CN107425622A - A kind of permanent-magnetic electric machine with bearing of square shaped stator structure - Google Patents
A kind of permanent-magnetic electric machine with bearing of square shaped stator structure Download PDFInfo
- Publication number
- CN107425622A CN107425622A CN201710467338.1A CN201710467338A CN107425622A CN 107425622 A CN107425622 A CN 107425622A CN 201710467338 A CN201710467338 A CN 201710467338A CN 107425622 A CN107425622 A CN 107425622A
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- Prior art keywords
- stator
- sulculus
- vat
- square shaped
- square
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Classifications
-
- 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
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
The present invention discloses a kind of permanent-magnetic electric machine with bearing in electric driving controlgear field, Surface Mount is along the circumferential direction fixed on rotor core outer wall permanent magnet, square shaped stator is cased with outside permanent magnet, the external wall cross-section of square shaped stator is square, it is evenly distributed in the circumferential direction on square shaped stator to have 12 stator slots, 12 stator slots are made up of 8 identical vats and 4 identical sulculuses, 8 vats and 4 sulculuses are each symmetrical per the one group two-by-two diagonal relative to square, 8 vats are close to diagonal positions, and sulculus is away from diagonal；Be provided with sulculus torque winding in sulculus, the internal layer in vat is provided with suspending windings provided with vat torque winding, outer layer；The present invention can make full use of square silicon steel raw material to make stator, further reduce the size of motor, and critical speed further improves.
Description
Technical field
The invention belongs to electric driving controlgear field, refers in particular to a kind of bearing-free permanent magnet electricity using magnetic bearing supporting
Machine.
Background technology
Permanent-magnetic electric machine with bearing using magnetic bearing support, have long lifespan, without mechanical friction and wear, need not lubrication etc. spy
Point, breach higher rotating speed and powerful limitation.Permanent-magnetic electric machine with bearing is made up of stator, rotor, permanent magnet and winding,
Fluting forms stator poles on stator, has suspending windings in stator slot, is laminated to using radial suspension winding on stator winding, suspends
Although winding is not take up extra axial space, but occupy permanent magnet motor stator slot space so that the temperature liter of magneto
Height, the power density of magneto reduce.At present, the stator of permanent-magnetic electric machine with bearing is circle, and stator is processed in punching
Cheng Zhong, all it is that square silicon steel sheet is made into circular configuration, the corner for having part slatterns, it is impossible to is utilized effectively.
The content of the invention
The problem of existing present invention aim to address existing permanent-magnetic electric machine with bearing, propose it is a kind of it is simple and compact for structure,
The permanent-magnetic electric machine with bearing of the high square shaped stator structure of power density.
The technical solution adopted by the present invention is：Surface Mount is along the circumferential direction fixed on rotor core outer wall permanent magnet, permanent magnetism
External to be cased with square shaped stator, the external wall cross-section of square shaped stator is square, evenly distributed in the circumferential direction on square shaped stator to have
12 stator slots, 12 stator slots are made up of 8 identical vats and 4 identical sulculuses, and 8 vats and 4 sulculuses are each
Symmetrical per the one group two-by-two diagonal relative to square, 8 vats are close to diagonal positions, and sulculus is away from diagonal；
Be provided with sulculus torque winding in sulculus, the internal layer in vat is provided with suspending windings provided with vat torque winding, outer layer.
Further, the stator torque winding of vat torque winding and sulculus torque winding composition is left and right distribution mode
Double Layer Winding, square two diagonal are respectivelyxAxle andyAxle, fromyAxle positive direction starts in the counterclockwise direction, stator
Torque winding is sequentially winding A-, C-, C+, B+, B-, A-, A+, C+, C-, B-, B+, A+, A-, C-, C+, B+, B-, A-, A+, C
+、C-、B-、B+、A+；Suspending windings fromyAxle positive direction start be sequentially in the counterclockwise direction winding Y+, X-, X-, Y-, Y-, X+,
X+、Y+。
The present invention can make full use of square silicon steel raw material to make stator, further reduce the size of motor so that critical
Rotating speed is further enhanced so that such motor can be in wind-driven generator, high-speed machine tool, flywheel energy storage system and artificial satellite
Etc. being used widely in suspension support system.
Brief description of the drawings
Fig. 1 is a kind of structural front view of the permanent-magnetic electric machine with bearing of square shaped stator structure of the present invention；
Fig. 2 is winding distribution map of the present invention shown in Fig. 1；
The present invention shown in Fig. 3 Fig. 2 existsyThe radial suspension force in direction produces schematic diagram；
The present invention shown in Fig. 4 Fig. 2 existsxThe radial suspension force in direction produces schematic diagram；
In figure：1. square shaped stator；2. rotating shaft；3. positioning hole；4. stainless steel sleeve；5. suspending windings；7. rotor core；8. permanent magnetism
Body；11. vat；12. sulculus；61. vat torque winding；62. sulculus torque winding.
Embodiment
Referring to Fig. 1, centre of the invention is rotating shaft 2, and rotor core 7 is coaxially fixed with outside rotating shaft 2, rotor core 7
Surface Mount is along the circumferential direction fixed on outer wall the permanent magnets 8 of 4 identical arc-shapeds, the radial magnetizing of permanent magnet 8, it is two neighboring forever
The opposite polarity of the inner and outer end diametrically of magnet 8.One layer of stainless steel sleeve 4, stainless steel are fixed with outside 4 permanent magnets 8
Set 4 is used for reinforcing 4 permanent magnets 8 and rotor core 7.It is cased with square shaped stator 1 outside stainless steel sleeve 4, the outer wall of stainless steel sleeve 4 and square
Radial air gap is left between the endoporus of stator 1.
The external wall cross-section of square shaped stator 1 is square, and endoporus is circular.It is each at the square corner of square shaped stator 1
There is circular arc chamfering, positioning hole 3 is respectively opened on two diagonal of square, two positioning holes 3 are provided with each diagonal, it is fixed
Corresponding angular position of the position hole 3 close to square.
Square shaped stator 1 is provided with 12 stator slots, forms 12 stator tooths.This 12 stator slots along the circumferential direction uniform cloth
Put, the angle between two neighboring stator groove center is 30 degree.12 stator slots are by 8 identical vats 11 and 4 identicals
Sulculus 12 forms, and 8 vats 11 are symmetrical relative to diagonal per one group two-by-two, and 4 sulculuses are also per one group two-by-two, relatively
Symmetrical in diagonal, 8 vats 11 are close to diagonal positions, and sulculus 12 is away from diagonal.
The groove width of vat 11 and sulculus 12 needs to ensure the teeth portion width all same of 12 stator tooths, vat 11 and sulculus 12
It is equal with the beeline of the outer wall of square shaped stator 1, that is, the trench bottom of vat 11 and sulculus 12 is apart from square shaped stator 1
The distance of outer wall is equal.Because the metric space closer to cornerwise opening position stator inner hole and stator outer wall is bigger, institute
It is greater than the groove depth of sulculus 12 with the groove depth of vat 11, the groove bottom width of vat 11 is greater than the groove bottom width of sulculus 12.
Sulculus torque winding 62 is provided with sulculus 12.Internal layer in vat 11 is provided with vat torque winding 61, vat 11
In outer layer be provided with suspending windings 5, the remaining space after vat torque winding 61 is removed in vat 11 and places suspending windings 5, is hanged
Floating winding 5 is arranged in the vat 11 on the bigger diagonal both sides in space, is not take up the space of vat torque winding 61, can be carried
The power density of high motor.Vat torque winding 61 and sulculus torque winding 62 form stator torque winding, using it is double-deck around
Group, Double Layer Winding are left and right distribution mode.
Referring to Fig. 2, square two diagonal for defining square shaped stator 1 is respectivelyxAxle andyAxle, right direction arexAxle is just
Direction, top areyAxle positive direction.The stator torque winding being made up of vat torque winding 61 and sulculus torque winding 62, A, B, C
Three-phase torque winding is A+, A-, B+, B-, C+ and C- respectively.FromyAxle positive direction starts in the counterclockwise direction, and torque winding is sequentially
It is winding A-, C-, C+, B+, B-, A-, A+, C+, C-, B-, B+, A+, A-, C-, C+, B+, B-, A-, A+, C+, C-, B-, B+, A
+.In Fig. 2, band "+" represent winding outside in face around, band "-" represent winding inside-out face around.It is defined onxDirection of principal axis both sides
Two groups of suspending windings 5 be X suspending windings,xOne group of suspending windings 5 of axle positive direction both sides are samexAxle side negative sense both sides it is another
The winding direction of group suspending windings 5 is opposite.It is defined onyTwo groups of suspending windings 5 of direction of principal axis both sides are Y suspending windings,yAxle is square
One group of suspending windings 5 to both sides are sameyThe winding direction of another group of suspending windings 5 of positive negative direction both sides is opposite.8 vats 11
In suspending windings 5, fromyAxle positive direction starts to be sequentially winding Y+, X-, X-, Y-, Y-, X+, X+, Y+ in the counterclockwise direction.
The number of pole-pairs of torque winding is 2, and 2 pairs of poles are turned to according to the scheme that the pole pitch of 12 groove 4 is 1.The number of pole-pairs of permanent magnet 8
Equal with torque winding number of pole-pairs, the number of pole-pairs of suspending windings 5 is 1, and it is extremely right to meet that levitation force winding number of pole-pairs is equal to torque winding
The relation of number ± 1.When torque winding leads to three-phase alternating current using inverter power supply, then suspending windings X and Y leads to identical frequency
Electric current obtains the suspending power of radial direction with phase is changed.
As shown in Figure 3 and Figure 4, the sulculus torque winding 62 arranged in sulculus 12, the vat torque arranged in vat 11 around
Group 61, A, B, C the three-phase optimizing phase for the torque winding being made up of vat torque winding 61 and sulculus torque winding 62 are as follows：A
Phase winding optimizing phase 180 degree, 60 degree of B phases phase, C phases phase -60 spend, B+ energizations direction for+, B- energizations direction is negative, C+
Energization direction is negative, and C- energizations direction is just, winding B and C produces magnetic flux, magnetic fluxDirection as shown in figure Fig. 3 and Fig. 4,
Magnetic flux caused by permanent magnet 8 and torque winding produce magnetic fluxDirection is identical.Holding torque winding produces the constant situation of magnetic flux
Under, different size and positive and negative suspending power can be produced by changing suspending windings X and Y electrical current size and phaseF x WithF y 。
Change suspending powerF y Size and positive and negative principle be：As shown in figure 3, A phase winding optimizing phase 180 degrees, B phase phases
60 degree, C phases phase -60 spend, B+ energizations direction for+, B- energizations direction be it is negative, C+ energizations direction be it is negative, C- energizations direction be just,
Torque winding B and C produce magnetic flux, magnetic fluxDirection existsyAxle positive and negative direction aroundy2 in axle positive direction and negative direction
Individual 11,2 sulculuses 12 of vat are formed clockwise.90 degree of suspending windings Y phases phase, Y+ energizations direction are just Y- energization sides
To be negative, suspending windings produce magnetic flux, magnetic flux yAxle positive direction direction is around 2 vats, 11,2 up times of sulculus 12
Pin direction,yAxle negative direction direction is around the counter clockwise direction of 2 vats, 11,2 sulculuses 12.Torque winding magnetic flux and suspend around
After group produces magnetic flux superposition,yThe 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 is square
To radial suspension force.Similarly, when suspending windings Y is powered reverse, suspending windings generation flow direction is reverse, magnetic fluxDirection
With in Fig. 3 on the contrary, torque winding flow direction is constant, after the superposition of two magnetic fluxs,yThe magnetic flux of axle positive direction weakens,yAxle negative direction
Magnetic flux strengthen, so as to produceyThe radial suspension force of axle negative direction.
Change suspending powerF x Size and positive and negative principle be：As shown in figure 3, A phase winding optimizing phase 180 degrees, B phase phases
60 degree, C phases phase -60 spend, B+ energizations direction for+, B- energizations direction be it is negative, C+ energizations direction be it is negative, C- energizations direction be just,
Torque winding magnetic fluxDirection existsxAxle positive direction and negative direction such as Fig. 4, aroundxEvery group in axle positive direction and negative direction 2
11,2 sulculuses of vat 12 are counterclockwise.Suspending windings X phases phase -90 is spent, and X+ energizations direction is negative, and X- energizations direction is
Just, suspending windings produce magnetic flux, magnetic flux xAxle positive direction around 2 vats, 11,2 sulculuses 12 counterclockwise,xAxle negative direction is around the clockwise direction of 2 vats, 11,2 sulculuses 12.After torque winding magnetic flux and the superposition of suspending windings magnetic flux,
xThe 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, electromagnetic attraction conjunction
Power isxThe vector of axle positive direction,yDirection of principal axis electromagnetic attraction is cancelled out each other, and synthesis electromagnetic attraction existsxAxle positive direction, so as to produce
It is rawxThe radial suspension force of axle positive direction.Similarly, when suspending windings X is powered reverse, suspending windings produce magnetic flux, flow direction
With flow direction in Fig. 4 on the contrary, torque winding flow direction is constant, after magnetic flux superposition,xThe magnetic flux of axle positive direction weakens,xAxle
The magnetic flux of negative direction is strengthened, so as to producexThe radial suspension force of axle negative direction.
Rotor core 7 is not in the case of suspending windings 5 are powered, in equilbrium position, if rotor core 7 is acted on by outer power of disturbing
DeviationyAxle negative direction, then according in Fig. 3, magnetic fluxDirection existsyAxle positive direction and negative direction are suspending windings clockwise
Y windings are powered, and produce the magnetic flux distribution in Fig. 3,yAxle positive direction direction be it is clockwise,yAxle negative direction be it is counterclockwise, from
AndyAxle positive direction resultant flux is strengthened,yAxle negative direction resultant flux weakens, and producesyThe suction of axle positive directionF y , you can allow and turn
Sub- iron core 7 returns to equilbrium position.If rotor core 7 is disturbed power effect deviation y-axis positive direction by outer, it is powered in suspending windings Y windings
Direction changes,yThe suction of direction of principal axisF y Direction is reverse, producesyThe suction of axle negative directionF y , you can allow rotor core 7 to return to balance
Position.If rotor is disturbed power effect deviation by outerxAxle negative direction, then according in Fig. 4, magnetic fluxDirection existsxAxle positive direction and losing side
To for counterclockwise, suspending windingsxWinding is powered, and produces the magnetic flux distribution in Fig. 4,xAxle positive direction direction be it is counterclockwise,
xAxle negative direction direction is clockwise.After magnetic flux superposition,xThe magnetic flux of axle positive direction is strengthened,xThe magnetic flux of axle negative direction weakens,
ProducexThe suction of axle positive directionF x , you can allow rotor core 7 to return to equilbrium position.Similarly, if rotor core 7 is disturbed masterpiece by outside
With deviationxAxle positive direction, then it is powered, produces according to suspending windings X windings opposite direction in Fig. 4xThe suction of axle negative directionF x , you can
Rotor core 7 is allowed to return to equilbrium position.
Claims (5)
1. a kind of permanent-magnetic electric machine with bearing of square shaped stator structure, rotor core（7）Surface Mount is along the circumferential direction fixed on outer wall to be had
Permanent magnet（8）, it is characterized in that：Permanent magnet（8）It is cased with square shaped stator outside（1）, square shaped stator（1）External wall cross-section be square
Shape, square shaped stator（1）Above evenly distributed in the circumferential direction to have 12 stator slots, 12 stator slots are by 8 identical vats（11）
With 4 identical sulculuses（12）Composition, 8 vats（11）With 4 sulculuses（12）Each per one group two-by-two relative to square
Diagonal is symmetrical, 8 vats（11）Close to diagonal positions, sulculus（12）Away from diagonal；Sulculus（12）It is interior be provided with it is small
Groove torque winding（62）, vat（11）In internal layer be provided with vat torque winding（61）, outer layer be provided with suspending windings（5）.
2. a kind of permanent-magnetic electric machine with bearing of square shaped stator structure according to claim 1, it is characterized in that：Vat torque winding
（61）With sulculus torque winding（62）The stator torque winding of composition is the Double Layer Winding of left and right distribution mode, square two
Bar diagonal is respectivelyxAxle andyAxle, fromyAxle positive direction starts in the counterclockwise direction, stator torque winding be sequentially winding A-,
C-、C+、B+、B-、A-、A+、C+、C-、B-、B+、A+、A-、C-、C+、B+、B-、A-、A+、C+、C-、B-、B+、A+；Suspending windings
（5）FromyAxle positive direction starts to be sequentially winding Y+, X-, X-, Y-, Y-, X+, X+, Y+ in the counterclockwise direction.
3. a kind of permanent-magnetic electric machine with bearing of square shaped stator structure according to claim 1, it is characterized in that：12 stator slot shapes
Into 12 stator tooths, vat（11）And sulculus（12）Groove width need ensure 12 stator tooths teeth portion width all same, vat
（11）And sulculus（12）Trench bottom apart from square shaped stator（1）Outer wall distance it is equal.
4. a kind of permanent-magnetic electric machine with bearing of square shaped stator structure according to claim 3, it is characterized in that：Vat（11）Groove
It is deep to be more than sulculus（12）Groove depth, vat（11）Groove bottom width be more than sulculus（12）Groove bottom width.
5. a kind of permanent-magnetic electric machine with bearing of square shaped stator structure according to claim 1, it is characterized in that：Rotor core（7）
Outer wall on along the circumferential direction fix Surface Mount and have the permanent magnets of 4 identical arc-shapeds（8）, 4 permanent magnets（8）Radially fill
Magnetic, two adjacent permanent magnets（8）The inner and outer end opposite polarity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467338.1A CN107425622B (en) | 2017-06-20 | 2017-06-20 | A kind of permanent-magnetic electric machine with bearing of square shaped stator structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710467338.1A CN107425622B (en) | 2017-06-20 | 2017-06-20 | A kind of permanent-magnetic electric machine with bearing of square shaped stator structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107425622A true CN107425622A (en) | 2017-12-01 |
| CN107425622B CN107425622B (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710467338.1A Expired - Fee Related CN107425622B (en) | 2017-06-20 | 2017-06-20 | A kind of permanent-magnetic electric machine with bearing of square shaped stator structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111277092A (en) * | 2020-02-17 | 2020-06-12 | 南京航空航天大学 | Stator modularized double-rotor alternating pole permanent magnet motor |
| CN111313576A (en) * | 2020-04-02 | 2020-06-19 | 南京航空航天大学 | Modularized permanent magnet motor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6434142A (en) * | 1987-07-30 | 1989-02-03 | Fujitsu General Ltd | Stator core for motor |
| JPH0556614A (en) * | 1991-08-21 | 1993-03-05 | Shibaura Eng Works Co Ltd | Motor |
| CN102480175A (en) * | 2010-11-23 | 2012-05-30 | 大连创达技术交易市场有限公司 | Bearingless levitation rotor permanent magnet motor |
| CN104953728A (en) * | 2014-03-28 | 2015-09-30 | 德昌电机(深圳)有限公司 | Polygonal stator iron core and motor comprising polygonal stator iron core |
| CN105656269A (en) * | 2016-03-14 | 2016-06-08 | 江苏大学 | Bearing-free permanent magnetic synchronous generator |
-
2017
- 2017-06-20 CN CN201710467338.1A patent/CN107425622B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6434142A (en) * | 1987-07-30 | 1989-02-03 | Fujitsu General Ltd | Stator core for motor |
| JPH0556614A (en) * | 1991-08-21 | 1993-03-05 | Shibaura Eng Works Co Ltd | Motor |
| CN102480175A (en) * | 2010-11-23 | 2012-05-30 | 大连创达技术交易市场有限公司 | Bearingless levitation rotor permanent magnet motor |
| CN104953728A (en) * | 2014-03-28 | 2015-09-30 | 德昌电机(深圳)有限公司 | Polygonal stator iron core and motor comprising polygonal stator iron core |
| CN105656269A (en) * | 2016-03-14 | 2016-06-08 | 江苏大学 | Bearing-free permanent magnetic synchronous generator |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111277092A (en) * | 2020-02-17 | 2020-06-12 | 南京航空航天大学 | Stator modularized double-rotor alternating pole permanent magnet motor |
| CN111277092B (en) * | 2020-02-17 | 2021-05-11 | 南京航空航天大学 | Stator modularized double-rotor alternating pole permanent magnet motor |
| CN111313576A (en) * | 2020-04-02 | 2020-06-19 | 南京航空航天大学 | Modularized permanent magnet motor |
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| CN107425622B (en) | 2019-03-05 |
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