FR2644947A3 - Stator of an electric motor - Google Patents
Stator of an electric motor Download PDFInfo
- Publication number
- FR2644947A3 FR2644947A3 FR9002031A FR9002031A FR2644947A3 FR 2644947 A3 FR2644947 A3 FR 2644947A3 FR 9002031 A FR9002031 A FR 9002031A FR 9002031 A FR9002031 A FR 9002031A FR 2644947 A3 FR2644947 A3 FR 2644947A3
- Authority
- FR
- France
- Prior art keywords
- stator
- laminated core
- blades
- electric motor
- recess
- 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.)
- Granted
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
- H02K1/16—Stator cores with slots for windings
-
- 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
- H02K2201/09—Magnetic cores comprising laminations characterised by being fastened by caulking
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Description
Stator d'un moteur électriaue."
L'invention concerne un stator d'un moteur électrique, comportant un noyau feuilleté constitué de lames superposées et qui, près de son bord périphérique, présente des trous destinés å recevoir des boulons pour serrer les lames.Stator of an electric motor. "
The invention relates to a stator of an electric motor, comprising a laminated core made up of superimposed blades and which, near its peripheral edge, has holes intended to receive bolts for tightening the blades.
Des stators de ce genre comportent généralement un noyau feuilleté dont les différentes lames sont essentiellement de forme carrée et présentent chacune un trou central pour le rotor. A proximité de ses angles, chaque lame du noyau feuilleté est egalement percée de trous par lesquels sont introduits les boulons usuels lors de la superposition des lames du noyau feuilleté. Ces boulons serrent lesdites lames les unes contre les autres pour former un noyau feuilleté statorique. Stators of this kind generally have a laminated core, the different blades of which are essentially square in shape and each have a central hole for the rotor. Close to its angles, each blade of the laminated core is also pierced with holes through which the usual bolts are introduced during the superposition of the blades of the laminated core. These bolts tighten said blades against each other to form a laminated stator core.
Le serrage de ces lames provoque certaines difficultés. A cet égard, le serrage des boulons a pour effet d'engendrer une pression localisée sur les régions du noyau feuilleté statorique a travers lesquelles sont passés les boulons. Bien que, d'une part, cette pression maintienne les lames réunies a proximité des bords dudit noyau feuilleté statorique, d'autre part, elle tend å laisser une empreinte dans le noyau feuilleté et a écarter les lames les unes des autres. Cela peut avoir pour effet d'augmenter la réluctance dans le circuit magnétique et, par conséquent, la dispersion du flux magnétique dans le stator ainsi que de produire un bruit gênant. Tightening these blades causes certain difficulties. In this regard, the tightening of the bolts has the effect of generating localized pressure on the regions of the stator laminated core through which the bolts have passed. Although, on the one hand, this pressure keeps the blades united near the edges of said stator laminated core, on the other hand, it tends to leave an imprint in the laminated core and to separate the blades from each other. This can have the effect of increasing the reluctance in the magnetic circuit and, consequently, the dispersion of the magnetic flux in the stator as well as producing an annoying noise.
Une solution a ce problème est décrite dans le document US-A- 4 348 607. Pour maintenir les lames les plus plates possibles, chaque trou est pratiqué près du bord angulaire du noyau feuilleté et, i proximité de chaque troui est formée une'fente traversant le noyau feuilleté. A solution to this problem is described in document US-A-4 348 607. To keep the blades as flat as possible, each hole is made near the angular edge of the laminated core and, near each hole is formed a slot. passing through the laminated core.
Toutefois, cela est une solution couteuse. However, this is an expensive solution.
A cet effet, l'invention vise à fournir un stator d'un moteur électrique permettant de résoudre les problèmes précités, et cela å un coût inférieur a celui de la solution décrite dans le document US-A- 4 348 607. To this end, the invention aims to provide a stator of an electric motor making it possible to solve the aforementioned problems, and this at a cost lower than that of the solution described in document US-A-4 348 607.
Conformément å l'invention, le stator d'un moteur électrique est caractérisé en ce que le noyau feuilleté est étampé pour former un évidement près de chaque trou, la profondeur dudit évidement allant en diminuant vers le bord périphérique. According to the invention, the stator of an electric motor is characterized in that the laminated core is stamped to form a recess near each hole, the depth of said recess decreasing towards the peripheral edge.
L'invention sera mieux comprise à l'aide de la description suivante en regard du dessin annexé, dans lequel:
La figure 1 est une vue en plan d'un stator réalise conformément a l'invention et
La figure 2 est une coupe suivant la ligne II II de la figure 1.The invention will be better understood using the following description with reference to the appended drawing, in which:
FIG. 1 is a plan view of a stator produced in accordance with the invention and
FIG. 2 is a section along line II II of FIG. 1.
En référence auxdites figures, un stator dont l'ensemble est indiqué par la référence 1 comporte un noyau feuilleté 2 défini par une pluralité de lames superposées 3. Sur la figure, le stator a une section transversale parallélépipédique ou sensiblement carrée et est percé d'un trou traversant 4 dont la paroi 5 présente des fentes statoriques 6. A proximité de ses angles 7, chaque lame présente des trous 8 pour recevoir des boulons 9 (représentés par des lignes en traits interrompus sur la figure 2). With reference to said figures, a stator, the assembly of which is indicated by the reference 1, comprises a laminated core 2 defined by a plurality of superimposed blades 3. In the figure, the stator has a rectangular or substantially square cross section and is pierced with a through hole 4, the wall 5 of which has stator slots 6. Near its angles 7, each blade has holes 8 for receiving bolts 9 (represented by dashed lines in Figure 2).
Après l'empilage des lames 3, ces trous 8 sont coaxiaux et permettent d'introduire les boulons 9 (munis de tetes 9A) pour serrer les lames et pour former le noyau feuilleté statorique 2. After stacking the blades 3, these holes 8 are coaxial and make it possible to introduce the bolts 9 (provided with heads 9A) to tighten the blades and to form the stator laminated core 2.
Conformement à l'invention, à proximité des régions angulaires 7 du noyau feuilleté statorique 2, dans lesquelles sont pratiqués lesdits trous 8, le noyau feuilleté est étampe de façon a former un évidement 10 d'une profondeur qui va en diminuant vers le bord périphérique 2A dudit noyau feuilleté, c'est-à-dire qu'elle va en augmentant vers le centre de celui-ci. La formation de cet évidement s'effectue d'une manière connue, par exemple par une presse ou des moyens analogues. Des bandes métalliques élastiques 11 maintiennent les lames assemblées au cours de la formation des évidements 10 et de l'introduction des boulons 9 dans les trous correspondants 8. Lors du serrage des boulons, les têtes 9A des boulons viennent exercer sur les parties inclinées des évidements 10 une pression dirigée vers le bas de façon & serrer ensemble les lames 3. Cette action ne tend ni à laisser une empreinte dans le paquet ni à augmenter l'intervalle entre lesdites lames dans la région située près du trou 4, ce qui a pour résultat d'éviter une augmentation de la réluctance dans le circuit magnétique statorique et, par conséquent, d'exclure une dispersion du flux magnétique et une augmentation du bruit. According to the invention, near the angular regions 7 of the stator laminated core 2, in which said holes 8 are made, the laminated core is stamped so as to form a recess 10 of a depth which decreases towards the peripheral edge. 2A of said laminated core, that is to say that it increases towards the center of the latter. The formation of this recess is carried out in a known manner, for example by a press or the like. Elastic metal bands 11 hold the blades assembled during the formation of the recesses 10 and the introduction of the bolts 9 into the corresponding holes 8. When tightening the bolts, the heads 9A of the bolts come to act on the inclined parts of the recesses 10 a pressure directed downwards so as to clamp the blades 3 together. This action does not tend either to leave an imprint in the packet or to increase the interval between said blades in the region situated near the hole 4, which has for result of avoiding an increase in the reluctance in the stator magnetic circuit and, consequently, in excluding a dispersion of the magnetic flux and an increase in noise.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT8919508A IT1228843B (en) | 1989-02-21 | 1989-02-21 | PROCEDURE FOR THE IMPLEMENTATION OF AN STATOR OF AN ELECTRIC MOTOR, IN PARTICULAR OF A COMPRESSOR, AND STATOR SO OBTAINED. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2644947A3 true FR2644947A3 (en) | 1990-09-28 |
FR2644947B3 FR2644947B3 (en) | 1991-03-15 |
Family
ID=11158620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR909002031A Expired - Lifetime FR2644947B3 (en) | 1989-02-21 | 1990-02-20 | STATOR OF AN ELECTRIC MOTOR |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE9001472U1 (en) |
ES (1) | ES1013234Y (en) |
FR (1) | FR2644947B3 (en) |
IT (1) | IT1228843B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITTO20110142A1 (en) * | 2011-02-18 | 2012-08-19 | Embraco Europ Srl | ELECTRIC MOTOR STATOR AND ITS PRODUCTION PROCEDURE |
-
1989
- 1989-02-21 IT IT8919508A patent/IT1228843B/en active
-
1990
- 1990-02-09 DE DE9001472U patent/DE9001472U1/en not_active Expired - Lifetime
- 1990-02-19 ES ES19909000529U patent/ES1013234Y/en not_active Expired - Fee Related
- 1990-02-20 FR FR909002031A patent/FR2644947B3/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
IT8919508A0 (en) | 1989-02-21 |
IT1228843B (en) | 1991-07-05 |
DE9001472U1 (en) | 1990-04-12 |
FR2644947B3 (en) | 1991-03-15 |
ES1013234U (en) | 1990-11-16 |
ES1013234Y (en) | 1991-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2467502A1 (en) | Electric starter motor rotor winding for vehicle - has minimal depth slots with offset conductors to minimise flux distortion | |
FR2793085A1 (en) | Vehicle alternator assembly, utilises opposing conical polar sections mounted around the rotor and stator assemblies | |
EP1138879A1 (en) | Turbine blade rotor disc assembly with fir-tree turbine blade root and assembly method therefore | |
EP0117991B1 (en) | Cutting tool with exchangeable cutting bits | |
FR2685814A1 (en) | IMPROVED CONDUCTOR FRAME CUTTING DEVICE FOR INTEGRATED CIRCUIT BOXES AND PREPARATION METHOD. | |
FR2856531A1 (en) | DEVICE FOR FIXING PERMANENT MAGNETS WITHIN A CYLINDER HEAD OF AN ELECTRIC MOTOR INDUCER | |
FR2531751A1 (en) | IGNITION COIL FOR INTERNAL COMBUSTION ENGINE | |
EP0211741A1 (en) | Block junction with lateral connection | |
FR2644947A3 (en) | Stator of an electric motor | |
FR2470468A1 (en) | APPARATUS EQUIPPED WITH AN ELECTRIC MOTOR AND COMPRISING TWO HOUSING SHELLS INCLUDING AN ENGINE SUPPORT OFFICE | |
EP0358562A1 (en) | Shielded connector housing | |
FR2808618A1 (en) | CIRCUIT BREAKER COMPRISING, IN AN ENCLOSURE FILLED WITH A DIELECTRIC GAS UNDER PRESSURE, A MOBILE ASSEMBLY | |
FR2675953A1 (en) | CONNECTING ARRANGEMENT FOR ELECTRIC WIRES AND CONNECTING PART FOR SUCH ARRANGEMENT. | |
FR2559856A1 (en) | TIGHTENING COLLAR AND MANUFACTURING METHOD THEREOF | |
FR2514962A1 (en) | SEMICONDUCTOR VOLTAGE REGULATOR COMBINED WITH BRUSH SUPPORT, PARTICULARLY FOR THREE-PHASE CURRENT GENERATOR | |
EP0317462B1 (en) | Staple-removing device, and method for its manufacture | |
FR2685815A1 (en) | CONDUCTOR FRAME CUTTING DEVICE FOR INTEGRATED CIRCUIT BOXES OF VARIOUS DIMENSIONS AND METHOD FOR PREPARING THE SAME. | |
FR2611323A1 (en) | ROTOR OF ELECTRIC ROTATING MACHINE | |
EP0532413B1 (en) | Self-stripping contact | |
FR2579834A1 (en) | TULIP TYPE CONTACT FOR INTEGRATED CIRCUIT SUPPORT | |
FR2557743A1 (en) | Permanent magnet field poles for motor-generator | |
FR2559967A1 (en) | Skew notch wedge. | |
FR2722438A1 (en) | PACKET OF CUT SHEETS FOR THE MANUFACTURE OF UNROTOR | |
EP0041000A1 (en) | Rotating electrical machine with assembled stator | |
FR2488749A1 (en) | Magnetic mounting for electric starter motor - uses section of motor casing forced into dove-tail shaped hole in outer surface of magnet |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
CD | Change of name or company name |