CN206471938U - A kind of step skewed pole rotor and its motor - Google Patents
A kind of step skewed pole rotor and its motor Download PDFInfo
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- CN206471938U CN206471938U CN201620643714.9U CN201620643714U CN206471938U CN 206471938 U CN206471938 U CN 206471938U CN 201620643714 U CN201620643714 U CN 201620643714U CN 206471938 U CN206471938 U CN 206471938U
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Abstract
A kind of step skewed pole rotor and motor, its key technology is, motor is divided into two segment length identical rotor sections on rotor axial direction, the angle between the first rotor section and the second rotor section on circumferencial direction is 1=β of α × 180/LCM (Z1,2p) mechanical angle；Wherein, β is to be segmented rake ratio, and 0.53 >=β >=0.4；The step skewed pole rotor is that surface permanent magnetic body rotor structure and its permanent magnet use tile type structure, and its sectional area has tile-type, has 4 sides, two straight line L1, and L2 and two camber line side, two radius of curvature are respectively R1 and R2, and R2 is more than R1；And permanent magnet is that thick middle both sides are thin, its maximum gauge is h, and the MgO-ZrO_2 brick of motor is 1, and every section of polar arc angle is identical, and more than or equal to π π p/LCM (Z1, 2p) and electrical angle.Step skewed pole rotor of the present utility model, inclination angle is less than conventional recommendation value and taken into account simultaneously with optimization cogging torque.
Description
Technical field
The utility model is related to the surface permanent magnetic rotor technology field of magneto, especially a kind of step skewed pole rotor
And its motor.
Background technology
Usual magneto can be weakened cogging torque by way of skewed stator slot or skewed-rotor and improve magnetic field and anti-
The sine of electromotive force, but skewed stator slot or the integral inclined certain angle of rotor magnetic pole (continuous oblique pole) are either used,
The complexity of motor batch production and the manufacturing cost of motor will be increased, rotor is as shown in Figure 1a.Therefore rotor segment
Oblique pole be simple to manufacture with it and low cost and receive much concern.
, generally can be according to formula in order to effectively weaken cogging torque and counter electromotive force harmonic wave
Obtain the optimum incline angle of step skewed pole.Wherein, α is the optimum incline angle (mechanical angle) of step skewed pole, and n is by magnetic pole point
Hop count；Z1For number of stator slots；2p is rotor number of poles；LCM(Z1, 2p) and it is number of stator slots and the least common multiple of rotor number of poles.
According to formula as can be seen that the optimum angle additionally depends on the hop count that magnetic pole divides.Fig. 1 b to Fig. 1 c give rotor axial direction
It is divided into the relative position schematic diagram after two sections.
But for the motor that axial length is limited, core length is shorter, and in view of producing in enormous quantities and processing
Situation, its rotor is only capable of being divided into two sections.In order to meet the requirement of higher power density, it generally uses larger magnetic pole polar arc angle
Degree.But the situation shown in Fig. 2 a to Fig. 2 b just now occurs as above-mentioned traditional optimum incline angle inclined rotor, i.e., it is front and rear
Two-stage rotor, the N poles of first paragraph occur overlapping the part contacted with the S poles of second segment；The interpolar of motor axial direction can so be increased
Leakage field, so as to reduce the power output of motor.
In order to solve the above problems, non-magnetic cover plate is generally placed between two-stage rotor and separates two-stage rotor, and
The thickness of cover plate is typically larger than the gas length being equal between electric machine rotor, can so increase the entire length of motor, motor work(
Rate density will be reduced.As shown in Figure 3.
In addition, although above-mentioned traditional optimum incline angle can obtain relatively low cogging torque, but for every extremely per phase groove
For number is 1 motor, the inclination angle is still larger, and this can reduce output torque, influences power density.But it is defeated in order to improve
Go out torque, using less non-optimal inclination angle, the purpose of optimization cogging torque is not had again.
Utility model content
In order to solve because polar arc angle is excessive, it is overlapping so as to the problem of influenceing power output axial opposite pole occur,
The utility model provides a kind of step skewed pole rotor and its motor, can effectively reduce the oblique polar angle degree of optimal segmentation and while obtain compared with
Low cogging torque.
The utility model solves the technical scheme that its technical problem used：
The utility model provides a kind of step skewed pole rotor, and motor is divided into two segment length phases by it on rotor axial direction
Same rotor section, the angle between the first rotor section and the second rotor section on circumferencial direction is α 1=β × 180/LCM (Z1,2p)
Mechanical angle；Wherein, β is to be segmented rake ratio, and 0.53 >=β >=0.4.
The utility model also provides a kind of step skewed pole rotor, and motor is divided into first paragraph and turned by it on rotor axial direction
Son and two sections of second segment rotors, its every section second segment rotor length are 1/2nd of first paragraph rotor length, and two section second
First paragraph rotor both sides, angle phase of two sections of second segment rotors with first paragraph rotor in a circumferential direction are installed to before and after section rotor
Together, it is α 1=β × 180/LCM (Z1,2p) mechanical angle；Wherein, β is to be segmented rake ratio, and 0.53 >=β >=0.4.
Preferably, step skewed pole rotor described in above two is surface permanent magnetic body rotor structure and its permanent magnet
Using tile type structure, its sectional area has tile-type, has 4 sides, two straight line L1, L2 and two camber line side, two
Radius of curvature is respectively R1 and R2, and R2 is more than R1.
Effect is preferably, the permanent magnet of the step skewed pole rotor is thin for thick middle both sides, and its maximum gauge is h, motor
MgO-ZrO_2 brick be 1, every section of polar arc angle is identical, and more than or equal to π-π p/LCM (Z1, 2p) and electrical angle.
Preferably, step skewed pole rotor described in above two has 8 magnetic poles, and 0.53 >=β >=0.5,0.74
× R2 >=R1 >=0.64 × R2, every section of polar arc angle is equal to π-π p/LCM (Z1,2p) electrical angle, and R2 is more than or equal to H, wherein, H is
Origin O is to the paracentral distance of permanent magnet inner arc.
Preferably, connected between the two-stage rotor of step skewed pole rotor described in above two using rivet or bolt
Connect, and the rivet hole of first paragraph rotor is centrally located on motor d axles, the rivet hole of second segment rotor is centrally located at and motor d axles
On the M lines for differing α 1, and first paragraph rotor is consistent with the rivet hole center radius of second segment rotor.
Preferably, the rivet hole of the second segment rotor of step skewed pole rotor described in above two is into keyhole shape
Shape.
The utility model also provides a kind of motor, and it includes two kinds of above-mentioned step skewed pole rotors.
The beneficial effects of the utility model are that the utility model can reduce the angle of inclination of two sections of oblique pole rotors, its
Less than traditional optimum incline angle.Compared with the effect of traditional optimum incline angle, lower cogging torque can be obtained.And it is less
Angle of inclination reduces the weakening effect to motor output torque, reduces the intersection of axially distinct magnetic pole, reduces axle
To leakage field, output torque and power density are further increased.
Brief description of the drawings
The utility model is further illustrated with reference to the accompanying drawings and examples.
Fig. 1 a are rotor schematic diagrames；
Fig. 1 b are two-stage rotor magnetic pole axial direction relative position schematic diagrames in the prior art；
Fig. 1 c are two-stage rotor circumferencial direction relative position and optimum incline angle schematic diagram in the prior art；
Fig. 2 a are that two-stage rotor magnetic pole overlaps contact schematic diagram in the prior art；
Fig. 2 b are that two-stage rotor magnetic pole is overlapped and axial leakage magnetic flux schematic diagram in the prior art；
Fig. 3 is that two-stage rotor magnetic pole sets cover plate schematic diagram in the prior art；
Fig. 4 is segmented rotor permanent magnet pole scale diagrams of the present utility model；
Fig. 5 a are the rooved face formula magneto profile of 8 pole 24 of prior art；
Fig. 5 b are the cogging torque oscillogram of the rooved face formula magneto of 8 pole 24 of prior art；
Fig. 6 a are the rooved face formula magneto profile of 8 pole 24 of the present utility model；
Fig. 6 b are the cogging torque oscillogram of the rooved face formula magneto of 8 pole 24 of the present utility model；
Fig. 7 a are two-stage rotor circumferencial direction relative position of the present utility model and optimum incline angle schematic diagram；
Fig. 7 b be two-stage rotor magnetic pole of the present utility model between without intersection sterogram；
Fig. 7 c are without intersection schematic diagram between two-stage rotor magnetic pole relative position of the present utility model and magnetic pole；
Fig. 7 d are the back emf waveform schematic diagram of magneto of the present utility model；
Fig. 8 is the cogging torque oscillogram of the rooved face formula magneto of another 8 pole 24 of the present utility model；
Fig. 9 a are the rooved face formula magneto profile of 4 pole 12 of the present utility model；
Fig. 9 b are the cogging torque oscillogram of the rooved face formula magneto of 4 pole 12 of the present utility model；
Figure 10 is the cogging torque oscillogram of the rooved face formula magneto of another 4 pole 12 of the present utility model；
Figure 11 is the cogging torque oscillogram of the rooved face formula magneto of another 8 pole 24 of the present utility model；
Figure 12 a are the rooved face formula magneto profile of 8 pole 24 of the present utility model；
Figure 12 b are the rooved face formula permanent magnet of permanent magnet motor pole dimension schematic diagram of 8 pole 24 of the present utility model；
Figure 13 is the cogging torque oscillogram of the rooved face formula magneto of 8 pole 24 of the present utility model；
Figure 14 is cogging torque of the present utility model and segmentation rake ratio graph of a relation；
Figure 15 a are second segment rotor of the present utility model and its position view with motor d axles；
Figure 15 b are first paragraph rotor of the present utility model and its position view with motor d axles；
Figure 16 a are the Distribution of Magnetic Field figure of the second segment rotor using the utility model rivet hole；
Figure 16 b are the Distribution of Magnetic Field figure of the second segment rotor using prior art rivet hole；
Figure 17 is another second segment rotor of the present utility model and first paragraph rotor-position relation schematic diagram.
Embodiment
The utility model is described in further detail presently in connection with accompanying drawing.These accompanying drawings are simplified schematic diagram,
Only illustrate basic structure of the present utility model in a schematic way, therefore it only shows the composition relevant with the utility model.
As shown in Fig. 4 and Fig. 7 a to Fig. 7 c, the utility model provides a kind of step skewed pole rotor, and it is in rotor axial direction
Be divided into two segment length identical rotor sections, the angle between the first rotor section and the second rotor section on circumferencial direction be α 1=β ×
180/LCM (Z1,2p), β are the decimal less than 1, and its representative value is 0.53 >=β >=0.4, and the β is segmentation rake ratio (when β=1
When α 1 be traditional optimum incline angle).Its rotor is surface permanent magnetic body rotor structure and its permanent magnet uses tile type structure,
Its sectional area has tile-type, has 4 sides, two straight line L1, L2 and two camber line side, and two radius of curvature are respectively R1
And R2, and R2 is more than R1, so as to produce non-uniform gap.Wherein, permanent magnet is that thick middle both sides are thin, and its maximum gauge is h, electricity
The MgO-ZrO_2 brick of machine is 1, and every section of polar arc angle is identical, and more than or equal to π-π p/LCM (Z1, 2p) and electrical angle.
Embodiment：
A kind of step skewed pole rotor with 8 magnetic poles, it is divided into two segment length identical rotors in rotor axial direction
Section, the angle between the first rotor section and the second rotor section on circumferencial direction is α 1, α 1=β × 180/LCM (Z1,2p), and
0.53 >=β >=0.5, wherein β are segmentation rake ratio, and its rotor is surface permanent magnetic body rotor structure and its permanent magnet is used
Its sectional area of tile type structure has tile-type, has 4 sides, two straight line L1, L2 and two camber line side, two camber lines half
Footpath is respectively R1 and R2, wherein 0.74 × R2 >=R1 >=0.64 × R2.The MgO-ZrO_2 brick of its motor is 1, every section of polar arc angle
Degree is identical, and equal to π-π p/LCM (Z1,2p) electrical angle, R2 is more than or equal to H, and (H is origin O (close former to permanent magnet inner arc side
Point O arc side) center distance).As shown in figure 14, as 0.74 × R2 >=R1 >=0.64 × R2, during 0.53 >=β >=0.5, it can obtain
Situation of cogging torque when being less than β=1, this is that this patent is pursued：Inclination angle is less than conventional recommendation value and optimized
Cogging torque.It can also be seen that this patent is not the simple combination of skewed-rotor and not wide magnetic pole (or non-uniform gap),
Such as R1/R2=0.62 or R1/R2=0.81, its β<It is that can not obtain the minimum of cogging torque when 1, turns to optimize teeth groove
Square, its angle of inclination should be conventional recommendation value, without reduction intentionally.In other words, it is less than conventional recommendation if now chosen
The angle of inclination of value, will sacrifice the optimization to cogging torque.And the rotor that this patent is proposed, its inclination angle is pushed away less than tradition
Value is recommended with optimization cogging torque while taking into account.
As shown in figs. 15 a and 15b, rivet or bolt connection are used between the utility model two-stage rotor, its first paragraph turns
The rivet hole of son is centrally located on motor d axles, and the rivet hole of second segment rotor is centrally located to differ on α 1 M lines with motor d axles,
And their rivet hole center radius is consistent.
As shown in fig. 16 a and 16b, the rivet hole of second segment rotor generally keyhole shape, in order that motor generation pair
The magnetic circuit of title, so that the magnetic pull produced due to asymmetric magnetic circuit is reduced or eliminated.
As shown in figure 17, another axial connected mode below figure of this patent, is divided into first paragraph rotor by motor, and
Two sections of second segment rotors, it is 1/2nd of first paragraph rotor per segment length.And is installed to before and after two sections of second segment rotors
One section of rotor both sides, this two sections of second segment rotors are identical with respect to the angle angle of first paragraph, and this two sections of second segment rotors are relative
The offset direction of first paragraph rotor is consistent, and other specification is repeated no more again with above-mentioned axial connected mode.It can so weaken
Or eliminate due to the axial magnetic pull that the oblique pole of motor is produced.
Data verification：
As shown in figure 5 a and 5b, a rooved face formula magneto of 8 pole 24, its R1=R2+h, L1 is parallel with L2, and R2
=H, its polar arc angle is 150 ° of electrical angles.It is all two sections of L that motor shaft is divided into length upwards, when it is segmented rake ratio β=1
Optimal cogging torque can be obtained.This is the example of traditional optimum incline angle.As described in background, although effectively reduce
Cogging torque but because traditional optimum incline angle is larger, result in and axially there is opposed polarity magnetic pole overlapping region, so that
Axial interelectrode magnetic leakage is added, so as to influence power output.
As shown in figures 6 a and 6b, a rooved face formula magneto of 8 pole 24, its R1/R2=0.67, L1 is parallel with L2,
And R2=H, its polar arc angle is 150 ° of electrical angles.Motor shaft is divided into two sections that length is all L upwards, and it is segmented rake ratio and takes β
=0.5.As can be seen that β=0.5 when situation of cogging torque when being less than β=1, it is optimal that this patent can effectively reduce tradition
It is segmented inclination angle.As shown in Fig. 7 a, 7b and 7c, this patent not only efficiently reduces cogging torque, and reduces and most preferably incline
Oblique angle, eliminates or reduces axially distinct polarity poles overlapping region, so as to reduce axial interelectrode magnetic leakage.Such as Fig. 7 d and table 1
It is shown, correspondence back emf waveform and irregularity of wave form, it can be seen that it is humorous that this patent rotor structure can effectively reduce counter electromotive force
Ripple content, and because inclination angle is smaller, its weakening effect to counter electromotive force (EMF) is smaller.
Table 1
| EMF(RMS)/V | △EMF | Irregularity of wave form | |
| Not oblique pole | 27.788 | 0% | 2.11% |
| β=0.5 | 27.546 | - 1% | 1.29% |
| β=1 | 26.838 | - 3% | 1.39% |
As shown in figure 8, the cogging torque curve of another rooved face formula magneto of 8 pole 24, its R1/R2=0.74, point
Section rake ratio takes β=0.53, R2=H, and its polar arc angle is 150 ° of electrical angles.As can be seen that β=0.53 when cogging torque
Be less than situation during β=1, this patent can effectively reduce traditional optimal segmentation inclination angle (motor it is related to schematic diagram not to
Go out).
As shown in figure 11, the cogging torque curve of another rooved face formula magneto of 8 pole 24, its R1/R2=0.67, point
Section rake ratio takes β=0.5, R2=H, and its polar arc angle is 153 ° of electrical angles.As can be seen that β=0.5 when cogging torque will
Situation during less than β=1, this patent can effectively reduce traditional optimal segmentation inclination angle (motor correlation is not provided to schematic diagram).
As depicted in figs. 12 a and 12b, a rooved face formula magneto of 8 pole 24, its R1/R2=0.67, L1 and L2 is put down
OK, and R2>H, its polar arc angle is 150 ° of electrical angles.Motor shaft is divided into two sections that length is all L upwards, and it is segmented rake ratio and taken
β=0.5.As can be seen from Figure 13, situation when cogging torque during β=0.5 is less than β=1, this patent can effectively reduce biography
Optimal segmentation of uniting inclination angle.
Embodiment
As shown in figures 9 a and 9b, a rooved face formula magneto of 4 pole 12, its R1/R2=0.96, L1 is parallel with L2,
And R2=H, its polar arc angle is 150 ° of electrical angles.Motor shaft is divided into two sections that length is all L upwards, and it is segmented rake ratio and takes β
=0.4.As can be seen that β=0.4 when situation of cogging torque when being less than β=1, it is optimal that this patent can effectively reduce tradition
It is segmented inclination angle.
As shown in Figure 10, another rooved face formula magneto of 4 pole 12, its R1/R2=0.99, L1 is parallel with L2, and R2
=H, its polar arc angle is 150 ° of electrical angles, and its h is different from the motor of example 4.It is all the two of L that motor shaft is divided into length upwards
Section, it is segmented rake ratio and takes β=0.5.As can be seen that β=0.5 when situation of cogging torque when being less than β=1, this patent
Traditional optimal segmentation inclination angle can be effectively reduced (motor correlation is not provided to schematic diagram).
Using it is above-mentioned according to desirable embodiment of the present utility model as enlightenment, pass through above-mentioned description, related work people
Member can carry out various changes and amendments in the range of without departing from this utility model technological thought completely.This reality
The content on specification is not limited to new technical scope, it is necessary to its technology is determined according to right
Property scope.
Claims (8)
1. a kind of step skewed pole rotor, it is characterised in that motor is divided into two segment length identicals on rotor axial direction and turned
Subsegment, the angle between the first rotor section and the second rotor section on circumferencial direction is α 1=β × 180/LCM (Z1,2p) mechanical angle
Degree；Wherein, β is to be segmented rake ratio, and 0.53 >=β >=0.4.
2. a kind of step skewed pole rotor, it is characterised in that motor is divided into first paragraph rotor and two sections on rotor axial direction
Second segment rotor, its every section second segment rotor length is 1/2nd of first paragraph rotor length, and before two sections of second segment rotors
After be installed to first paragraph rotor both sides, angle of two sections of second segment rotors with first paragraph rotor in a circumferential direction is identical, is α
1=β × 180/LCM (Z1,2p) mechanical angle；Wherein, β is to be segmented rake ratio, and 0.53 >=β >=0.4.
3. the step skewed pole rotor as described in any claim of claim 1 or 2, it is characterised in that the step skewed pole turns
Son is surface permanent magnetic body rotor structure and its permanent magnet uses tile type structure, and its sectional area has tile-type, has 4
Side, two straight line L1, L2 and two camber line side, two radius of curvature are respectively R1 and R2, and R2 is more than R1.
4. step skewed pole rotor as claimed in claim 3, it is characterised in that the permanent magnet of the step skewed pole rotor is centre
Thick both sides are thin, and its maximum gauge is h, and the MgO-ZrO_2 brick of motor is 1, and every section of polar arc angle is identical, and more than or equal to π-π p/
LCM(Z1, 2p) and electrical angle.
5. the step skewed pole rotor as described in any claim of claim 1 or 2, it is characterised in that the step skewed pole turns
Son has 8 magnetic poles, and 0.53 >=β >=0.5,0.74 × R2 >=R1 >=0.64 × R2, and every section of polar arc angle is equal to π-π p/LCM
(Z1,2p) electrical angle, R2 is more than or equal to H, wherein, H is origin O to the paracentral distance of permanent magnet inner arc.
6. the step skewed pole rotor as described in any claim of claim 1 or 2, it is characterised in that the step skewed pole turns
Rivet or bolt connection are used between the two-stage rotor of son, and the rivet hole of first paragraph rotor is centrally located on motor d axles, second
The rivet hole of section rotor is centrally located to differ on α 1 M lines with motor d axles, and the rivet of first paragraph rotor and second segment rotor
Hole center radius is consistent.
7. the step skewed pole rotor as described in any claim of claim 1 or 2, it is characterised in that the riveting of second segment rotor
Nail is into keyhole shape.
8. a kind of motor, it is characterised in that including：Step skewed pole rotor as described in any claim of claim 1 or 2.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643714.9U CN206471938U (en) | 2016-06-27 | 2016-06-27 | A kind of step skewed pole rotor and its motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620643714.9U CN206471938U (en) | 2016-06-27 | 2016-06-27 | A kind of step skewed pole rotor and its motor |
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ID=59709679
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958691A (en) * | 2016-06-27 | 2016-09-21 | 伊泽瑞尔(大连)科技有限公司 | Segmented inclined-pole rotor and motor comprising same |
| CN110912300A (en) * | 2019-11-07 | 2020-03-24 | 联创汽车电子有限公司 | Rotating shaft and motor rotor unit |
| WO2020134424A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Compressor rotor, compressor, and refrigerant circulation system |
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2016
- 2016-06-27 CN CN201620643714.9U patent/CN206471938U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958691A (en) * | 2016-06-27 | 2016-09-21 | 伊泽瑞尔(大连)科技有限公司 | Segmented inclined-pole rotor and motor comprising same |
| CN105958691B (en) * | 2016-06-27 | 2018-05-25 | 伊泽瑞尔(大连)科技有限公司 | A kind of step skewed pole rotor and its motor |
| WO2020134424A1 (en) * | 2018-12-25 | 2020-07-02 | 珠海格力电器股份有限公司 | Compressor rotor, compressor, and refrigerant circulation system |
| KR20210107622A (en) * | 2018-12-25 | 2021-09-01 | 그리 일렉트릭 어플라이언시즈, 인코포레이티드 오브 주하이 | Compressor rotor, compressor and refrigerant circulation system |
| KR102617404B1 (en) | 2018-12-25 | 2023-12-27 | 그리 일렉트릭 어플라이언시즈, 인코포레이티드 오브 주하이 | Compressor rotor, compressor and refrigerant circulation system |
| US11946476B2 (en) | 2018-12-25 | 2024-04-02 | Gree Electric Appliances, Inc. Of Zhuhai | Compressor rotor, compressor and refrigerant circulation system |
| CN110912300A (en) * | 2019-11-07 | 2020-03-24 | 联创汽车电子有限公司 | Rotating shaft and motor rotor unit |
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Effective date of registration: 20180831 Address after: 116000 906-2 Koda Road, three Jianbao Industrial Park, Lushunkou District, Dalian, Liaoning Patentee after: Dalian Zhi Ding Technology Co., Ltd. Address before: 116000 No. 4, 1 unit 4, salt Island North Garden, Ganjingzi District, Dalian, Liaoning, No. 3, No. 4 Patentee before: Izawa Riel (Dalian) Technology Co., Ltd. |
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