CN104158322B - Rotor and with its motor - Google Patents
Rotor and with its motor Download PDFInfo
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- CN104158322B CN104158322B CN201410374844.2A CN201410374844A CN104158322B CN 104158322 B CN104158322 B CN 104158322B CN 201410374844 A CN201410374844 A CN 201410374844A CN 104158322 B CN104158322 B CN 104158322B
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Abstract
The invention discloses a kind of rotor and with its motor.The rotor includes：Body, there is rotor hole and a plurality of magnetic slot around the rotor hole on the body, the outer profile of the body includes a plurality of concentric segmental arc concentric with the rotor hole and the connecting line segment being connected between the concentric segmental arc, the a plurality of concentric segmental arc corresponds in radial directions with a plurality of magnetic slot respectively, the connecting line segment includes at least one straight-line segment, angle between the centre normal of wherein every straight-line segment and the line at its midpoint and the center of rotor hole is β, 0 °≤β≤20 °；Multiple magnet steel, wherein being equipped at least one magnet steel in every magnetic slot.Rotor according to embodiments of the present invention by the way that the outer profile of body is included a plurality of concentric segmental arc and the connecting line segment being connected between adjacent concentric segmental arc, is conducive to reduce the back-emf harmonic content of motor, reduces motor cogging torque and electromagnetic torque pulsation.
Description
Technical field
The present invention relates to motor field, more particularly, to a kind of rotor and with its motor.
Background technology
In traditional interior permanent magnet machines, there are the following problems：
First, motor cogging torque is big, and electromagnetic torque pulsation is big；
2nd, back-emf harmonic content is higher, and particularly low-frequency harmonics content is very high；
3rd, motor quadrature axis inductance is larger, and motor power factor is low, causes controller capacity big, of high cost；
4th, electric efficiency is low；
5th, motor noise vibration is big.
In this regard, existing have a kind of improvement project, by the center of circle of the Inner arc end face of stator tooth, the center of circle of rotor outer circle arc
With the center deviation of rotor hole.However, although the program solves the problems, such as above-mentioned first, second, but still existing defects.Tool
For body, stator Inner arc bias can reduce stator groove area, reduce the motor number of turn, and then influence electric efficiency；In addition, motor
Slot ripples increase, bring the increase of radial vibration, cause motor electromagnetic vibration and the increase of noise.
The content of the invention
It is contemplated that at least solve one of technical problem in the prior art.For this purpose, the present invention proposes a kind of electricity
Machine rotor, the rotor are conducive to reduce back-emf harmonic wave, reduce motor cogging torque and electromagnetic torque pulsation.
The invention also provides a kind of motors for including above-mentioned rotor.
The rotor of embodiment according to a first aspect of the present invention, including：Body has rotor hole and ring on the body
Around a plurality of magnetic slot of the rotor hole, the outer profile of the body include a plurality of concentric segmental arc concentric with the rotor hole and
The connecting line segment being connected between the concentric segmental arc, a plurality of concentric segmental arc is respectively with a plurality of magnetic slot in radial direction side
It corresponds upwards, the connecting line segment includes at least one straight-line segment, wherein the centre normal of every straight-line segment
Angle between the line at the center at the midpoint and rotor hole of the straight-line segment is β, 0 °≤β≤20 °；Multiple magnetic
Steel, wherein being equipped at least one magnet steel in every magnetic slot.
Rotor according to embodiments of the present invention, by the way that the outer profile of body is included a plurality of concentric segmental arc and is connected to
Connecting line segment between adjacent concentric segmental arc is conducive to reduce the back-emf harmonic content of motor, reduces motor cogging torque
And electromagnetic torque pulsation.
According to some embodiments of the present invention, the central angle alpha of the concentric segmental arc=360/P* θ, wherein P are rotor pole
Number, 0 ＜ θ≤0.8.
According to some embodiments of the present invention, the connecting line segment includes at least two straight-line segments.
According to some embodiments of the present invention, the both ends end of the every magnetic slot connecting line segment adjacent thereto
Between the magnetic bridge thickness T range that limits be 0.3mm≤T≤1.0mm.
According to some embodiments of the present invention, have to each other between the magnetic slot and its corresponding concentric segmental arc
The a plurality of slit separated.By setting slit, be conducive to reduce the quadrature axis inductance of motor, reduce the capacity of motor, so as to reduce
Cost.
Optionally, a plurality of slit compared with the center of the central point and rotor hole of the concentric segmental arc line
Symmetrically.
According to some embodiments of the present invention, the slit is two.
According to some embodiments of the present invention, two slits each parallel to the concentric segmental arc central point with it is described
The line at the center of rotor hole.
According to some embodiments of the present invention, the distance between described two slits L and two of magnet steel in the magnetic slot
Meet between the distance between end Lm：
L=Lm*k, wherein 0.2≤k≤0.8.
According to some embodiments of the present invention, one end of the neighbouring concentric segmental arc of two slits is towards described same
The central point of heart segmental arc and the line at the center of the rotor hole tilt.
According to some embodiments of the present invention, the distance between one end of the neighbouring concentric segmental arc of two slits
For L1, the distance between one end of the neighbouring magnetic slot of two slits is L2, wherein 0.5≤L1/L2≤0.8.
Further, the distance between both ends of magnet steel are Lm, wherein L2=Lm*k in the magnetic slot, wherein 0.2≤k
≤0.8。
According to some embodiments of the present invention, one end of the neighbouring concentric segmental arc of the slit and the concentric segmental arc
The distance between for H1, the distance between one end of the neighbouring magnetic slot of the slit and described magnetic slot are H2, wherein
0.3mm≤H1≤0.6mm、0.3mm≤H2≤0.6mm。
According to some embodiments of the present invention, the magnetic slot is for elongate in shape and perpendicular to the center of the concentric segmental arc
Point and the line at the center of the rotor hole, each magnetic slot is interior to have a magnet steel.
Rotor according to embodiments of the present invention includes a plurality of concentric segmental arc and connecting line by the outer profile for making body
Section, while slit is set between magnetic slot and its corresponding concentric segmental arc, tooth boots ripple can be inhibited jointly, be conducive to reduce
The electric and magnetic oscillation of motor.
A kind of motor of embodiment according to a second aspect of the present invention, including：Motor stator, it is fixed to have on the motor stator
Sub-aperture and multiple stator slots around the stator hole, the stator slot are connected with the stator hole, limited between adjacent stator slots
Make stator tooth；Rotor described in embodiment according to a first aspect of the present invention, the rotor are rotatably provided in institute
It states in stator slot, the rotor hole and the stator hole are concentric.
Due to the rotor described in above-described embodiment, reducing the back-emf harmonic content of motor, and reducing
Motor cogging torque and electromagnetic torque pulsation；In addition, reduce the back-emf harmonic content of motor and quadrature axis inductance.In addition, may be used also
To inhibit tooth boots ripple, be conducive to reduce the electric and magnetic oscillation of motor.
According to some embodiments of the present invention, the radial inner end end face of the stator tooth be formed as in the stator hole
The concentric curved end of the heart.In this way, on the basis of motor cogging torque and electromagnetic torque pulsation is reduced, the slot of motor is not reduced
Area, such umber of turn need not be reduced, so as to promote the efficiency of motor.
According to some embodiments of the present invention, between the quantity S of the stator slot and the rotor number of poles P of the rotor
Meet：P/S=2/3.
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
It obtains substantially or is recognized by the practice of the present invention.
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 schematic diagram of motor according to an embodiment of the invention；
Fig. 2 is the schematic diagram of motor in accordance with another embodiment of the present invention.
Reference numeral：
Rotor 100；
Body 1；Rotor hole 11；Magnetic slot 12；Concentric segmental arc 101；Connecting line segment 102；
Magnet steel 2；Slit 3；
The central point of concentric segmental arc 101 and the line X at the center of rotor hole 11；
Motor stator 200；Stator hole 210；Stator slot 220；
Stator tooth 230；The radial inner end end face 231 of stator tooth
Specific embodiment
The embodiment of the present invention is 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 has the function of same or like element.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " " center ", " thickness ", " interior ", " outer ", " axial direction ", " footpath
To ", the orientation of the instructions such as " circumferential direction " or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of and retouch
It states the present invention and simplifies description rather than instruction or imply that signified device or element must have specific orientation, with specific
Azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for retouching
Purpose is stated, and it is not intended that instruction or hint relative importance or the implicit quantity for indicating indicated technical characteristic.By
This defines " first ", one or more this feature can be expressed or be implicitly included to the feature of " second ".In this hair
In bright description, unless otherwise indicated, " multiple " are meant that two or more.
In the description of the present 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；It can
To be mechanical connection or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, Ke Yishi
Connection inside two elements.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
The rotor 100 of embodiment according to a first aspect of the present invention, the rotor are described below with reference to Fig. 1-Fig. 2
100 in motor.
Rotor 100 according to embodiments of the present invention, including：Body 1 and multiple magnet steel 2.
As depicted in figs. 1 and 2, there is rotor hole 11 and a plurality of magnetic slot 12 in surrounding rotor hole 11, body 1 on body 1
Outer profile include a plurality of concentric segmental arc 101 concentric with rotor hole 11 and the company that is connected between adjacent concentric segmental arc 101
Wiring section 102.A plurality of concentric segmental arc 101 is respectively with a plurality of magnetic slot 12 in the one-to-one corresponding in the radial direction of body 1, connecting line
Section 102 includes at least one straight-line segment 1021, wherein in the centre normal of every straight-line segment 1021 and the straight-line segment
Angle between the line at the center of point and rotor hole 11 is β, 0 °≤β≤20 °.Here centre normal, referred to straight line
The midpoint of line segment 1021 and perpendicular to the normal of straight-line segment 1021.In some optional examples, every straight-line segment 1021
Centre normal passes through the center of rotor hole 11, in other words, the midpoint of every straight-line segment 1021 and the line in the center of circle perpendicular to
The straight-line segment 1021, and the vertical range between the center of rotor hole 11 and connecting line segment 102 is less than the half of concentric segmental arc 101
Footpath.Optionally, connecting line segment 102 includes at least two straight-line segments 1021.
At least one magnet steel 2 is equipped in every magnetic slot 12.In example as depicted in figs. 1 and 2, magnetic slot 12 is length
Strip and perpendicular to concentric segmental arc 101 central point and rotor hole 11 center line X, have one in each magnetic slot 12
Magnet steel 2 in the subsequent descriptions of the present invention, will also be described by taking the magnetic slot 12 of this shape as an example.Certainly, the present invention simultaneously
It is without being limited thereto.In other examples, magnetic slot 12 can also be formed as opening towards the outer peripheral V-shaped groove of body, at this point, magnetic
Two magnet steel being separated from each other (not shown) can be placed in steel tank 12.
Rotor 100 according to embodiments of the present invention, by the way that the outer profile of body 1 is included a plurality of concentric segmental arc 101
And the connecting line segment 102 being connected between adjacent concentric segmental arc 101, be conducive to reduce the back-emf harmonic content of motor, subtract
Small machine cogging torque and electromagnetic torque pulsation.
According to some embodiments of the present invention, the central angle alpha of concentric segmental arc 101=360/P* θ wherein P be rotor number of poles, 0
＜ θ≤0.8, further, 0.4≤θ≤0.8.
In example as depicted in figs. 1 and 2, the both ends end connecting line segment 102 adjacent thereto of every magnetic slot 12 it
Between limit magnetic bridge 13, and the thickness T range of magnetic bridge 13 is 0.3mm≤T≤1.0mm.Wherein, the magnetic bridge line at q shaft positions
Straight-line segment may be employed to be attached.Wherein, the term " q axis " mentioned in description of the invention is ripe for those skilled in the art
Know, be not described in detail herein.
In some embodiments, as depicted in figs. 1 and 2, have between magnetic slot 12 and its corresponding concentric segmental arc 101
There is a plurality of slit 3 being separated from each other.By setting slit 3, be conducive to reduce the quadrature axis inductance of motor, reduce the appearance of motor
Amount, so as to reduce cost.
Optionally, a plurality of slit 3 is symmetrical compared with the central point of concentric segmental arc 101 and the line X at the center of rotor hole 11,
Such as the central point of a concentric segmental arc 101 and the line X at the center of rotor hole 11 are shown in which in Fig. 1 and Fig. 2.At one
In example, slit 3 can be the odd number item that quantity is more than or equal to 3, and being now placed in most central slit 3 will be compared with line X
Itself is symmetrical, and remaining slit 3 is respectively positioned at the both sides of line X and symmetrical compared with line X.In another example, it is narrow
Seam 3 can be even number item, at this time even number slit 3 two parts are divided by line X, positioned at line X both sides two parts compared with
Line X is symmetrical.
To there are two slits 3 being separated from each other between magnetic slot 12 and its corresponding concentric segmental arc 101 below
Exemplified by, rotor according to the present invention is illustratively described.
In embodiment as shown in Figure 1, two slits 3 are each parallel to the central point of concentric segmental arc 101 and rotor hole 11
The line X at center.By taking the slit 2 being located between the magnetic slot 12 on Fig. 1 tops and its corresponding concentric segmental arc 101 as an example, magnetic
Steel tank 12 is horizontally disposed, which is each perpendicular to magnetic slot 12.The distance between two slits 3 L and magnetic in magnetic slot 12
Meet between the distance between the both ends of steel 2 Lm：
L=Lm*k, wherein 0.2≤k≤0.8.
Optionally, the distance between one end of the neighbouring concentric segmental arc 101 of slit 3 and concentric segmental arc 101 are H1, slit 3
Neighbouring magnetic slot 12 one end and the distance between magnetic slot 12 be H2, wherein 0.3mm≤H1≤0.6mm, 0.3mm≤H2≤
0.6mm, optionally, H1=H2.
In embodiment as shown in Figure 2, one end of the neighbouring concentric segmental arc 101 of two slits 3 is towards concentric segmental arc 101
Central point and the line X at the center of rotor hole 11 are tilted.The distance between one end of neighbouring concentric segmental arc 101 of two slits 3
For L1, the distance between one end of neighbouring magnetic slot 12 of two slits 3 is L2, wherein 0.5≤L1/L2≤0.8.Further
Ground, as shown in Fig. 2, the distance between both ends of magnet steel 2 are Lm, wherein L2=Lm*k in magnetic slot 12, wherein 0.2≤k≤
0.8.The design of slit 3 is convenient and simple as a result,.
Optionally as well, in the present embodiment, between one end of the neighbouring concentric segmental arc 101 of slit 3 and concentric segmental arc 101
Distance for H1, the distance between one end of the neighbouring magnetic slot 12 of slit 3 and magnetic slot 12 are H2, wherein 0.3mm≤H1≤
0.6mm, 0.3mm≤H2≤0.6mm, optionally, H1=H2.
Rotor according to embodiments of the present invention includes a plurality of concentric segmental arc and connecting line by the outer profile for making body
Section, while slit is set between magnetic slot and its corresponding concentric segmental arc, tooth boots ripple can be inhibited jointly, be conducive to reduce
The electric and magnetic oscillation of motor.
A kind of motor of embodiment according to a second aspect of the present invention, including：Motor stator 200 and rotor 100, wherein
Rotor can according to first aspect present invention embodiment electronics rotor.As depicted in figs. 1 and 2, on motor stator 200
Multiple stator slots 220 with stator hole 210 and around stator hole 210, stator slot 220 are connected with stator hole 210, adjacent stators
Stator tooth 230 is limited between slot 220.Rotor 100 is rotatably provided in stator slot 220, rotor hole 11 and stator hole
210 with one heart.
Motor according to embodiments of the present invention, due to the rotor described in above-described embodiment, reducing motor
Back-emf harmonic content, and reduce motor cogging torque and electromagnetic torque pulsation；In addition, the back-emf harmonic wave for reducing motor contains
Amount and quadrature axis inductance.Further, it is also possible to inhibit tooth boots ripple, be conducive to reduce the electric and magnetic oscillation of motor.
In some embodiments of the invention, the radial inner end end face 231 of stator tooth 230 is formed as and stator hole 210
The concentric curved end in center.In this way, on the basis of motor cogging torque and electromagnetic torque pulsation is reduced, do not reduce motor
Groove area, such umber of turn need not be reduced, so as to promote the efficiency of motor.
Meet between the quantity S of stator slot 220 and the rotor number of poles P of rotor 100：P/S=2/3.That is, root
According to the above-mentioned rotor of the present invention, except the motor of six slot of Fig. 1 and quadrupole shown in Figure 2, in nine slot of sextupole and octupole ten
Two slots etc. meet equally applicable in other motors of P/S=2/3.
Other of motor according to embodiments of the present invention are formed and operated for those of ordinary skills all
It is known, is not detailed herein.
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 of the present invention or example.In the present specification, to above-mentioned term
Schematic representation may not refer to the same embodiment or example.Moreover, specific features, structure, material or the spy of description
Point can in an appropriate manner combine 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 of the present invention and objective 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 (12)
1. a kind of rotor, which is characterized in that including：
Body has rotor hole and a plurality of magnetic slot around the rotor hole, the outer profile bag of the body on the body
The a plurality of concentric segmental arc concentric with the rotor hole and the connecting line segment being connected between the concentric segmental arc are included, it is described a plurality of same
Heart segmental arc corresponds in radial directions with a plurality of magnetic slot respectively, and the both ends of the connecting line segment are respectively along described
The circumferentially extending of body and more than the two neighboring magnetic slot end, the connecting line segment include at least two straight-line segments,
The line at the midpoint of the centre normal of the wherein every straight-line segment and the straight-line segment and the center of the rotor hole it
Between angle be β, 0 °≤β≤20 °；
Multiple magnet steel, wherein be equipped at least one magnet steel in every magnetic slot, in the magnetic slot and its corresponding same
There is a plurality of slit being separated from each other, the slit is two, and two slits are each parallel to described same between heart segmental arc
The central point of heart segmental arc and one end of the neighbouring concentric segmental arc of the line or two slits at the center of the rotor hole
It is tilted towards the line at the center of the central point and rotor hole of the concentric segmental arc.
2. rotor according to claim 1, which is characterized in that the central angle alpha of the concentric segmental arc=360/P* θ,
Wherein P be rotor number of poles, 0 ＜ θ≤0.8.
3. rotor according to claim 1, which is characterized in that the both ends end of every magnetic slot is adjacent
The connecting line segment between the magnetic bridge thickness T range that limits be 0.3mm≤T≤1.0mm.
4. rotor according to claim 1, which is characterized in that a plurality of slit is compared with the concentric segmental arc
Central point and the line at the center of the rotor hole are symmetrical.
5. rotor according to claim 1, which is characterized in that the distance between described two slits L and the magnetic
Meet in steel tank between the Lm of the distance between both ends of magnet steel：
L=Lm*k, wherein 0.2≤k≤0.8.
6. rotor according to claim 1, which is characterized in that the neighbouring concentric segmental arc of two slits
The distance between one end is that the distance between L1, one end of the neighbouring magnetic slot of two slits is L2, wherein 0.5≤
L1/L2≤0.8。
7. rotor according to claim 6, which is characterized in that the distance between both ends of magnet steel in the magnetic slot
For Lm, wherein L2=Lm*k, wherein 0.2≤k≤0.8.
8. rotor according to claim 1, which is characterized in that one end of the neighbouring concentric segmental arc of the slit
The distance between described concentric segmental arc is H1, between one end of the neighbouring magnetic slot of the slit and the magnetic slot
Distance is H2, wherein 0.3mm≤H1≤0.6mm, 0.3mm≤H2≤0.6mm.
9. rotor according to claim 1, which is characterized in that the magnetic slot is for elongate in shape and perpendicular to described
The central point of concentric segmental arc and the line at the center of the rotor hole, each magnetic slot is interior to have a magnet steel.
10. a kind of motor, which is characterized in that including：
Motor stator has stator hole and multiple stator slots around the stator hole, the stator slot on the motor stator
It is connected with the stator hole, stator tooth is limited between adjacent stator slots；
According to the rotor any one of claim 1-9, the rotor is rotatably provided in the stator slot
In, the rotor hole and the stator hole are concentric.
11. motor according to claim 10, which is characterized in that the radial inner end end face of the stator tooth is formed as and institute
State the concentric curved end in the center of stator hole.
12. motor according to claim 10, which is characterized in that the quantity S of the stator slot and the rotor
Meet between rotor number of poles P：
P/S=2/3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374844.2A CN104158322B (en) | 2014-07-31 | 2014-07-31 | Rotor and with its motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410374844.2A CN104158322B (en) | 2014-07-31 | 2014-07-31 | Rotor and with its motor |
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| CN104158322A CN104158322A (en) | 2014-11-19 |
| CN104158322B true CN104158322B (en) | 2018-05-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2014402196B2 (en) * | 2014-07-31 | 2018-10-04 | Guangdong Welling Motor Manufacturing Co., Ltd. | Motor rotor and motor having same |
| CN107852048B (en) * | 2015-09-08 | 2019-10-25 | 日立江森自控空调有限公司 | Permanent magnet type electric rotating motivation and the compressor for using it |
| JP6894663B2 (en) * | 2015-10-29 | 2021-06-30 | 株式会社富士通ゼネラル | Rotor and permanent magnet motor |
| CN106169822B (en) * | 2016-06-15 | 2018-11-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor and its rotor structure |
| CN106340982B (en) * | 2016-10-19 | 2018-12-25 | 珠海格力电器股份有限公司 | Rotor of permanent magnet synchronous motor and motor |
| CN106787324A (en) * | 2017-02-24 | 2017-05-31 | 依必安派特风机(上海)有限公司 | A kind of rotor and motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101095556B1 (en) * | 2005-06-13 | 2011-12-19 | 삼성전자주식회사 | A permanent magnet motor |
| CN101330231A (en) * | 2007-06-19 | 2008-12-24 | 上海海立（集团）股份有限公司 | Permanent magnet motor stator and rotor for compressor |
| CN101425708A (en) * | 2007-10-31 | 2009-05-06 | 瑞智精密股份有限公司 | Permanent-magnetic electric motor |
| CN201667564U (en) * | 2010-04-06 | 2010-12-08 | 上海海立（集团）股份有限公司 | Stator, rotor structures of a permanent magnetic electric motor |
| CN102916544B (en) * | 2011-08-01 | 2015-06-10 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor structure, permanent-magnet synchronous motor and variable-frequency compressor |
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