CN109474096A - A kind of servo motor of embedded spoke type p-m rotor - Google Patents
A kind of servo motor of embedded spoke type p-m rotor Download PDFInfo
- Publication number
- CN109474096A CN109474096A CN201811594807.7A CN201811594807A CN109474096A CN 109474096 A CN109474096 A CN 109474096A CN 201811594807 A CN201811594807 A CN 201811594807A CN 109474096 A CN109474096 A CN 109474096A
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- rotor
- permanent magnet
- spoke type
- motor
- servo motor
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- 230000005389 magnetism Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 210000000527 greater trochanter Anatomy 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 17
- 230000004907 flux Effects 0.000 description 14
- 230000005415 magnetization Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
-
- 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 servo motor of embedded spoke type p-m rotor, rotor-side embeds spoke type permanent magnet, the polyhedron being made of surface, the bottom surface opposite with surface, left side, right side and two end faces.The left and right side is symmetrical, and left side and right side are the warpage face that multiple planes are constituted, and the broken line on warpage face is parallel with shaft.The present invention, rotor-side permanent magnetism body side surface is that warpage face improves rotor side pole embrace compared with rectangular configuration rotor-side permanent magnet, so that the reluctance torque of motor is more improved, to improve the torque density and overload capacity of motor.In addition permanent magnet dosage is reduced, further reduced motor manufacturing cost.In Small And Medium Capacity servo motor field, there is more greater trochanter core area close to shaft side, convenient for rotor core close to shaft side every bore slot flexible setting.
Description
Technical field
The present invention relates to a kind of permanent-magnet servo motor, the servo motor of specifically a kind of embedded spoke type p-m rotor.
Background technique
Permanent magnet motor structure is flexible, power density and power factor with higher, is widely used to various different rule
The product servo of lattice.Durface mounted permanent magnet (Surface-mounted Permanent Magnet, SPM) motor, not only structure letter
It is single, it is easy to mass production, and torque ripple is small, is easy to realize it control.In permanent magnet surfaces, often to use
Stainless steel sleeve pipe or high strength fibre, air gap is relatively large between rotor.In order to which the torque for further increasing motor is close
Degree and overload capacity, international some advanced product servos start to gradually adopt built-in permanent magnetic (Interior Permanent
Magnet, IPM) design of electrical motor scheme.Not only air gap is relatively small for such motor, but also has reluctance torque, has higher
Torque density and constant power speed range.As parallel magnetic circuit canonical topology, two adjacent magnetic pole permanent magnets of spoke type rotor
Parallel connection provides every pole magnetic flux, and permanent magnet utilization rate is higher.
Chinese magneto scholar Tang Renyuan academician systematically discussed embedded tangential ipm motor in 1997, which turns
Sub- permanent magnet is rectangular configuration in two-dimensional space (three-dimensional space is cuboid), it is indicated that one pole span of motor of this kind of topological structure
Under magnetic flux provided by two neighboring magnetic pole parallel, can get biggish every pole magnetic flux.When motor pole number is more, due to having two
A permanent magnetism body section provides every pole magnetic flux to air gap, and spoke type ipm motor can further improve air gap flux density, to provide enough
Every pole magnetic flux.Especially spoke type ipm motor reluctance torque with higher, the accounting in total electromagnetic torque are even high
Up to 40%, be conducive to improve motor overload ability and power density, and the constant power speed range of motor can be further expanded.So
And such topology have biggish leakage field ratio, therefore design when need to carry out it is necessary every magnetic be arranged.
In servo motor field, rotor-side mainstay scheme is still SPM scheme at present.But has Japan in recent years
Servo motor enterprise gradually releases spoke type ipm motor product, and stator side uses 12 slot fractional-slot concentratred winding closed slots
Tooth yoke separate design scheme, rotor-side use five pairs of spoke type p-m rotors, and close to shaft side setting pentagon every bore,
Permanent magnet is rectangle in the two-dimensional section of rotor.Compared with same specification product, air gap phase between this kind of product stator and rotor
To smaller, motor axial length is relatively small, and by the reluctance torque of output motor, the overload capacity of motor is further mentioned
It rises, torque density with higher and significant competitiveness in similar product.However, due to the utilization of rectangular permanent magnet, relatively
The pole embrace of motor is reduced, thus the rotor can also further improve, to improve the torque density of motor.
Summary of the invention
It is an object of the present invention to overcome defect of the existing technology, a kind of embedded spoke type p-m rotor is proposed
Servo motor, be the spoke type permanent magnetism that spoke type rectangular permanent magnet is changed to that cross section is polygon by existing rotor lateral section
Body relatively increases the pole embrace of motor, so that the torque density of motor is improved.
The present invention embeds the servo motor of spoke type p-m rotor, including stator, rotor and shaft, the rotor are sleeved on
In shaft, the rotor embeds spoke type rotor-side permanent magnet.The rotor-side permanent magnet be by close to air gap side surface, with
The polyhedron that the opposite bottom surface in surface (close to shaft), left side, right side and two end faces are constituted, surface is parallel with bottom surface,
Two end faces are parallel to each other.It is characterized in that: the left side and right side are symmetrical, left side and right side are multiple flat
The warpage face that face is constituted, the broken line on warpage face are parallel with shaft.
Preferred embodiment first is that: the left side and right side of rotor side permanent magnet are that two planes are constituted
The cross section (face vertical with shaft) in warpage face, rotor side permanent magnet is hexagonal.
Preferred embodiment second is that: the left side and right side of rotor side permanent magnet are that three planes are constituted
Warpage face, the cross section of rotor side permanent magnet are in octagon.
Preferred embodiment third is that: the left side and right side of rotor side permanent magnet are that four planes are constituted
The cross section in warpage face, rotor side permanent magnet is octagonal.
Technical solution of the present invention, the left side and right side of rotor side permanent magnet may each be more planes
The warpage face of composition.
The present invention embeds the servo motor of spoke type p-m rotor, and rotor-side permanent magnetism body side surface is warpage face, with rectangle knot
Structure rotor-side permanent magnet is compared, and rotor side pole embrace is improved, so that the reluctance torque of motor is more improved, from
And improve the torque density and overload capacity of motor.In addition reduce permanent magnet dosage, thus further decrease motor manufacturing at
This, and limited rare earth resources are utilized to greatest extent, and reduce environmental pollution and its restoration and protection cost to a certain extent.In
Low capacity servo motor field has more greater trochanter core area close to shaft side, convenient for rotor core close to shaft side every magnetic
The setting in hole.
Detailed description of the invention
Fig. 1 is the servo motor sectional schematic diagram of the embedded spoke type p-m rotor of the present invention.
Fig. 2 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as hexagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1<a 2,b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing the throwing of representative plane width
Shadow.
Fig. 3 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as hexagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1>a 2,b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing the throwing of representative plane width
Shadow.
Fig. 4 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as hexagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1 = a 2,b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing the throwing of representative plane width
Shadow.
Fig. 5 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as octagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1<a 2,a 3 =(a 1+a 2),b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing representative
The projection of plane width.
Fig. 6 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as octagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1>a 2,a 3 =(a 1+a 2),b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing representative
The projection of plane width.
Fig. 7 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as octagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1= a 2,a 3 =(a 1+a 2),b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1Witha 2Only position instruction is not representing representative
The projection of plane width.
Fig. 8 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as decagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1=a 2=a 3=a 4,b 1 = b 2), b figure is rotor cross-section diagram.In figurea 1、a 2、a 3、a 4It is wide to be not representing representative plane for only position instruction
The projection of degree.
Fig. 9 is servo motor rotor and the signal of rotor-side magnet structure of the embedded spoke type p-m rotor of the present invention
Figure, the cross section of rotor side permanent magnet is rendered as dodecagon.Wherein, a figure be rotor-side permanent magnet cross-section diagram (a 1=a 2=a 3=a 4,a 5=a 1+a 2+a 3+a 4), b figure is rotor cross-section diagram.In figurea 1、a 2、a 3、a 4Only position instruction is not representing institute's generation
The projection of the plane width of table.
Specific embodiment
Below with reference to embodiment and attached drawing, invention is further described in detail.
As shown in Figure 1, the present invention embeds the servo motor of spoke type p-m rotor, including stator, rotor and shaft, it is described
Rotor is sleeved in shaft.Stator side uses 12 slot fractional-slot concentratred winding design schemes, and rotor-side uses 5 pairs of spoke type permanent magnetism
Rotor.The rotor-side permanent magnet is by surface, the bottom surface opposite with surface (close to shaft), left side, right side and two
The polyhedron that end face is constituted, surface is parallel with bottom surface, and two end faces are parallel to each other.In figure, 3 be stator core, 4 for armature around
Group.
Embodiment 1:
It is spoke type ipm motor rotor-side permanent magnet 1, the permanent magnet left and right side as shown in Fig. 2 (a), Fig. 3 (a), Fig. 4 (a)
Be made of two planes warpage face (m=2), the broken line in warpage face is parallel with shaft 5, and the permanent magnet cross section is hexagonal.Two
The width dimensions of plane are respectivelya 1Witha 2, meeta 1<a 2Ora 1>a 2Ora 1=a 2.The permanent magnet surfaces width isb 2, bottom surface
Width isb 1, meetb 1<b 2Orb 1>b 2Orb 1=b 2.Therefore, topological selection schemenMeet relationshipn=3 m , in formulam=2(is constituted
The quantity of the plane in warpage face), therefore share 9 kinds of topological selection schemes.
It is spoke type ipm motor rotor core 2,2 providing holes of rotor core as shown in Fig. 2 (b), Fig. 3 (b), Fig. 4 (b)
Slot is uniformly distributed along rotor surface is radial, and shape is adapted to magnet structure, for placing the different direction of magnetizations
Permanent magnet.The part of close rotor surface is the main magnetic flux path of permanent magnet between two hole slots, and is leaned between two hole slots
The part of nearly shaft is mainly inoperative magnetic flux path, and area is further widened, and can add necessary setting every magnetic as needed
It sets.
Embodiment 2:
It is spoke type ipm motor rotor-side permanent magnet 1, the permanent magnet left and right side as shown in Fig. 5 (a), Fig. 6 (a), Fig. 7 (a)
Be made of three planes warpage face (m=3), the broken line in warpage face is parallel with shaft 5, which is in octagon.Warpage
Face is by the plane width of shaft sidea 1, it is close to the plane width of air gap sidea 2, meeta 1<a 2Ora 1>a 2Ora 1=a 2, also
It needs to meeta 3< (a 1+a 2) ora 3=(a 1+a 2) ora 3> (a 1+a 2).The permanent magnet surfaces width isb 2, bottom width isb 1, full
Footb 1<b 2Orb 1>b 2Orb 1=b 2.Therefore, topological selection schemenMeet relationshipn=3 m , in formulam=3, therefore share 27 kinds and open up
Flutter selection scheme.
It is spoke type ipm motor rotor core 2 as shown in Fig. 5 (b), Fig. 6 (b), Fig. 7 (b), hole slot is arranged in rotor core,
It is uniformly distributed along rotor surface is radial, and shape is adapted to magnet structure, for placing the different direction of magnetizations
Permanent magnet.The part of close rotor surface is the main magnetic flux path of permanent magnet between two hole slots, and close between two hole slots
The part of shaft is mainly inoperative magnetic flux path, and area is further widened, and can be added as needed necessary every magnetic setting.
Embodiment 3:
It as shown in Figure 8 (a), is spoke type ipm motor rotor-side permanent magnet 1, which is made of four planes
Warpage face (m=4), the broken line in warpage face is parallel with shaft 5, and the permanent magnet cross section is octagonal.Warpage face is by the flat of shaft side
Face width isa 1, the width of plane adjacent thereto isa 3, meeta 1<a 3Ora 1=a 3Ora 1>a 3, warpage face is close to air gap side
Plane width bea 2, the width of plane adjacent thereto isa 4, meeta 2<a 4Ora 2=a 4Ora 2>a 4, also need to meet (a 1+a 3) < (a 2+a 4) or (a 1+a 3)=(a 2+a 4) or (a 1+a 3) > (a 2+a 4).The permanent magnet surfaces width isb 2, bottom width isb 1, meetb 1<b 2Orb 1=b 2Orb 1>b 2.Therefore, topological selection schemenMeet relationshipn=3 m , in formulam=4, therefore share 81
The topological selection scheme of kind.
It as shown in Figure 8 (b), is spoke type ipm motor rotor core 2, rotor core is arranged hole slot, is in along rotor surface
It is radial to be uniformly distributed, and shape is adapted to magnet structure, for placing the permanent magnet of the different direction of magnetizations.Two hole slots
Between close to the part of rotor surface be the main magnetic flux path of permanent magnet, and be mainly close to the part of shaft between two hole slots
Inoperative magnetic flux path, area are further widened, and can be added as needed necessary every magnetic setting.
Embodiment 4:
It as shown in Fig. 9 (a), is spoke type ipm motor rotor-side permanent magnet 1, which is made of five planes
Warpage face (m=5), the broken line in warpage face is parallel with shaft 5, which is in dodecagon.Warpage face is by shaft side
Plane width isa 1, plane width adjacent thereto isa 3, meeta 1<a 3Ora 1=a 3Ora 1>a 3, warpage face is close to air gap side
Plane width bea 2, plane width adjacent thereto isa 4, meeta 2<a 4Ora 2=a 4Ora 2>a 4, also need to meet (a 1+a 3)
< (a 2+a 4) or (a 1+a 3)=(a 2+a 4) or (a 1+a 3) > (a 2+a 4), the plane width among warpage face isa 5, meeta 5<
(a 1+a 2+a 3+a 4) ora 5=(a 1+a 2+a 3+a 4) ora 5> (a 1+a 2+a 3+a 4).The permanent magnet surfaces width isb 2, bottom width
Forb 1, meetb 1<b 2Orb 1=b 2Orb 1>b 2.Therefore, topological selection schemenMeet relationshipn=3 m , in formulam=5, thus it is shared
243 kinds of topological selection schemes.
It as shown in Figure 9 (b), is spoke type ipm motor rotor core 2, rotor core is arranged hole slot, is in along rotor surface
It is radial to be uniformly distributed, and shape is adapted to magnet structure, for placing the permanent magnet of the different direction of magnetizations.Two hole slots
Between close to the part of rotor surface be the main magnetic flux path of permanent magnet, and be mainly close to the part of shaft between two hole slots
Inoperative magnetic flux path, area are further widened, and can be added as needed necessary every magnetic setting.
Spoke type permanent-magnet structure topology design scheme described in above-described embodiment can be applied not only to rotation internal rotor permanent-magnetic
It in motor, can also be applied in outer-rotor permanent magnet motor, apply also in linear motor.Belong to the protection that the present invention limits
Range.
Claims (5)
1. a kind of servo motor of embedded spoke type p-m rotor, including stator, rotor and shaft, the rotor are sleeved on shaft
On, the rotor embeds spoke type permanent magnet；The rotor-side permanent magnet is by close to air gap side surface, the bottom opposite with surface
The polyhedron prism that face, left side, right side and two end faces are constituted, surface is parallel with bottom surface, and two end faces are parallel to each other；Its
Be characterized in: the left side and right side are symmetrical, and left side and right side are the warpage face that multiple planes are constituted, warpage
Broken line on face is parallel with shaft.
2. the servo motor of a kind of embedded spoke type p-m rotor according to claim 1, it is characterized in that: the motor turns
The left side and right side of sub- side permanent magnet are the warpage face that two planes are constituted, and the cross section of rotor side permanent magnet is in
Hexagon.
3. the servo motor of a kind of embedded spoke type p-m rotor according to claim 1, it is characterized in that: the motor turns
The left side and right side of sub- side permanent magnet are the warpage face that three planes are constituted, and the cross section of rotor side permanent magnet is in
Octagon.
4. the servo motor of a kind of embedded spoke type p-m rotor according to claim 1, it is characterized in that: the motor turns
The left side and right side of sub- side permanent magnet are the warpage face that four planes are constituted, and the cross section of rotor side permanent magnet is in
Decagon.
5. the servo motor of a kind of embedded spoke type p-m rotor according to claim 1, it is characterized in that: the rotor is
Internal rotor or outer rotor.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594807.7A CN109474096A (en) | 2018-12-25 | 2018-12-25 | A kind of servo motor of embedded spoke type p-m rotor |
| PCT/CN2019/086695 WO2020133874A1 (en) | 2018-12-25 | 2019-05-13 | Servo motor having interior spoke-type permanent magnet rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811594807.7A CN109474096A (en) | 2018-12-25 | 2018-12-25 | A kind of servo motor of embedded spoke type p-m rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109474096A true CN109474096A (en) | 2019-03-15 |
Family
ID=65677942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811594807.7A Pending CN109474096A (en) | 2018-12-25 | 2018-12-25 | A kind of servo motor of embedded spoke type p-m rotor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109474096A (en) |
| WO (1) | WO2020133874A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114039435A (en) * | 2021-11-04 | 2022-02-11 | 广东美芝精密制造有限公司 | Rotor structure, motor structure, compressor structure and refrigeration plant |
| TWI771037B (en) * | 2021-06-04 | 2022-07-11 | 士林電機廠股份有限公司 | Motor magnet fixing structure |
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| CN201194346Y (en) * | 2008-04-09 | 2009-02-11 | 上海电机学院 | Tangential magnetic steel permanent magnet motor |
| US9287742B2 (en) * | 2013-08-05 | 2016-03-15 | General Electric Company | Spoke permanent magnet machine with reduced torque ripple and method of manufacturing thereof |
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- 2019-05-13 WO PCT/CN2019/086695 patent/WO2020133874A1/en active Application Filing
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|---|---|---|---|---|
| JP2010213457A (en) * | 2009-03-10 | 2010-09-24 | Denso Corp | Embedded magnet type motor |
| CN103891105A (en) * | 2011-10-27 | 2014-06-25 | 法雷奥电机设备公司 | Rotor for a rotating electric machine and rotating electrical machine comprising a rotor |
| CN105191087A (en) * | 2013-06-05 | 2015-12-23 | 法雷奥电机设备公司 | Synchronous electric motor with permanent magnets |
| CN104702009A (en) * | 2013-12-09 | 2015-06-10 | Lg伊诺特有限公司 | Rotor and motor including the same |
| CN106464050A (en) * | 2014-06-05 | 2017-02-22 | 法雷奥电机设备公司 | Flux-concentrating rotor with permanent magnets for rotary electric machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI771037B (en) * | 2021-06-04 | 2022-07-11 | 士林電機廠股份有限公司 | Motor magnet fixing structure |
| CN114039435A (en) * | 2021-11-04 | 2022-02-11 | 广东美芝精密制造有限公司 | Rotor structure, motor structure, compressor structure and refrigeration plant |
| CN114039435B (en) * | 2021-11-04 | 2023-10-03 | 广东美芝精密制造有限公司 | Rotor structure, motor structure, compressor structure and refrigeration equipment |
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|---|---|
| WO2020133874A1 (en) | 2020-07-02 |
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