CN104052227B - Permanent magnet synchronous reluctance motor and compressor with same - Google Patents
Permanent magnet synchronous reluctance motor and compressor with same Download PDFInfo
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- CN104052227B CN104052227B CN201410243253.1A CN201410243253A CN104052227B CN 104052227 B CN104052227 B CN 104052227B CN 201410243253 A CN201410243253 A CN 201410243253A CN 104052227 B CN104052227 B CN 104052227B
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Abstract
The invention discloses a permanent magnet synchronous reluctance motor and a compressor with the same. The permanent magnet synchronous reluctance motor comprises a stator and a rotor, wherein the stator is provided with a stator inner hole and a plurality of stator grooves surrounding the stator inner hole, stator teeth are positioned between two adjacent stator grooves, and stator coils are formed in the stator grooves in a surrounding mode. The rotor is arranged in the stator inner hole rotatably and provided with a rotor inner hole and a plurality of groups of installation grooves formed in the circumferential direction of the rotor inner hole, and each group of installation grooves include a plurality of installation grooves formed at intervals in the radial direction and used for containing permanent magnets. Widths W of the stator teeth and the shortest lengths L between the two adjacent groups of the installation grooves meet the formula of 1<L/W<1.5. According to the permanent magnet synchronous reluctance motor, electromagnetic torque of the motor is increased while reluctance torque is increased, and efficiency of the motor is increased. In addition, the compressor carrying the motor has high APF energy efficiency.
Description
Technical field
The present invention relates to Compressor Manufacturing field, especially relate to a kind of permanent-magnet synchronous reluctance motor and there is its compression
Machine.
Background technology
At present, in the motor that high magnetic conductive material is made, it is output torque and the efficiency of lifting motor, typically has
Multigroup permanent magnet being embedded in rotor core, every group of permanent magnet trough includes radially arranged 2 layer or more than 2 layers of permanent magnet
Layer, such motor has the characteristics that to make full use of reluctance torque, with the output torque of lifting motor and efficiency.
A kind of permanent-magnet synchronous reluctance motor is disclosed although motor in the prospectus of Chinese patent cn1149778a
Reluctance torque increased, and represents the pn* ψ a*iq of electromagnetic torque, due to the relatively low intrinsic spy of remanent magnetism br in Ferrite Material
Property, lead to the magnetic flux ψ a interlinking with motor stator relatively low, under electromagnetic torque is relatively low, thus total torque t increases less, motor
Improved efficiency is undesirable.
In addition, disclosing a kind of permanent-magnet synchronous magnetic resistance electricity in the Chinese patent application of Publication No. cn102511119a
Machine, though permanent magnet adopts the rare-earth Nd-Fe-B permanent magnet material of high remanent magnetism br, the magnetic flux ψ a interlinking with motor stator in its rotor
Higher, but its rotor q axial permanent magnet putting hole gap length arrange unreasonable, lead to armature reaction magnetic flux difficult
In passing through, enough armature reaction magnetic fluxs must could be produced with larger armature supply, lead to the inductance lq on q direction of principal axis
Little it is difficult to effectively utilize reluctance torque, lead to the improved efficiency of motor also not ideal enough.
And the enforcement with the new Energy Efficiency Standard of national convertible frequency air-conditioner, introduce energy-saving index apf standard (annual
Performance factor: annual energy resource consumption efficiency), during summation ÷ of cooling and warming ability needing in apf=1
Consume electricity, in order to improve apf, to the field that the actual operating time ratio specified duration of runs also will be grown, ability also will be low
Electric efficiency improve most effective fruit, therefore, in compressor, the improved efficiency in low speed field become most important problem.
Content of the invention
It is contemplated that at least solving one of technical problem present in prior art.For this reason, one object of the present invention
It is to propose a kind of permanent-magnet synchronous reluctance motor being obtained in that bigger output torque.
Further object is that proposing a kind of compressor with described permanent-magnet synchronous reluctance motor.
A kind of permanent-magnet synchronous reluctance motor of embodiment according to a first aspect of the present invention, comprising: stator, described stator has
Stator inner hole and the multiple stator slots around described stator inner hole, have stator tooth between two neighboring stator slot, described stator
It is wound with stator coil in groove；Rotor, described rotor is rotatably provided in described stator inner hole, and described rotor has in rotor
Hole and along the circumferentially disposed multigroup mounting groove of described rotor inner hole, mounting groove described in every group includes the multiple of radially spaced arrangement
Mounting groove for place permanent magnet, the wherein width w of stator tooth, beeline l between mounting groove described in two adjacent groups it
Between relation meet: 1 ＜ l/w ＜ 1.5.
Permanent-magnet synchronous reluctance motor according to embodiments of the present invention, can also increase motor while increasing reluctance torque
Electromagnetic torque, improve motor efficiency.In addition, the compressor carrying after this motor has high apf efficiency.
According to one embodiment of present invention, each described mounting groove is formed as substantially u shape shape, and includes: the first magnetic
Body groove, described first magnet slot setting first magnet in described rotor inner hole, described first magnet slot；Article two, the second magnet
Groove, described second magnet slot is all connected with described first magnet slot, and from the two ends of described first magnet slot away from described rotor
Endoporus extends, and all places the second magnet in described second magnet slot；Wherein, the shortest between mounting groove described in described two adjacent groups
It is the distance between second adjacent magnet slot between two adjacent groups apart from l.
Thus, by arranging the second adjacent magnet slot that mounting groove is substantially between u shape shape, and setting two adjacent groups
The distance between the width w of l and stator tooth relation 1 ＜ l/w ＜ 1.5 so that while increasing reluctance torque, also further
Ground increases the electromagnetic torque of motor, thus further increasing the efficiency of motor
Alternatively, described first magnet and the second magnet positioned at its both sides are all spaced apart in processing and manufacturing.
Alternatively, described second magnet slot extends to the outward flange of neighbouring described rotor.
According to one embodiment of present invention, in every group of mounting groove, between the first magnet slot of two neighboring mounting groove
Distance is t1, and the distance between corresponding second magnet slot is t2, wherein, t1≤t2, t2=w.Thus, not only process simply square
Just, and reluctance torque and electromagnetic torque can also be further increased.
According to one embodiment of present invention, described mounting groove is included along circumferentially disposed four groups of described rotor inner hole.By
This is easy to process, structure is simple.
According to one embodiment of present invention, described permanent magnet is rare-earth Nd-Fe-B permanent magnet.
Alternatively, the cross section of described permanent magnet is formed as rectangle.
According to one embodiment of present invention, described stator slot is 24, and described stator coil is 24.
Permanent-magnet synchronous reluctance motor according to embodiments of the present invention, by effectively utilizing reluctance torque, and makes this permanent magnetism
Synchronous magnetic resistance motor obtains larger output torque, and the efficiency of lifting motor.
A kind of compressor of embodiment according to a second aspect of the present invention, including described in embodiment according to a first aspect of the present invention
Permanent-magnet synchronous reluctance motor.
The additional aspect of the present invention and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description
The above-mentioned and/or additional aspect of the present invention and advantage will become from reference to the description to embodiment for the accompanying drawings below
Substantially and easy to understand, wherein:
Fig. 1 is the partial schematic diagram of permanent-magnet synchronous reluctance motor according to embodiments of the present invention；
Fig. 2 is the schematic diagram of the rotor of permanent-magnet synchronous reluctance motor according to embodiments of the present invention；
Fig. 3 is the armature reaction magnetic flux schematic diagram of permanent-magnet synchronous reluctance motor according to embodiments of the present invention；
Fig. 4 is the relation schematic diagram of the reluctance torque of permanent-magnet synchronous reluctance motor according to embodiments of the present invention and l/w；
Fig. 5 is the relation schematic diagram of reluctance torque, electromagnetic torque, total torque and current phase；
Fig. 6 is the longitudinal sectional view of compressor according to embodiments of the present invention.
Reference:
Permanent-magnet synchronous reluctance motor 100；
Stator 1；
Stator inner hole 11；Stator slot 12；Stator coil 13；Stator tooth 14；
Rotor 2；
Rotor inner hole 21；Mounting groove 22；First magnet slot 221；Second magnet slot 222；Passage 23；
Permanent magnet 3；First magnet 31；Second magnet 32；
Rotary shaft 200；The pump housing 300；Closed container 400；Suction line 500；Discharge pipe 600；
Cylinder 700；Eccentric shaft 800；Reservoir 900
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has 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 describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " on ", D score,
The orientation of instruction such as " interior ", " outward ", " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship be based on
Orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplify description, rather than instruction or hint institute
The device referring to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
Bright restriction.Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint are relatively important
Property or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Person implicitly includes one or more this feature.In describing the invention, unless otherwise stated, " multiple " are meant that
Two or more.
In describing the invention, it should be noted that 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 is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Referring initially to Fig. 6, compressor according to embodiments of the present invention is described below.
As shown in fig. 6, compressor according to embodiments of the present invention includes: compressor pump 300, permanent-magnet synchronous reluctance motor
100th, reservoir 900 etc. is constituted.Permanent-magnet synchronous reluctance motor 100 includes stator 1 and rotor 2, and compressor pump 300 and permanent magnetism are same
Step reluctance motor 100 is located in closed container 400.Suction line 500 and discharge pipe 600, reservoir are provided with closed container 400
900 separate cooling medium (such as refrigerant gas) and lubricating oil.By the detached cooling medium of reservoir 900, via suction line
500 return to compressor pump 300.
The eccentric rotor 20 that compressor pump 300 has cylinder 19, driven by rotary shaft 21.Compressor pump 300 passes through
The rotation of eccentric shaft 800, the cooling medium that compression sucks from suction line 500 in cylinder 19.Compress through compressor pump 300
Cooling medium, by the path (groove, hole, otch) that formed on the stator 1 of permanent-magnetic electric machine, formed on rotor 2 logical
Gap between pore 23, stator 1 and rotor 2 etc., discharges from discharge pipe 600.
Describe a kind of permanent-magnet synchronous reluctance motor of embodiment according to a first aspect of the present invention below with reference to Fig. 1-Fig. 3 in detail
100.
Permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention, comprising: stator 1 and rotor 2, as shown in figure 1, fixed
Son 1 has stator inner hole 11 and the multiple stator slots 12 around stator inner hole 11, and in example as shown in Figure 1, stator slot 12 is
24, and stator coil 13 is 24.
Between two neighboring stator slot 12, there is stator tooth 14, alternatively, stator tooth 14 is parallel teeth.In stator slot 12 around
It is formed with stator coil 13.Rotor 2 is rotatably provided in stator inner hole 11, and rotor 2 has rotor inner hole 21 and along rotor inner hole
21 circumferentially disposed multigroup mounting grooves 22, every group of mounting groove 22 includes multiple mounting grooves 22 of radially spaced arrangement for putting
Put permanent magnet 3.Such as permanent magnet 3 can be rare-earth Nd-Fe-B permanent magnet 3.Alternatively, as shown in Figure 1-Figure 3, the horizontal stroke of permanent magnet 3
Section is formed as rectangle.
As Figure 1-Figure 2, in permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention, by permanent magnet 3
The heart is connected to form d axle with the center of rotor inner hole 21, and turning 90 degrees electrical angle from d direction of principal axis is q axle, wherein inductance ld and q of d axle
The inductance lq of axle is different.Therefore, therefore in addition to the electromagnetic torque that permanent magnet produces, also create reluctance torque, total torque t table
It is shown as:
T=pn × [ψ a × lq+ (ld-lq) × ld × lq] (1)
Wherein, pn represents number of pole-pairs, and ψ a represents d axle magnetic flux, and ld represents d axle inductance, and lq represents q axle inductance, and iq represents q
Shaft current, id represents d shaft current.Equation (1) represents the voltage equation after dq conversion, and wherein Section 1 is basic electromagnetic torque
pn*ψa*iq；Section 2 is reluctance torque pn* (ld-lq) * id*iq.
Fig. 5 is illustrated that current value keeps a timing electromagnetic torque, reluctance torque and total turn when current phase changes
The relation of square.As seen from Figure 5, when current phase reaches certain value, the total torque of motor output can reach maximum.
In consideration of it, in permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention, the width w of stator tooth 14, adjacent
Relation between beeline l between two groups of mounting grooves 22 meets:
1 ＜ l/w ＜ 1.5.
So, with reference to Fig. 3 thus it is shown that the armature of permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention is counter makees
Use magnetic flux schematic diagram, by the gap length of reasonable Arrangement q axle side, to make armature reaction magnetic flux be easy to pass through, so just
Larger armature reaction magnetic flux can be produced with less armature supply, by effectively utilizing reluctance torque, using the teaching of the invention it is possible to provide
A kind of motor having larger output torque.With reference to Fig. 4, Fig. 4 is illustrated that permanent-magnet synchronous magnetic resistance electricity according to embodiments of the present invention
The reluctance torque of machine 100 and l/w relation schematic diagram, when 1 < l/w, < when 1.5, the reluctance torque of motor is maximum.
Thus, permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention, can increase reluctance torque while,
Increase the electromagnetic torque of motor, improve the efficiency of motor.In addition, the compressor carrying after this motor has high apf efficiency.
According to one embodiment of present invention, as depicted in figs. 1 and 2, each mounting groove 22 is formed as substantially u shape shape,
And include the first magnet slot 221 and two the second magnet slot 222, the first magnet slot 221 adjacent rotor endoporus 21, the first magnet slot
Setting the first magnet 31 in 221, the second magnet slot 222 is all connected with the first magnet slot 221, and two from the first magnet slot 221
End extends away from rotor inner hole 21, all places the second magnet 32 in the second magnet slot 222.Wherein, two adjacent groups mounting groove 22 it
Between beeline l be the distance between second adjacent magnet slot 222 between two adjacent groups.
Thus, by arranging the second adjacent magnet that mounting groove 22 is substantially between u shape shape, and setting two adjacent groups
The relation 1 ＜ l/w ＜ 1.5 of the width w of the distance between groove 222 l and stator tooth 14 so that while increasing reluctance torque,
Also further increase the electromagnetic torque of motor, thus further increasing the efficiency of motor
Alternatively, the first magnet 31 and the second magnet 32 positioned at its both sides are all spaced apart in processing and manufacturing.As figure
Shown in 1 and Fig. 2, the second magnet slot 222 extends to the outward flange of adjacent rotor 2.
According to one embodiment of present invention, in every group of mounting groove 22, the first magnet slot 221 of two neighboring mounting groove 22
The distance between be t1, the distance between corresponding second magnet slot 222 be t2, wherein, t1≤t2, t2=w.Thus, not only
Processing is simple and convenient, and can also further increase reluctance torque and electromagnetic torque.
In an alternate embodiment of the present invention where, mounting groove 22 is included along circumferentially disposed four groups of rotor inner hole 21.By
This is easy to process, structure is simple.
Below with reference to Fig. 1-Fig. 3, the permanent-magnet synchronous reluctance motor 100 according to one specific embodiment of the present invention is described.
As depicted in figs. 1 and 2, permanent-magnet synchronous reluctance motor 100 according to embodiments of the present invention, comprising: stator 1 and rotor
2, stator 1 has stator inner hole 11 and 24 stator slots 12 around stator inner hole 11, has between two neighboring stator slot 12
Stator tooth 14, stator tooth 14 is parallel teeth.
Rotor 2 is rotatably provided in stator inner hole 11, and rotor 2 has rotor inner hole 21 and sets along rotor inner hole 21 circumference
The four groups of mounting grooves 22 put, every group of mounting groove 22 includes two mounting grooves 22 of radially spaced arrangement for placing permanent magnet
3, wherein permanent magnet 3 can be rare-earth Nd-Fe-B permanent magnet 3, and the cross section of permanent magnet 3 is formed as rectangle.
Each mounting groove 22 is formed as substantially u shape shape, and includes the first magnet slot 221 and two the second magnet slot 222,
First magnet slot 221 adjacent rotor endoporus 21, setting the first magnet 31 in the first magnet slot 221, the second magnet slot 222 is all with the
One magnet slot 221 connects, and extends away from rotor inner hole 21 from the two ends of the first magnet slot 221, all puts in the second magnet slot 222
Put the second magnet 32.Wherein, the width of the distance between second adjacent magnet slot 222 between two adjacent groups l and stator tooth 14
The relation 1 ＜ l/w ＜ 1.5 of degree w.
As shown in Fig. 2 in every group of mounting groove 22, the distance between first magnet slot 221 of two neighboring mounting groove 22 is
T1, the distance between corresponding second magnet slot 222 is t2, wherein, t1≤t2, t2=w.
Permanent-magnet synchronous reluctance motor according to embodiments of the present invention, by effectively utilizing reluctance torque, and makes this permanent magnetism
Synchronous magnetic resistance motor obtains larger output torque, and the efficiency of lifting motor.
A kind of compressor of embodiment according to a second aspect of the present invention, including according to above-mentioned first aspect embodiment forever
Magnetic-synchro reluctance motor.Other of compressor according to embodiments of the present invention constitute and operate for ordinary skill people
It is all known for member, be not detailed herein.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features, the knot describing with reference to this embodiment or example
Structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, to above-mentioned term
Schematic representation is not necessarily referring to identical embodiment or example.And, the specific features of description, structure, material or spy
Point can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
Multiple changes, modification, replacement and modification can be carried out to these embodiments in the case of the principle of the disengaging present invention and objective, this
The scope of invention is limited by claim and its equivalent.
Claims (7)
1. a kind of permanent-magnet synchronous reluctance motor is it is characterised in that include:
Stator, described stator has stator inner hole and the multiple stator slots around described stator inner hole, two neighboring stator slot it
Between there is stator tooth, be wound with stator coil in described stator slot；
Rotor, described rotor is rotatably provided in described stator inner hole, and described rotor has rotor inner hole and along described rotor
The circumferentially disposed multigroup mounting groove of endoporus, mounting groove described in every group includes multiple mounting grooves of radially spaced arrangement for putting
Put permanent magnet, the wherein width w of stator tooth, the relation between beeline l between mounting groove described in two adjacent groups meet:
1 ＜ l/w ＜ 1.5；
Each described mounting groove is formed as substantially u shape shape, and includes: the first magnet slot, described first magnet slot is adjacent to described
Rotor inner hole, setting the first magnet in described first magnet slot；Article two, the second magnet slot, described second magnet slot is all with described
One magnet slot connection, and extend away from described rotor inner hole from the two ends of described first magnet slot, in described second magnet slot all
Place the second magnet, described first magnet and the second magnet positioned at its both sides are all spaced apart；Wherein, described in described two adjacent groups
Beeline l between mounting groove is the distance between second adjacent magnet slot between two adjacent groups；
In every group of mounting groove, the distance between first magnet slot of two neighboring mounting groove be t1, corresponding second magnet slot it
Between distance be t2, wherein, t1≤t2, t2=w.
2. permanent-magnet synchronous reluctance motor according to claim 1 it is characterised in that described second magnet slot extend to neighbouring
The outward flange of described rotor.
3. permanent-magnet synchronous reluctance motor according to claim 1 is it is characterised in that described mounting groove is included along described rotor
Circumferentially disposed four groups of endoporus.
4. permanent-magnet synchronous reluctance motor according to claim 1 it is characterised in that described permanent magnet be rare-earth Nd-Fe-B forever
Magnet.
5. permanent-magnet synchronous reluctance motor according to claim 4 is it is characterised in that the cross section of described permanent magnet is formed as
Rectangle.
6. permanent-magnet synchronous reluctance motor according to claim 1 is it is characterised in that described stator slot is 24 and described
Stator coil is 24.
7. a kind of compressor is it is characterised in that include the permanent-magnet synchronous magnetic resistance electricity according to any one of claim 1-6
Machine.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410243253.1A CN104052227B (en) | 2014-06-03 | 2014-06-03 | Permanent magnet synchronous reluctance motor and compressor with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410243253.1A CN104052227B (en) | 2014-06-03 | 2014-06-03 | Permanent magnet synchronous reluctance motor and compressor with same |
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| CN104052227A CN104052227A (en) | 2014-09-17 |
| CN104052227B true CN104052227B (en) | 2017-01-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108448774B (en) * | 2018-04-27 | 2019-12-03 | 江苏大学 | A kind of permanent magnetism assist in synchronization reluctance motor modularization Winding Design method of high fault tolerance |
| CN108988527A (en) * | 2018-06-27 | 2018-12-11 | 德威(苏州)新能源有限公司 | A kind of composite excitation high power density magnetic resistance permanent magnet machine rotor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761221A (en) * | 2012-03-05 | 2012-10-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronous reluctance motor and mounting method thereof |
| CN202513790U (en) * | 2012-03-05 | 2012-10-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronous reluctance motor and compressor comprising the same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5523637A (en) * | 1994-04-28 | 1996-06-04 | Ford Motor Company | Permanent magnet electrical machine with low reluctance torque |
| JP2001333553A (en) * | 2000-05-19 | 2001-11-30 | Fujitsu General Ltd | Permanent magnet motor |
| JP4447278B2 (en) * | 2003-10-15 | 2010-04-07 | アイチエレック株式会社 | Permanent magnet embedded motor |
| CN203911711U (en) * | 2014-06-03 | 2014-10-29 | 广东美芝制冷设备有限公司 | Permanent magnet synchronous reluctance motor and compressor having same |
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2014
- 2014-06-03 CN CN201410243253.1A patent/CN104052227B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761221A (en) * | 2012-03-05 | 2012-10-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronous reluctance motor and mounting method thereof |
| CN202513790U (en) * | 2012-03-05 | 2012-10-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet auxiliary synchronous reluctance motor and compressor comprising the same |
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