EP3613128A1 - External rotor motor with cast stator - Google Patents

External rotor motor with cast stator

Info

Publication number
EP3613128A1
EP3613128A1 EP18721946.4A EP18721946A EP3613128A1 EP 3613128 A1 EP3613128 A1 EP 3613128A1 EP 18721946 A EP18721946 A EP 18721946A EP 3613128 A1 EP3613128 A1 EP 3613128A1
Authority
EP
European Patent Office
Prior art keywords
stator
rotor
bearing
axis
rotation
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.)
Pending
Application number
EP18721946.4A
Other languages
German (de)
French (fr)
Inventor
Volker Grabs
Matthias Theßeling
Olaf Hübner
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.)
Lenze SE
Original Assignee
Lenze Drives 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 Lenze Drives GmbH filed Critical Lenze Drives GmbH
Publication of EP3613128A1 publication Critical patent/EP3613128A1/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1737—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/187—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to inner stators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/08—Insulating casings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • H02K7/088—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly radially supporting the rotor directly
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates

Definitions

  • the invention relates to an electrical machine according to the preamble of claim 1.
  • Electric machines of the type in question have a stator, d. H. a fixed element, and a rotor, d. H. a relative to the fixed member about an axis of rotation rotatably mounted element on.
  • the electrical machine is used to convert electrical energy into mechanical work.
  • H are generated by means of electrical energy magnetic fields, which in turn enable the rotor relative to the stator in rotation.
  • the magnetic fields are generated by means of a coil winding of the stator.
  • the coil winding is regularly embedded in a potting compound.
  • the potting compound completely or partially surround the coil winding.
  • the potting compound typically serves to protect the coil winding against mechanical damage in particular.
  • Such electrical machines are referred to in particular as external rotor motors. In external rotor motors, the rotor surrounds the stator.
  • stator can absorb mechanical forces acting on the rotor.
  • the mechanical forces are introduced here via the rotatable mounting of the rotor in the stator.
  • Such electrical machines are regularly attached to a fixed structure with their stator.
  • the rotatable rotor can then, for example via a toothing, transmit its rotary motion directly to a transmission.
  • reaction forces arise can be introduced via the rotatable mounting of the rotor in the stator. It is understood that any other applications are conceivable in which appropriate forces are introduced via the rotor in the stator.
  • Electric machines of the type in question are basically characterized by the fact that they can be used to implement solutions with comparatively small space requirements. Therefore, such electrical machines are used for example in the model area.
  • the rotor In order to be able to introduce mechanical forces via the bearing of the rotor into the stator, the rotor according to the prior art is mounted on a shaft. This shaft is guided by the stator. Between the shaft and the stator is the rotatable mounting of the rotor. Typically, the rotor, which surrounds the stator, is connected to the axis of rotation at one end of the electric machine-in the axial direction with respect to the axis of rotation. The other end of the electric machine in the axial direction with respect to the axis of rotation is regularly available for fastening the stator to a structure fixed relative to the electrical machine.
  • the invention is therefore based on the object to show an electric machine that allows a more compact design.
  • the electric machine has a first bearing seat element arranged between the potting compound and a first bearing for the rotatable mounting of the rotor for providing a bearing seat for a first bearing of the bearing of the rotor.
  • a bearing seat member has the advantage that it can provide a bearing seat of better quality.
  • the bearing seat is formed by the potting compound itself. Such a bearing seat can then be generated, for example, after curing of the potting compound by turning.
  • the use of a bearing seat element has the particular advantage that the bearing seat element can be produced from a material which is particularly suitable for providing a bearing seat and which is different from the casting compound. For this purpose, preference is given to metallic materials.
  • the bearing seat element is particularly preferably made of aluminum.
  • such a bearing seat element can also have an advantageous effect on the introduction of force into the potting compound.
  • a second bearing seat element for providing a second bearing seat for a second bearing for supporting the rotor.
  • Such a second bearing seat element in connection with the second bearing has the advantage that a mechanically favorable bearing of the rotor on the stator can be achieved via two bearings.
  • a bearing seat element it is also possible for a bearing seat element to provide a plurality of bearing seats for a plurality of bearings.
  • the bearing seat element can serve to the advantageously as a lost mold when introducing the potting compound. In this way, a potted stator according to the invention can be produced with a bearing seat element in a particularly simple manner.
  • the first and / or second bearing seat element can be designed strichschalenförmig ig.
  • Such a design of the bearing seat member is in view of a compact design of the electric machine and a favorable force in the stator advantage.
  • the electric machine preferably has a stator pack.
  • a stator package is in particular one of a plurality
  • Sheet metal formed body which forms the core of the coil winding.
  • the individual sheet metal layers are preferably electrically insulated from one another in order to prevent or at least reduce the formation of eddy currents in the stator core.
  • the stator is also at least partially surrounded by the potting compound. It is particularly advantageous if the rotor-facing, with respect to the axis of rotation outermost surfaces of the stator are surrounded by the potting compound.
  • the potting compound thus also provides protection of the stator packet from mechanical impairments, and on the other hand, the introduction of the mechanical forces via the potting compound directly into the outer regions of the stator packet-which has a comparatively high mechanical load-is made possible in a direct way.
  • the electric machine according to the invention can be developed in an advantageous manner such that a first winding head is at least partially disposed in a region about the axis of rotation, which is in the radial Direction from the axis of rotation away from 0 to 40% of the distance of the farthest from the axis of rotation point of the coil winding extends from the axis of rotation.
  • a first winding head is at least partially disposed in a region about the axis of rotation, which is in the radial Direction from the axis of rotation away from 0 to 40% of the distance of the farthest from the axis of rotation point of the coil winding extends from the axis of rotation.
  • a winding overhang is to be understood as meaning, in particular, the section of a coil winding which projects out of the stator pack in the axial direction.
  • the coil winding may have a first winding head and / or a second winding head, which is arranged on the end of the stator packet opposite the first winding head in the axial direction.
  • the second winding head can also be arranged partially in an advantageous manner in a region about the axis of rotation which extends from the axis of rotation away from 0 to 40% of the distance of the farthest point of the coil winding from the axis of rotation.
  • first winding head and / or the second winding head of the coil winding is at least partially disposed in a region about the axis of rotation which is in the radial direction away from the axis of rotation from 0 to 20% of the distance of the point furthest from the axis of rotation the coil winding extends from the axis of rotation. In this way, the winding head can be made very compact.
  • the first winding head is arranged in the axial direction with respect to the axis of rotation at least partially in the region of the first bearing seat. In other words, this means that an overlap of the first bearing seat and the coil winding results in the axial direction. This advantageously enables a shortening of the space requirement of the electric machine according to the invention in the axial direction.
  • the second winding head this can also be arranged in the axial direction with respect to the axis of rotation to the partially partially in the region of the second bearing seat.
  • the first bearing is partly arranged at a greater distance from the axis of rotation than the first winding head.
  • the machine according to the invention makes it possible in particular to design the machine according to the invention in an advantageous manner so that the first bearing surrounds the first winding head. This measure also leads to a particularly compact design.
  • the second bearing can be arranged corresponding to the partially partially at a greater distance from the axis of rotation than the second winding head. The invention will be explained in more detail below with reference to FIG.
  • FIG. 1 shows a schematic representation of an exemplary electrical machine according to the invention.
  • the exemplary electric machine 1 shown in FIG. 1 is an external rotor motor. This has a stator 2 and a rotor 3.
  • the rotor 3 surrounds the stator 2.
  • the rotor 3 is rotatably mounted about the rotation axis X relative to the stator 2.
  • the first bearing 4 and second bearing 5 serve in the example shown, the first bearing 4 and second bearing 5.
  • the bearings 4 and 5 are exemplified as a ball bearing.
  • the electric machine 1 is designed in such a way that mechanical forces can be transmitted from the rotor 3 to the stator 2 via the bearing of the rotor 3 by means of the first bearing 4 and the second bearing 5.
  • the exemplary electric machine 1 further comprises a coil winding 6.
  • the coil winding 6 serves to generate a magnetic field.
  • the coil winding 6 is surrounded by a potting compound 7.
  • the mechanical forces transmitted by the bearing of the rotor 3 and received by the stator 2 are at least partially transmitted via the casting compound. se 7 introduced into the stator 2.
  • the forces transmitted by the bearing of the rotor 3, that is to say in the example shown by the first bearing 4 and the second bearing 5 are introduced into the stator 2 via the potting compound 7.
  • the introduction of the forces takes place in an advantageous manner via a first bearing seat element 8, which provides a bearing seat for the first bearing 4, and a second bearing seat element 9, which provides a bearing seat for the second bearing 5.
  • the bearing seat elements 8 and 9 are designed in the example shown in an advantageous manner substantially strichschalenförmig ig.
  • the bearing seat elements 8 and 9 are preferably made of a metal, particularly preferably of aluminum.
  • the exemplary electric machine 1 also has a stator 1 0 on.
  • the stator 1 0 is also at least partially surrounded by the potting compound 7. It is particularly advantageous in the case of the exemplary electric machine 1 that the surfaces 1 1 of the stator packet 1 0 facing the rotor 3 are also surrounded by the potting compound 7.
  • the surfaces 1 1 are the outermost surfaces of the stator packet 10 relative to the axis of rotation X.
  • the coil winding 6 of the exemplary electric machine 1 has a first winding head 12 and a second winding head 1 3.
  • the first winding head 12 and the second winding head 1 3 are surrounded by the potting compound 7.
  • the first winding head 12 and the second winding head 1 3 are partially disposed in a region about the axis of rotation X, which in the radial direction Y from the axis of rotation X away from 0 to 40% of the distance of the farthest from the axis of rotation X point of Coil winding 6 extends from the axis of rotation X.
  • a space area near the rotation axis X can be used for accommodating the winding heads 12 and 13, resulting in particularly compact design of the exemplary electric machine 1 contributes.
  • the first winding head 12 is advantageously arranged partially in the region of the bearing seat of the first bearing 4.
  • the second winding head 1 3 is arranged in the axial direction with respect to the axis of rotation X partially in the region of the bearing seat of the second bearing 5.
  • this has the advantage of a comparatively short length of the electric machine 1 in the direction of the axis of rotation X with it.
  • the first bearing 4 is arranged at a greater distance from the axis of rotation X than the first winding head 12.
  • the second bearing 5 is also in one greater distance from the axis of rotation X arranged as the second winding head 1 third
  • the rotor 3 of the exemplary electric machine 1 advantageously has a plurality of permanent magnets 14.
  • the permanent magnets 14 cooperate with the magnetic field generated by the coil winding 6 and thus generate the rotational movement of the rotor 3 relative to the stator 2.
  • the stator 2 of the exemplary electric machine 1 quasi assume the function of the axis of a conven- union electric machine itself, so that the overall result is the desired compact design. LIST OF REFERENCE NUMBERS

Abstract

The electric machine (1) is an external rotor motor with a stator (2, 6 ,7, 8, 9, 10, 11) and a rotor (3, 14) surrounding the stator. The rotor is mounted on bearings (4, 5) so as to be rotatable around an axis of rotation relative to the stator, wherein the mechanical forces transmitted by the bearings of the rotor are absorbed at least in part by the stator (2). The stator (2) has a coil winding (6) for generating a magnetic field, the coil winding (6) being surrounded at least partially by a casting compound (7). At the output, the mechanical forces of the rotor (3) or the device transmitted by the bearings (4, 5) and taken up by the stator (2) are introduced into the stator (2) largely via the casting compound (7). The casting compound thus reduces induced vibrations.

Description

AUSSENLÄUFERMOTOR MIT VERGOSSENEM STATOR  OUTER RUNNING ENGINE WITH GATED STATOR
Beschreibung description
Die Erfindung betrifft eine elektrische Maschine nach dem Oberbegriff des Anspruchs 1 . The invention relates to an electrical machine according to the preamble of claim 1.
Elektrische Maschinen der in Rede stehenden Art weisen einen Stator, d. h. ein feststehendes Element, sowie einen Rotor, d. h. ein relativ zu dem feststehenden Element um eine Drehachse drehbar gelagertes Element, auf. Die elektrische Maschine dient der Umwandlung elektrischer Energie in me- chanische Arbeit. H ierbei werden mittels der elektrischen Energie magnetische Felder erzeugt, die wiederum den Rotor relativ zum Stator in Drehung versetzen. Die magnetischen Felder werden m ittels einer Spulenwicklung des Stators erzeugt. Die Spulenwicklung wird regelmäßig in eine Vergussmasse eingebettet. Hierbei kann die Vergussmasse die Spulenwicklung vollständig oder teilweise umgeben. Die Vergussmasse dient typischerweise dem Schutz der Spulenwicklung vor insbesondere mechanischen Beeinträchtigungen. Derartige elektrische Maschinen werden insbesondere auch als Außenläufermotoren bezeichnet. Bei Außenläufermotoren umgibt der Rotor den Stator. Electric machines of the type in question have a stator, d. H. a fixed element, and a rotor, d. H. a relative to the fixed member about an axis of rotation rotatably mounted element on. The electrical machine is used to convert electrical energy into mechanical work. H here are generated by means of electrical energy magnetic fields, which in turn enable the rotor relative to the stator in rotation. The magnetic fields are generated by means of a coil winding of the stator. The coil winding is regularly embedded in a potting compound. Here, the potting compound completely or partially surround the coil winding. The potting compound typically serves to protect the coil winding against mechanical damage in particular. Such electrical machines are referred to in particular as external rotor motors. In external rotor motors, the rotor surrounds the stator.
Aus dem Stand der Technik sind elektrische Maschinen der in Rede stehenden Art bekannt, bei denen der Stator mechanische Kräfte, die auf den Rotor wirken, aufnehmen kann. Die mechanischen Kräfte werden hierbei über die drehbare Lagerung des Rotors in den Stator eingeleitet. Derartige elektrische Maschinen werden regelmäßig m it ihrem Stator an einer feststehenden Struktur befestigt. Der drehbare Rotor kann dann, beispielsweise über eine Verzahnung, seine Drehbewegung direkt an ein Getriebe übertragen. In einem derartigen Anwendungsfall entstehen Reaktionskräfte, die über die drehbare Lagerung des Rotors in den Stator eingeleitet werden können. Es versteht sich, dass auch beliebige andere Anwendungsfälle denkbar sind, bei denen entsprechende Kräfte über den Rotor in den Stator eingeleitet werden. From the prior art electrical machines of the type in question are known in which the stator can absorb mechanical forces acting on the rotor. The mechanical forces are introduced here via the rotatable mounting of the rotor in the stator. Such electrical machines are regularly attached to a fixed structure with their stator. The rotatable rotor can then, for example via a toothing, transmit its rotary motion directly to a transmission. In such an application, reaction forces arise can be introduced via the rotatable mounting of the rotor in the stator. It is understood that any other applications are conceivable in which appropriate forces are introduced via the rotor in the stator.
Elektrische Maschinen der in Rede stehenden Art zeichnen sich grundsätzlich dadurch aus, dass sich m it ihnen Lösungen m it vergleichsweise geringem Bauraumbedarf realisieren lassen. Daher kommen derartige elektrische Maschinen beispielsweise im Modellbaubereich zum Einsatz. Electric machines of the type in question are basically characterized by the fact that they can be used to implement solutions with comparatively small space requirements. Therefore, such electrical machines are used for example in the model area.
Um mechanische Kräfte über die Lagerung des Rotors in den Stator einleiten zu können, ist der Rotor nach dem Stand der Technik auf einer Welle befestigt. Diese Welle wird durch den Stator geführt. Zwischen der Welle und dem Stator befindet sich die drehbare Lagerung des Rotors. Typi- scherweise ist der Rotor, der den Stator umgibt, an einem Ende der elektrischen Maschine - in axialer Richtung bezogen auf die Drehachse - mit der Drehachse verbunden. Das andere Ende der elektrischen Maschine in axialer Richtung bezogen auf die Drehachse steht regelmäßig für die Befestigung des Stators an einer relativ zu der elektrischen Maschine feststehen- den Struktur zur Verfügung. In order to be able to introduce mechanical forces via the bearing of the rotor into the stator, the rotor according to the prior art is mounted on a shaft. This shaft is guided by the stator. Between the shaft and the stator is the rotatable mounting of the rotor. Typically, the rotor, which surrounds the stator, is connected to the axis of rotation at one end of the electric machine-in the axial direction with respect to the axis of rotation. The other end of the electric machine in the axial direction with respect to the axis of rotation is regularly available for fastening the stator to a structure fixed relative to the electrical machine.
Durch die durch den Stator hindurchgeführte Welle des Rotors und die damit verbundene drehbare Lagerung der Welle entsteht jedoch ein gewisser Bauraumbedarf. Due to the guided through the stator shaft of the rotor and the associated rotatable mounting of the shaft, however, creates a certain space requirement.
Der Erfindung liegt daher die Aufgabe zugrunde, eine elektrische Maschine aufzuzeigen, die eine kompaktere Bauweise ermöglicht. The invention is therefore based on the object to show an electric machine that allows a more compact design.
Die Aufgabe wird gelöst durch eine elektrische Maschine m it den Merkma- len des unabhängigen Anspruchs 1 . Die Merkmale der abhängigen Ansprüche betreffen vorteilhafte Ausführungsformen. Erfindungsgemäß ist vorgesehen, dass die über die Lagerung des Rotors übertragenen Kräfte, die vom Stator aufgenommen werden, zum indest teilweise über die Vergussmasse in den Stator eingeleitet werden. Die Einleitung der mechanischen Kräfte über die Vergussmasse erlaubt es, die Lage- rung zwischen Stator und Rotor nach außen zu verlagern. Es versteht sich, dass in vorteilhafter Weise auch sämtliche mechanischen Kräfte, die vom Rotor über seine Lagerung in den Stator eingeleitet werden, über die Vergussmasse in den Stator eingeleitet werden können. Es ist vorteilhaft, wenn die elektrische Maschine ein zwischen der Vergussmasse und einem ersten Lager zur drehbaren Lagerung des Rotors angeordnetes erstes Lagersitzelement zur Bereitstellung eines Lagersitzes für ein erstes Lager der Lagerung des Rotors aufweist. Ein derartiges Lagersitzelement bietet den Vorteil, dass es einen Lagersitz von besserer Qualität bereitstellen kann. Alternativ ist es selbstverständlich auch möglich, dass der Lagersitz durch die Vergussmasse selbst gebildet wird. Ein derartiger Lagersitz kann dann beispielsweise nach dem Aushärten der Vergussmasse durch Drehen erzeugt werden. Die Verwendung eines Lagersitzelements hat jedoch insbesondere den Vorteil, dass das Lagersitze- lement aus einem für die Bereitstellung eines Lagersitzes besonders geeigneten Werkstoff hergestellt werden kann, der von der Vergussmasse verschieden ist. Hierfür bieten sich bevorzugt metallische Werkstoffe an. Besonders bevorzugt ist das Lagersitzelement aus Alum inium . Zudem kann sich ein derartiges Lagersitzelement auch vorteilhaft auf die Krafteinleitung in die Vergussmasse auswirken. The object is achieved by an electric machine with the features of independent claim 1. The features of the dependent claims relate to advantageous embodiments. According to the invention, it is provided that the forces transmitted via the bearing of the rotor, which are absorbed by the stator, are partially introduced to the stator via the potting compound. The introduction of the mechanical forces via the casting compound makes it possible to shift the bearing between the stator and the rotor to the outside. It is understood that in an advantageous manner, all the mechanical forces that are introduced from the rotor via its storage in the stator, can be introduced via the potting compound in the stator. It is advantageous if the electric machine has a first bearing seat element arranged between the potting compound and a first bearing for the rotatable mounting of the rotor for providing a bearing seat for a first bearing of the bearing of the rotor. Such a bearing seat member has the advantage that it can provide a bearing seat of better quality. Alternatively, it is of course also possible that the bearing seat is formed by the potting compound itself. Such a bearing seat can then be generated, for example, after curing of the potting compound by turning. However, the use of a bearing seat element has the particular advantage that the bearing seat element can be produced from a material which is particularly suitable for providing a bearing seat and which is different from the casting compound. For this purpose, preference is given to metallic materials. The bearing seat element is particularly preferably made of aluminum. In addition, such a bearing seat element can also have an advantageous effect on the introduction of force into the potting compound.
Es kann vorteilhaft sein, ein zweites Lagersitzelement zur Bereitstellung eines zweiten Lagersitzes für ein zweites Lager zur Lagerung des Rotors vorzusehen. Ein derartiges zweites Lagersitzelement hat in Verbindung mit dem zweiten Lager den Vorteil, dass über zwei Lager eine mechanisch günstige Lagerung des Rotors auf dem Stator erreicht werden kann. Alternativ ist es auch möglich, dass ein Lagersitzelement eine Mehrzahl Lagersitze für eine Mehrzahl Lager bereitstellt. Bei der Herstellung der elektrischen Maschine, insbesondere bei der Herstellung des Stators der elektrischen Maschine, kann das Lagersitzelement zu dem in vorteilhafter Weise als verlorene Gussform beim Einbringen der Vergussmasse dienen. Auf diese Weise lässt sich ein erfindungsgemäßer vergossener Stator mit einem Lagersitzelement in besonders einfacher Weise herstellen. It may be advantageous to provide a second bearing seat element for providing a second bearing seat for a second bearing for supporting the rotor. Such a second bearing seat element in connection with the second bearing has the advantage that a mechanically favorable bearing of the rotor on the stator can be achieved via two bearings. Alternatively, it is also possible for a bearing seat element to provide a plurality of bearing seats for a plurality of bearings. In the production of the electric machine, in particular in the manufacture of the stator of the electric machine, the bearing seat element can serve to the advantageously as a lost mold when introducing the potting compound. In this way, a potted stator according to the invention can be produced with a bearing seat element in a particularly simple manner.
In vorteilhafter Weise kann das erste und/oder zweite Lagersitzelement halbschalenförm ig gestaltet sein. Eine derartige Gestaltung des Lagersitzelements ist im Hinblick auf eine kompakte Bauweise der elektrischen Maschine und eine günstige Krafteinleitung in den Stator von Vorteil. Advantageously, the first and / or second bearing seat element can be designed halbschalenförmig ig. Such a design of the bearing seat member is in view of a compact design of the electric machine and a favorable force in the stator advantage.
Die elektrische Maschine weist bevorzugt ein Statorpaket auf. Bei einem Statorpaket handelt es sich insbesondere um einen aus einer VielzahlThe electric machine preferably has a stator pack. A stator package is in particular one of a plurality
Blechschichten gebildeten Körper, der den Kern der Spulenwicklung bildet. Die einzelnen Blechschichten sind bevorzugt gegeneinander elektrisch isoliert, um die Bildung von Wirbelströmen im Statorpaket zu verhindern oder zumindest zu reduzieren. Sheet metal formed body, which forms the core of the coil winding. The individual sheet metal layers are preferably electrically insulated from one another in order to prevent or at least reduce the formation of eddy currents in the stator core.
Bevorzugt ist das Statorpaket ebenfalls zumindest teilweise von der Vergussmasse umgeben. Hierbei ist es besonders vorteilhaft, wenn die zum Rotor weisenden, bezogen auf die Drehachse äußersten Flächen des Statorpakets von der Vergussmasse umgeben sind. Zum einen bietet die Vergussmasse so auch einen Schutz des Statorpakets von mechanischen Beeinträchtigungen, zum anderen ist so die Einleitung der mechanischen Kräfte über die Vergussmasse direkt in die äußeren Bereiche des Statorpakets - welches über eine vergleichsweise hohe mechanische Belastbarkeit verfügt - auf direktem Wege ermöglicht. Preferably, the stator is also at least partially surrounded by the potting compound. It is particularly advantageous if the rotor-facing, with respect to the axis of rotation outermost surfaces of the stator are surrounded by the potting compound. On the one hand, the potting compound thus also provides protection of the stator packet from mechanical impairments, and on the other hand, the introduction of the mechanical forces via the potting compound directly into the outer regions of the stator packet-which has a comparatively high mechanical load-is made possible in a direct way.
Die erfindungsgemäße elektrische Maschine kann in vorteilhafter Weise derart weitergebildet werden, dass ein erster Wickelkopf zumindest teilweise in einem Bereich um die Drehachse angeordnet ist, der sich in radialer Richtung von der Drehachse weg von 0 bis 40 % des Abstands des von der Drehachse entferntesten Punktes der Spulenwicklung von der Drehachse erstreckt. Eine solche Anordnung des Wickelkopfs der Spulenwicklung ermöglicht eine besonders kompakte Ausgestaltung derselben. The electric machine according to the invention can be developed in an advantageous manner such that a first winding head is at least partially disposed in a region about the axis of rotation, which is in the radial Direction from the axis of rotation away from 0 to 40% of the distance of the farthest from the axis of rotation point of the coil winding extends from the axis of rotation. Such an arrangement of the winding head of the coil winding allows a particularly compact design of the same.
Unter einem Wickelkopf ist in diesem Zusammenhang insbesondere der Abschnitt einer Spulenwicklung zu verstehen, der in axialer Richtung aus dem Statorpaket hervortritt. Hierbei kann die Spulenwicklung einen ersten Wickelkopf und/oder einen zweiten Wickelkopf, der an dem dem ersten Wi- ckelkopf in axialer Richtung gegenüberliegenden Ende des Statorpakets angeordnet ist, aufweisen. Auch der zweite Wickelkopf kann in vorteilhafter Weise zum indest teilweise in einem Bereich um die Drehachse angeordnet sein, der sich von der Drehachse weg von 0 bis 40 % des Abstands des von der Drehachse entferntesten Punktes der Spulenwicklung von der Drehach- se erstreckt. In this context, a winding overhang is to be understood as meaning, in particular, the section of a coil winding which projects out of the stator pack in the axial direction. In this case, the coil winding may have a first winding head and / or a second winding head, which is arranged on the end of the stator packet opposite the first winding head in the axial direction. The second winding head can also be arranged partially in an advantageous manner in a region about the axis of rotation which extends from the axis of rotation away from 0 to 40% of the distance of the farthest point of the coil winding from the axis of rotation.
Besonders vorteilhaft ist es, wenn der erste Wickelkopf und/oder der zweite Wickelkopf der Spulenwicklung zumindest teilweise in einem Bereich um die Drehachse angeordnet ist, der sich in radialer Richtung von der Drehachse weg von 0 bis 20 % des Abstands des von der Drehachse entferntesten Punktes der Spulenwicklung von der Drehachse erstreckt. Auf diese Weise kann der Wickelkopf besonders kompakt gestaltet werden. It is particularly advantageous if the first winding head and / or the second winding head of the coil winding is at least partially disposed in a region about the axis of rotation which is in the radial direction away from the axis of rotation from 0 to 20% of the distance of the point furthest from the axis of rotation the coil winding extends from the axis of rotation. In this way, the winding head can be made very compact.
Im Zusammenhang m it der vorliegenden Erfindung ist es weiterhin vorteil- haft, wenn der erste Wickelkopf in axialer Richtung bezogen auf die Drehachse zumindest teilweise im Bereich des ersten Lagersitzes angeordnet ist. Mit anderen Worten bedeutet dies, dass sich in axialer Richtung eine Überschneidung des ersten Lagersitzes und der Spulenwicklung ergibt. Dies ermöglicht in vorteilhafter Weise eine Verkürzung des Bauraumbedarfs der erfindungsgemäßen elektrischen Maschine in axialer Richtung. Gleiches gilt für den zweiten Wickelkopf, dieser kann ebenfalls in axialer Richtung bezogen auf die Drehachse zum indest teilweise im Bereich des zweiten Lagersitzes angeordnet sein. Weiterhin ist es vorteilhaft, wenn das erste Lager zum indest teilweise in einem größeren Abstand von der Drehachse angeordnet ist als der erste Wickelkopf. Dies ermöglicht es insbesondere, die erfindungsgemäße Maschine in vorteilhafter Weise so zu gestalten, dass das erste Lager den ersten Wi- ckelkopf umgibt. Auch diese Maßnahme führt zu einer besonders kompakten Bauweise. Weiterhin kann selbstverständlich das zweite Lager entsprechend zum indest teilweise in einem größeren Abstand von der Drehachse angeordnet sein als der zweite Wickelkopf. Die Erfindung wird im Folgenden anhand der Figur 1 schematisch näher erläutert. In connection with the present invention, it is also advantageous if the first winding head is arranged in the axial direction with respect to the axis of rotation at least partially in the region of the first bearing seat. In other words, this means that an overlap of the first bearing seat and the coil winding results in the axial direction. This advantageously enables a shortening of the space requirement of the electric machine according to the invention in the axial direction. The same applies to the second winding head, this can also be arranged in the axial direction with respect to the axis of rotation to the partially partially in the region of the second bearing seat. Furthermore, it is advantageous if the first bearing is partly arranged at a greater distance from the axis of rotation than the first winding head. This makes it possible in particular to design the machine according to the invention in an advantageous manner so that the first bearing surrounds the first winding head. This measure also leads to a particularly compact design. Furthermore, of course, the second bearing can be arranged corresponding to the partially partially at a greater distance from the axis of rotation than the second winding head. The invention will be explained in more detail below with reference to FIG.
Fig. 1 zeigt eine schematische Darstellung einer beispielhaften erfindungsgemäßen elektrischen Maschine. 1 shows a schematic representation of an exemplary electrical machine according to the invention.
Bei der in Fig. 1 abgebildeten beispielhaften elektrischen Maschine 1 handelt es sich um einen Außenläufermotor. Dieser weist einen Stator 2 und einen Rotor 3 auf. Der Rotor 3 umgibt den Stator 2. Der Rotor 3 ist um die Drehachse X relativ zum Stator 2 drehbar gelagert. Zur drehbaren Lagerung dienen im gezeigten Beispiel das erste Lager 4 und zweite Lager 5. Die Lager 4 und 5 sind beispielhaft als Kugellager ausgeführt. The exemplary electric machine 1 shown in FIG. 1 is an external rotor motor. This has a stator 2 and a rotor 3. The rotor 3 surrounds the stator 2. The rotor 3 is rotatably mounted about the rotation axis X relative to the stator 2. For rotatable mounting serve in the example shown, the first bearing 4 and second bearing 5. The bearings 4 and 5 are exemplified as a ball bearing.
Die elektrische Maschine 1 ist derart ausgebildet, dass über die Lagerung des Rotors 3 m ittels des ersten Lagers 4 und des zweiten Lagers 5 mecha- nische Kräfte vom Rotor 3 auf den Stator 2 übertragen werden können. The electric machine 1 is designed in such a way that mechanical forces can be transmitted from the rotor 3 to the stator 2 via the bearing of the rotor 3 by means of the first bearing 4 and the second bearing 5.
Die beispielhafte elektrische Maschine 1 weist ferner eine Spulenwicklung 6 auf. Die Spulenwicklung 6 dient der Erzeugung eines magnetischen Feldes. Die Spulenwicklung 6 ist von einer Vergussmasse 7 umgeben. The exemplary electric machine 1 further comprises a coil winding 6. The coil winding 6 serves to generate a magnetic field. The coil winding 6 is surrounded by a potting compound 7.
Erfindungsgemäß werden bei der beispielhaften elektrischen Maschine 1 die durch die Lagerung des Rotors 3 übertragenen und vom Stator 2 aufgenommenen mechanischen Kräfte zumindest teilweise über die Vergussmas- se 7 in den Stator 2 eingeleitet. Im gezeigten Beispiel werden in vorteilhafter Weise sogar sämtliche durch die Lagerung des Rotors 3, das heißt im gezeigten Beispiel durch das erste Lager 4 und das zweite Lager 5, übertragenen Kräfte über die Vergussmasse 7 in den Stator 2 eingeleitet. According to the invention, in the exemplary electric machine 1, the mechanical forces transmitted by the bearing of the rotor 3 and received by the stator 2 are at least partially transmitted via the casting compound. se 7 introduced into the stator 2. In the example shown, even all the forces transmitted by the bearing of the rotor 3, that is to say in the example shown by the first bearing 4 and the second bearing 5, are introduced into the stator 2 via the potting compound 7.
Die Einleitung der Kräfte erfolgt in vorteilhafter Weise über ein erstes Lagersitzelement 8, welches einen Lagersitz für das erste Lager 4 bereitstellt, und ein zweites Lagersitzelement 9, welches einen Lagersitz für das zweite Lager 5 bereitstellt. Die Lagersitzelemente 8 und 9 sind im gezeigten Bei- spiel in vorteilhafter Weise im Wesentlichen halbschalenförm ig gestaltet. Im Fall der beispielhaften elektrischen Maschine 1 sind die Lagersitzelemente 8 und 9 bevorzugt aus einem Metall, besonders bevorzugt aus Alum inium, gefertigt. Die beispielhafte elektrische Maschine 1 weist zudem ein Statorpaket 1 0 auf. Das Statorpaket 1 0 ist ebenfalls zumindest teilweise von der Vergussmasse 7 umgeben. Besonders vorteilhaft im Fall der beispielhaften elektrischen Maschine 1 ist es, dass auch die zum Rotor 3 weisenden Flächen 1 1 des Statorpakets 1 0 von der Vergussmasse 7 umgeben sind. Bei den Flä- chen 1 1 handelt es sich um die bezogen auf die Drehachse X äußersten Flächen des Statorpakets 1 0. The introduction of the forces takes place in an advantageous manner via a first bearing seat element 8, which provides a bearing seat for the first bearing 4, and a second bearing seat element 9, which provides a bearing seat for the second bearing 5. The bearing seat elements 8 and 9 are designed in the example shown in an advantageous manner substantially halbschalenförmig ig. In the case of the exemplary electric machine 1, the bearing seat elements 8 and 9 are preferably made of a metal, particularly preferably of aluminum. The exemplary electric machine 1 also has a stator 1 0 on. The stator 1 0 is also at least partially surrounded by the potting compound 7. It is particularly advantageous in the case of the exemplary electric machine 1 that the surfaces 1 1 of the stator packet 1 0 facing the rotor 3 are also surrounded by the potting compound 7. The surfaces 1 1 are the outermost surfaces of the stator packet 10 relative to the axis of rotation X.
Die Spulenwicklung 6 der beispielhaften elektrischen Maschine 1 weist einen ersten Wickelkopf 12 und einen zweiten Wickelkopf 1 3 auf. Der erste Wickelkopf 12 und der zweite Wickelkopf 1 3 sind von der Vergussmasse 7 umgeben. In vorteilhafter Weise sind der erste Wickelkopf 12 und der zweite Wickelkopf 1 3 teilweise in einem Bereich um die Drehachse X angeordnet, der sich in radialer Richtung Y von der Drehachse X weg von 0 bis 40 % des Abstands des von der Drehachse X entferntesten Punktes der Spu- lenwicklung 6 von der Drehachse X erstreckt. Auf diese Weise kann bei der beispielhaften elektrischen Maschine 1 ein Raumbereich nahe der Drehachse X zur Unterbringung der Wickelköpfe 12 und 1 3 genutzt werden, was zur besonders kompakten Bauweise der beispielhaften elektrischen Maschine 1 beiträgt. The coil winding 6 of the exemplary electric machine 1 has a first winding head 12 and a second winding head 1 3. The first winding head 12 and the second winding head 1 3 are surrounded by the potting compound 7. Advantageously, the first winding head 12 and the second winding head 1 3 are partially disposed in a region about the axis of rotation X, which in the radial direction Y from the axis of rotation X away from 0 to 40% of the distance of the farthest from the axis of rotation X point of Coil winding 6 extends from the axis of rotation X. In this way, in the exemplary electric machine 1, a space area near the rotation axis X can be used for accommodating the winding heads 12 and 13, resulting in particularly compact design of the exemplary electric machine 1 contributes.
In axialer Richtung bezogen auf die Drehachse X ist der erste Wickelkopf 12 vorteilhaft teilweise im Bereich des Lagersitzes des ersten Lagers 4 angeordnet. In ebenfalls vorteilhafter Weise ist der zweite Wickelkopf 1 3 in axialer Richtung bezogen auf die Drehachse X teilweise im Bereich des Lagersitzes des zweiten Lagers 5 angeordnet. Dies bringt im Fall der beispielhaften elektrischen Maschine 1 den Vorteil einer vergleichsweise kurzen Länge der elektrischen Maschine 1 in Richtung der Drehachse X m it sich. Vorteilhaft in diesem Zusammenhang wirkt sich die Tatsache aus, dass im Fall der beispielhaften elektrischen Maschine 1 das erste Lager 4 in einem größeren Abstand von der Drehachse X angeordnet ist als der erste Wickelkopf 12. In ebenfalls vorteilhafter Weise ist das zweite Lager 5 ebenfalls in einem größeren Abstand von der Drehachse X angeordnet, als der zweite Wickelkopf 1 3. In the axial direction with respect to the axis of rotation X, the first winding head 12 is advantageously arranged partially in the region of the bearing seat of the first bearing 4. In a likewise advantageous manner, the second winding head 1 3 is arranged in the axial direction with respect to the axis of rotation X partially in the region of the bearing seat of the second bearing 5. In the case of the exemplary electric machine 1, this has the advantage of a comparatively short length of the electric machine 1 in the direction of the axis of rotation X with it. Advantageous in this context is the fact that in the case of the exemplary electric machine 1, the first bearing 4 is arranged at a greater distance from the axis of rotation X than the first winding head 12. In a likewise advantageous manner, the second bearing 5 is also in one greater distance from the axis of rotation X arranged as the second winding head 1 third
Der Rotor 3 der beispielhaften elektrischen Maschine 1 weist in vorteilhafter Weise eine Mehrzahl Dauermagnete 14 auf. Die Dauermagnete 14 wirken mit dem von der Spulenwicklung 6 erzeugten magnetischen Feld zusammen und erzeugen so die Rotationsbewegung des Rotors 3 relativ zum Stator 2. In vorteilhafter Weise stehen die Stirnflächen 1 5 des Stators 2 in axialer Richtung bezogen auf die Drehachse X für eine mögliche Befestigung der elektrischen Maschine 1 an einer die elektrische Maschine 1 aufnehmenden Struktur zur Verfügung. Mit anderen Worten ausgedrückt kann der Stator 2 der beispielhaften elektrischen Maschine 1 quasi die Funktion der Achse einer herkömm lichen elektrischen Maschine selbst übernehmen, so dass sich insgesamt die gewünschte kompakte Bauweise ergibt. Bezugszeichenliste: The rotor 3 of the exemplary electric machine 1 advantageously has a plurality of permanent magnets 14. The permanent magnets 14 cooperate with the magnetic field generated by the coil winding 6 and thus generate the rotational movement of the rotor 3 relative to the stator 2. In an advantageous manner, the end faces 1 5 of the stator 2 in the axial direction relative to the axis of rotation X for a possible attachment the electric machine 1 at a the electric machine 1 receiving structure available. In other words, the stator 2 of the exemplary electric machine 1 quasi assume the function of the axis of a conven- union electric machine itself, so that the overall result is the desired compact design. LIST OF REFERENCE NUMBERS
1 elektrische Maschine 1 electric machine
2 Stator 2 stators
3 Rotor  3 rotor
4 erstes Lager  4 first camp
5 zweites Lager  5 second camp
6 Spulenwicklung  6 coil winding
7 Vergussmasse 7 potting compound
8 erstes Lagersitzelement  8 first bearing seat element
9 zweites Lagersitzelement  9 second bearing seat element
10 Statorpaket  10 stator pack
11 Flächen  11 areas
12 erster Wickelkopf 12 first winding head
13 zweiter Wickelkopf  13 second winding head
14 Dauermagnete  14 permanent magnets
15 Stirnfläche X Drehachse  15 face X axis of rotation
Y radiale Richtung  Y radial direction
* * * * * * ** * * * * * *

Claims

Patentansprüche claims
Elektrische Maschine (1 ), insbesondere Außenläufermotor, m it einem Stator (2) und einem den Stator (2) umgebenden Rotor (3), wobei der Rotor (3) relativ zum Stator (2) um eine Drehachse (X) drehbar gelagert ist, wobei die über die drehbare Lagerung des Rotors (3) übertragenen mechanischen Kräfte zumindest teilweise von dem Stator (2) aufgenommen werden, wobei der Stator (2) eine Spulenwicklung (6) zur Erzeugung eines magnetischen Feldes aufweist, wobei die Spulenwicklung (6) zum indest teilweise m it einer Vergussmasse (7) umgeben ist, dadurch gekennzeichnet, dass die durch die Lagerung des Rotors (3) übertragenen und von dem Stator (2) aufgenommenen mechanischen Kräfte zum indest teilweise über die Vergussmasse (7) in den Stator (2) eingeleitet werden. Electric machine (1), in particular external rotor motor, with a stator (2) and a rotor (3) surrounding the stator (2), wherein the rotor (3) is rotatably mounted relative to the stator (2) about a rotation axis (X) in which the mechanical forces transmitted via the rotatable mounting of the rotor (3) are at least partially absorbed by the stator (2), the stator (2) having a coil winding (6) for generating a magnetic field, the coil winding (6) partly surrounded by a potting compound (7), characterized in that the mechanical forces transmitted by the bearing of the rotor (3) and absorbed by the stator (2) partially penetrate into the stator via the potting compound (7) ( 2).
Elektrische Maschine (1 ) nach Anspruch 1 , dadurch gekennzeichnet, dass die durch die Lagerung des Rotors (3) übertragenen und von dem Stator (2) aufgenommenen mechanischen Kräfte vollständig über die Vergussmasse (7) in den Stator Electric machine (1) according to Claim 1, characterized in that the mechanical forces transmitted by the bearing of the rotor (3) and absorbed by the stator (2) are completely transmitted via the potting compound (7) into the stator
(2) eingeleitet werden. (2).
Elektrische Maschine (1 ) nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die elektrische Maschine (1 ) ein zwischen der Vergussmasse (7) und einem ersten Lager (4) zur drehbaren Lagerung des Rotors (3) angeordnetes erstes Lagersitzelement (8) zur Bereitstellung eines ersten Lagersitzes für das erste Lager (4) aufweist. Electric machine (1) according to claim 1 or 2, characterized in that the electric machine (1) between the potting compound (7) and a first bearing (4) for rotatably supporting the rotor (3) arranged first bearing seat member (8) Provision of a first bearing seat for the first bearing (4).
Elektrische Maschine (1 ) nach Anspruch 3, dadurch gekennzeichnet, dass die elektrische Maschine (1 ) ein zwischen der Vergussmasse (7) und einem zweiten Lager (5) zur drehbaren Lagerung des Rotors (3) angeordnetes zweites Lagersitzelement (9) zur Bereitstellung eines zweiten Lagersitzes für das zweite Lager aufweist. Elektrische Maschine (1 ) nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass das erste Lagersitzelement (8) und/oder das zweite Lagersitzelement (9) zum indest im Wesentlichen halbschalen- förm ig gestaltet ist/sind. Electrical machine (1) according to claim 3, characterized in that the electric machine (1) between the potting compound (7) and a second bearing (5) for rotatably supporting the rotor (3) arranged second bearing seat member (9) for providing a having second bearing seat for the second bearing. Electrical machine (1) according to one of the preceding claims, characterized in that the first bearing seat element (8) and / or the second bearing seat element (9) is designed to be substantially half-shell-shaped.
Elektrische Maschine (1 ) nach einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, dass das erste Lagersitzelement (8) und/oder das zweite Lagersitzelement (9) ein Metall, vorzugsweise eine Alum iniumlegierung, als Werkstoff aufweist. Electrical machine (1) according to one of claims 3 to 5, characterized in that the first bearing seat element (8) and / or the second bearing seat element (9) comprises a metal, preferably an aluminum alloy, as a material.
Elektrische Maschine (1 ) einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die elektrische Maschine (1 ) ein Statorpaket (1 0) aufweist, dass von der Vergussmasse (7) zumindest teilweise umgeben ist, insbesondere wobei die bezogen auf die Drehachse (X) äußersten zum Rotor Electrical machine (1) according to one of the preceding claims, characterized in that the electric machine (1) has a stator core (1 0) that is at least partially surrounded by the casting compound (7), in particular with respect to the axis of rotation (X) outermost to the rotor
(3) weisenden Flächen (1 1 ) des Statorpakets (2) von der Vergussmasse (7) umgeben sind. (3) facing surfaces (1 1) of the stator (2) are surrounded by the potting compound (7).
Elektrische Maschine (1 ) nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Spulenwicklung (6) einen ersten Wickelkopf (12) und/oder einen zweiten Wickelkopf (1 3) aufweist, der zum indest teilweise in einem Bereich um die Drehachse (X) angeordnet ist, der sich in radialer Richtung (Y) von der Drehachse weg über 40%, insbesondere über 20%, des Abstands des von der Drehachse (X) entferntesten Punktes der Spulenwicklung (6) von der Drehachse (X) erstreckt. Electric machine (1) according to one of the preceding claims, characterized in that the coil winding (6) has a first winding head (12) and / or a second winding head (1 3), the partially partially in a region around the axis of rotation (X ), which extends in the radial direction (Y) away from the axis of rotation over 40%, in particular over 20%, of the distance of the axis of rotation (X) farthest point of the coil winding (6) from the axis of rotation (X).
Elektrische Maschine (1 ) nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass die Spulenwicklung (6) einen ersten Wickelkopf (12) und/oder einen zweiten Wickelkopf (1 3) aufweist, der in axialer Richtung bezogen auf die Drehachse zum indest teilweise im Bereich des ersten und/oder zweiten Lagersitzes angeordnet ist. Elektrische Maschine (1 ) nach einem der vorigen Ansprüche, dadurch gekennzeichnet, dass das erste Lager Electric machine (1) according to one of the preceding claims, characterized in that the coil winding (6) has a first winding head (12) and / or a second winding head (1 3), which in the axial direction relative to the axis of rotation to partially in the Area of the first and / or second bearing seat is arranged. Electrical machine (1) according to one of the preceding claims, characterized in that the first bearing
(4) und/oder das zweite Lager(4) and / or the second bearing
(5) zum indest teilweise in einem größeren Abstand von der Drehachse(5) partly partially at a greater distance from the axis of rotation
(6) angeordnet ist als der erste Wickelkopf (12) und/oder den zweite Wickelkopf (1 3). (6) is arranged as the first winding head (12) and / or the second winding head (1 3).
EP18721946.4A 2017-04-21 2018-04-18 External rotor motor with cast stator Pending EP3613128A1 (en)

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CN110537313A (en) 2019-12-03
US20210152045A1 (en) 2021-05-20
US11626769B2 (en) 2023-04-11
CN110537313B (en) 2022-12-06
DE102017003865A1 (en) 2018-10-25

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