CN107332412A - A kind of square induction-type bearingless motor of stator - Google Patents
A kind of square induction-type bearingless motor of stator Download PDFInfo
- Publication number
- CN107332412A CN107332412A CN201710467305.7A CN201710467305A CN107332412A CN 107332412 A CN107332412 A CN 107332412A CN 201710467305 A CN201710467305 A CN 201710467305A CN 107332412 A CN107332412 A CN 107332412A
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- stator
- vat
- square
- bracket groove
- suspending windings
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/12—Asynchronous induction motors for multi-phase current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/12—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors arranged in slots
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
Abstract
The present invention discloses a kind of square induction-type bearingless motor of stator of use magnetic bearing supporting, the external wall cross-section of square shaped stator is square, 24 stator slots evenly distributed in the circumferential direction on square shaped stator, 24 stator slots are made up of 8 identical vats, 8 identical bracket grooves, 8 identical sulculuses；Vat, bracket groove, sulculus are each arranged symmetrically per one group two-by-two relative to square diagonal, and vat is near diagonal positions, and centre is bracket groove, and small slot distance diagonal is farthest；The internal layer that the internal layer being provided with each sulculus in sulculus torque winding, each bracket groove is provided with provided with bracket groove torque winding, outer layer in bracket groove suspending windings, each vat is provided with vat torque winding, outer layer and is provided with vat suspending windings；The present invention can make full use of square silicon steel raw material, further reduce the size of bearing-free motor so that critical speed is further enhanced, it is ensured that the normal output torque and power density of induction-type bearingless motor.
Description
Technical field
The invention belongs to electric-driving installation field, a kind of induction-type bearingless motor of use magnetic bearing supporting is refered in particular to.
Background technology
Induction-type bearingless motor mainly using magnetic bearing support, long lifespan, without mechanical friction and wear, need not lubrication, also
Higher rotating speed and powerful limitation are broken through, the application of high-speed electric expreess locomotive has been widened.Induction-type bearingless motor is by stator, rotor
With winding composition, fluting, which is formed, on stator suspending windings in stator poles, stator slot, radial suspension uses radial suspension winding
It is laminated in groove.The stator of current induction-type bearingless motor is circle, and stator is in punching process, all will be square
Silicon steel sheet makes circular configuration, and square corner is wasted, it is impossible to be utilized effectively；Stator is its suspension of circular motor
Although winding is not take up extra axial space, but occupies motor slot space so that the temperature rise of motor, power density ratio
Common electric machine power density with rotating speed is low.
The content of the invention
The purpose of the present invention is to solve the problem of induction-type bearingless motor that existing stator is circle is present, and it is a kind of fixed to propose
The square induction-type bearingless motor of son, the stator design of the motor is square, not only processes simple, and can further improve work(
Rate density.
To achieve the above object, a kind of technical scheme of the square induction-type bearingless motor use of stator of the invention is：Bag
Include and square shaped stator is coaxially cased with outside rotor core and stator, rotor core, the external wall cross-section of square shaped stator is square, square
24 stator slots evenly distributed in the circumferential direction on stator, 24 stator slots be by 8 identical vats, 8 identical bracket grooves,
8 identical sulculus compositions；Vat, bracket groove, sulculus are each arranged symmetrically per one group two-by-two relative to square diagonal,
Vat is near diagonal positions, and centre is bracket groove, and small slot distance diagonal is farthest；In each sulculus provided with sulculus torque around
Internal layer in group, each bracket groove is provided with provided with the internal layer that bracket groove torque winding, outer layer are provided with bracket groove suspending windings, each vat
Vat torque winding, outer layer are provided with vat suspending windings.
Further, square two diagonal of square shaped stator is respectivelyxAxle andyAxle, fromxAxle positive direction starts edge
Counterclockwise, vat torque winding, bracket groove torque winding and sulculus torque winding sequentially according to B+, B+, A-, A-, C+, C+,
B-, B-, A+, A+, C-, C-, B+, B+, A-, A-, C+, C+, B-, B-, A+, A+, C-, C- order are distributed；Vat suspending windings and
Bracket groove suspending windings in the counterclockwise direction sequentially according to X+, X+, Y+, Y+, Y+, Y+, X-, X-, X-, X-, Y-, Y-, Y-, Y-, X+,
X+ orders are distributed.
Further,xOne group of vat suspending windings of axle positive direction both sides andxOne group of bracket groove of axle positive direction both sides is hanged
The winding direction of floating winding is identical, but andxOne group of vat suspending windings of axle negative direction both sides and one group of bracket groove suspending windings
Winding direction is opposite；yOne group of vat suspending windings of axle positive direction both sides andyOne group of bracket groove suspending windings of axle positive direction both sides
Winding direction it is identical, but andyOne group of vat suspending windings of axle negative direction both sides and one group of bracket groove suspending windings around prescription
To opposite.
Further, 24 stator slot shapes are into 24 stator tooths, and the teeth portion width of each stator tooth is equal, each stator
The trench bottom of groove is equal apart from the beeline of stator outer wall.
The present invention can make full use of square silicon steel raw material to make stator, further reduce the size of bearing-free motor,
So that critical speed is further enhanced, it is ensured that the normal output torque and power density of induction-type bearingless motor.Relatively
In traditional induction-type bearingless motor, the power density of motor is improved, bearing-free motor power density ratio is solved general with rotating speed
The problem of three-way motor is low.
Brief description of the drawings
Fig. 1 is a kind of square induction-type bearingless motor structural front view of stator of the invention；
Fig. 2 is that the present invention exists shown in Fig. 1xThe radial suspension force of direction of principal axis produces schematic diagram；
Fig. 3 is that the present invention exists shown in Fig. 1yThe radial suspension force of direction of principal axis produces schematic diagram；
In figure：1. square shaped stator；2. rotor core；3. rotating shaft；7. rotor bar；8. rotor slot；11. vat；12. bracket groove；13.
Sulculus；41. bracket groove suspending windings；51. vat suspending windings；61. vat torque winding；62. bracket groove torque winding；63. sulculus
Torque winding.
Embodiment
Referring to Fig. 1, centre of the invention is rotating shaft 3, and rotating shaft 3 is outer to be coaxially fixed with outside rotor core 2, rotor core 2
Square shaped stator 1 coaxially is cased with, radial clearance is left between rotor core 2 and square shaped stator 1.The external wall cross-section of square shaped stator 1
It is square, endoporus is circular, is radial clearance between inner hole wall and the outer wall of rotor core 2.
Respectively there is circular arc chamfering at the square corner of square shaped stator 1.Square shaped stator 1 is formed provided with 24 stator slots
24 stator tooths.This 24 stator slots are evenly distributed in the circumferential direction, and the angle between two neighboring stator groove center is 15 degree.
24 stator slots are made up of 8 identical vats 11,8 identical bracket grooves 12,8 identical sulculuses 13.8 identicals are big
Per one group two-by-two in groove 11, and it is arranged symmetrically relative to the diagonal of square, per one group two-by-two in 8 identical bracket grooves 12,
And be arranged symmetrically relative to the diagonal of square, per one group two-by-two in 8 identical sulculuses 13, and relative to pair of square
Linea angulata is arranged symmetrically.Wherein, vat 11 is near the diagonal positions of square, and secondly, centre is bracket groove 12, the distance of sulculus 13
The diagonal of square is farthest.
Vat 11, bracket groove 12 need the teeth portion width for ensureing each stator tooth equal with the groove width of sulculus 13, vat 11, in
The groove depth of groove 12 and sulculus 13 needs to ensure that the beeline of the outer wall of each slot distance square shaped stator 1 is equal, i.e., 24 fixed
The trench bottom of pilot trench is equal apart from the beeline of stator outer wall.Due to determining at cornerwise position of square
The distance between sub- endoporus and stator outer wall is bigger, so the width of the trench bottom of vat 11 is more than the width of the trench bottom of bracket groove 12,
The groove depth of vat 11 is more than the groove depth of bracket groove 12, and the width of the trench bottom of bracket groove 12 is more than the width of the trench bottom of sulculus 13, bracket groove 12
Groove depth be more than sulculus 13 groove depth.
Be provided with each sulculus 13 internal layer in sulculus torque winding 63, each bracket groove 12 provided with bracket groove torque winding 62,
The internal layer that outer layer is provided with bracket groove suspending windings 41, each vat 11 suspends provided with vat torque winding 61, outer layer provided with vat
Winding 51.Sulculus torque winding 63, bracket groove torque winding 62 are identical with the number of turn of vat torque winding 61, it is ensured that motor is normally defeated
Go out torque and power density.
Vat 11 is distributed the number of turn of vat suspending windings 51 according to the remaining space size of vat torque winding 61,
Bracket groove 12 is distributed bracket groove suspending windings 41, vat suspending windings 51 according to the remaining space size of bracket groove torque winding 62
Turn ratio bracket groove suspending windings 41 the number of turn it is many.
Fixation is embedded with one in 19 rotor slots 8 evenly distributed in the circumferential direction, each rotor slot 8 on rotor core 2
Rotor bar 7, rotor bar 7 is the structure of mouse-cage type, and material is copper.
The pole for the stator torque winding being made up of vat torque winding 61, bracket groove torque winding 62 and sulculus torque winding 63
Logarithm is 2, turns to 2 pairs of poles according to the pole pitch of 24 groove of machine winding 4 for 6 scheme, it is 2 that rotor bar 7, which induces number of pole-pairs,
To pole, levitation force winding number of pole-pairs is 1, meets the relation that levitation force winding number of pole-pairs is equal to torque winding number of pole-pairs ± 1.When fixed
Sub- torque winding leads to three-phase alternating current using inverter power supply, then suspending windings lead to the electric current of identical frequency and change phase
To suspending power.
Referring to Fig. 2 and Fig. 3, if square two diagonal of square shaped stator 1 is respectivelyxAxle andyUpper right in axle, Fig. 2
Angular direction isxAxle positive direction, upper left angular direction isyAxle positive direction.FromxAxle positive direction starts, in the counterclockwise direction, 24 stators
A, B, the C for the stator torque winding being made up of in groove vat torque winding 61, bracket groove torque winding 62 and sulculus torque winding 63
Phase three-phase sequentially according to B+, B+, A-, A-, C+, C+, B-, B-, A+, A+, C-, C-, B+, B+, A-, A-, C+, C+, B-, B-, A+,
A+, C-, C- order are distributed, and the torque winding in each stator slot is that the Double Layer Winding in Double Layer Winding, each stator slot is
Equidirectional winding, band "+" represent torque winding outside in face around, band "-" represent torque winding inside-out face around.
xOne group of He of vat suspending windings 51 of axle positive direction both sidesxOne group of bracket groove suspending windings 41 of axle positive direction both sides
Winding direction it is identical, but andxOne group of vat suspending windings 51 of axle negative direction both sides and one group of bracket groove suspending windings 41 around
Group is in opposite direction.xTwo groups of vat suspending windings 51 of direction of principal axis both sides and two groups of bracket groove suspending windings 41 are X suspending windings.Together
Reason,yTwo groups of bracket groove suspending windings 41 of direction of principal axis both sides and two groups of vat suspending windings 51 are Y suspending windings,yAxle positive direction
One group of He of vat suspending windings 51 of both sidesyThe winding direction of one group of bracket groove suspending windings 41 of axle positive direction both sides is identical, but
WithyOne group of vat suspending windings 51 of axle negative direction both sides and the winding direction of one group of bracket groove suspending windings 41 are opposite.By vat
The suspending windings that suspending windings 51 and bracket groove suspending windings 41 are constituted, in the counterclockwise direction sequentially according to X+, X+, Y+, Y+, Y+, Y
+, X-, X-, X-, X-, Y-, Y-, Y-, Y-, X+, X+ order be distributed.
During present invention work, referring to Fig. 2 and Fig. 3, winding A, B, C phase optimizing phase is as follows：A phase windings optimizing phase 180
Degree, 60 degree of B phase windings optimizing phase, C phase windings optimizing phase -60 is spent, B+ energizations direction for+, B- energizations direction be negative, and C+ is logical
Electric direction is negative, and C- energizations direction is just, B phases and C phase torques winding produces magnetic flux, magnetic flux, magnetic fluxAround closex
Axle positive direction and negative 2 reverse vats 11,2 bracket grooves 12 are distributed clockwise, and around closeyAxle is forward and reverse and negative reverse 2
Individual vat 11,2 bracket grooves 12 are distributed counterclockwise.In figs. 2 and 3, in the case that holding torque winding generation magnetic flux is constant, change
Become the electrical current size and phase of X suspending windings and Y suspending windings, the suspending power in different size and direction can be producedF x WithF y 。
Change suspending powerF x Size and positive and negative principle be：Such as Fig. 2,90 degree of the X phases phase of suspending windings, winding X+ leads to
Electric direction is just, winding X- energizations direction is negative, and suspending windings produce magnetic flux, magnetic fluxAroundx2 vats of axle positive direction
11st, 2 bracket grooves 12 are distributed clockwise, magnetic fluxAroundx2 vats 11 of axle negative direction, 2 bracket grooves 12 are distributed counterclockwise, simultaneously
Motor torque winding produces magnetic fluxDirection existxAxle positive direction and negative direction are distribution clockwise, suspending windings and torque
After the magnetic flux superposition that winding is produced,yThe magnetic flux of axle positive direction is strengthened,xThe magnetic flux of axle negative direction weakens, and produces electromagnetic attractionF x1、F x2、F x3、F x4.xThe electromagnetic attraction of axle negative direction is cancelled out each other, and synthesis electromagnetic attraction existsxAxle positive direction, so as to generatexThe radial suspension force of axle positive direction.Similarly, when X phases are powered reverse, flow direction is produced with such as the magnetic flux in Fig. 2Direction
On the contrary, torque winding flow direction is constant, after the magnetic flux superposition of suspending windings and torque winding,xThe magnetic flux of axle positive direction subtracts
It is weak,xThe magnetic flux of axle negative direction is strengthened, so as to producexThe radial suspension force of axle negative direction.
Change suspending powerF y Size and positive and negative principle be：Such as Fig. 3,270 degree of the Y phases phase of suspending windings, Y+ is powered
Direction is negative, and Y- energizations direction is just, suspending windings produces magnetic flux, magnetic fluxAroundy2 vats 11 of axle positive direction, 2
Bracket groove 12 is distributed counterclockwise, magnetic fluxAroundy2 vats 11 of axle negative direction, 2 bracket grooves 12 are distributed clockwise, while motor turns
Square winding produces magnetic fluxDirection existyAxle positive direction and the magnetic that negative direction is distribution counterclockwise, suspending windings and torque winding
After logical superposition, such as Fig. 3 existsyThe magnetic flux of axle positive direction is strengthened,yThe magnetic flux of axle negative direction weakens, and produces electromagnetic attractionF y1、F y2、F y3、F y4.xDirection of principal axis electromagnetic attraction is cancelled out each other, and synthesis electromagnetic attraction existsyAxle positive direction, so as to generateyAxle positive direction
Radial suspension force.Similarly, when suspending windings Y phases are powered reverse, magnetic flux in the magnetic flux and Fig. 3 of generationIn the opposite direction, torque
Winding flow direction is constant, after the magnetic flux superposition of suspending windings and torque winding,yThe magnetic flux of axle positive direction weakens,yAxle losing side
To magnetic flux strengthen, so as to produceyThe radial suspension force of axle negative direction.
Rotor core 2 existsxDirection of principal axis X suspending windings there are not in the case of energization, in equilbrium position.If rotor core 2 is by outer
Disturb power effect deviationxAxle negative direction, then suspending windings X windings energization produces the magnetic flux in Fig. 2, magnetic flux superposition after, torque around
Group magnetic fluxWith suspending windings magnetic fluxProducingxAxle positive direction is strengthened,xAxle negative direction is slackened,xWhat axle positive direction was strengthened
Direction produces suction and made a concerted effortF x , you can allow rotor core 2 to return to equilbrium position.Similarly, when rotor core 2 is acted on partially by outer power of disturbing
ToxEnergization direction changes in axle positive direction, suspending windings X windings, producesxThe suction of axle negative direction is made a concerted effortF x , you can allow rotor
Iron core 2 returns to equilbrium position.If rotor is disturbed power effect deviation by outeryAxle negative direction, then suspending windings Y windings energization production in Fig. 3
Magnetisation leads to, after magnetic flux superposition, torque winding magnetic fluxWith suspending windings magnetic flux yAxle positive direction is strengthened,yAxle is born
Direction is slackened,yThe direction that axle positive direction is strengthened produces suction and made a concerted effortF y , you can allow rotor core 2 to return to equilbrium position.Together
Reason, if rotor is disturbed power effect deviation by outeryAxle positive direction, then be powered according to suspending windings Y windings opposite direction in Fig. 3, producesyAxle
The suction of negative direction is made a concerted effortF y , you can allow rotor core 2 to return to equilbrium position.Stator torque winding is in the constant situation that is powered
Under, by the size and the energization direction that change suspending windings X windings and suspending windings Y winding currents, it is possible to achieve any direction
Suspending power, overcome the disturbance of any direction to return to equilbrium position.
Claims (6)
1. a kind of square induction-type bearingless motor of stator, including rotor core（2）And stator, it is characterized in that：Rotor core（2）
Coaxially it is cased with square shaped stator outside（1）, square shaped stator（1）External wall cross-section be square, square shaped stator（1）On along the circumferential direction
24 stator slots are evenly arranged, 24 stator slots are by 8 identical vats（11）, 8 identical bracket grooves（12）, 8 it is identical
Sulculus（13）Composition；Vat（11）, bracket groove（12）, sulculus（13）Each per two-by-two one group relative to square diagonal
It is arranged symmetrically, vat（11）Near diagonal positions, centre is bracket groove（12）, sulculus（13）It is farthest apart from diagonal；Each
Sulculus（13）In be provided with sulculus torque winding（63）, each bracket groove（12）In internal layer be provided with bracket groove torque winding（62）, outer layer
Provided with bracket groove suspending windings（41）, each vat（11）In internal layer be provided with vat torque winding（61）, outer layer it is outstanding provided with vat
Floating winding（51）.
2. a kind of square induction-type bearingless motor of stator according to claim 1, it is characterized in that：Square shaped stator（1）'s
Square two diagonal be respectivelyxAxle andyAxle, fromxAxle positive direction starts in the counterclockwise direction, vat torque winding
（61）, bracket groove torque winding（62）With sulculus torque winding（63）Sequentially according to B+, B+, A-, A-, C+, C+, B-, B-, A+, A+,
C-, C-, B+, B+, A-, A-, C+, C+, B-, B-, A+, A+, C-, C- order are distributed；Vat suspending windings（51）Suspended with bracket groove
Winding（41）It is sequentially suitable according to X+, X+, Y+, Y+, Y+, Y+, X-, X-, X-, X-, Y-, Y-, Y-, Y-, X+, X+ in the counterclockwise direction
Sequence is distributed.
3. a kind of square induction-type bearingless motor of stator according to claim 2, it is characterized in that：xAxle positive direction both sides
One group of vat suspending windings（51）WithxOne group of bracket groove suspending windings of axle positive direction both sides（41）Winding direction it is identical, but
WithxOne group of vat suspending windings of axle negative direction both sides（51）With one group of bracket groove suspending windings（41）Winding direction it is opposite；yAxle
One group of vat suspending windings of positive direction both sides（51）WithyOne group of bracket groove suspending windings of axle positive direction both sides（41）Around prescription
To identical, but andyOne group of vat suspending windings of axle negative direction both sides（51）With one group of bracket groove suspending windings（41）Around prescription
To opposite.
4. a kind of square induction-type bearingless motor of stator according to claim 1, it is characterized in that：24 stator slot shapes into
24 stator tooths, the teeth portion width of each stator tooth is equal, the most short distance of the trench bottom of each stator slot apart from stator outer wall
From equal.
5. a kind of square induction-type bearingless motor of stator according to claim 1, it is characterized in that：Sulculus torque winding
（63）, bracket groove torque winding（62）With vat torque winding（61）The number of turn it is identical.
6. a kind of square induction-type bearingless motor of stator according to claim 5, it is characterized in that：Vat suspending windings
（51）Turn ratio bracket groove suspending windings（41）The number of turn it is many.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467305.7A CN107332412B (en) | 2017-06-20 | 2017-06-20 | A kind of induction-type bearingless motor that stator is rectangular |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467305.7A CN107332412B (en) | 2017-06-20 | 2017-06-20 | A kind of induction-type bearingless motor that stator is rectangular |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107332412A true CN107332412A (en) | 2017-11-07 |
| CN107332412B CN107332412B (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710467305.7A Expired - Fee Related CN107332412B (en) | 2017-06-20 | 2017-06-20 | A kind of induction-type bearingless motor that stator is rectangular |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022065345A1 (en) * | 2020-09-28 | 2022-03-31 | 株式会社小松製作所 | Stator and motor |
| WO2022113405A1 (en) * | 2020-11-26 | 2022-06-02 | 株式会社日立インダストリアルプロダクツ | Rotary electric machine and electric vehicle rotary electric machine system using same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022065345A1 (en) * | 2020-09-28 | 2022-03-31 | 株式会社小松製作所 | Stator and motor |
| WO2022113405A1 (en) * | 2020-11-26 | 2022-06-02 | 株式会社日立インダストリアルプロダクツ | Rotary electric machine and electric vehicle rotary electric machine system using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107332412B (en) | 2019-03-05 |
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