CN102545435B - Sectional rotor structure for permanent magnet synchronous motor - Google Patents
Sectional rotor structure for permanent magnet synchronous motor Download PDFInfo
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- CN102545435B CN102545435B CN201210019964.1A CN201210019964A CN102545435B CN 102545435 B CN102545435 B CN 102545435B CN 201210019964 A CN201210019964 A CN 201210019964A CN 102545435 B CN102545435 B CN 102545435B
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Classifications
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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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- Engineering & Computer Science (AREA)
- 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 the built-in segment permanent magnet synchronous electric motor rotor of a kind of permanent magnet for High Speed Railway Trains permanent magnet traction motor.
Background technology
Motor is to take magnetic field to carry out the calutron that mechanical energy and electric energy are changed mutually as medium.In order to set up and to carry out the necessary air-gap field of energy converting between mechanical at motor internal, can there be two kinds of methods.In motor winding, to pass to electric current to produce a magnetic field, for example common direct current machine and motor.The motor of this electric excitation had both needed to have special winding and corresponding device, needed again constantly to offer energy to maintain current flowing; Another kind is to produce magnetic field by permanent magnet.Due to the inherent characteristic of permanent magnetic material, it,, after magnetization (magnetizing) in advance, no longer needs external energy just can set up magnetic field at its surrounding space, i.e. so-called magneto.
Magneto is compared with traditional excitation electromotor has simple in structure, the distinguishing feature such as loss is little, power factor is high, efficiency is high, power density is high, starting torque is large, 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, magneto research and development are progressively ripe, make magneto at aspects such as national defence, industrial and agricultural production and daily lifes, obtain application more and more widely.
Magneto is to rely on to be arranged on the motor that epitrochanterian permanent magnet produces magnetic field, its stator structure and common with/asynchronous machine is basic identical, the stator core consisting of silicon steel plate stacking and the stator coil being embedded in stator coring groove form, thereby and pass to three-phase alternating current and in stator coil, produce rotating magnetic field.Permanent magnet machine rotor mainly consists 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 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.Surface-type rotor magnetic circuit structural is simple, low cost of manufacture, but rotor surface cannot be installed startup winding, thereby this type of magneto is without asynchronous starting ability, and the mechanical strength of rotor is poor, and cataclasm fault easily occurs permanent magnet under high rotating speed.The permanent magnet of interior permanent magnet machines rotor is positioned at internal rotor, and by the correlation of permanent magnet magnetization direction and rotor direction, built-in rotor magnetic structure can be divided into again radial, tangential and hybrid three kinds.Compare with surface-type rotor; interior permanent magnet machines rotor can be protected the relatively low permanent magnet of mechanical property; and can be according to the size that need to enlarge markedly permanent magnet of magneto performance, thereby be a kind of structure that permanent magnet machine rotor extensively adopts at present.
At present, conventional segment permanent magnet rotor adopts rotor bar to reinforce rotor more, but still have that mechanical strength is low, the problem such as poor reliability, the serious and inner leakage field of rotor surface eddy current loss are remarkable, thereby hindered the exploitation of high-power, high rotating speed, Large diameter rotary magneto, and then limited magneto application on bullet train as traction electric machine.
Chinese patent application has disclosed a kind of rotor of high-power permanent magnet motor No. 201010513307.3, adopt embedded permanent magnet structure, rotor consists of at least two rotor units vertically, on iron core between each rotor unit two neighboring pole permanent magnet, offer along rotor axial every magnetic groove, between adjacent rotor unit, be provided with the dividing plate that non-magnet_conductible material is made, rotor unit two ends are provided with end plate, and at least two rotor units are fixed by axial location tightening bolt.
There is following shortcoming in this permanent magnet machine rotor: the centrifugal force that 1, rotating pole-piece is subject to is by end plate, dividing plate and location tightening bolt shared, the location tightening bolt that is to say fixed rotor unit need to bear moment of flexure, when rotor high-speed rotates, centrifugal force is very large, easily cause location tightening bolt to be centrifuged power bending, that is to say, this rotor is not suitable for the motor of High Rotation Speed.Although 2 offer every magnetic groove at iron core, but still there is coupling part in the iron core between adjacent permanent magnet, the magnetic field of permanent magnet of two neighboring pole is easily directly communicated with and causes leakage field by the core portion between permanent magnet, that is to say, this structure cannot 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 adopting when rotor is thicker, the effective length of rotor will sharply reduce, thereby affect the electromagnetic performance of rotor.
Summary of the invention
For overcoming the above-mentioned shortcoming of prior art, the invention provides a kind of mechanical strength high, be applicable to the sectional rotor structure for permanent magnet synchronous motor of high-speed rotary motor.
Sectional rotor structure for permanent magnet synchronous motor, comprise rotating shaft, be fixed on the rotor core of rotating shaft, be placed on the permanent magnet outside rotor core, be positioned at permanent magnet outer for reasonable layout magnetic field rotating pole-piece that permanent magnet is played a protective role, and lay respectively at front end-plate and the end plate at rotor core two ends;
It is characterized in that: between two end plates, be provided with a plurality of rotor dividing plates of being made by non-magnet material, separate between rotating pole-piece, rotating pole-piece and rotor dividing plate distribute at axially spaced-apart, rotor dividing plate is divided into a plurality of rotor units vertically by rotor, two end faces of each rotor unit rotor pole shoe are adjacent to the end face of adjacent rotor dividing plate respectively, and each rotor unit rotor pole shoe is corresponding to permanent magnet; 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 pole shoe tightening bolt, and pole shoe tightening bolt is locked rotating pole-piece and the rotor dividing plate between left back end plate and left back end plate vertically;
The corner of the through hole of rotor dividing plate adopts arc transition to concentrate to reduce the stress of corner, gapped between the permanent magnet through hole on permanent magnet and rotor dividing plate.
Permanent magnet between each rotating pole-piece and rotor core can be a monoblock, can be also that polylith permanent magnet is spliced along rotor axial.While having polylith permanent magnet between rotating pole-piece and rotor core, be respectively equipped with the corresponding permanent magnet of each through hole on rotor dividing plate, have parting bead between adjacent through-holes, the corner of each permanent magnet through hole all adopts arc transition to fall stress concentration.
Further, rotor dividing plate is provided with the lightening hole that alleviates separator, falls stress concentration, each permanent magnet through hole is distributed with a plurality of lightening holes around, and same permanent magnet a plurality of lightening holes around form a lightening hole group, symmetrical between lightening hole group.Lightening hole is the polygonal hole that circular port or mounting hole or turning are arc 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 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 respectively two adjacent rotor dividing plates;
Two end faces of rotating pole-piece are close to respectively two adjacent rotor dividing plates, the lower edge two ends of the close rotor core of rotating pole-piece are respectively equipped with the first flange group to downward-extension, the upper limb two ends of the close rotating pole-piece of rotor core are respectively equipped with upwardly extending the second flange group, and the first flange group and the second flange group are limited in permanent magnet between rotating pole-piece and 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 pole shoe tightening nut, and 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 pole shoe tightening bolt by screw respectively with end plate, screw and fixing threaded hole engagement.
Technical conceive of the present invention is: along the axial of rotor structure, with rotor dividing plate, rotor structure is divided into a plurality of rotor units, the rotating pole-piece of adjacent rotor unit passes through rotor dividing plate every magnetic, in 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 respectively two rotor dividing plates, the centrifugal force that when frictional force between dependence rotating pole-piece and rotor dividing plate also overcomes rotor structure High Rotation Speed, rotating pole-piece and permanent magnet are subject to; Two end faces of rotor core are close to respectively and two rotor dividing plates, the centrifugal force that when frictional force between dependence rotor core and rotor dividing plate also overcomes rotor structure High Rotation Speed, rotating pole-piece and permanent magnet are subject to; Between the lamination of rotating pole-piece and between the dividing plate lamination of rotor dividing plate, be also to rely on mutual frictional force to overcome centrifugal force meanwhile, between the lamination of rotor core.Rely on and regulate the coupling mechanism force of pole shoe tightening bolt to regulate the frictional force between rotating pole-piece and rotor dividing plate, pole shoe tightening bolt only need to bear axial pulling force and without bearing the moment of flexure producing due to centrifugal force, 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: centrifugal force when 1, the frictional force between dependence rotating pole-piece and dividing plate overcomes rotor structure rotation, tightening bolt is not subject to moment of flexure, non-frangibility, the long service life of rotor structure.2, permanent magnet and rotor core run through respectively rotor dividing plate, and the thickness of rotor dividing plate does not take the axial length of rotor structure.3, separate between rotating pole-piece, avoid occurring leakage field phenomenon.
Accompanying drawing explanation
Fig. 1 is segment permanent magnet rotor parts decomposing schematic representations.
Fig. 2 is that segment permanent magnet rotor and stator field are analyzed schematic diagram.
Fig. 3 is the schematic diagram of the first segment permanent magnet rotor dividing plate.
Fig. 4 is the assembling schematic diagram of the first segment permanent magnet rotor dividing plate and permanent magnet.
Fig. 5 is the schematic diagram of the second segment permanent magnet rotor dividing plate.
Fig. 6 is the schematic diagram of the third segment permanent magnet rotor dividing plate.
Fig. 7 is the 4th kind of segment permanent magnet rotor dividing plate schematic diagram.
Fig. 8 is segment permanent magnet rotor pole shoe and rotor core released state schematic diagram.
Fig. 9 is the segment permanent magnet rotor parts decomposing schematic representation while using the 4th kind of dividing plate.
Figure 10 is segment permanent magnet rotor permanent magnet, rotating pole-piece and the rotor dividing plate decomposing schematic representation while using the 4th kind of dividing plate.
Segment permanent magnet rotor axis of electric when Figure 11 is the 4th kind of dividing plate of use and the schematic diagram that cooperatively interacts of rotor core and rotor dividing plate.
Figure 12 is the rotating pole-piece of segment permanent magnet rotor in released state and the assembling schematic diagram of rotor core and rotor dividing plate while using the 4th kind of dividing plate.
Figure 13 segment permanent magnet rotor assembling schematic diagram.
Embodiment
Embodiment mono-
With reference to Fig. 1-5
As shown in Figure 1, sectional rotor structure for permanent magnet synchronous motor, comprise rotating shaft 10, be fixed on the rotor core 15 of rotating shaft 10, be placed on the permanent magnet 13 outside rotor core 15, be positioned at permanent magnet 13 outer for reasonable layout magnetic field rotating pole-piece 14 that permanent magnet 13 is played a protective role, and lay respectively at front end-plate 11 and the end plate 12 at rotor core 15 two ends;
Between two end plates 11,12, be provided with a plurality of rotor dividing plates 16 of being made by non-magnet material, separate between 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 by rotor, two end faces of each rotor unit rotor pole shoe 14 are adjacent to the end face of adjacent rotor 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, the rotating pole-piece 14 and rotor dividing plate 16 of pole shoe tightening bolt 23 between the left back end plate 11,12 of axial locking and left back end plate 11,12;
The corner of the through hole of rotor dividing plate 16 adopts arc transition to concentrate to reduce the stress of corner, gapped between the permanent magnet through hole on permanent magnet 13 and rotor dividing plate 16.
As shown in Figure 3, motor-field magnetic flux (magnetic line of force) is by the circulation of following path for the two-dimentional Analysis of Magnetic Circuit of permanent magnet machine rotor.The magnetic line of force, from the N utmost point of current permanent magnet 13A, enters air gap 28 through rotating pole-piece 14A, then by stator teeth 262, enters stator.In stator, along stator yoke portion 261, arrive region corresponding to consecutive roots, then enter air gap from stator teeth.Then from adjacent rotating pole-piece 14B, enter the S utmost point of adjacent permanent magnet 13B, then enter rotor core 15 from the N utmost point.The N utmost point of finally getting back to current permanent magnet 13A forms flux loop.
As shown in Figure 1, in order to overcome the powerful centrifugal force that major diameter permanent magnet machine rotor pole shoe 14 and permanent magnet 13 are subject under high rotating speed operating mode, therefore rotating pole-piece 14 and rotor core 15 are divided into some subsegments of length-specific along rotor axial.As shown in Figure 1, axially between adjacent rotor pole shoe 14 and rotor core 15 subsegments, inserting rotor dividing plate 16, even if rotating pole-piece 14, rotor core 15 and rotor dividing plate 16 distribute alternately successively, the centrifugal force that the frictional force balancing rotor pole shoe 14 between rotor dividing plate 16 and rotating pole-piece 14 and permanent magnet 13 are subject to when rotor rotates.Because rotor core 15 is fixed on armature spindle 10, thereby the centrifugal force that rotor core 15 is subject to is born by armature spindle 10.In order to meet mechanical strength, rigidity and the life requirements of 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 adopting non-magnet material (as high-strength aluminum alloy, carbon fibre, pottery etc.) or low-permeability material (as high strength austenitic stainless steel, titanium alloy), makes by rotor dividing plate 16, thereby along rotor axial, insert rotor dividing plate 16 and can not cause magnetic leakage problem, can not make a significant impact the magnetic property of rotor yet.
Permanent magnet 13 between each rotating pole-piece 14 and rotor core 15 can be a monoblock, can be also that polylith permanent magnet 13 is spliced along rotor axial.While having polylith permanent magnet 13 between rotating pole-piece 14 and rotor core 15, on rotor dividing plate 16, be respectively equipped with the corresponding permanent magnet 13 of each through hole, between adjacent through-holes, have parting bead, the corner of each permanent magnet through hole all adopts arc transition to fall stress concentration, as shown in Figure 5.
Rotor dividing plate 16a adopts non-magnet material (as high-strength aluminum alloy, carbon fibre, pottery etc.) or low-permeability material (as high strength austenitic stainless steel, titanium alloy) sheet material to make, the centrifugal force being subject to for bear rotor rotating pole-piece 14 and permanent magnet 13 when the high speed rotating.Rotor dividing plate 16 comprises for realizing the through hole 165 of the radial and axial location of permanent magnet 13 relative armature spindles 10, for holding the circular port 161 of pole shoe tightening bolt 23, for holding the circular port 162 of tightening bolt 24 unshakable in one's determination, coordinate the center hole 163 for the radial location of the relative armature spindle 10 of rotor dividing plate 16 with the outer surface of armature spindle 10, keyway 164 coordinates with the key 25 on armature spindle 10, for the circumferential location of rotor dividing plate 16 relative armature spindles 10.
The structure of the first rotor dividing plate 16a as shown in Figure 3; Rotor dividing plate 16a is profiled holes formation for holding the through hole 165 of permanent magnet 13, and the permanent magnet between rotating pole-piece and rotor core is monolithic magnet.The medial surface 163a of the permanent magnet through hole 161 of rotor dividing plate 16a and 164a recline mutually with surperficial 133a and the 131a of permanent magnet 13a respectively, thereby realize the radial location of the relative armature spindle 10 of described permanent magnet 13a, the medial surface 161a of described rotor dividing plate 16a and 162a recline mutually with the two sides 132a of permanent magnet 13a respectively, thereby realize the circumferential location of the relative armature spindle 10 of permanent magnet 13a, as shown in Figure 4.
The structure of the second rotor dividing plate 16b as shown in Figure 5, is spliced along rotor axial by two permanent magnets between rotating pole-piece and rotor core.The medial surface 163b of rotor dividing plate 16b and 164b are for realizing the radial location of the relative armature spindle 10 of permanent magnet 13, medial surface 162b and the 165b circumferential location for realizing the relative armature spindle 10 of permanent magnet 13, keyway 164 and interior circular hole 163 are respectively used to realize the circumferential and radial location of the relative armature spindle 10 of rotor dividing plate 16b.For holding a side of the through hole of permanent magnet 13, adopt two circular arc 161b, another side to adopt straight flange 165b.
In addition, the thermoset macromolecule materials such as gap filling glass steel that can be between permanent magnet machine rotor pole shoe 14 and rotor dividing plate 16 or epoxy resin, prevent motor when running up because rotor surface irregularity forms air eddy, to reduce the air drag of described permanent magnet machine rotor when running up, and can prevent that by permanent magnet 13, collapsing broken produced fragment falls into the air gap between permanent magnet machine rotor and stator, avoids occurring unnecessary mechanical breakdown.
Technical conceive of the present invention is: along the axial of rotor structure, with rotor dividing plate 16, rotor structure is divided into a plurality of rotor units, the rotating pole-piece 14 of adjacent rotor unit passes through rotor dividing plate 16 every magnetic, in 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 unshakable in one's determination 24 lockings, two end faces of rotating pole-piece 14 are closely attached on respectively two rotor dividing plates 16, the centrifugal force that when frictional force between dependence rotating pole-piece 14 and rotor dividing plate 16 also overcomes rotor structure High Rotation Speed, rotating pole-piece 14 and permanent magnet 13 are subject to; Two end faces of rotor core 15 are close to respectively and two rotor dividing plates 16, the centrifugal force that when frictional force between dependence rotor core 15 and rotor dividing plate 16 also overcomes rotor structure High Rotation Speed, rotating pole-piece 14 and permanent magnet 13 are subject to; Between the lamination of rotating pole-piece 14 and between the dividing plate lamination of rotor dividing plate 16, be also to rely on mutual frictional force to overcome centrifugal force meanwhile, between the lamination of rotor core 15.Rely on and regulate the coupling mechanism force of pole shoe tightening bolt to regulate the frictional force between rotating pole-piece and rotor dividing plate, 23 needs of pole shoe tightening bolt bear axial pulling force and without bearing the moment of flexure producing due 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: centrifugal force when 1, the frictional force between dependence rotating pole-piece and dividing plate overcomes rotor structure rotation, tightening bolt is not subject to moment of flexure, non-frangibility, the long service life of rotor structure.2, permanent magnet and rotor core run through respectively rotor dividing plate, and the thickness of rotor dividing plate does not take the axial length of rotor structure.3, separate between rotating pole-piece, avoid occurring leakage field phenomenon.
Embodiment bis-
With reference to Fig. 6-12
The difference of the present embodiment and embodiment mono-is: rotor dividing plate 16 is provided with lightening hole.Rotor dividing plate 16 is provided with the lightening hole 166 that alleviates separator, falls stress concentration, each permanent magnet through hole 165 is distributed with a plurality of lightening holes 166 around, same permanent magnet 13 a plurality of lightening holes 166 around form a lightening hole group, symmetrical between lightening hole group.The polygonal hole that lightening hole 166 is arc transition for circular port or mounting hole or turning, lightening hole 166 mainly concentrates on the corner of permanent magnet through hole.
The structure of the third rotor dividing plate 16c as shown in Figure 6, the medial surface 163c of the permanent magnet through hole of rotor dividing plate 16c and 164c are for realizing the radial location of the relative armature spindle 10 of permanent magnet 13, medial surface 165c is for the circumferential location of realizing permanent magnet 13 relative armature spindles 10, and keyway 164 and interior circular hole 163 are respectively used to realize the circumferential and radial location of the relative armature spindle 10 of rotor dividing plate 16c.The lightening hole of this rotor dividing plate 16c comprises the polygonal hole that circular port and turning are arc transition, and lightening hole 166 is distributed in a side of the close rotor core 15 of permanent magnet through hole.
The structure of the 4th kind of rotor dividing plate 16d as shown in Figure 7, the medial surface 163d of the permanent magnet through hole of rotor dividing plate 16d and 164d are for realizing the radial location of the relative armature spindle 10 of permanent magnet 13, the circumferential location of medial surface 165d for realizing permanent magnet 13 relative armature spindles 10, interior circular arc 166d, 167d and 168d are all the transition arcs that arrange for falling stress concentration.Keyway 164 and interior circular hole 163 be respectively used to realize the relative armature spindle 10 of rotor dividing plate 16d circumferentially and radial location.The lightening hole of this rotor dividing plate 16d comprises the polygonal hole that circular port and turning are arc transition, and lightening hole 166 is distributed in a side of the close rotor core 15 of permanent magnet through hole.
Rotating pole-piece 14 is stacked pole shoe, rotor core 15 is 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 respectively two adjacent rotor dividing plates 16.
Rotating pole-piece 14 adopts the ferromagnetic material sheet material that magnetic properties are good (as the thickness silicon steel sheet that is 0.2 ~ 0.5mm) to be formed by stacking; for reasonable layout rotor field; and can play a protective role to permanent magnet 13, prevent that permanent magnet 13 from occurring under centrifugal action cataclasm.Rotor core 15 adopts the sheet ferromagnetic material sheet material that the magnetic property identical with rotating pole-piece 14 is good (as the thickness silicon steel sheet that is 0.2 ~ 0.5mm) to be formed by stacking.The cross section structure of rotating pole-piece 14 and rotor core 15 as shown in Figure 8.On rotating pole-piece 14,8 circular ports 146 are for holding pole shoe tightening bolt 23, and plane 141 and 142 is respectively used to realize the circumferential and radial location of the relative armature spindle 10 of permanent magnet 13.On rotor core 15,4 circular ports 155 are for holding tightening bolt 24 unshakable in one's determination, center hole 153 coordinates with the outer surface of armature spindle 10, radial location for rotor core 15 relative armature spindles 10, keyway 154 and key 25(on armature spindle 10 are as shown in figure 11) coordinate, 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 respectively two adjacent rotor dividing plates 16, the lower edge two ends of the close rotor core 15 of rotating pole-piece 14 are respectively equipped with the first flange group 141 to downward-extension, the upper limb two ends of the close rotating pole-piece 14 of rotor core 15 are respectively equipped with upwardly extending the 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 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 occur.Each rotor dividing plate 16 is formed by stacking by multi-disc dividing plate lamination.
By lightening hole being set on rotor dividing plate, not only can alleviate the weight of rotor structure, the stress that in the time of can also reducing rotation, permanent magnet extruding rotor dividing plate causes is concentrated.
Embodiment tri-
With reference to Figure 13
The difference part of the present embodiment and embodiment bis-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 by 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 and end plate 12 adopt thicker non-magnet material (as high-strength aluminum alloy) sheet material or low-permeability material (as high strength austenitic stainless steel) sheet material to make, not only rotating pole-piece 14, rotor dividing plate 16 and permanent magnet 13 are had to firm effect, also can be used as duplicate removal structure when permanent magnet machine rotor is carried out to dynamic balance calibration.Front end-plate fastening bolt 17 is connected by 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 connected, 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 rotor front end.The back end outer surface of pole shoe tightening bolt 23 is with external screw thread 232, and external screw thread 232 is connected and can realizes the fastening of rotating pole-piece 14 and rotor dividing plate 16 with pole shoe tightening bolt nut 20.Pole shoe tightening bolt nut 20 and be placed with lock washer 22 between the rear side surface 148 of the rotating pole-piece 14 of rotor rear end, prevent that described pole shoe tightening bolt nut 20 from occurring loosening, thereby also can be coated with metal-to-metal adhesive in the external screw thread 232 of pole shoe tightening bolt 23 and the threaded engagement of pole shoe tightening bolt nut 20, realize the firm of the two and connect.End plate fastening bolt 18 is connected by 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 connected, 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 rotor rear end.As shown in figs. 1 and 6, between the endoporus 111 of described rotor front end-plate 11 and the axle collar 102 of armature spindle 10, remain with less gap, prevent that described front end-plate 11 and described armature spindle 10 from interfering when rotor assembles.
Content described in this specification embodiment is only enumerating the way of realization of inventive concept; protection scope of the present invention should not be regarded as only limiting to the concrete form that embodiment states, protection scope of the present invention also and in those skilled in the art, according to the present invention, conceive the equivalent technologies means that can expect.
Claims (2)
1. sectional rotor structure for permanent magnet synchronous motor, comprise rotating shaft, be fixed on the rotor core of rotating shaft, be placed on the permanent magnet outside rotor core, be positioned at permanent magnet outer for reasonable layout magnetic field rotating pole-piece that permanent magnet is played a protective role, and lay respectively at front end-plate and the end plate at rotor core two ends;
It is characterized in that: between two end plates, be provided with a plurality of rotor dividing plates of being made by non-magnet material, separate between rotating pole-piece, rotating pole-piece and rotor dividing plate distribute at axially spaced-apart, rotor dividing plate is divided into a plurality of rotor units vertically by rotor, two end faces of each rotor unit rotor pole shoe are adjacent to the end face of adjacent rotor dividing plate respectively, and each rotor unit rotor pole shoe is corresponding to permanent magnet; 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 pole shoe tightening bolt, rotating pole-piece and the rotor dividing plate of pole shoe tightening bolt between the left back end plate of axial locking and left back end plate;
Two end faces of rotating pole-piece are closely attached on respectively two rotor dividing plates, the centrifugal force that when frictional force between dependence rotating pole-piece and rotor dividing plate also overcomes rotor structure High Rotation Speed, rotating pole-piece and permanent magnet are subject to; Two end faces of rotor core are close to respectively two rotor dividing plates, the centrifugal force that when frictional force between dependence rotor core and rotor dividing plate also overcomes rotor structure High Rotation Speed, rotating pole-piece and permanent magnet are subject to;
The corner of the through hole of rotor dividing plate is arc transition, gapped between the permanent magnet through hole on permanent magnet and rotor dividing plate;
Rotating pole-piece is stacked pole shoe, and rotor core is 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 respectively two adjacent rotor dividing plates;
Two end faces of rotating pole-piece are close to respectively two adjacent rotor dividing plates, the lower edge two ends of the close rotor core of rotating pole-piece are respectively equipped with the first flange group to downward-extension, the upper limb two ends of the close rotating pole-piece of rotor core are respectively equipped with upwardly extending the second flange group, and the first flange group and the second flange group are limited in permanent magnet between rotating pole-piece and rotor core; Each rotor dividing plate is formed by stacking by multi-disc dividing plate lamination; The two ends of pole shoe tightening bolt are respectively equipped with pole shoe tightening nut, and 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 pole shoe tightening bolt by screw respectively with end plate, screw and fixing threaded hole engagement.
2. sectional rotor structure for permanent magnet synchronous motor as claimed in claim 1, it is characterized in that: rotor dividing plate is provided with the lightening hole that alleviates separator, falls stress concentration, each permanent magnet through hole is distributed with a plurality of lightening holes around, same permanent magnet a plurality of lightening holes around form a lightening hole group, symmetrical between lightening hole group, lightening hole is the polygonal hole that circular port or mounting hole or turning are arc transition, and lightening hole mainly concentrates on the corner of permanent magnet through hole.
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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| CN102545435A CN102545435A (en) | 2012-07-04 |
| CN102545435B true 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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| WO (1) | WO2013107127A1 (en) |
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| CN102545493B (en) * | 2012-01-22 | 2014-03-05 | 浙江大学 | Method for manufacturing rotor of permanent-magnet motor |
| CN102931741B (en) * | 2012-11-13 | 2014-12-17 | 永济新时速电机电器有限责任公司 | Compact permanent magnet wind generator rotor |
| CN207010382U (en) * | 2016-04-06 | 2018-02-13 | 深圳市帅泰科技有限公司 | Rotor |
| DE102016207703A1 (en) * | 2016-05-04 | 2017-11-09 | Robert Bosch Gmbh | Belt drive, for example belt-driven starter generator |
| CN106981950A (en) * | 2017-05-17 | 2017-07-25 | 襄阳华博士新能源科技有限公司 | A kind of novel air-cooled motor based on heat pipe |
| CN107482810B (en) * | 2017-09-29 | 2023-08-25 | 创远亿德(天津)集团有限公司 | Efficient rotor |
| CN108512373B (en) * | 2018-06-10 | 2023-10-24 | 常州神力电机股份有限公司 | Lamination tooling for self-adhesive rotor iron core |
| CN108832739B (en) * | 2018-08-31 | 2024-06-18 | 广东电网有限责任公司 | Synchronous camera rotor and synchronous camera |
| JP7080345B2 (en) * | 2018-12-13 | 2022-06-03 | 三菱電機株式会社 | Motors, compressors and refrigeration cycle equipment |
| CN109973526B (en) * | 2019-04-26 | 2024-06-18 | 珠海格力电器股份有限公司 | Magnetic suspension bearing rotor assembly, motor and compressor |
| CN110460206A (en) * | 2019-08-12 | 2019-11-15 | 江苏中车电机有限公司 | A kind of electric machine stator iron Prepressing working |
| DE102019123434A1 (en) * | 2019-09-02 | 2021-03-04 | Schaeffler Technologies AG & Co. KG | Sheet metal ring for a laminated rotor core of a rotor of an electrical machine and method for producing a laminated rotor core from several sheet metal rings |
| CN112769266B (en) * | 2021-01-20 | 2024-06-18 | 贵州航天林泉电机有限公司 | Surface-mounted magnetic steel rotor structure with segmented oblique poles |
| DE102022205857A1 (en) * | 2022-06-09 | 2023-12-14 | Robert Bosch Gesellschaft mit beschränkter Haftung | Rotor of an electric machine |
| CN117791912A (en) * | 2022-09-28 | 2024-03-29 | 台达电子工业股份有限公司 | Rotor structure and rotor process |
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| CN102545435A (en) | 2012-07-04 |
| WO2013107127A1 (en) | 2013-07-25 |
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