CN102545435A - Sectional rotor structure for permanent magnet synchronous motor - Google Patents
Sectional rotor structure for permanent magnet synchronous motor Download PDFInfo
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- CN102545435A CN102545435A CN2012100199641A CN201210019964A CN102545435A CN 102545435 A CN102545435 A CN 102545435A CN 2012100199641 A CN2012100199641 A CN 2012100199641A CN 201210019964 A CN201210019964 A CN 201210019964A CN 102545435 A CN102545435 A CN 102545435A
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
- H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
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- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
A sectional rotor structure for a permanent magnet synchronous motor comprises a rotating shaft, a rotor core, permanent magnets, rotor pole shoes, a front end-plate and a rear end-plate, wherein a plurality of rotor baffles are arranged between the two end-plates; the rotor pole shoes are independent of one another and axially distributed at intervals together with the rotor baffles; the rotor baffles divide axially a rotor into a plurality of rotor units; two end surfaces of the rotor pole shoes in each rotor unit are respectively clung to the end surfaces of the adjacent rotor baffles; the rotor pole shoes in each rotor unit correspond to the permanent magnets; through holes allowing the permanent magnets to penetrate are formed on the rotor baffles; pole shoe draw-in bolts penetrate the front end-plate, the rotor pole shoes, the rotor baffles and the rear end-plate and axially lock the rotor pole shoes and the rotor baffles, which are arranged between the front and the rear end-plates; and the corners of the through holes of the rotor baffles are in arc transition, and clearances are kept between the permanent magnets and the permanent-magnet through holes on the rotor baffles. The sectional rotor structure for the permanent magnet synchronous motor has the advantages of high mechanical strength and suitability for motors rotating at high speed.
Description
Technical field
The present invention relates to a kind of rotor structure of radial permanent magnet synchronous machine, relate in particular to a kind of built-in segment permanent magnet synchronous electric motor rotor of permanent magnet that is used for high-speed railway train permanent magnet traction motor.
Background technology
Motor is to be that media carries out the calutron that mechanical energy and electric energy are changed each other with magnetic field.To carry out the necessary air-gap field of energy converting between mechanical in order setting up, two kinds of methods can be arranged at motor internal.A kind of is in motor windings, to pass to electric current to produce magnetic field for example common direct current machine and motor.The motor of this electric excitation had both needed special winding and corresponding device thereof, need constantly offer energy again and flow to keep electric current; Another kind is to produce magnetic field by permanent magnet.Because the inherent characteristic of permanent magnetic material, it through magnetization (magnetizing) in advance after, no longer need external energy just can set up magnetic field, promptly so-called magneto at its surrounding space.
Magneto is compared with traditional excitation electromotor has simple in structure, distinguishing features such as loss is little, power factor is high, efficient is high, power density is high, starting torque is big, temperature rise is low, lightweight.Improving constantly and improving and the progressively reduction of price along with rare earth permanent-magnetic material (particularly Nd-Fe-Bo permanent magnet material) magnetic property; The magneto research and development are progressively ripe, make magneto obtain application more and more widely at aspects such as national defence, industrial and agricultural production and daily lifes.
Magneto is to rely on to be installed in the motor that epitrochanterian permanent magnet produces magnetic field; Its stator structure and common with/asynchronous machine is basic identical; Stator core that promptly is made up of silicon steel plate stacking and the stator coil that is embedded in the stator coring groove are formed, thereby and pass to three-phase alternating current and in stator coil, produce rotating magnetic field.Permanent magnet machine rotor mainly is made up of rotor core and permanent magnet, and this is the main distinction of magneto and other types motor, and rotor magnetic circuit structural is the key technology place of magneto.The magnetic structure that rotor adopts is different, and then the runnability of motor, control strategy, manufacturing process and use occasion are also different.
According to the difference of permanent magnet installation site on permanent magnet machine rotor, the rotor magnetic circuit of magneto generally can be divided into three kinds of surface-type, built-in and Lundells etc.Simple, the low cost of manufacture of surface-type rotor magnetic circuit structural, but rotor surface can't be installed the startup winding, thereby this type of magneto do not have asynchronous startup ability, and the mechanical strength of rotor is relatively poor, the permanent magnet cataclasm fault of generation easily under high rotating speed.The permanent magnet of interior permanent magnet machines rotor is positioned at internal rotor, presses the correlation of permanent magnet magnetization direction and rotor direction of rotation, and the built-in rotor magnetic structure can be divided into radial, tangential and hybrid three kinds again.Compare with the surface-type rotor; The interior permanent magnet machines rotor can be protected the relatively low permanent magnet of mechanical property; And can enlarge markedly the size of permanent magnet, thereby be a kind of structure that permanent magnet machine rotor extensively adopts at present according to the needs of magneto performance.
At present; Segment permanent magnet rotor commonly used adopts rotor bar to reinforce rotor more; But still have that mechanical strength is low, problem such as poor reliability, the serious and inner leakage field of rotor surface eddy current loss are remarkable; Thereby hindered high-power, high rotating speed, the exploitation of tactical diameter magneto greatly, and then limited magneto as the application of traction electric machine on bullet train.
One Chinese patent application has disclosed a kind of rotor of high-power permanent magnet motor No. 201010513307.3; Adopt the embedded permanent magnet structure; Rotor is made up of two rotor units vertically at least, offers the separated magnetic groove along rotor axial on the iron core between each rotor unit two neighboring pole permanent magnet, is provided with the dividing plate that non-magnet_conductible material is processed between the adjacent rotors unit; The rotor unit two ends are provided with end plate, and at least two rotor units are fixed through the axial location tightening bolt.
There is following shortcoming in this permanent magnet machine rotor: 1, the centrifugal force that receives of rotating pole-piece is born by end plate, dividing plate and location tightening bolt jointly; The location tightening bolt that is to say the fixed rotor unit need bear moment of flexure; When rotor high-speed rotated, centrifugal force was very big, caused the location tightening bolt by the centrifugal force bending easily; That is to say that this rotor is not suitable for motor rotating at high speed.Though 2 offer at a distance from the magnetic groove at iron core; But still there is the coupling part in the iron core between the adjacent permanent magnet; The magnetic field of permanent magnet of two neighboring pole directly is communicated with through the core portion between the permanent magnet easily and causes leakage field, that is to say, this structure can't avoid leakage field and leakage field serious.3, dividing plate is arranged between two adjacent rotor units, and the thickness of dividing plate has taken rotor effective length vertically; When more the and rotor dividing plate of the number of the rotor unit that adopts when rotor is thicker, the effective length of rotor will sharply reduce, thereby influence the electromagnetic performance of rotor.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, it is high to the invention provides a kind of mechanical strength, is applicable to the segment permanent magnet synchronous electric motor rotor structure of high-speed rotary motor.
Segment permanent magnet synchronous electric motor rotor structure; Comprise rotating shaft; Be fixed in the rotor core of rotating shaft; Be placed on the outer permanent magnet of rotor core, be positioned at rotating pole-piece and front end-plate that lays respectively at the rotor core two ends and end plate that permanent magnet is used for reasonable distributed magnetic field outward and permanent magnet is played a protective role;
It is characterized in that: be provided with a plurality of rotor dividing plates of processing by non-magnet material between two end plates; Separate between the rotating pole-piece; Rotating pole-piece and rotor dividing plate distribute at axially spaced-apart; The rotor dividing plate is divided into a plurality of rotor units vertically with rotor, and two end faces of each rotor unit rotor pole shoe are adjacent to the end face of adjacent rotors dividing plate respectively, and each rotor unit rotor pole shoe is corresponding to permanent magnet; The rotor dividing plate is provided with the through hole that allows permanent magnet to run through, and front end-plate, rotating pole-piece, rotor dividing plate and end plate are penetrated with the pole shoe tightening bolt, and the pole shoe tightening bolt is locked rotating pole-piece and the rotor dividing plate between left back end plate and the left back end plate vertically;
The corner of the through hole of rotor dividing plate adopts the camber line transition to concentrate with the stress that reduces corner, and is gapped between the permanent magnet through hole on permanent magnet and the rotor dividing plate.
Permanent magnet between each rotating pole-piece and the rotor core can be a monoblock, also can be that the polylith permanent magnet is spliced along rotor axial.When the polylith permanent magnet is arranged between rotating pole-piece and the rotor core, be respectively equipped with the corresponding permanent magnet of each through hole on the rotor dividing plate, parting bead is arranged between the adjacent through-holes, the corner of each permanent magnet through hole all adopts the camber line transition to concentrate to reduce stress.
Further; The rotor dividing plate is provided with and alleviates separator, the concentrated lightening hole of reduction stress; Be distributed with a plurality of lightening holes around each permanent magnet through hole, a plurality of lightening holes around the same permanent magnet form a lightening hole group, are symmetrically distributed between the lightening hole group.Lightening hole is that circular port or mounting hole or turning are the polygonal hole of camber line transition, and lightening hole mainly concentrates on the corner of permanent magnet through hole.
Further; Rotating pole-piece is stacked pole shoe; Rotor core is a laminated core, and rotor dividing plate and rotor core are provided with the tightening bolt unshakable in one's determination of axial locking rotor core and rotor dividing plate, and two end faces of rotor core are close to two adjacent rotor dividing plates respectively;
Two end faces of rotating pole-piece are close to two adjacent rotor dividing plates respectively; The lower edge two ends near rotor core of rotating pole-piece are respectively equipped with to the first flange group that extends below; The upper limb two ends near rotating pole-piece of rotor core are respectively equipped with the upwardly extending second flange group, and the first flange group and the second flange group are limited in permanent magnet between rotating pole-piece and the rotor core.
Further, each rotor dividing plate is formed by stacking by multi-disc dividing plate lamination.
Further, the two ends of pole shoe tightening bolt are respectively equipped with the pole shoe tightening nut, and the pole shoe tightening nut is close to the rotating pole-piece at two ends; The two ends of pole shoe tightening bolt are respectively equipped with fixing threaded hole, and front end-plate is connected with the pole shoe tightening bolt through screw respectively with end plate, screw and fixing threaded hole engagement.
Technical conceive of the present invention is: with the rotor dividing plate rotor structure is divided into a plurality of rotor units along the axial of rotor structure; The rotating pole-piece of adjacent rotors unit is through the separated magnetic of rotor dividing plate; In the same rotor unit; Rotating pole-piece is separate and can not be interconnected, thereby has avoided the generation of leakage field phenomenon.Rotor structure relies on pole shoe tightening bolt and tightening bolt unshakable in one's determination locking; Two end faces of rotating pole-piece are closely attached on two rotor dividing plates respectively, the centrifugal force that rotating pole-piece and permanent magnet received when the frictional force between dependence rotating pole-piece and the rotor dividing plate also overcame the rotor structure high speed rotating; Two end faces of rotor core are close to respectively and two rotor dividing plates, the centrifugal force that rotating pole-piece and permanent magnet received when the frictional force between dependence rotor core and the rotor dividing plate also overcame the rotor structure high speed rotating; Also be to rely on mutual frictional force to overcome centrifugal force between the lamination of rotating pole-piece and between the dividing plate lamination of rotor dividing plate simultaneously, between the lamination of rotor core.Rely on the coupling mechanism force of regulating the pole shoe tightening bolt to regulate the frictional force between rotating pole-piece and the rotor dividing plate; The pole shoe tightening bolt only need bear axial pulling force and need not to bear the moment of flexure that produces owing to centrifugal force; The pole shoe tightening bolt is not easy to be fractureed, the long service life of rotor structure.
The invention has the beneficial effects as follows: the centrifugal force when 1, the frictional force between dependence rotating pole-piece and the dividing plate overcomes the rotor structure rotation, tightening bolt does not receive moment of flexure, non-frangible, the long service life of rotor structure.2, permanent magnet and rotor core run through the rotor dividing plate respectively, and promptly the thickness of rotor dividing plate does not take the axial length of rotor structure.3, separate between the rotating pole-piece, avoid taking place the leakage field phenomenon.
Description of drawings
Fig. 1 is segment permanent magnet rotor parts decomposing schematic representations.
Fig. 2 is that segment permanent magnet rotor and stator field are analyzed sketch map.
Fig. 3 is the sketch map of first kind of segment permanent magnet rotor dividing plate.
Fig. 4 is the assembling sketch map of first kind of segment permanent magnet rotor dividing plate and permanent magnet.
Fig. 5 is the sketch map of second kind of segment permanent magnet rotor dividing plate.
Fig. 6 is the sketch map of the third segment permanent magnet rotor dividing plate.
Fig. 7 is the 4th a kind of segment permanent magnet rotor dividing plate sketch map.
Fig. 8 is segment permanent magnet rotor pole shoe and rotor core released state sketch map.
Segment permanent magnet rotor parts decomposing schematic representation when Fig. 9 is to use the 4th kind of dividing plate.
Segment permanent magnet rotor permanent magnet when Figure 10 is to use the 4th kind of dividing plate, rotating pole-piece and rotor dividing plate decomposing schematic representation.
Segment permanent magnet rotor axis of electric when Figure 11 is to use the 4th kind of dividing plate and the sketch map that cooperatively interacts of rotor core and rotor dividing plate.
Segment permanent magnet rotor when Figure 12 is to use the 4th kind of dividing plate is in the rotating pole-piece of released state and the assembling sketch map of rotor core and rotor dividing plate.
Figure 13 segment permanent magnet rotor assembling sketch map.
Embodiment
Embodiment one
With reference to Fig. 1-5
As shown in Figure 1; Segment permanent magnet synchronous electric motor rotor structure; Comprise rotating shaft 10, be fixed in the rotor core 15 of rotating shaft 10, be placed on the permanent magnet 13 outside the rotor core 15; Be positioned at outer rotating pole-piece 14 that is used for reasonable distributed magnetic field and permanent magnet 13 is played a protective role of permanent magnet 13 and the front end-plate 11 and end plate 12 that lays respectively at rotor core 15 two ends;
Two end plates 11, be provided with a plurality of rotor dividing plates of processing by non-magnet material 16 between 12; Separate between the rotating pole-piece 14; Rotating pole-piece 14 distributes at axially spaced-apart with rotor dividing plate 16; Rotor dividing plate 16 is divided into a plurality of rotor units vertically with rotor, and two end faces of each rotor unit rotor pole shoe 14 are adjacent to the end face of adjacent rotors dividing plate 16 respectively, and each rotor unit rotor pole shoe 14 is corresponding to permanent magnet 13; Rotor dividing plate 16 is provided with the through hole that allows permanent magnet 13 to run through; Front end-plate 11, rotating pole-piece 14, rotor dividing plate 16 and end plate 12 are penetrated with pole shoe tightening bolt 23, and pole shoe tightening bolt 23 is at the left back end plate 11,12 of axial locking and left back end plate 11, rotating pole-piece 14 and rotor dividing plate 16 between 12;
The corner of the through hole of rotor dividing plate 16 adopts the camber line transition to concentrate with the stress that reduces corner, and is gapped between the permanent magnet through hole on permanent magnet 13 and the rotor dividing plate 16.
The two-dimentional magnetic circuit of permanent magnet machine rotor is analyzed as shown in Figure 3, and motor-field magnetic flux (magnetic line of force) is by the circulation of following path.The magnetic line of force gets into air gap 28 from the N utmost point of current permanent magnet 13A through rotating pole-piece 14A, gets into stator through stator teeth 262 then.In stator, arrive the corresponding zone of consecutive roots, get into air gap from stator teeth again along stator yoke portion 261.Then get into the S utmost point of adjacent permanent magnet 13B, get into rotor core 15 from the N utmost point again from adjacent rotors pole shoe 14B.The N utmost point of getting back to current permanent magnet 13A at last forms flux loop.
As shown in Figure 1, in order to overcome the powerful centrifugal force that under high rotating speed operating mode major diameter permanent magnet machine rotor pole shoe 14 and permanent magnet 13 receive, so rotating pole-piece 14 and rotor core 15 be divided into the plurality of sub section of length-specific along rotor axial.As shown in Figure 1; Axially inserting rotor dividing plate 16 between adjacent rotor pole shoe 14 and the rotor core 15 son sections; Even rotating pole-piece 14, rotor core 15 and rotor dividing plate 16 distribute alternately successively, the centrifugal force that frictional force balancing rotor pole shoe 14 between rotor dividing plate 16 and the rotating pole-piece 14 and permanent magnet 13 receive when rotor rotation.Because rotor core 15 is fixed on the armature spindle 10, thereby the centrifugal force that rotor core 15 receives is born by armature spindle 10.For mechanical strength, rigidity and the life requirements of satisfying rotor, and give full play to the mechanical property of rotor dividing plate 16 materials, can adopt finite element method to obtain the optimum thickness value of rotating pole-piece 14 and rotor dividing plate 6.Because rotor dividing plate 16 adopts non-magnet material (like high-strength aluminum alloy, carbon fibre, pottery etc.) or low-permeability material (like high strength austenitic stainless steel, titanium alloy) to process; Thereby insert rotor dividing plate 16 along rotor axial and can not cause the magnetic leakage problem, can not produce appreciable impact to the magnetic property of rotor yet.
Rotor dividing plate 16a adopts non-magnet material (like high-strength aluminum alloy, carbon fibre, pottery etc.) or low-permeability material (like high strength austenitic stainless steel, titanium alloy) sheet material to process, and is used for the centrifugal force that bear rotor rotating pole-piece 14 and permanent magnet 13 when high speed rotating receive.The through hole 165 that comprises the radial and axial location that is used to realize permanent magnet 13 relative armature spindles 10 in the rotor dividing plate 16; Be used to hold the circular port 161 of pole shoe tightening bolt 23; Be used to hold the circular port 162 of tightening bolt 24 unshakable in one's determination; The center hole 163 that cooperates the radial location that is used for rotor dividing plate 16 relative armature spindles 10 with the outer surface of armature spindle 10, keyway 164 cooperates with key 25 on the armature spindle 10, is used for the circumferential location of rotor dividing plate 16 relative armature spindles 10.
The structure of first kind of rotor dividing plate 16a is as shown in Figure 3; The through hole 165 that rotor dividing plate 16a is used to hold permanent magnet 13 is that profiled holes constitutes, and the permanent magnet between rotating pole-piece and the rotor core is the monolithic magnet.The medial surface 163a of the permanent magnet through hole 161 of rotor dividing plate 16a and 164a recline with surperficial 133a and the 131a of permanent magnet 13a respectively each other; Thereby realize the radial location of the relative armature spindle 10 of said permanent magnet 13a; The medial surface 161a of said rotor dividing plate 16a and 162a recline with the two sides 132a of permanent magnet 13a respectively each other; Thereby realize the circumferential location of the relative armature spindle 10 of permanent magnet 13a, as shown in Figure 4.
The structure of second kind of rotor dividing plate 16b is as shown in Figure 5, is spliced along rotor axial by two permanent magnets between rotating pole-piece and the rotor core.The medial surface 163b of rotor dividing plate 16b and 164b are used to realize the radial location of permanent magnet 13 relative armature spindles 10; Medial surface 162b and 165b are used to realize the circumferential location of permanent magnet 13 relative armature spindles 10, and keyway 164 is respectively applied for the circumferential and radial location that realizes the relative armature spindle 10 of rotor dividing plate 16b with interior circular hole 163.A side that is used to hold the through hole of permanent magnet 13 adopts two circular arc 161b, another side to adopt straight flange 165b.
In addition; Can be at thermoset macromolecule materials such as gap filling glass steel between permanent magnet machine rotor pole shoe 14 and the rotor dividing plate 16 or epoxy resin; Prevent that motor from forming air eddy because of the rotor surface irregularity when running up; Reducing the air drag of said permanent magnet machine rotor when running up, and can prevent that collapsing the broken fragment that produces by permanent magnet 13 falls into the air gap between permanent magnet machine rotor and the stator, avoids taking place unnecessary mechanical breakdown.
Technical conceive of the present invention is: with rotor dividing plate 16 rotor structure is divided into a plurality of rotor units along the axial of rotor structure; The rotating pole-piece 14 of adjacent rotors unit is through rotor dividing plate 16 separated magnetic; In the same rotor unit; Rotating pole-piece 14 is separate and can not be interconnected, thereby has avoided the generation of leakage field phenomenon.Rotor structure relies on pole shoe tightening bolt 23 and tightening bolt 24 lockings unshakable in one's determination; Two end faces of rotating pole-piece 14 are closely attached on two rotor dividing plates 16 respectively, the centrifugal force that rotating pole-piece 14 and permanent magnet 13 received when the frictional force between dependence rotating pole-piece 14 and the rotor dividing plate 16 also overcame the rotor structure high speed rotating; Two end faces of rotor core 15 are close to respectively and two rotor dividing plates 16, the centrifugal force that rotating pole-piece 14 and permanent magnet 13 received when the frictional force between dependence rotor core 15 and the rotor dividing plate 16 also overcame the rotor structure high speed rotating; Also be to rely on mutual frictional force to overcome centrifugal force between the lamination of rotating pole-piece 14 and between the dividing plate lamination of rotor dividing plate 16 simultaneously, between the lamination of rotor core 15.Rely on the coupling mechanism force of regulating the pole shoe tightening bolt to regulate the frictional force between rotating pole-piece and the rotor dividing plate; 23 needs of pole shoe tightening bolt bear axial pulling force and need not to bear the moment of flexure that produces owing to centrifugal force; Pole shoe tightening bolt 23 is not easy to be fractureed, the long service life of rotor structure.
The invention has the beneficial effects as follows: the centrifugal force when 1, the frictional force between dependence rotating pole-piece and the dividing plate overcomes the rotor structure rotation, tightening bolt does not receive moment of flexure, non-frangible, the long service life of rotor structure.2, permanent magnet and rotor core run through the rotor dividing plate respectively, and promptly the thickness of rotor dividing plate does not take the axial length of rotor structure.3, separate between the rotating pole-piece, avoid taking place the leakage field phenomenon.
Embodiment two
With reference to Fig. 6-12
The difference of present embodiment and embodiment one is: rotor dividing plate 16 is provided with lightening hole.Rotor dividing plate 16 is provided with and alleviates separator, the concentrated lightening hole 166 of reduction stress; Be distributed with a plurality of lightening holes 166 around each permanent magnet through hole 165; A plurality of lightening holes 166 around the same permanent magnet 13 form a lightening hole group, are symmetrically distributed between the lightening hole group.Lightening hole 166 is the polygonal hole of camber line transition for circular port or mounting hole or turning, and lightening hole 166 mainly concentrates on the corner of permanent magnet through hole.
The structure of the third rotor dividing plate 16c is as shown in Figure 6; The medial surface 163c of the permanent magnet through hole of rotor dividing plate 16c and 164c are used to realize the radial location of permanent magnet 13 relative armature spindles 10; Medial surface 165c is used to realize the circumferential location of permanent magnet 13 relative armature spindles 10, and keyway 164 is respectively applied for the circumferential and radial location that realizes the relative armature spindle 10 of rotor dividing plate 16c with interior circular hole 163.The lightening hole of this rotor dividing plate 16c comprises that circular port and turning are the polygonal hole of camber line transition, and lightening hole 166 is distributed in the side near rotor core 15 of permanent magnet through hole.
The structure of the 4th kind of rotor dividing plate 16d is as shown in Figure 7; The medial surface 163d of the permanent magnet through hole of rotor dividing plate 16d and 164d are used to realize the radial location of permanent magnet 13 relative armature spindles 10; Medial surface 165d is used to realize the circumferential location of permanent magnet 13 relative armature spindles 10, and interior circular arc 166d, 167d and 168d concentrate the transition arc that is provided with for reducing stress.Keyway 164 is respectively applied for the circumferential and radial location that realizes the relative armature spindle 10 of rotor dividing plate 16d with interior circular hole 163.The lightening hole of this rotor dividing plate 16d comprises that circular port and turning are the polygonal hole of camber line transition, and lightening hole 166 is distributed in the side near rotor core 15 of permanent magnet through hole.
Rotating pole-piece 14 is stacked pole shoe; Rotor core 15 is a laminated core; Rotor dividing plate 16 and rotor core 15 are provided with the tightening bolt unshakable in one's determination 24 of axial locking rotor core 15 and rotor dividing plate 16, and two end faces of rotor core 15 are close to two adjacent rotor dividing plates 16 respectively.
Rotating pole-piece 14 adopts the good ferromagnetic material sheet material (is the silicon steel sheet of 0.2 ~ 0.5mm like thickness) of magnetic property to be formed by stacking; Be used for reasonable distribution rotor magnetic field; And can play a protective role to permanent magnet 13, it is cataclasm to prevent that permanent magnet 13 from taking place under centrifugal action.Rotor core 15 is adopted and is formed by stacking with the rotating pole-piece 14 identical good sheet ferromagnetic material sheet materials (is the silicon steel sheet of 0.2 ~ 0.5mm like thickness) of magnetic property.The cross section structure of rotating pole-piece 14 and rotor core 15 is as shown in Figure 8.On rotating pole-piece 14,8 circular ports 146 are used to hold pole shoe tightening bolt 23, and plane 141 and 142 is respectively applied for the circumferential and radial location that realizes permanent magnet 13 relative armature spindles 10.On rotor core 15; 4 circular ports 155 are used to hold tightening bolt 24 unshakable in one's determination; Center hole 153 cooperates with the outer surface of armature spindle 10; Be used for the radial location of rotor core 15 relative armature spindles 10, keyway 154 cooperates with key 25 (shown in figure 11) on the armature spindle 10, is used for the circumferential location of rotor core 15 relative armature spindles 10.
As shown in Figure 8; Two end faces of rotating pole-piece 14 are close to two adjacent rotor dividing plates 16 respectively; The lower edge two ends near rotor core 15 of rotating pole-piece 14 are respectively equipped with to the first flange group 141 that extends below; The upper limb two ends near rotating pole-piece 14 of rotor core 15 are respectively equipped with the upwardly extending second flange group, 151, the first flange groups 141 and the second flange group 151 is limited in permanent magnet 13 between rotating pole-piece 14 and the rotor core 15.Gapped 145 between the first flange group 141 and the second flange group 151, so rotating pole-piece 14 is separate with rotor core 15, leakage field can not take place.Each rotor dividing plate 16 is formed by stacking by multi-disc dividing plate lamination.
Through on the rotor dividing plate, lightening hole being set, not only can alleviate the weight of rotor structure, the stress that permanent magnet extruding rotor dividing plate causes in the time of can also reducing rotation is concentrated.
Embodiment three
With reference to Figure 13
The difference part of present embodiment and embodiment two is: the two ends of pole shoe tightening bolt 23 are respectively equipped with pole shoe tightening nut 20, and pole shoe tightening nut 20 is close to the rotating pole-piece 14 at two ends; The two ends of pole shoe tightening bolt 20 are respectively equipped with fixing threaded hole, and front end-plate 11 is connected with pole shoe tightening bolt 23 through screw 18 respectively with end plate 12, screw 18 and fixing threaded hole engagement.All the other structures are all identical.
Rotor front end-plate 11 adopts thicker non-magnet material (like high-strength aluminum alloy) sheet material or low-permeability material (like the high strength austenitic stainless steel) sheet material to process with end plate 12; Not only rotating pole-piece 14, rotor dividing plate 16 and permanent magnet 13 are had firm effect, also can be used as the weight structure that goes when permanent magnet machine rotor carried out dynamic balance calibration.Front end-plate fastening bolt 17 links through external screw thread and the internal thread hole 233 that is positioned at pole shoe tightening bolt 23 front ends; Rotor front end-plate 11 and pole shoe tightening bolt 23 are linked, thereby the medial surface 112 of rotor front end-plate 11 is abutted on the leading flank 147 of the rotating pole-piece 14 that is positioned at the rotor front end.The back end outer surface of pole shoe tightening bolt 23 has external screw thread 232, and external screw thread 232 links with pole shoe tightening bolt nut 20 then can realize the fastening of rotating pole-piece 14 and rotor dividing plate 16.Pole shoe tightening bolt nut 20 and between the rear side surface 148 of the rotating pole-piece 14 of rotor rear end, be placed with lock washer 22; It is loosening to prevent that said pole shoe tightening bolt nut 20 from taking place, and realizes that the firm of the two connects thereby also can in the threaded engagement of the external screw thread 232 of pole shoe tightening bolt 23 and pole shoe tightening bolt nut 20, be coated with metal-to-metal adhesive.End plate fastening bolt 18 links through external screw thread and the internal thread hole 231 that is positioned at pole shoe tightening bolt 23 rear ends; Rotor end plate 12 and pole shoe tightening bolt 23 are linked, thereby 121 of the medial surfaces of rotor end plate 12 are abutted on the rear side surface 148 of the rotating pole-piece 14 that is positioned at the rotor rear end.As shown in figs. 1 and 6, remain with less clearance between the endoporus 111 of said rotor front end-plate 11 and the axle collar 102 of armature spindle 10, prevent that said front end-plate 11 from interfering when rotor assembles with said armature spindle 10.
The described content of this specification embodiment only is enumerating the way of realization of inventive concept; Protection scope of the present invention should not be regarded as and only limit to the concrete form that embodiment states, protection scope of the present invention also reach in those skilled in the art conceive according to the present invention the equivalent technologies means that can expect.
Claims (6)
1. segment permanent magnet synchronous electric motor rotor structure; Comprise rotating shaft; Be fixed in the rotor core of rotating shaft; Be placed on the outer permanent magnet of rotor core, be positioned at rotating pole-piece and front end-plate that lays respectively at the rotor core two ends and end plate that permanent magnet is used for reasonable distributed magnetic field outward and permanent magnet is played a protective role;
It is characterized in that: be provided with a plurality of rotor dividing plates of processing by non-magnet material between two end plates; Separate between the rotating pole-piece; Rotating pole-piece and rotor dividing plate distribute at axially spaced-apart; The rotor dividing plate is divided into a plurality of rotor units vertically with rotor, and two end faces of each rotor unit rotor pole shoe are adjacent to the end face of adjacent rotors dividing plate respectively, and each rotor unit rotor pole shoe is corresponding to permanent magnet; The rotor dividing plate is provided with the through hole that allows permanent magnet to run through, and front end-plate, rotating pole-piece, rotor dividing plate and end plate are penetrated with the pole shoe tightening bolt, rotating pole-piece and the rotor dividing plate of pole shoe tightening bolt between left back end plate of axial locking and left back end plate;
The corner of the through hole of rotor dividing plate is the camber line transition, and is gapped between the permanent magnet through hole on permanent magnet and the rotor dividing plate.
2. segment permanent magnet synchronous electric motor rotor structure as claimed in claim 1; It is characterized in that: the rotor dividing plate is provided with and alleviates separator, the concentrated lightening hole of reduction stress; Be distributed with a plurality of lightening holes around each permanent magnet through hole; A plurality of lightening holes around the same permanent magnet form a lightening hole group, are symmetrically distributed between the lightening hole group.
3. lightening hole is that circular port or mounting hole or turning are the polygonal hole of camber line transition, and lightening hole mainly concentrates on the corner of permanent magnet through hole.
4. according to claim 1 or claim 2 segment permanent magnet synchronous electric motor rotor structure; It is characterized in that: rotating pole-piece is stacked pole shoe; Rotor core is a laminated core; Rotor dividing plate and rotor core are provided with the tightening bolt unshakable in one's determination of axial locking rotor core and rotor dividing plate, and two end faces of rotor core are close to two adjacent rotor dividing plates respectively;
Two end faces of rotating pole-piece are close to two adjacent rotor dividing plates respectively; The lower edge two ends near rotor core of rotating pole-piece are respectively equipped with to the first flange group that extends below; The upper limb two ends near rotating pole-piece of rotor core are respectively equipped with the upwardly extending second flange group, and the first flange group and the second flange group are limited in permanent magnet between rotating pole-piece and the rotor core.
5. segment permanent magnet synchronous electric motor rotor structure as claimed in claim 1 is characterized in that: each rotor dividing plate is formed by stacking by multi-disc dividing plate lamination.
6. segment permanent magnet synchronous electric motor rotor structure as claimed in claim 1, it is characterized in that: the two ends of pole shoe tightening bolt are respectively equipped with the pole shoe tightening nut, and the pole shoe tightening nut is close to the rotating pole-piece at two ends; The two ends of pole shoe tightening bolt are respectively equipped with fixing threaded hole, and front end-plate is connected with the pole shoe tightening bolt through screw respectively with end plate, screw and fixing threaded hole engagement.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210019964.1A CN102545435B (en) | 2012-01-22 | 2012-01-22 | Sectional rotor structure for permanent magnet synchronous motor |
| PCT/CN2012/074753 WO2013107127A1 (en) | 2012-01-22 | 2012-04-26 | Segmented permanent-magnet synchronized motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210019964.1A CN102545435B (en) | 2012-01-22 | 2012-01-22 | Sectional rotor structure for permanent magnet synchronous motor |
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| Publication Number | Publication Date |
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| CN102545435A true CN102545435A (en) | 2012-07-04 |
| CN102545435B CN102545435B (en) | 2014-11-19 |
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| CN201210019964.1A Active CN102545435B (en) | 2012-01-22 | 2012-01-22 | Sectional rotor structure for permanent magnet synchronous motor |
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| CN (1) | CN102545435B (en) |
| WO (1) | WO2013107127A1 (en) |
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| WO2013107128A1 (en) * | 2012-01-22 | 2013-07-25 | 浙江大学 | Method for manufacturing permanent-magnet motor rotor |
| CN106357031A (en) * | 2016-04-06 | 2017-01-25 | 深圳市帅泰科技有限公司 | Motor rotor, motor applying motor rotor and method for calculating angle of motor rotor |
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| CN108832739A (en) * | 2018-08-31 | 2018-11-16 | 广东电网有限责任公司 | A kind of synchronous capacitor rotor and synchronous capacitor |
| CN109973526A (en) * | 2019-04-26 | 2019-07-05 | 珠海格力电器股份有限公司 | magnetic suspension bearing rotor assembly, motor and compressor |
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| Publication number | Publication date |
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| WO2013107127A1 (en) | 2013-07-25 |
| CN102545435B (en) | 2014-11-19 |
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