CN107579612A - Rotor punching, rotor core and motor - Google Patents
Rotor punching, rotor core and motor Download PDFInfo
- Publication number
- CN107579612A CN107579612A CN201710766365.9A CN201710766365A CN107579612A CN 107579612 A CN107579612 A CN 107579612A CN 201710766365 A CN201710766365 A CN 201710766365A CN 107579612 A CN107579612 A CN 107579612A
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- hole
- rotor punching
- rotor
- straight line
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a kind of rotor punching, rotor core and motor, the rotor punching is provided with axis hole and around the circumferentially spaced multiple magnet slot of the axis hole, the a plurality of straight line separated that projection of the rotor punching in basal plane is through the axis hole center is multiple unit portions, each unit portion is provided with a magnet slot, the basal plane is the axially vertical plane with the rotor punching, first through hole that is circumferentially spaced and running through the rotor punching in the axial direction is equipped with each unit portion, second through hole and third through-hole, the first through hole, second through hole and third through-hole are respectively positioned between the outline in the magnet slot and the unit portion, and the first through hole and the third through-hole are distributed in the both sides of the center line of second through hole.According to the rotor punching of the present invention, motor low spatial order low frequency radial load can be reduced while rotor concentricity is ensured, reduce motor low-frequency vibration, lifting motor performance.
Description
Technical field
The present invention relates to technical field of motors, the rotor iron more particularly, to a kind of rotor punching, with the rotor punching
Core and the motor with the rotor core.
Background technology
Motor in correlation technique can not take into account rotor concentricity and motor low spatial order low frequency radial load, motor
Can be poor.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention carries
Go out a kind of rotor punching, the rotor punching can reduce motor low spatial order low frequency while rotor concentricity is ensured
Radial load, reduce motor low-frequency vibration, lifting motor performance.
The present invention also proposes a kind of rotor core with above-mentioned rotor punching.
The present invention also proposes a kind of motor with above-mentioned rotor core.
The rotor punching of embodiment according to a first aspect of the present invention, the rotor punching are provided with axis hole and around described
The circumferentially spaced multiple magnet slots of axis hole, projection of the rotor punching in basal plane are through the more of the axis hole center
Bar straight line separated is multiple unit portions, and each unit portion is provided with a magnet slot, and the basal plane is and described turn
The axially vertical plane of sub- punching, each it is equipped with circumferentially spaced in the unit portion and runs through described in the axial direction
The first through hole of rotor punching, the second through hole and third through-hole, the first through hole, the second through hole and third through-hole are respectively positioned on institute
Between the outline for stating magnet slot and the unit portion, and the first through hole and the third through-hole are distributed in described second and led to
The both sides of the center line in hole.
Rotor punching according to embodiments of the present invention, by setting first through hole, the second through hole and third through-hole, it can protect
While demonstrate,proving rotor concentricity, motor low spatial order low frequency radial load is reduced, reduces motor low-frequency vibration, lifting motor
Can, and manufacturing process is simple.
In addition, rotor punching according to embodiments of the present invention, can also have following additional technical feature：
According to one embodiment of present invention, the center line of second through hole and the center line of the magnet slot overlap,
And the first through hole and the third through-hole are symmetrically distributed in the both sides of the center line of second through hole.
Alternatively, the projection of the first through hole and the third through-hole in the basal plane include first straight line section,
Second straight line section and the 3rd straightway between the first straight line section and the second straight line section, the first straight line
The extended line of section and the 3rd straightway intersects at the first intersection point, the extension of the second straight line section and the 3rd straightway
Line intersects at the second intersection point, the straight line at the center of excessively described first intersection point and the axis hole and the center line of second through hole it
Between angle α, excessively described second intersection point and the axis hole the straight line at center and the center line of second through hole between folder
Meet following relational expression between the central angle γ in angle beta and the unit portion：α/2≤β≤α/2+1, and γ/2-1≤2* α≤
γ/2+1。
Alternatively, the projection of the first through hole and the third through-hole in the basal plane also includes located at described the
Between one straightway and the second straight line section and fourth straightway parallel with the 3rd straightway.
Alternatively, the first straight line section is connected with the 3rd straightway by the first arc section；And/or described second
Straightway is connected with the 3rd straightway by the second arc section.
According to one embodiment of present invention, second through hole is projected as rectangle in the basal plane.
Alternatively, the apex rounding angle of second through hole.
According to one embodiment of present invention, the outline in each unit portion includes two off-centre operation segmental arcs and set
Concentric circles segmental arc between two off-centre operation segmental arcs, the center of circle of the concentric circles segmental arc and the center of circle weight of the axis hole
Close, the center of circle of the axis hole is deviateed in the center of circle of the off-centre operation segmental arc.
The rotor core of embodiment according to a second aspect of the present invention, including according to the above-mentioned first aspect embodiment of the present invention
Rotor punching.
Rotor core according to embodiments of the present invention, by setting the rotor according to the above-mentioned first aspect embodiment of the present invention
Punching so that rotor core with above-mentioned rotor punching with all advantages, you can while rotor concentricity is ensured,
Motor low spatial order low frequency radial load is reduced, reduces motor low-frequency vibration, lifting motor performance, and manufacturing process is simple.
The motor of embodiment according to a third aspect of the present invention, including the rotor according to the above-mentioned second aspect embodiment of the present invention
Iron core.
Motor according to embodiments of the present invention, by setting the rotor iron according to the above-mentioned second aspect embodiment of the present invention
Core so that motor with above-mentioned rotor core with all advantages, you can while rotor concentricity is ensured, reduce electricity
Machine low spatial order low frequency radial load, motor low-frequency vibration, lifting motor performance are reduced, and manufacturing process is simple.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Substantially and it is readily appreciated that, wherein：
Fig. 1 is the structural representation of rotor punching according to embodiments of the present invention；
Fig. 2 is the structural representation in a unit portion of the rotor punching shown in Fig. 1；
Fig. 3 is the structural representation of the first through hole in the unit portion shown in Fig. 2；
Fig. 4 is that circle shows the enlarged drawing of structure at A in Fig. 3；
Fig. 5 is the magnetic pole layout viewing of rotor punching according to embodiments of the present invention；
Fig. 6 is the structural representation of rotor punching of the prior art.
Reference：
Rotor punching 100；
Axis hole 1；
Magnet slot 2；
First through hole 3；First straight line section 31；Second straight line section 32；3rd straightway 33；4th straightway 34；First circle
Segmental arc 35；Second arc section 36；First intersection point 37；Second intersection point 38；
Second through hole 4；The center line 41 of second through hole 4；
Third through-hole 5；
Unit portion 6；Concentric circles segmental arc 61；Off-centre operation segmental arc 62.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the invention, it is to be understood that the orientation of instruction such as term " axial direction ", " radial direction ", " circumference " or
Position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of the description present invention and simplifies description, without
It is instruction or implies that signified device or element there must be specific orientation, with specific azimuth configuration and operation, therefore not
It is understood that as limitation of the present invention.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected by intermediary, Ke Yishi
The connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can be with
The concrete meaning of above-mentioned term in the present invention is understood as the case may be.
The application is made based on discovery of the applicant to following facts and problem and understanding：
Rotor in correlation technique typically uses cantilever design, only unilateral bearing, therefore in rotor installation process, needs
It could be adjusted to control its air gap by frocks such as clearance gauges, this, which crosses range request stator inner headed face and rotor outer circle face, to be
Large-scale isocentric circular arc could position well to isocentric circular arc.Therefore rotor core external arc there must be larger across angle
Isocentric circular arc so that rotor optimization difficulty increase, it is difficult to which the low spatial order low frequency component in reducing the radial load of motor, is caused
Motor oscillating is big.
In order to solve the above problems, typically the following two kinds method is used：(1) rotor outer circle arc is designed to eccentric structure,
Although this can facilitate rotor to optimize, the low spatial order low frequency component in the radial load of motor, its rotor outer circle face are reduced
It is point and the corresponding relation in face, the bad control of air gap precision between stator inner headed face；(2) rotor outer circle arc by isocentric circular arc and
Two eccentric arcs located at isocentric circular arc both ends form, and rotor outer circle face and stator inner headed face are aspectant counter structure,
It can be very good to control air gap precision, but the radial load of low spatial order low frequency component is larger.It follows that in correlation technique
Motor can not take into account rotor concentricity and motor low spatial order low frequency radial load, motor performance is poor.
Therefore, the application proposes a kind of rotor punching 100, the rotor punching 100 can ensure rotor concentricity
Under the premise of, the low spatial order low frequency radial load of motor is reduced, reduces the low-frequency vibration of motor, lifting motor performance, and manufacture
Technique is simple.
The rotor punching 100 of embodiment according to a first aspect of the present invention is described below with reference to Fig. 1-Fig. 5.
As Figure 1-Figure 5, rotor punching 100 according to embodiments of the present invention is provided with axis hole 1 and around axis hole 1
Circumferentially spaced multiple magnet slots 2, projection of the rotor punching 100 in basal plane are through a plurality of straight line at the center of axis hole 1
It is divided into multiple unit portions 6, each unit portion 6 is provided with a magnet slot 2, and basal plane is axially vertical with rotor punching 100
Plane, be equipped with each unit portion 6 first through hole 3 that is circumferentially spaced and running through rotor punching 100 in the axial direction,
Second through hole 4 and third through-hole 5, first through hole 3, the second through hole 4 and third through-hole 5 are respectively positioned on the outer of magnet slot 2 and unit portion 6
Between profile, and first through hole 3 and third through-hole 5 are distributed in the both sides of the center line 41 of the second through hole 4.
It should be noted that " multiple " are meant that two or more, for example, can be two, three, four or
More.Such as in the specific example shown in Fig. 1, the number of magnet slot 2 is eight, crossing four straight lines at the center of axis hole 1 will turn
Projection of the sub- punching 100 in basal plane is divided into eight unit portions 6, and each unit portion 6 is provided with a magnet slot 2.
Rotor punching 100 according to embodiments of the present invention, by being set between the outline in magnet slot 2 and unit portion 6
First through hole 3, the second through hole 4 and third through-hole 5, motor can be substantially reduced radially on the premise of rotor concentricity is ensured
The minimum order in space and the harmonic of time 2 of power and the space fundamental wave order and the harmonic of time 2 of motor radial load, drop
The low-frequency vibration of low motor, lifting motor performance, and manufacturing process is simple.
In one embodiment of the invention, as shown in Fig. 1-Fig. 2, the center line 41 of the second through hole 4 and magnet slot 2
Center line overlaps, and first through hole 3 and third through-hole 5 are symmetrically distributed in the both sides of the center line 41 of the second through hole 4.I.e. first is logical
Hole 3 and the shape of third through-hole 5 are identical and equal sized, and the center line of first through hole 3 and third through-hole 5 on the second through hole 4
41 is symmetrical.It is possible thereby to further reduce the minimum order in space of motor radial load and the harmonic of time 2 and motor radially
The space fundamental wave order and the harmonic of time 2 of power, reduce the low-frequency vibration of motor, lifting motor performance, and can be preferably
Ensure rotor concentricity.
Preferably, as shown in Fig. 2-Fig. 4, it is straight that the projection of first through hole 3 and third through-hole 5 in basal plane includes first
Line segment 31, second straight line section 32 and the 3rd straightway 33 between first straight line section 31 and second straight line section 32, first
The extended line of the straightway 33 of straightway 31 and the 3rd intersects at the first intersection point 37, and the straightway 33 of second straight line section 32 and the 3rd prolongs
Long line intersects at the second intersection point 38, crosses between the first intersection point 37 and the straight line at center and the center line 41 of the second through hole 4 of axis hole 1
Angle α, the angle β and list that cross between the straight line at center and the center line 41 of the second through hole 4 of the second intersection point 38 and axis hole 1
Meet following relational expression between the central angle γ in first portion 6：α/2≤β≤α/2+1, and γ/2-1≤2* α≤γ/2+1.Thus may be used
While rotor concentricity is ensured, further reduce motor radial load the minimum order in space and the harmonic of time 2 with
And the space fundamental wave order and the harmonic of time 2 of motor radial load, reduce the low-frequency vibration of motor, lifting motor performance.
Further, as shown in Figure 3, the projection of first through hole 3 and third through-hole 5 in basal plane also includes located at the
Between one straightway 31 and second straight line section 32 and fourth straightway 34 parallel with the 3rd straightway 33.
Alternatively, as shown in Fig. 3-Fig. 4, the straightway 33 of first straight line section 31 and the 3rd passes through the phase of the first arc section 35
Even；And/or second straight line section 32 is connected with the 3rd straightway 33 by the second arc section 36.Thus processing and manufacturing is facilitated.
In one embodiment of the invention, as depicted in figs. 1 and 2, the second through hole 4 is projected as rectangle in basal plane.
It is possible thereby to further reduce the minimum order in space of motor radial load and the space of the harmonic of time 2 and motor radial load
Fundamental wave order and the harmonic of time 2, the low-frequency vibration of motor, lifting motor performance are reduced, and fixed turn can be better ensured that
Sub- concentricity.
Alternatively, as depicted in figs. 1 and 2, the apex rounding angle of the second through hole 4.Thus processing and manufacturing is facilitated.
In one embodiment of the invention, as shown in fig. 1, the outline in each unit portion 6 includes two bias
Arc section 62 and the concentric circles segmental arc 61 between two off-centre operation segmental arcs 62, the center of circle of concentric circles segmental arc 61 and axis hole 1
The center of circle is overlapped, and the center of circle of axis hole 1 is deviateed in the center of circle of off-centre operation segmental arc 62.Preferably, concentric circles segmental arc 61 and two eccentric arcs
Section 62 is tangent connection.It is possible thereby to the concentricity between better ensuring that rotor, reduces air gap harmonic wave, the vibration of motor
It is smaller with noise, the performance of further lifting motor.
Motor of the present applicant to the rotor punching 100 in above-mentioned Fig. 1-Fig. 5 example showns provided with the present invention
With the frequency multiplication radial load Bomi degree of 4 rank time of space 2 of the motor provided with the rotor punching of the prior art 100 shown in Fig. 6
And the frequency multiplication radial load Bomi degree of 8 rank time of space 2 is calculated respectively, is drawn：
It should be noted that the motor calculated in above table is the groove motor of 8 pole 12, the minimum order in space is 4 ranks, empty
Between fundamental wave order be 8 ranks.
By above table, can be apparent from：Relative to motor of the prior art, the rotor provided with the embodiment of the present invention
The minimum order in space and space fundamental wave order radial load of the motor of punching 100 substantially reduce, and thus the low order low frequency of motor shakes
It is dynamic to substantially reduce.
The rotor core of embodiment according to a second aspect of the present invention, including according to the above-mentioned first aspect embodiment of the present invention
Rotor punching 100.Specifically, rotor core is formed by multiple above-mentioned rotor punchings 100 are stacked, and rotor core also includes multiple
Permanent magnet, multiple permanent magnets are located in multiple magnet slots 2 correspondingly.
Rotor core according to embodiments of the present invention, by setting the rotor according to the above-mentioned first aspect embodiment of the present invention
Punching 100 so that rotor core with above-mentioned rotor punching 100 with all advantages, you can ensure rotor concentricity
While, motor low spatial order low frequency radial load, lifting motor performance are reduced, and manufacturing process is simple.
The motor of embodiment according to a third aspect of the present invention, including the rotor according to the above-mentioned second aspect embodiment of the present invention
Iron core.
Motor according to embodiments of the present invention, by setting the rotor iron according to the above-mentioned second aspect embodiment of the present invention
Core so that motor with above-mentioned rotor core with all advantages, you can while rotor concentricity is ensured, reduce electricity
Machine low spatial order low frequency radial load, lifting motor performance, and manufacturing process is simple.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means to combine specific features, the knot that the embodiment or example describe
Structure, material or feature are contained at least one embodiment or example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can combine in an appropriate manner in any one or more embodiments or example.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that：Not
In the case of departing from the principle and objective of the present invention a variety of change, modification, replacement and modification can be carried out to these embodiments, this
The scope of invention is limited by claim and its equivalent.
Claims (10)
1. a kind of rotor punching, it is characterised in that the rotor punching is provided with axis hole and circumferentially-spaced around the axis hole
The multiple magnet slots set, a plurality of straight line separated that projection of the rotor punching in basal plane is through the axis hole center are
Multiple unit portions, each unit portion are provided with a magnet slot, and the basal plane is the axial direction with the rotor punching
Vertical plane, circumferentially spaced and running through the rotor punching in the axial direction the is equipped with each unit portion
One through hole, the second through hole and third through-hole, the first through hole, the second through hole and third through-hole are respectively positioned on the magnet slot and institute
Between the outline for stating unit portion, and the first through hole and the third through-hole are distributed in the center line of second through hole
Both sides.
2. rotor punching according to claim 1, it is characterised in that the center line of second through hole and the magnet slot
Center line overlap, and the first through hole and the third through-hole are symmetrically distributed in the two of the center line of second through hole
Side.
3. rotor punching according to claim 2, it is characterised in that the first through hole and the third through-hole are described
Projection in basal plane includes first straight line section, second straight line section and located at the first straight line section and the second straight line section
Between the 3rd straightway, the extended line of the first straight line section and the 3rd straightway intersects at the first intersection point, described
The extended line of two straightways and the 3rd straightway intersects at the center of the second intersection point, excessively described first intersection point and the axis hole
Straight line and second through hole center line between angle α, excessively described second intersection point and the axis hole center straight line
Angle β between the center line of second through hole and meet following relational expression between the central angle γ in the unit portion：
α/2≤β≤α/2+1, and γ/2-1≤2* α≤γ/2+1.
4. rotor punching according to claim 3, it is characterised in that the first through hole and the third through-hole are described
Projection in basal plane also include being located between the first straight line section and the second straight line section and with the 3rd straightway
The 4th parallel straightway.
5. rotor punching according to claim 3, it is characterised in that the first straight line section and the 3rd straightway lead to
The first arc section is crossed to be connected；And/or
The second straight line section is connected with the 3rd straightway by the second arc section.
6. rotor punching according to claim 1, it is characterised in that second through hole is projected as in the basal plane
Rectangle.
7. rotor punching according to claim 6, it is characterised in that the apex rounding angle of second through hole.
8. according to the rotor punching any one of claim 1-7, it is characterised in that the outline in each unit portion
Include two off-centre operation segmental arcs and the concentric circles segmental arc between two off-centre operation segmental arcs, the concentric circles segmental arc
The center of circle and the center of circle of the axis hole are overlapped, and the center of circle of the axis hole is deviateed in the center of circle of the off-centre operation segmental arc.
9. a kind of rotor core, it is characterised in that including the rotor punching according to any one of claim 1-8.
10. a kind of motor, it is characterised in that including according to the rotor core described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766365.9A CN107579612B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710766365.9A CN107579612B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core and motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107579612A true CN107579612A (en) | 2018-01-12 |
| CN107579612B CN107579612B (en) | 2020-01-03 |
Family
ID=61030173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710766365.9A Active CN107579612B (en) | 2017-08-30 | 2017-08-30 | Rotor punching sheet, rotor core and motor |
Country Status (1)
| Country | Link |
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| CN (1) | CN107579612B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
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| DE19851883A1 (en) * | 1998-11-10 | 2000-05-18 | Siemens Ag | Permanent magnet polyphase-machine especially synchronous machine |
| JP2004350345A (en) * | 2003-05-20 | 2004-12-09 | Matsushita Electric Ind Co Ltd | Permanent magnetic motor |
| US20050225192A1 (en) * | 2004-04-08 | 2005-10-13 | Minebea Co., Ltd. | Rotor arrangement for an electric machine |
| EP2026445A2 (en) * | 2007-08-17 | 2009-02-18 | Continental Automotive GmbH | Synchronous machine with reduced cogging torque |
| CN102171909A (en) * | 2008-11-19 | 2011-08-31 | 三菱电机株式会社 | Rotor of motor and motor and fan and compressor |
| CN205986394U (en) * | 2016-09-05 | 2017-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent -magnet machine and compressor |
| CN106655681A (en) * | 2015-10-29 | 2017-05-10 | 富士通将军股份有限公司 | Rotor and permanent magnet electric motor |
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2017
- 2017-08-30 CN CN201710766365.9A patent/CN107579612B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19851883A1 (en) * | 1998-11-10 | 2000-05-18 | Siemens Ag | Permanent magnet polyphase-machine especially synchronous machine |
| JP2004350345A (en) * | 2003-05-20 | 2004-12-09 | Matsushita Electric Ind Co Ltd | Permanent magnetic motor |
| US20050225192A1 (en) * | 2004-04-08 | 2005-10-13 | Minebea Co., Ltd. | Rotor arrangement for an electric machine |
| EP2026445A2 (en) * | 2007-08-17 | 2009-02-18 | Continental Automotive GmbH | Synchronous machine with reduced cogging torque |
| CN102171909A (en) * | 2008-11-19 | 2011-08-31 | 三菱电机株式会社 | Rotor of motor and motor and fan and compressor |
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| CN108512320A (en) * | 2018-05-30 | 2018-09-07 | 广东威灵电机制造有限公司 | Stator core and electric rotating machine |
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| Publication number | Publication date |
|---|---|
| CN107579612B (en) | 2020-01-03 |
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