 23 of permanent-magnet ferrite 2 is 31.06mm.
3) permanent-magnet ferrite 2 for obtaining design is molded with rotor core 1：See Fig. 4, first by six permanent magnet oxygen
Body 2 is attached on six sides 11 of rotor core 1 piecewise, makes the inner plane 21 of every permanent-magnet ferrite 2 corresponding with rotor core 1
Side 11 fit, and the side plane 24 of adjacent permanent magnet ferrite 2 mutually fits, then by this six Hes of permanent-magnet ferrite 2
One rotor core 1 is put into the mould of injection machine for one, and the internal diameter of its die cavity of mould is matched with the external diameter of rotor to be formed, and
The eccentric extrados of the madial wall of die cavity and adjacent permanent-magnet ferrite is collectively forming (visible six intervals of Fig. 4 of interstitial spaces 231
Space 231), then injection machine makes molten plastic fill six interstitial spaces 231, six respectively toward pressure injection molten plastic in mould
Individual axially extending bore 100 (visible six interstitial spaces of Fig. 6 and six axially extending bores, which are filled, molten plastic), and mould melting
Two transverse planes 22 of material cladding permanent-magnet ferrite 2 and two bottom surfaces 12 (Fig. 6 is not shown) of rotor core 1.
When the internal diameter of its die cavity of mould is matched with the external diameter of rotor to be formed, the madial wall of die cavity with every permanent magnet oxygen
The center (most convex) of its eccentric extrados 23 of body 2 is contradicted.
4) cooling solidify afterwards shaping：See Fig. 8 combination Fig. 7, injection is finished after after the molten plastic cooling and solidifying in die cavity
Be formed as a cage type moulding 3, the cage type moulding 3 is molded as one formula with rotor core 1, permanent-magnet ferrite 2 and turned jointly
Son, wherein, the rotor its outer peripheral edge contour line C1 and each permanent-magnet ferrite 2 eccentric extrados 23 are misaligned.
Cage type moulding 3 is by injection molding manner and rotor core 1 and encloses six permanent magnet oxygen in the periphery of the rotor core 1
Body 2 is integrally formed, and cage type moulding 3 securely houses the permanent-magnet ferrite 2 of rotor core 1 and sheet above number, and Fig. 8 shows one
Individual rotor core 1 and six permanent-magnet ferrites 2 are fixed by this cage type moulding 3, with reference to Fig. 7.
As seen from Figure 5, the circular path C2 (not drawing all) and rotor of circle where its eccentric extrados of permanent-magnet ferrite
Outer peripheral edge contour line C1 (only drawing half) do not overlap.
The present embodiment permanent-magnet ferrite rotor a diameter of 54mm in its outer peripheral edge.
It has 4+ (2 × n) bars side to rotor core 1 in each bottom surface 12 of regular polygon, wherein, n=0~4, n is certainly
So count.
In the present embodiment, rotor core 1 is in positive six prismsby shape, and two bottom surfaces 12 of rotor core 1 are regular hexagon,
Now n=1.
As n=0, rotor core is in four-prism shape；As n=2, rotor core is prismatic in positive eight；As n=3,
Rotor core is prismatic in positive ten；As n=4, rotor core is prismatic in positive 12.
Molten plastic in step c uses non-permeable material, and the present embodiment uses commercially available PBT for raw material.
As seen from Figure 9, the external magnetic field waveform of the hexapole permanent magnet ferrite rotor obtained by the present invention is sinusoidal waveform.
Claims (3)
1. a kind of forming method of permanent-magnet ferrite rotor, it is characterized in that this method is achieved by the steps of：
A, rotor core are designed to regular prism shape, have at rotor core center on axis hole, rotor core and open up evenly and at intervals
Multiple axially extending bores, rotor core is obtained through designing post-processing；
B, permanent magnet selection and design：Using permanent-magnet ferrite, bread shape is designed to, the permanent-magnet ferrite, which has in one, puts down
Face, eccentric extrados, symmetrical two side planes and symmetrical two transverse planes, the piece number of permanent-magnet ferrite with one turn
The number of sub- its side of iron core is equal, the permanent-magnet ferrite of piece number needed for being obtained after design；
The permanent-magnet ferrite and rotor core that c, design are obtained are molded：Above-mentioned permanent-magnet ferrite is first attached to rotor iron piecewise
On each side of core, make the side laminating corresponding with rotor core of the inner plane of every permanent-magnet ferrite, and adjacent permanent magnet
Ferritic side plane mutually fits, and is then put into together in the mould of injection machine, the internal diameter of its die cavity of mould with to be formed turn
The external diameter of son is matched, and the madial wall of die cavity and the eccentric extrados of two or two adjoinings are collectively forming interstitial spaces, then injection machine
Pressure injection molten plastic in toward mould, makes molten plastic fill the interstitial spaces, axially extending bore respectively, and make molten plastic bag
Cover two transverse planes of the permanent-magnet ferrite and two bottom surfaces of rotor core；
D, cooling solidify afterwards shaping：Injection is finished is formed as a cage type injection after the molten plastic in die cavity is cooled and solidified
Part, the cage type moulding is molded as one formula rotor jointly with rotor core, permanent-magnet ferrite, wherein, its outer peripheral edge of the rotor
The eccentric extrados of profile and each permanent-magnet ferrite is misaligned.
2. the forming method of permanent-magnet ferrite rotor according to claim 1, it is characterised in that：The rotor core its be in
Each bottom surface of regular polygon has 4+2n bars side, wherein, n=0~4.
3. the forming method of permanent-magnet ferrite rotor according to claim 1, it is characterised in that：It is molten in the step c
Melt plastics and use non-permeable material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710483174.1A CN107147256A (en) | 2017-06-16 | 2017-06-16 | A kind of forming method of permanent-magnet ferrite rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710483174.1A CN107147256A (en) | 2017-06-16 | 2017-06-16 | A kind of forming method of permanent-magnet ferrite rotor |
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| Publication Number | Publication Date |
|---|---|
| CN107147256A true CN107147256A (en) | 2017-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710483174.1A Pending CN107147256A (en) | 2017-06-16 | 2017-06-16 | A kind of forming method of permanent-magnet ferrite rotor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508398A (en) * | 2017-09-19 | 2017-12-22 | 天津康途科技有限公司 | A kind of rotor |
| EP4063655A4 (en) * | 2019-11-21 | 2022-12-28 | LG Innotek Co., Ltd. | Pump |
| US11742710B2 (en) | 2018-11-29 | 2023-08-29 | Milwaukee Electric Tool Corporation | Rotor assembly for an electric motor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001061244A (en) * | 1999-08-19 | 2001-03-06 | Asmo Co Ltd | Structure of rotor |
| CN201388093Y (en) * | 2009-03-24 | 2010-01-20 | 广东威灵电机制造有限公司 | Permanent magnet rotor for motor |
| CN106253517A (en) * | 2015-06-10 | 2016-12-21 | 日本电产高科电机株式会社 | The manufacture method of rotor, motor and rotor |
-
2017
- 2017-06-16 CN CN201710483174.1A patent/CN107147256A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001061244A (en) * | 1999-08-19 | 2001-03-06 | Asmo Co Ltd | Structure of rotor |
| CN201388093Y (en) * | 2009-03-24 | 2010-01-20 | 广东威灵电机制造有限公司 | Permanent magnet rotor for motor |
| CN106253517A (en) * | 2015-06-10 | 2016-12-21 | 日本电产高科电机株式会社 | The manufacture method of rotor, motor and rotor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107508398A (en) * | 2017-09-19 | 2017-12-22 | 天津康途科技有限公司 | A kind of rotor |
| US11742710B2 (en) | 2018-11-29 | 2023-08-29 | Milwaukee Electric Tool Corporation | Rotor assembly for an electric motor |
| EP4063655A4 (en) * | 2019-11-21 | 2022-12-28 | LG Innotek Co., Ltd. | Pump |
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Application publication date: 20170908 |
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| RJ01 | Rejection of invention patent application after publication |