EP3178151A2 - Noyau feuilleté d'un stator ou d'un rotor et machine électrique - Google Patents

Noyau feuilleté d'un stator ou d'un rotor et machine électrique

Info

Publication number
EP3178151A2
EP3178151A2 EP15747109.5A EP15747109A EP3178151A2 EP 3178151 A2 EP3178151 A2 EP 3178151A2 EP 15747109 A EP15747109 A EP 15747109A EP 3178151 A2 EP3178151 A2 EP 3178151A2
Authority
EP
European Patent Office
Prior art keywords
sheet metal
metal part
laminated core
teeth
metal parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15747109.5A
Other languages
German (de)
English (en)
Inventor
Jürgen Fahrenbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
L Schuler GmbH
Original Assignee
L Schuler GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by L Schuler GmbH filed Critical L Schuler GmbH
Publication of EP3178151A2 publication Critical patent/EP3178151A2/fr
Withdrawn legal-status Critical Current

Links

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
    • H02K1/14—Stator cores with salient poles
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/02—Details of the magnetic circuit characterised by the magnetic material
    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/22—Notching the peripheries of circular blanks, e.g. laminations for dynamo-electric machines
    • 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
    • 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
    • H02K1/26—Rotor cores with slots for windings
    • H02K1/265—Shape, form or location of the slots
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49012—Rotor

Definitions

  • Laminated core of a stator or a rotor and a stator Laminated core of a stator or a rotor and a stator
  • the invention relates to a laminated core of a plurality of sheet metal parts, which may be part of a stator or a Läu ⁇ fers.
  • the invention also relates to an electric machine with a stator and a rotor, wherein the stator and / or the rotor have a laminated core of a plurality of sheet metal parts.
  • the rotor can rotate about an axis of rotation (rotor of a rotary electric machine) or move linearly along the stator in the case of a translationally operating electrical machine.
  • Sheet metal packages consist of a plurality of sheet metal parts which are connected to each other, for example by stamping, gluing or the like.
  • Each sheet metal part has a connecting part from which several teeth extend away.
  • the connecting part is closed in a circumferential direction about an axis of rotation designed as a ring part.
  • the teeth extend from Verbin ⁇ dung part radially to the axis of rotation either outwardly or inwardly to a respective free end.
  • the connecting part preferably extends straight or curved along the trajectory of the rotor and the teeth preferably extend at right angles to the direction of movement of the rotor away from the connecting part towards a respective free end and in particular are aligned parallel to each other.
  • DE 10 2012 213 239 AI proposes to use two different types of sheet metal parts and to stack these sheet metal parts in the laminated core to each other.
  • the different types of sheet metal parts are made us different materials.
  • sheet metal parts of different materials can be arranged alternately in the laminated core.
  • Sheet metal part may consist of a nickel-iron alloy and the other sheet metal part of an iron-cobalt alloy. This sheet metal parts are to be combined with a low loss ⁇ on the other hand, and on the other hand with high saturation flux density to a laminated core. Based on this prior art, the present invention, the object of the invention to provide a laminated core with which an electric machine can be improved.
  • the laminated core of a stator o- that of a runner on several first sheet metal parts and several second sheet metal parts.
  • the sheet metal parts for a rotary electric machine working have in the circumferential direction about a rotation axis enclosed connecting part and a plurality of teeth, starting radially to the rotation axis to a free end it ⁇ extend from the connecting part.
  • the sheet metal parts for a translationally working electrical machine have a rectilinear or curved along the trajectory of the rotor extending connecting part and the teeth extend preferential ⁇ at right angles to the trajectory of the rotor from Ver ⁇ binding part away.
  • the first sheet metal parts have a first connecting part and first teeth and the second sheet metal parts have a two ⁇ tes connecting part and second teeth.
  • Parallel to or along or coaxial with the direction of extension of the respective connecting part is a reference surface or reference axis.
  • the axis of rotation may be used as the reference axis.
  • a reference axis is present, which runs at right angles to the BEWE ⁇ movement path through the or the connecting parts of Blechpa ⁇ kets, said reference axes define a reference ⁇ area.
  • first and second sheet metal parts By stacking first and second sheet metal parts in the Laminated core can thus be formed a laminated core, wherein the end surfaces formed by the free ends of the first and second teeth two or more to the reference axis or the reference surface offset from each other arranged End vom ⁇ sections had. If the axis of rotation of the laminated core is used as a reference axis for a rotary electric machine, the end surface sections are ra ⁇ dial offset from the axis of rotation.
  • a direction is designated, in which the sheet metal parts are stacked to form the laminated core.
  • the stacking direction extends paral lel ⁇ to the rotational axis.
  • the stack direction is computationally twin ⁇ Kelig to the extending direction of the teeth and rectangular ⁇ lig to the path of movement of the rotor. The stacking direction is thus aligned parallel to the reference plane.
  • This stepped contour is formed in that we ⁇ ips a first sheet metal part group is present, which we ⁇ tendonss comprising a first sheet metal part and at least one second sheet metal parts group is present which has at least a second sheet metal part.
  • the at least one first sheet metal part group is present, which we ⁇ tendonss comprising a first sheet metal part and at least one second sheet metal parts group is present which has at least a second sheet metal part.
  • Sheet metal part group and the at least one second sheet metal parts ⁇ group are arranged alternately successively in a stacking direction. Because the free ends of the first teeth the first sheet metal subgroup having a different distance from the reference axis or the reference surface than the free end of the second teeth of the second sheet metal subgroup formed in the laminated core by the stacked first and second teeth, the described end face with a plurality of stages.
  • the length of the air gap between a sheet ⁇ packet of the stator and a lamination stack of the rotor magnification ⁇ can be ßert without the overall length of the sheet stacks must be increased in Sta ⁇ pelraum.
  • the magnetic flux can be increased due to the longer Heilspal ⁇ tes. If for example, a rotary or linear electric motor working is made with such a plate package, with the same Baugrö ⁇ SSE a greater torque can be achieved.
  • the abutting first and second sheet metal parts are preferably electrically insulated from one another at each contact point, for example by a lacquer or another coating. This allows eddy currents to be reduced.
  • the laminated core has a plurality of first and / or second sheet metal part groups. It is also advantageous if each first sheet metal part group has a plurality of first sheet metal parts and / or each second sheet metal part group has a plurality of second sheet metal parts.
  • At least a number of the existing first sheet metal parts may each have a first thickness.
  • the second sheet metal parts each a second thickness, so that the thickness of the second sheet metal parts is the same size.
  • the first thickness of the first Blechtei ⁇ le and the second thickness of the second sheet metal parts are the same size. It is also possible to choose the amount of the first thickness and the amount of the second thickness to be different.
  • first sheet metal parts are present, which have a third thickness.
  • the third thickness is preferably greater than the first thickness of the other first sheet metal parts.
  • the under ⁇ differently thick first sheet metal parts may be present in a common sheet metal subgroup.
  • one or each first sheet metal part group has a plurality of first sheet metal parts, wherein two of the first sheet metal parts form outer sheet metal parts and at least one further first sheet metal part forms a ⁇ nenes sheet metal part, which is arranged between the two outer sheet metal parts.
  • the stack of the first Blechtei ⁇ le this first sheet metal part group includes therefore in the stacking direction ⁇ viewed at two outer sheet-metal parts between which an inner sheet metal part or a plurality of inner sheet metal parts are arranged.
  • the inner sheet metal parts have in a perennialsbei ⁇ game a first thickness, while at least one of the two outer sheet metal parts has a third thickness which is greater than the first thickness.
  • Sheet metal parts without electrical insulation together ver ⁇ bind. Due to this larger third thickness of at least ei ⁇ nem outer sheet metal part of the entry of magnetic field lines in a direction perpendicular to the stacking direction oriented side surface portion of the first teeth of the outer sheet ⁇ part is improved.
  • sheet metal parts of a laminated core are made of the same material, but if a number of the existing sheet metal parts is made of one material and a number of existing sheet metal parts of a different material.
  • a sheet metal part group both sheet metal parts of a Mate ⁇ material as well as sheet metal parts from another material contained ent th ⁇ .
  • the materials used for the sheet metal parts are preferably soft magnetic. In any case, these are magnetizable materials.
  • the first material in particular is used for producing the outer sheet metal of a first sheet metal part group, a greater saturation magnetization ⁇ tion than the second material that is used for other sheet metal parts of the laminated core.
  • the first material for example, an iron alloy having a content of at least 45% or at least 50% cobalt can be used. Iron alloys containing nickel and / or molybdenum can also be used.
  • so-called “mu-metals” or iron alloys having nickel components and / or silicon components are preferably used.
  • the first material has a saturation magnetization ⁇ to at least 2.0 T or 2.3 T or 2.5 T or 3.0 T is.
  • the saturation magnetization of the second material is preferably at most 1.0 T.
  • the relative Per ⁇ meabiltician of the first material is smaller than that of the second material.
  • the first material has a rela tive ⁇ permeability of at most 20000.
  • the relative Perme ⁇ ABILITY of the second material may be at least 30,000 and are in one embodiment in the range from 100,000 to 200,000.
  • first sheet metal part and / or a second sheet metal part into a plurality of segments and to produce the segments each from a material, in particular the first or the second material.
  • at least one tooth head segment of a first or a two ⁇ th tooth which preferably comprises at least a portion of the free end of the tooth, manufactured from the second material be present.
  • the at the at least one tooth head segment at ⁇ bordering segment of the tooth may be prepared for example from the second material.
  • the volume fraction of the first Materi ⁇ than in the laminated core is smaller than the volume fraction of the second material, which brings a significant cost advantage.
  • the laminated core belongs to a rotor
  • projecting projections of a stator can intervene in this free space at right angles to the stacking direction and to the direction of movement of the rotor.
  • the laminated core belongs to a Sta ⁇ gate, can engage in this free space perpendicular to the stacking direction and to the direction of movement of the rotor projecting projections of a rotor.
  • the first teeth extend farther away from the respective connection part than the second teeth.
  • the first and the second teeth extend, starting from the compound ⁇ part radially outwardly from the axis of rotation away.
  • the first distance may be greater than the second Ab ⁇ stood, so that the free ends of the first teeth have a greater distance from the axis of rotation than the free ends of the second teeth.
  • the first and second teeth may extend radially inwardly from the connecting part towards the axis of rotation. In this case, the first distance may be smaller than the second distance, so that the free ends of the first teeth are arranged closer to the axis of rotation than the free ends of the second teeth.
  • the rotor and / or the stator of such an electric machine may have a laminated core described above.
  • tower above the first teeth of a first sheet metal part group of the rotor in each case a free space between two first sheet metal component parts of the stator in, and / or the first teeth of a first sheet metal part group of the stator extend in each ⁇ wells a free space between two first sheet metal component parts of the rotor inside.
  • the electric machine is perpendicular to the stack ⁇ direction consider a first sheet metal part of the rotor a second sheet metal part of the stator opposite and / or a first sheet metal part of the stator, a second sheet ⁇ partial group of the rotor opposite.
  • first and / or second sheet metal part For the production of the first and / or second sheet metal part can proceed as follows:
  • the first and / or second sheet metal parts are separated out of a starting sheet.
  • the separation can by cutting, punching, laser cutting, water jet cutting or the like. If a sheet metal part consists of several segments, which in turn are made of different materials, the respective segments are punched out of the respective starting sheet and then connected to one another in a material-locking and / or non-positive and / or form-fitting manner.
  • the hardening can take place, for example, by supplying heat at defined locations with the aid of a laser.
  • FIG. 1 shows a schematic partial representation of a first sheet metal part for a runner in side view
  • FIG. 2 shows a schematic partial representation of a two-part th sheet metal part for a runner in side view
  • FIG. 3 a schematic partial representation of a first sheet metal part for a stator in side view
  • Figure 4 is a partial schematic representation of a two ⁇ th sheet member for a stator in a side view
  • Figure 5 is a schematic perspective view of a section of a laminated core in the region of, in Sta ⁇ pelraum, parallel to the axis of rotation, stacked teeth of the sheet-metal parts or sheet-metal part groups
  • FIG. 6 shows a schematic, block diagram-like sectional view through the rotor and the stator of an electrical machine
  • FIG. 7 shows a schematic detail of the region IIV from FIG. 6,
  • FIGS. 8 to 10 each show a schematic representation of first teeth or second teeth of a first sheet metal part or of a second sheet metal part in side view, wherein each tooth has at least two segments made of different materials,
  • FIG. 11 shows a schematic, block diagram-like representation of areas of teeth of two first sheet metal parts by heat influence
  • Figure 12 is a schematic side view of the Blechpa ⁇ kete a rotor and a stator for a translato ⁇ cally operating electric machine.
  • the invention relates to a laminated core 14 from Blechtei ⁇ len 10, which can be used for a stator 15 or a rotor 11.
  • the stator 15 or the rotor 11 can be used for a rotary electrical machine (FIGS. 1 to 10) or a translatory electric machine (FIG. 12).
  • the essential characteristics are by way of example with reference to sheet metal parts 10 and sheet packs 14 explained for a rotary electric machine ar ⁇ beitende.
  • For a transla ⁇ toric working electrical machine OF INVENTION ⁇ to the invention features may be used equally.
  • sintered parts made of a sintered material could alternatively be used.
  • FIG. 1 shows a schematic partial representation of a first sheet-metal part 10 for a rotor 11 of an electric motor 12 (FIG. 7).
  • Figure 2 shows a second sheet metal part 13 for this Läu ⁇ fer 11. From a plurality of first sheet metal parts 10 and a plurality of second sheet metal parts 13, a laminated core 14 is produced.
  • the sheet metal parts 10, 13 are in this case connected by gluing, Stanzpake ⁇ animals or other means to the laminated core fourteenth
  • the laminated core 14 of the rotor 11 is disposed radially outwardly about a stator 15 coaxial with a rotation axis M. It is therefore an electric machine 12 with external rotor. It is understood that in a modification to the example of Figure 6, the rotor 11 could also be arranged radially within the stator 15.
  • the first sheet metal part 10 for the stator 15 of Figure 6 or the laminated core 14 of the stator 15 is illustrated schematically in Figure 3, while Figure 4 shows the second sheet ⁇ part 13 for the laminated core 14 of the stator 15 °.
  • the first sheet-metal part 10 has a first connecting part 18 which is closed annularly in a circumferential direction U about an axis of rotation D.
  • a plurality of first teeth 19 protrude radially from the first connecting part 18 to the rotational axis M up to a respective free end 20.
  • At the free end 20 of each first tooth 19 has an end edge 21.
  • the free ends 20 and the end edges 21 of the first teeth 19 have a first distance R from a reference axis BA, which is formed in accordance with Example ⁇ through the rotation axis M.
  • Preferably be ⁇ all end edges 21 are displayed on a common circular track, or cylinder surface about the reference axis BA and the axis of rotation M, the radius of which speaks ent ⁇ the first distance R ( Figures 1 and 3).
  • each second sheet metal part 13 has a second connecting part 25, starting from which a plurality of second teeth 26 extend radially to the rotation axis M up to a respective free end 27.
  • each second tooth 26 has an end edge 28, which has a two ⁇ th distance R2 from the reference axis BA, thus, for example according to the rotation axis M.
  • the free ends 27 and the end edges 28 of the second teeth 26 of a second sheet metal part 13 on a common circular path or cylinder surface around the rotation axis M whose radius corresponds to the second Ab ⁇ R2 stand ( Figures 2 and 4 ).
  • first and second teeth 19, 26 are constructed so that they have a toothed ridge 30, which is connected to the respectively associated ⁇ first and second connecting part 18, 25.
  • Brightonge ⁇ set end of each tooth 19, 26 is a tooth tip 31 IN ANY ⁇ the projecting in the circumferential direction U on both sides of the toothed ridge 30.
  • the free end 20 or 27 or the respective end edge 21 or 28 of a tooth 19 or 26 is located on the tooth head 31. It goes without saying that other tooth contours or tooth shapes can also be used in a modification to the illustrated exemplary embodiments.
  • a free space is formed between two directly adjacent teeth 19 of a first sheet metal part 10 or the directly adjacent second teeth 26 of a second sheet metal part 13, in which windings of the stator 15 or rotor 11 can be arranged.
  • the first and second sheet metal parts 10, 13 which form a ge ⁇ concomitantly laminated core 14 for a rotor 11 or stator 15, have differently sized first and second distances Rl, R2.
  • first and second distances Rl, R2. In a laminated core 14 with the connection ⁇ part 18, 25 radially outwardly projecting teeth 19, 26, the first distance R is greater than the second distance R2.
  • the first distance Rl To ⁇ swept in a laminated core 14 with the connecting part 18, 25 radially inwardly projecting teeth 19, 26, the first distance Rl smaller than the second distance R2.
  • a laminated core 14 with teeth projecting radially outwards is explained in more detail with reference to FIG. 5 based on the stator-side laminated core 14, for example.
  • a laminated core 14, from the connecting part 18th or 25 radially inwardly projecting teeth 19, 26, can be constructed analogously thereto.
  • Sheet metal parts 10 a first sheet metal part group 35.
  • Stapelrich ⁇ tion A directly adjacent to each other second sheet metal parts 13 form a second sheet metal subgroup 36.
  • At the ⁇ number of first and second sheet metal part groups 35, 36 may vary.
  • the number of first and second sheet metal subgroups 35, 36 of a common laminated core 14 differs by the value 1.
  • the first sheet metal subgroups 35 of the laminated core 14 are constructed identically. Accordingly, the second sheet metal subgroups 36 of the laminated core 14 are preferably constructed identically.
  • first and second sheet subgroups 35, 36 are always arranged alternately. Between two adjacent in the stacking direction A first sheet metal subgroups 35, a second sheet metal part group 36 is arranged or vice versa. Due to the different distances Rl, R2 the free ends 20, 27 and the end edges 21, 28 of the first teeth 19 and second teeth 26 creates a viewed in Sta ⁇ pelraum A stepped profile of the sheet metal 14 to the Pact ⁇ formed by the end edges 21, 28, 37. The end faces directly abutting end edges 21 of the first teeth 19 of a first sheet metal subgroup 35 form a first surface portion 37 a.
  • bil ⁇ directly abutting end edges 28 of the second teeth 26 of a second sheet metal part group 36 has a second surface portion 37b.
  • the number of first and second surface sections 37a, 37b depends on the number of existing first and second component groups 35, 36.
  • the first and second surface portions 37a, 37b move in the stacking direction A, so that ge formed between a first surface portion 37a and the immediately adjoining second surface portion 37b each have a step 38 is ⁇ .
  • All first and second surface portions 37a, 37b of the first and second teeth 19, 26 abutting one another in the stacking direction A form the end surface 37.
  • a free space F is formed following the second surface portion 37b of the second sheet metal subassembly 36 arranged therebetween, as indicated schematically in FIGS. 5 and 6.
  • the free space F extends in the circumferential direction U in an annular manner coaxial with the axis of rotation M. Radial projections of another laminated core 14 of the electric machine 12 can engage in such a free space F.
  • the areas of first teeth 19 of a rotor 15 or 15 adjoining free ends 20 engage Stators 11.
  • the meshing of the teeth 19, 26 and the sheet metal part package 14 of a stator 15 and the Blechteilpa ⁇ ketes 14 of a rotor 11 is strong in Figures 6 and 7 simplified illustrates.
  • the circumferentially U between ⁇ individual teeth 19, 26 existing circumferential gaps are not shown there for the sake of clarity.
  • FIGS. 6 and 7 A significant advantage of the embodiment of the laminated cores 14 according to the invention can be seen from FIGS. 6 and 7.
  • the existing between the rotor 11 and the stator 15 air gap L has perpendicular to the stacking Rich ⁇ tion A extending first air gap sections LR and pa ⁇ rallel to the stacking direction A extending second air ⁇ gap sections LA.
  • At each stage 38 is a first air gap section LR.
  • first air gap sections LR present at the steps 38, a greater overall length of the air gap L is achieved with the same size of the laminated core 14 measured in the stacking direction A, which results from the sum of the existing first and second air gap sections LR, LA. If a maximum flux density is given for the air gap L, by increasing or increasing the air gap L, a larger magnetic flux can be achieved. As a result, higher torques can be achieved, for example, for an electric motor with a constant size.
  • FIG 12 is schematically illustrated a laminated core 14 of a rotor 11 and a stator 15 for a translato ⁇ rically operating electric machine. Since there is no rotation axis M as the reference axis BA, a reference plane BE is defined and the first distance R1 and the second distance R2 between the free ends 20, 27 of the teeth 19, 26 are determined.
  • the reference plane BE is valid in Movement direction V of the rotor 11, which is defined within the Be ⁇ zugsebene BE at each point of a rectilinear or curved trajectory of the rotor 11.
  • the stacking direction A which predefines the second extension component of the reference plane BE, extends at right angles to the movement path or the direction of movement V of the rotor 11.
  • the exact position of the reference plane BE relative to the respective laminated core 14 is not critical, since it depends on the differences of the distances Rl, R2 and not their absolute value.
  • the jewei ⁇ celled BE reference plane of a sheet stack 14 can be achieved by Verbin ⁇ applied parts 18, extend 25th
  • connection ⁇ parts 18, 25 of the laminated core 14 of the stator 15 is not ring ⁇ shaped closed but extend straight or curved along the path of movement of the rotor 11.
  • the connecting parts 18, 25 of the laminated core 14 of the rotor 11 ver ⁇ preferably run in a straight line.
  • the respective teeth 19, 26 protrude at right angles from the associated connection part 18, 25 and extend at right angles to the reference plane ⁇ BE.
  • the formation of the steps 38 in the stacking direction A (perpendicular to the drawing plane in FIG. 12) is as shown in FIG. 7.
  • the features of the sheet metal parts 10 and / or the laminated cores 14 for a rotary electric machine can also be correspondingly illustrated in FIG Sheet metal parts 10 and / or the
  • first sheet metal parts 10 of a first sheet ⁇ partial group 35 may be made of different materials. Accordingly, different second sheet metal parts 13 be made of a second sheet metal part from group 36 differed ⁇ union materials.
  • the first sheet metal parts 10 and the second sheet metal parts 13 each consist of egg ⁇ nem uniform material.
  • the first sheet-metal parts 10 may be made of a different material, such as the second sheet-metal parts 13.
  • Example ⁇ according to a number of first sheet metal parts 10 of a first sheet metal subgroup 35 of a first material and other first sheet metal parts 10 of this first sheet metal subgroup 35 made of a second material.
  • a Eisenle ⁇ Government example which has at least 45% or at least 50% of play cobalt.
  • an iron alloy with nickel contents and / or silicon units may play be used.
  • so-called "mu-metals" come as a second material in question.
  • a material is used as a first material which has a higher saturation magnetization ⁇ than the second material.
  • the saturation magnetization of the first material may be greater than 2.0 T or 2.5 T or 3.0 T.
  • the saturation magnetization of the second material is preferably at most 1.0 T.
  • the relative permeability of the second material is in particular greater than that of the first material.
  • the rela tive ⁇ permeability of the second material may be beispielswei ⁇ se is greater than 30,000 and preferably in the range of 100,000 to 200.0000.
  • the relative permeability of the The first material can be smaller than 20,000.
  • first sheet metal parts 10 each form an outer plate part 10a and arranged in the stacking direction A between the first plate members 10 form inner sheet metal parts LOI.
  • At each outer sheet metal part 10a is so ⁇ with on one side an inner sheet metal part lOi.
  • the teeth 19, 26 have in these embodiments, at least one respective tooth tip segment 40, which is of a different Ma ⁇ TERIAL and, for example in accordance of the first material Herge ⁇ represents than the remaining part of the tooth.
  • the remaining part of the tooth - apart from the at least one Zahnkopfseg ⁇ ment 40 - consists, for example, of the second material.
  • the tooth head 30 is formed overall by the tooth head segment 40 and connected to the toothed bar 30 at a connection point 41.
  • the tooth head 31 can also have two tooth head segments 40.
  • the two tooth head segments 40 are in the circumferential direction U (in a sheet metal part for a rotationally operating electrical machine), or arranged in BEWE ⁇ supply direction V of the rotor (in a sheet metal part for a translatory operating electrical machine) distance from one another, could also touch each other at the end edge 21, 28 in this modification. They form the respec ⁇ gene end portions of a tooth head 31 in the circumferential direction U and seen in the direction of movement V of the rotor. Therefore, each toothed segment 40 forming part of the end edge 21 ei ⁇ nes first tooth 19 and an end edge 28 of a second tooth 26. As in the embodiment of Figure 8 is depending ⁇ the tooth tip segment 40 at a junction 41 with the adjacent portion of the first tooth in question 19 and second tooth 26 connected.
  • a material ⁇ positive connection by welding, laser welding, gluing, or the like stamped packetization is provided at a respective junction 41st
  • a positive and / or non-positive connection can also be provided at each connection point 41.
  • the course of the connection point 41 can be selected so that projections with extensions and associated recesses with undercuts similar to puzzle pieces or a dovetail connection are created.
  • Such connection points 41 are schematically illustrated in FIG. In this way, the tooth-tip segments 40 can also be connected in a form-locking and / or force-locking manner to the remaining part of the relevant tooth 19 or 26, in addition to or as an alternative to a cohesive connection.
  • each tooth head 31 opposite in the circumferential direction U can be made of the material from which the remaining part of the respective tooth 19 or 26 also consists.
  • the ⁇ se variant is advantageous if the rotor relative to the stator has a Hauptstonslegissinn or even exclusively a single direction of movement direction.
  • the tooth head segments 40 of a material having height ⁇ rer saturation magnetization are needed depending on the direction of movement sense only in an end portion of the tooth tip 31st
  • the inner sheet metal parts 10i have a first thickness d1.
  • the thickness of the sheet metal parts 10, 13 is measured in the stacking direction A. In the thickness measurement recesses and projections which serve for fastening or connection of sheet metal parts 10, 13 are not taken into account.
  • the thickness of a sheet metal part 10, 13 corresponds to the thickness of the Ninmateri ⁇ than, from which the sheet metal part 10, 13 is made. Also arranged between the sheet metal parts 10, 13 coatings to the sheet metal parts 10, 13 electrically isolie ⁇ reindeer, from each other not considered.
  • all the second sheet metal parts 13 have a second thickness d2, which may correspond to or be different from the first thickness d1.
  • the outer sheet metal parts 10a of the first sheet metal subgroups 15 each have a third thickness d3.
  • the third thickness d3 is preferably RESIZE ⁇ SSER than the first thickness dl and / or the second thickness d2.
  • Magnetic field lines H pass through the radial section LR of the air gap L arranged therebetween (FIG. 11).
  • these outer sheet metal parts 10a are made of a first material and / or have a different and, in particular, greater thickness (third thickness d3), the saturation magnetization is achieved less quickly even with a large magnetic flux. For example, with an electric motor, a higher magnetic flux and thus a higher torque can be achieved by a higher current.
  • a laminated core 14 may have a first sheet metal subassembly 35 at its two axial ends.
  • the laminated core 14 each delimiting outer plates 10a can be executed in this embodiment as the respective adjacent inner plates lOi.
  • the production of the outer sheets 10a of a first material and / or the provision of a third thickness d3 of the outer sheet metal parts 10a can be limited to the outer sheet metal parts 10a, which are arranged on a Stu ⁇ fe 38 and thus limit a radial section LR of the air gap L.
  • FIG. 11 a detail from FIG. 7 in the region of a step 38 is illustrated in a highly schematic manner. The arrangement corresponds to that as explained in connection with FIGS. 5 to 7, so that reference may be made to the above description. Strongly In FIG. 11, a microstructure change 42 is illustrated at certain points of a sheet metal part and according to the outer sheet metal parts 10 a, for example. Such structure modifiers ⁇ requirements 42 may range from sheet metal parts 10, 13 may be useful, which are adjacent to the air gap L. According to the example, the structural changes were placed several places in the region of the side surfaces of the outer plate members 10a to 42, the angren ⁇ zen to a first air gap portion LR.
  • the Weissian districts in the area of structural change 42 can be modified in their magnetic properties.
  • the entry or exit of magnetic field lines H which are indicated by dashed lines in FIG. 11, can be avoided or reduced in the region of structural changes 42.
  • the structural changes 42 can be generated, for example, by a heat influence, preferably by hardening the material.
  • a heat influence preferably by hardening the material.
  • an electron beam or other appropriate energy or heat source may be used to ⁇ .
  • the use of a laser or an electron beam has the advantage that the heat can be very selectively introduced into small areas.
  • the preparation of the first sheet metal parts 10 and the two ⁇ th sheet metal parts 13 is carried out by separating out the desired sheet metal part contours from a respective output sheet. If a sheet metal part 10, 13 made of a single material is made, the entire sheet metal part 10, 13 can be made integrally by cutting out of the starting sheet. If - as shown in Figures 8 to 10 - a sheet metal part 10, 13 or the first teeth 19 and / second teeth 26 made of several different materials, the respective segments are separated separately from a starting ⁇ sheet and then together with each other Connection points 41 connected.
  • the invention relates to a sheet package 14.
  • a Blechpa ⁇ ket 14 may be included 12 in a runner 11 and / or in a stator 15 of an electric machine.
  • the laminated core 14 has at least one first sheet metal part group 35 and at least one second sheet metal part group 36.
  • the first sheet metal subassembly 35 is formed by stacking a plurality of first sheet metal parts 10.
  • the second sheet metal part group 36 is formed by stacking a plurality of second sheet metal parts 13.
  • the two sheet metal subgroups 35, 36 are alternately arranged adjacent to one another in a stacking direction A.
  • Each first sheet metal part 10 has first teeth that protrude at right angles from a ⁇ Ver connecting part 18 to the stacking direction A away ⁇ and terminate at a free end of the twentieth
  • each second sheet-metal part 13 has second teeth 26 which, starting from a second connecting part 25, protrude at right angles to the stacking direction A and terminate at a free end 27.
  • the free ends 20 of the first teeth 19 have, from a common reference axis or reference plane, a first distance R1 different from the second distance R2 of the free ends 27 of the second teeth 26 from the common reference axis or reference plane.
  • a step 38 is therefore formed as seen in the stacking direction A. That way you can achieve a toothing of the rotor 11 with an associated stator 15 and increase the air gap L formed therebetween without increasing the axial dimension of the laminated cores 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

L'invention concerne un noyau feuilleté (14). Un noyau feuilleté (14) peut être contenu dans un rotor (11) et/ou dans un stator (15) d'une machine électrique (12). Le noyau feuilleté (14) comporte au moins un premier groupe d'éléments en tôle (35) et au moins un deuxième groupe d'éléments en tôle (36). Le premier groupe de tôle (35) est formé par empilement d'une pluralité de premiers éléments en tôle (10). Le deuxième groupe d'éléments en tôle (36) est formé par empilement d'une pluralité de deuxièmes éléments en tôle (13). Les deux groupes d'éléments en tôle (35, 36) sont disposés en alternance de façon adjacente les uns aux autres dans une direction d'empilement (A). Chaque premier élément en tôle (10) comporte des premières dents qui s'étendent depuis un élément de liaison (18) radialement à l'axe de rotation (M) et qui se terminent à une extrémité libre (20). De façon correspondante, chaque deuxième élément en tôle (13) comporte des deuxièmes dents (26) qui s'étendent depuis d'un deuxième élément de liaison (25) et qui se terminent à une extrémité libre (27). Les extrémités libres (20) des premières dents (19) se trouvent par rapport à l'axe de rotation (M) à une première distance qui est différente de la deuxième distance (R2) des extrémités libres (27) des deuxièmes dents (26) par rapport à l'axe de rotation (M). Un gradin (38) est donc formé entre un premier groupe d'éléments en tôle (35) et un deuxième groupe d'éléments en tôle (36), qui sont en appui les uns contre les autres. De cette manière, une denture peut être obtenue par le rotor (11) auquel est associé un stator (15) et l'espace d'air intermédiaire formé (L) peut être augmenté sans augmenter la dimension des noyaux feuilletés (14) dans la direction d'empilement (A).
EP15747109.5A 2014-08-07 2015-07-17 Noyau feuilleté d'un stator ou d'un rotor et machine électrique Withdrawn EP3178151A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014111239.3A DE102014111239B4 (de) 2014-08-07 2014-08-07 Blechpaket eines Stators oder eines Läufers sowie eine elektrische Maschine
PCT/EP2015/066487 WO2016020174A2 (fr) 2014-08-07 2015-07-17 Noyau feuilleté d'un stator ou d'un rotor et machine électrique

Publications (1)

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EP3178151A2 true EP3178151A2 (fr) 2017-06-14

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EP15747109.5A Withdrawn EP3178151A2 (fr) 2014-08-07 2015-07-17 Noyau feuilleté d'un stator ou d'un rotor et machine électrique

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US (1) US10367382B2 (fr)
EP (1) EP3178151A2 (fr)
CN (1) CN107078564B (fr)
DE (1) DE102014111239B4 (fr)
WO (1) WO2016020174A2 (fr)

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US10432044B2 (en) * 2015-11-02 2019-10-01 Denso Corporation Rotor including stacked cores, motor, method for manufacturing rotor, and method for manufacturing motor
JP6370863B2 (ja) * 2016-11-25 2018-08-08 ファナック株式会社 モータ用のステータの製造方法
DE102018213567B3 (de) 2018-08-13 2019-12-19 Bayerische Motoren Werke Aktiengesellschaft Rotor für fremderregte Innenläufer-Synchronmaschine, Innenläufer-Synchronmaschine, Kraftfahrzeug sowie Verfahren
EP3706288A1 (fr) 2019-03-06 2020-09-09 Siemens Aktiengesellschaft Noyau feuilleté pour une machine électrique
CN114793027A (zh) * 2022-06-21 2022-07-26 宁波震裕科技股份有限公司 一种抽拉式绕线的转子铁芯

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DE102014111239B4 (de) 2016-07-21
CN107078564B (zh) 2019-06-28
DE102014111239A1 (de) 2016-02-11
WO2016020174A2 (fr) 2016-02-11
US10367382B2 (en) 2019-07-30
CN107078564A (zh) 2017-08-18
US20170229929A1 (en) 2017-08-10
WO2016020174A3 (fr) 2016-07-28

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