WO2003038972A1 - Electric machine energized with permanent magnets - Google Patents
Electric machine energized with permanent magnets Download PDFInfo
- Publication number
- WO2003038972A1 WO2003038972A1 PCT/DE2002/002211 DE0202211W WO03038972A1 WO 2003038972 A1 WO2003038972 A1 WO 2003038972A1 DE 0202211 W DE0202211 W DE 0202211W WO 03038972 A1 WO03038972 A1 WO 03038972A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- permanent magnets
- sleeve
- machine according
- pole housing
- cover
- 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.)
- Ceased
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
- H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
- H02K5/128—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas using air-gap sleeves or air-gap discs
-
- 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
- H02K1/17—Stator cores with permanent magnets
Definitions
- the invention is based on a permanent magnet-excited electrical machine, in particular a DC motor for vehicles, according to the preamble of claim 1.
- the stator poles are formed by rectangular permanent magnets and pole shoes placed on them.
- the permanent magnets rest on flat support surfaces formed on the pole housing, and the shell-shaped pole shoes, with their free surface facing away from the permanent magnet, together with the rotor enclosed by the stator, limit the working air gap of the direct current motor.
- the permanent magnets are on the pole housing and the pole pieces on the permanent magnets by gluing, overmolding and. attached.
- Direct current motors are also known in which the stator poles are formed by shell-shaped permanent magnet segments which are glued to the inner surface of the annular pole housing and which directly limit the working air gap with their free surface. For reasons of flow optimization in the working air gap, the radial thickness of the permanent magnet segments is reduced in the region of the segment edges.
- the electrical machine according to the invention with the features of claim 1 has the advantage that, by means of the thin-walled cover in the interior of the stator, an annular space is formed which is sealed off from the remaining stator interior of the machine and in which the permanent magnets lie.
- the closed annular space prevents material fragments or pieces detaching from the permanent magnets from penetrating into the working air gap between the stator and rotor as a result of breakage or material stresses and leading to jamming or blocking of the rotor of the electrical machine.
- This is of particular importance for DC motors that are used for steering power support in steering gears of vehicles; because if the rotor jammed or stuck, the vehicle would be unmanageable.
- the overload clutches currently used to prevent such a situation can be saved.
- the thin-walled cover has a sleeve which engages non-positively on the free surfaces of the permanent magnets and two cover rings which rest with their outer contour on the inner surface of the pole housing and overlap the end edges of the sleeve.
- Each cover ring carries on its end facing the sleeve an axially projecting collar onto which a sleeve end is pushed.
- the cover that covers the permanent magnets both axially and radially is constructed in a structurally simple manner.
- the sleeve is preferably made from tape material, the size of the selected tape length determining the sleeve diameter.
- the outer diameter of the sleeve is larger than the clear distance between diametrically opposed permanent magnets.
- the clear distance between the diametrical permanent magnets is measured in the magnet center.
- Fig. 2 is a perspective view of a cover of the permanent magnets in
- the armature or rotor 12 comprises an armature or rotor body 14 which is non-rotatably seated on a rotor shaft 13 and an armature or rotor winding 15 which lies in axial slots of the rotor body 13.
- the rotor winding 15 is connected to a commutator 16 which is also non-rotatably seated on the rotor shaft 13.
- the current supply to the rotor winding 15 takes place via a brush system 17, the commutator brushes 18 of which grind on the fins of the commutator 16.
- the stator 11 has an annular pole housing 20 and an even number of stator poles 19 which are arranged offset by the same circumferential angle on the pole housing 20.
- Each stator pole 19 consists of a shell-shaped permanent magnet 21, which is fastened to the inner surface 201 of the pole housing 20, preferably by gluing, and the approximately curved, free surface of which is attached to the Rotor body 14 delimits a working air gap 22.
- the individual permanent magnets 21 extend almost over a full pole pitch, which in a four-pole version of the stator 11 is 90 °, so that only a relatively small gap distance remains between adjacent permanent magnets 21. However, they can also be designed with a smaller width in the circumferential direction.
- the edge areas of the shell-shaped permanent magnets 21 are flattened, so that the radial thickness of the permanent magnets 21 is reduced at the magnetic edges.
- the annular pole housing 20 is covered with a bearing plate 23, 24 at each end face. Each end shield 23, 24 receives a rotary bearing 25 or 26 for the rotor shaft 13.
- the bearing plate 23 on the left in FIG. 1 also forms a platform for determining the
- the ring-shaped pole housing 20 is fastened to this end shield 23, and the second end shield 24 is in turn fastened to the pole housing 20.
- Excluding the working air gap 22 is one of the Permanent magnets 21 common, thin-walled cover 27 is provided, which covers the permanent magnets 21 in the axial and radial directions and, together with the inner surface 201 of the pole house 20, forms a closed space in which all material fragments or pieces are caught.
- the working air gap 22 is thus hermetically sealed off from the permanent magnets 21, so that no material fragments or pieces of material detaching from the permanent magnets 21 can reach the working air gap 22.
- the thin-walled cover 27 can be seen in FIG. 2 in perspective and in FIG. 1 in section in its installed position in the stator 11 of the direct current motor. It has a sleeve 28, which engages non-positively on the free surfaces of the permanent magnets 21, and two cover rings 29, 30, which lie with their outer contour on the inner surface 201 of the pole house 20 and overlap the end edges of the sleeve 28.
- the sleeve 28 is made of non-magnetic material and is preferably rolled from a strip of material. But it can also be designed as a closed ring.
- the outer diameter of the sleeve 28 is preferably chosen to be somewhat larger than the clear distance between diametrically opposed permanent magnets 21. In the case of permanent magnets 21 which flatten toward the magnetic edge, the clear distance of the diametrical permanent magnets is measured in the magnet center.
- the sleeve 28 bears against the free surfaces of the permanent magnets 21 under prestress and conforms overall to the magnet contour.
- Cover ring 29, 30 carries on its sleeve 28 facing End faces an axially projecting collar 291 and 301, on each of which a sleeve end is pushed.
- each cover ring 29, 30 can also have an annular groove 292 or 302, which is incorporated into the end face of the cover ring 29, 30 facing the sleeve 28, directly adjacent to the collar 291 or 301.
- the sleeve 28 is then immersed in these annular grooves 292 and 302, each with one end.
- the cover rings 29, 30, which are fixedly connected to the sleeve 28, are supported on the inner surface 201 of the pole housing 20, the cover ring 30 with its side facing away from the collar 301
- the invention is not limited to the exemplary embodiment described. At least the separate cover ring 30 can thus be dispensed with, in that the cover ring 30 is made in one piece with the end shield 24, that is to say the collar 301 and possibly the annular groove 302 are formed on the end shield 24, and the sleeve 38 is guided up to the end shield 24 to turn the covenant there
- the cover ring 30 can be formed as an annular web on the bottom of the pole housing.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
Description
Permanentmagneterregte elektrische MaschinePermanent magnet excited electrical machine
Stand der TechnikState of the art
Die Erfindung geht aus von einer permanentmagneterregten elektrischen Maschine, insbesondere einem Gleichstrommotor für Fahrzeuge, nach dem Oberbegriff des Anspruchs 1.The invention is based on a permanent magnet-excited electrical machine, in particular a DC motor for vehicles, according to the preamble of claim 1.
Bei einem bekannten Gleichstrommotor dieser Art (DE 1 160 080) werden die Statorpole von rechteckförmigen Permanentmagneten und auf diese aufgesetzten Polschuhen gebildet. Die Permanentmagnete liegen auf an dem Polgehäuse ausgebildeten, ebenen Auflageflächen auf, und die schalenförmig ausgebildeten Polschuhe begrenzen mit ihrer von dem Permanentmagneten abgekehrten freien Oberfläche zusammen mit dem vom Stator umschlossenen Rotor den Arbeitsluftspalt des Gleichstrommotors. Die Permanentmagnete sind am Polgehäuse und die Polschuhe an den Permanentmagneten durch Verklebung, Umspritzung u. ä. befestigt. Es sind auch bereits Gleichstrommotoren bekannt, bei denen die Statorpole von schalenförmigen Permanentmagnetsegmenten gebildet werden, die auf der Innenfläche des ringförmigen Polgehäuses aufgeklebt sind und mit ihrer freien Oberfläche unmittelbar den Arbeitsluftspalt begrenzen. Aus Gründen der Flußoptimierung im Arbeitsluftspalt ist die radiale Dicke der Permanentmagnetsegmente im Bereich der Segmentränder reduziert .In a known DC motor of this type (DE 1 160 080), the stator poles are formed by rectangular permanent magnets and pole shoes placed on them. The permanent magnets rest on flat support surfaces formed on the pole housing, and the shell-shaped pole shoes, with their free surface facing away from the permanent magnet, together with the rotor enclosed by the stator, limit the working air gap of the direct current motor. The permanent magnets are on the pole housing and the pole pieces on the permanent magnets by gluing, overmolding and. attached. Direct current motors are also known in which the stator poles are formed by shell-shaped permanent magnet segments which are glued to the inner surface of the annular pole housing and which directly limit the working air gap with their free surface. For reasons of flow optimization in the working air gap, the radial thickness of the permanent magnet segments is reduced in the region of the segment edges.
Vorteile der ErfindungAdvantages of the invention
Die erfindungsgemäße elektrische Maschine mit den Merkmalen des Anspruchs 1 hat den Vorteil, daß mittels der dünnwandigen Abdeckung im Statorinnern ein gegenüber dem verbleibenden Statorinnenraum der Maschine abgeschlossener Ringraum gebildet wird, in dem die Permanentmagnete einliegen. Der abgeschlossene Ringraum verhindert, daß infolge Bruch oder Materialspannungen sich von den Permanentmagneten ablösende Materialsplitter oder -stücke in den zwischen Stator und Rotor vorhandenen Arbeitsluftspalt eindringen und zu einem Klemmen oder Blockieren des Rotors der elektrischen Maschine führen. Dies ist von besonderer Bedeutung bei Gleichstrommotoren, die zur Lenkkraftunterstützung in Lenkgetrieben von Fahrzeugen eingesetzt werden; denn bei einem Klemmen oder Festsitzen des Rotors wäre das Fahrzeug unlenkbar. Die derzeit eingesetzten Überlastkupplungen zum Verhindern einer solchen Situation können eingespart werden.The electrical machine according to the invention with the features of claim 1 has the advantage that, by means of the thin-walled cover in the interior of the stator, an annular space is formed which is sealed off from the remaining stator interior of the machine and in which the permanent magnets lie. The closed annular space prevents material fragments or pieces detaching from the permanent magnets from penetrating into the working air gap between the stator and rotor as a result of breakage or material stresses and leading to jamming or blocking of the rotor of the electrical machine. This is of particular importance for DC motors that are used for steering power support in steering gears of vehicles; because if the rotor jammed or stuck, the vehicle would be unmanageable. The overload clutches currently used to prevent such a situation can be saved.
Durch die in den weiteren Ansprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen oder Verbesserungen der im Anspruch 1 angegebenen elektrischen Maschine möglich. Gemäß einer bevorzugten Ausführungsform der Erfindung weist die dünnwandige Abdeckung eine sich kraftschlüssig an die freien Oberflächen der Permanentmagnete anlegende Hülse und zwei Abdeckringe auf, die mit ihrer Außenkontur an der Innenfläche des Polgehäuses anliegen und die Stirnränder der Hülse übergreifen. Jeder Abdeckring trägt dabei auf seiner der Hülse zugekehrten Stirnseite einen axial vorstehenden Bund, auf den ein Hülsenende aufgeschoben ist. Auf diese Meise wird konstruktiv einfach die die Permanentmagnete sowohl axial als auch radial überdeckende Abdeckung realisiert. Die Hülse wird vorzugsweise aus Bandmaterial gefertigt, wobei die Größe der gewählten Bandlänge den Hülsendurchmesser bestimmt.Advantageous further developments or improvements of the electrical machine specified in claim 1 are possible through the measures listed in the further claims. In accordance with a preferred embodiment of the invention, the thin-walled cover has a sleeve which engages non-positively on the free surfaces of the permanent magnets and two cover rings which rest with their outer contour on the inner surface of the pole housing and overlap the end edges of the sleeve. Each cover ring carries on its end facing the sleeve an axially projecting collar onto which a sleeve end is pushed. In this tit, the cover that covers the permanent magnets both axially and radially is constructed in a structurally simple manner. The sleeve is preferably made from tape material, the size of the selected tape length determining the sleeve diameter.
Gemäß einer vorteilhaften Ausführungsform der Erfindung ist der Außendurchmesser der Hülse größer bemessen als der lichte Abstand einander diametral gegenüberliegender Permanentmagnete. Bei schalenförmig ausgebildeten Permanentmagneten, deren radiale Dicke im Bereich der Magnetränder durch Abflachung reduziert ist, wird der lichte Abstand zwischen den diametralen Permanentmagneten in Magnetmitte gemessen. Der vergrößerte Hülsendurchmesser hat den Vorteil, daß sich die Hülse unter Vorspannung an die Magnetkonturen anlegt und somit ein Schleifen der Hülse am sich drehenden Rotor sicher verhindert wird.According to an advantageous embodiment of the invention, the outer diameter of the sleeve is larger than the clear distance between diametrically opposed permanent magnets. In the case of shell-shaped permanent magnets, the radial thickness of which is reduced by flattening in the area of the magnetic edges, the clear distance between the diametrical permanent magnets is measured in the magnet center. The enlarged sleeve diameter has the advantage that the sleeve bears against the magnetic contours under pretension, thus reliably preventing the sleeve from grinding on the rotating rotor.
Zeichnungdrawing
Die Erfindung ist anhand eines in der Zeichnung dargestellten Ausführungsbeispiels in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Fig. 1 einen Längsschnitt eines Gleichstrommotors für ein Fahrzeug,The invention is explained in more detail in the following description with reference to an embodiment shown in the drawing. Show it: 1 shows a longitudinal section of a DC motor for a vehicle,
Fig. 2 eine perspektivische Darstellung einer Abdeckung der Permanentmagnete imFig. 2 is a perspective view of a cover of the permanent magnets in
Gleichstrommotor gemäß Fig. 1.DC motor according to FIG. 1.
Beschreibung des AusführungsbeispielsDescription of the embodiment
Der in Fig. 1 im Längsschnitt dargestellt Gleichstrommotor als Ausführungsbeispiel für eine allgemeine, permanentmagneterregte elektrische Maschine, der z. B. als Servomotor für die Lenkunterstützung im Lenkgetriebe oder als sonstiger Stellmotor eingesetzt wird, weist einen Stator 11 und einen vom Stator 11 ringförmig umschlossenen Rotor 12 auf. Der Anker oder Rotor 12 umfaßt einen drehfest auf einer Rotorwelle 13 sitzenden Anker- oder Rotorkörper 14 und eine in Axialnuten des Rotorkörpers 13 einliegende Anker- oder Rotorwicklung 15. Die Rotorwicklung 15 ist an einem ebenfalls drehfest auf der Rotorwelle 13 sitzenden Kommutator 16 angeschlossen. Die Stromzuführung zu der Rotorwicklung 15 erfolgt über ein Bürstensystem 17, dessen Kommutatorbürsten 18 auf den Lamellen des Kommutators 16 schleifen.The DC motor shown in Fig. 1 in longitudinal section as an embodiment for a general, permanent magnet excited electrical machine, the z. B. is used as a servo motor for steering assistance in the steering gear or as another servomotor, has a stator 11 and a rotor 12 surrounded by the stator 11 in a ring. The armature or rotor 12 comprises an armature or rotor body 14 which is non-rotatably seated on a rotor shaft 13 and an armature or rotor winding 15 which lies in axial slots of the rotor body 13. The rotor winding 15 is connected to a commutator 16 which is also non-rotatably seated on the rotor shaft 13. The current supply to the rotor winding 15 takes place via a brush system 17, the commutator brushes 18 of which grind on the fins of the commutator 16.
Der Stator 11 weist ein ringförmiges Polgehäuse 20 und eine geradzahlige Anzahl von Statorpolen 19 auf, die um gleiche Umfangswinkel am Polgehäuse 20 versetzt angeordnet sind. Jeder Statorpol 19 besteht aus einem schalenförmigen Permanentmagneten 21, der an der Innenfläche 201 des Polgehäuses 20 vorzugsweise durch Verkleben befestigt ist und dessen etwa bogenförmig gekrümmte, freie Oberfläche mit dem Rotorkörper 14 eine Arbeitsluftspalt 22 begrenzt. Die einzelnen Permanentmagnete 21 erstrecken sich im Ausführungsbeispiel nahezu über eine volle Polteilung, die bei einer vierpoligen Ausführung des Stators 11 90° beträgt, so daß zwischen benachbarten Permanentmagneten 21 nur ein relativ kleiner Spaltabstand verbleibt. Sie können aber auch mit kleinerer Breite in Umfangsrichtung ausgeführt werden. Zur Verringerung der Rastmomente sind die Randbereiche der schalenförmigen Permanentmagnete 21 abgeflacht, so daß an den Magneträndern die radiale Dicke der Permanentmagnete 21 reduziert ist. Das ringförmige Polgehäuse 20 ist an jedem Stirnende mit einem Lagerschild 23, 24 abgedeckt. Jedes Lagerschild 23, 24 nimmt ein Drehlager 25 bzw. 26 für die Rotorwelle 13 auf. Der in Fig. 1 linke Lagerschild 23 bildet zugleich eine Plattform für die Festlegung desThe stator 11 has an annular pole housing 20 and an even number of stator poles 19 which are arranged offset by the same circumferential angle on the pole housing 20. Each stator pole 19 consists of a shell-shaped permanent magnet 21, which is fastened to the inner surface 201 of the pole housing 20, preferably by gluing, and the approximately curved, free surface of which is attached to the Rotor body 14 delimits a working air gap 22. In the exemplary embodiment, the individual permanent magnets 21 extend almost over a full pole pitch, which in a four-pole version of the stator 11 is 90 °, so that only a relatively small gap distance remains between adjacent permanent magnets 21. However, they can also be designed with a smaller width in the circumferential direction. To reduce the cogging torque, the edge areas of the shell-shaped permanent magnets 21 are flattened, so that the radial thickness of the permanent magnets 21 is reduced at the magnetic edges. The annular pole housing 20 is covered with a bearing plate 23, 24 at each end face. Each end shield 23, 24 receives a rotary bearing 25 or 26 for the rotor shaft 13. The bearing plate 23 on the left in FIG. 1 also forms a platform for determining the
Gleichstrommotors im Fahrzeug. An diesem Lagerschild 23 ist das ringförmige Polgehäuse 20 befestigt, und an dem Polgehäuse 20 ist wiederum der zweite Lagerschild 24 befestigt .DC motor in the vehicle. The ring-shaped pole housing 20 is fastened to this end shield 23, and the second end shield 24 is in turn fastened to the pole housing 20.
Aus unterschiedlichen Gründen, z.B. in rauher Betriebsumgebung des Fahrzeugs, kann nicht zuverlässig ausgeschlossen werden, daß infolge von Materialspannung sich in den Permanentmagneten 21 Risse und Sprüngen bilden, als deren Folge sich kleine Materialsplitter oder -stücke von den Permanentmagneten ablösen. Gelangen diese Materialsplitter in den Arbeitsluftspalt 22 so kann es zu einem Verklemmen oder Blockieren des Rotors 12 kommen, was gerade beim Einsatz des Gleichstrommotors zur Lenkkraftunterstützung kritisch ist. Um das Eindringen von solchen Materialsplittern in denFor different reasons, e.g. in a harsh operating environment of the vehicle, it cannot be reliably excluded that cracks and cracks form in the permanent magnets as a result of material tension, as a result of which small pieces of material or pieces detach from the permanent magnets. If these material splinters get into the working air gap 22, the rotor 12 may become jammed or blocked, which is particularly critical when using the direct current motor to assist the steering force. To prevent the penetration of such fragments of material into the
Arbeitsluftspalt 22 zuverlässig auszuschließen, ist eine den Permanentmagneten 21 gemeinsame, dünnwandige Abdeckung 27 vorgesehen, die die Permanentmagneten 21 in axialer und radialer Richtung abdeckt und zusammen mit der Innenflache 201 des Polgehauses 20 einen geschlossenen Raum bildet, m dem alle Matenalsplitter oder -stucke aufgefangen werden. Der Arbeitsluftspalt 22 ist damit gegenüber den Permanentmagneten 21 hermetisch abgeschottet, so daß keine von den Permanentmagneten 21 sich ablosende Matenalsplitter oder -stucke m den Arbeitsluftspalt 22 gelangen können.Excluding the working air gap 22 is one of the Permanent magnets 21 common, thin-walled cover 27 is provided, which covers the permanent magnets 21 in the axial and radial directions and, together with the inner surface 201 of the pole house 20, forms a closed space in which all material fragments or pieces are caught. The working air gap 22 is thus hermetically sealed off from the permanent magnets 21, so that no material fragments or pieces of material detaching from the permanent magnets 21 can reach the working air gap 22.
Die dünnwandige Abdeckung 27 ist in Fig. 2 perspektivisch und m Fig. 1 im Schnitt in ihrer Einbaulage im Stator 11 des Gleichstrommotors zu sehen. Sie weist eine Hülse 28, die sich kraftschlussig an die freien Oberflachen der Permanentmagnete 21 anlegt, und zwei Abdeckringe 29, 30 auf, die mit ihrer Außenkontur an der Innenflache 201 des Polgehauses 20 anliegen und die Stirnrander der Hülse 28 übergreifen. Die Hülse 28 besteht aus amagnetischem Werkstoff und ist vorzugsweise aus einem Materialband gerollt. Sie kann aber auch als geschlossener Ring ausgeführt werden. Durch dieThe thin-walled cover 27 can be seen in FIG. 2 in perspective and in FIG. 1 in section in its installed position in the stator 11 of the direct current motor. It has a sleeve 28, which engages non-positively on the free surfaces of the permanent magnets 21, and two cover rings 29, 30, which lie with their outer contour on the inner surface 201 of the pole house 20 and overlap the end edges of the sleeve 28. The sleeve 28 is made of non-magnetic material and is preferably rolled from a strip of material. But it can also be designed as a closed ring. Through the
Bandlange des Matenalbandes wird der Durchmesser der Hülse 28 festgelegt. Vorzugsweise wird der Außendurchmesser der Hülse 28 etwas großer gewählt als der lichte Abstand einander diametral gegenüberliegender Permanentmagnete 21. Bei sich zum Magnetrand hin abflachenden Permanentmagneten 21 wird der lichte Abstand der diametralen Permanentmagnete in Magnetmitte gemessen. Durch diese größereBand length of the Matenalbandes the diameter of the sleeve 28 is determined. The outer diameter of the sleeve 28 is preferably chosen to be somewhat larger than the clear distance between diametrically opposed permanent magnets 21. In the case of permanent magnets 21 which flatten toward the magnetic edge, the clear distance of the diametrical permanent magnets is measured in the magnet center. Through this bigger one
Durchmesserbemessung legt sich die Hülse 28 unter Vorspannung an die freien Oberflachen der Permanentmagnete 21 an und schmiegt sich insgesamt an die Magnetkontur an. JederDiameter measurement, the sleeve 28 bears against the free surfaces of the permanent magnets 21 under prestress and conforms overall to the magnet contour. Everyone
Abdeckring 29, 30 tragt auf seiner der Hülse 28 zugekehrten Stirnseiten einen axial vorstehenden Bund 291 bzw. 301, auf den jeweils ein Hülsenende aufgeschoben ist. Zusätzlich kann jeder Abdeckring 29, 30 noch eine Ringnut 292 bzw. 302 aufweisen, die in die der Hülse 28 zugekehrte Stirnfläche des -Abdeckrings 29, 30 unmittelbar an den Bund 291 bzw. 301 angrenzend eingearbeitet ist. In diese Ringnuten 292 und 302 taucht dann die Hülse 28 mit jeweils einem Stirnende ein. Die fest mit der Hülse 28 verbundenen Abdeckringe 29, 30 stützen sich an der Innenfläche 201 des Polgehäuses 20 ab, wobei der Abdeckring 30 mit seiner vom Bund 301 abgekehrtenCover ring 29, 30 carries on its sleeve 28 facing End faces an axially projecting collar 291 and 301, on each of which a sleeve end is pushed. In addition, each cover ring 29, 30 can also have an annular groove 292 or 302, which is incorporated into the end face of the cover ring 29, 30 facing the sleeve 28, directly adjacent to the collar 291 or 301. The sleeve 28 is then immersed in these annular grooves 292 and 302, each with one end. The cover rings 29, 30, which are fixedly connected to the sleeve 28, are supported on the inner surface 201 of the pole housing 20, the cover ring 30 with its side facing away from the collar 301
Stirnflächen an dem Lagerschild 24 anliegt, und dort zusätzlich befestigt sein kann.End faces on the bearing plate 24, and can also be attached there.
Die Erfindung ist nicht auf das beschriebene Ausführungsbeispiel beschränlct. So kann zumindest auf den separaten Abdeckring 30 verzichtet werden, indem der Abdeckring 30 einstückig mit dem Lagerschild 24 ausgeführt wird, also der Bund 301 und ggf. die Ringnut 302 am Lagerschild 24 ausgebildet werden, und die Hülse 38 bis an das Lagerschild 24 geführt wird, um dort wiederum den BundThe invention is not limited to the exemplary embodiment described. At least the separate cover ring 30 can thus be dispensed with, in that the cover ring 30 is made in one piece with the end shield 24, that is to say the collar 301 and possibly the annular groove 302 are formed on the end shield 24, and the sleeve 38 is guided up to the end shield 24 to turn the covenant there
301 zu übergreifen und mit ihrem Stirnrand in die Ringnut 302 einzutauchen. Ist das Lagerschild 24 einstückiger Teil des dann topfförmigen Polgehäuses 20 so kann der Abdeckring 30 als Ringsteg an dem Boden des Polgehäuses angeformt sein. 301 overlap and dip into the annular groove 302 with its front edge. If the end shield 24 is a one-piece part of the then pot-shaped pole housing 20, the cover ring 30 can be formed as an annular web on the bottom of the pole housing.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10152502.8 | 2001-10-24 | ||
| DE2001152502 DE10152502A1 (en) | 2001-10-24 | 2001-10-24 | Permanent magnet excited electrical machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2003038972A1 true WO2003038972A1 (en) | 2003-05-08 |
Family
ID=7703581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/DE2002/002211 Ceased WO2003038972A1 (en) | 2001-10-24 | 2002-06-18 | Electric machine energized with permanent magnets |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE10152502A1 (en) |
| WO (1) | WO2003038972A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005039884A1 (en) * | 2005-08-23 | 2007-03-08 | BSH Bosch und Siemens Hausgeräte GmbH | Rotor cover and electric motor |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10302454A1 (en) | 2003-01-23 | 2004-07-29 | Robert Bosch Gmbh | Direct current motor used in e.g. vehicle steering system, includes protection against magnetic particles, formed by overlapping cut-out with centering rings |
| US20090021099A1 (en) * | 2005-04-11 | 2009-01-22 | Pulsed Inertial Electric Motor | Pulsed Inertial Electric Motor |
| DE102010033700B4 (en) | 2010-07-30 | 2022-11-10 | Stöber Antriebstechnik GmbH & Co. KG | electric motor |
| DE102014007671B4 (en) * | 2014-05-27 | 2025-10-09 | Sew-Eurodrive Gmbh & Co Kg | Electric motor with a stator housing |
| JP7627272B2 (en) * | 2020-08-11 | 2025-02-05 | タカノ株式会社 | Rotational Drive Unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738175B1 (en) * | 1977-08-24 | 1978-07-27 | Siemens Ag | Permanent magnet excited electrical machine |
| US4665333A (en) * | 1985-03-26 | 1987-05-12 | Fag Kugelfischer Georg Schafer (Kgaa) | Separator for securing magnets |
| US4873461A (en) * | 1988-05-13 | 1989-10-10 | Stryker Corporation | Electric motor sterilizable surgical power tool |
| US5723929A (en) * | 1995-09-19 | 1998-03-03 | Nippondenso Co., Ltd. | D.C. Motor with primary and auxiliary magnetic poles |
-
2001
- 2001-10-24 DE DE2001152502 patent/DE10152502A1/en not_active Ceased
-
2002
- 2002-06-18 WO PCT/DE2002/002211 patent/WO2003038972A1/en not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738175B1 (en) * | 1977-08-24 | 1978-07-27 | Siemens Ag | Permanent magnet excited electrical machine |
| US4665333A (en) * | 1985-03-26 | 1987-05-12 | Fag Kugelfischer Georg Schafer (Kgaa) | Separator for securing magnets |
| US4873461A (en) * | 1988-05-13 | 1989-10-10 | Stryker Corporation | Electric motor sterilizable surgical power tool |
| US5723929A (en) * | 1995-09-19 | 1998-03-03 | Nippondenso Co., Ltd. | D.C. Motor with primary and auxiliary magnetic poles |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102005039884A1 (en) * | 2005-08-23 | 2007-03-08 | BSH Bosch und Siemens Hausgeräte GmbH | Rotor cover and electric motor |
| US8110958B2 (en) | 2005-08-23 | 2012-02-07 | Bsh Bosch Und Siemens Hausgeraete Gmbh | Rotor cover with rotor fins extending between stator slots |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10152502A1 (en) | 2003-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2319162B1 (en) | Electrical machine | |
| DE3300494A1 (en) | THREE-PHASE GENERATOR FOR VEHICLES, ESPECIALLY WITH A CLAW-POLE RUNNER | |
| WO2015044034A2 (en) | Electric machine and connecting unit for an electric machine | |
| DE102018202943A1 (en) | electric motor | |
| WO2015082220A2 (en) | Stator for an electronically commutated direct current motor | |
| EP4205268A1 (en) | Electric machine arrangement | |
| EP0482226A1 (en) | Motor and/or generator operating according to the reluctance principle | |
| DE3410760A1 (en) | ELECTRIC GENERATOR, ESPECIALLY FOR VEHICLES | |
| DE19523789A1 (en) | Brushless motor for preventing sludge scattering - has sensor magnet which detects change in magnetic pole associated with rotation of rotating shafts | |
| WO2003038972A1 (en) | Electric machine energized with permanent magnets | |
| EP2628237B1 (en) | Permanent magnet rotor for an electric motor | |
| WO2012150114A2 (en) | Electric motor | |
| EP1420502B1 (en) | Electric motor | |
| DE102019118646A1 (en) | Injection molded magnetic holder for a brushless electric motor | |
| DE3103475A1 (en) | ELECTRICAL MACHINE, ESPECIALLY SMALL MOTOR | |
| DE202008017587U1 (en) | rotor | |
| EP2171829A1 (en) | Electric machine | |
| DE19958503A1 (en) | Electrical machine | |
| DE112005000419B4 (en) | Multi-phase rotary electric machine for motor vehicles | |
| DE102014225379A1 (en) | Electric machine, in particular starter motor | |
| DE102006014498A1 (en) | Stator for an electric machine | |
| DE112021001075T5 (en) | ROTOR | |
| EP3457529B1 (en) | Disc motor | |
| DE1272432B (en) | DC motor | |
| EP1233497B1 (en) | Permanent-magnet excited DC machine, such as DC motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Kind code of ref document: A1 Designated state(s): JP US |
|
| AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
| 122 | Ep: pct application non-entry in european phase | ||
| NENP | Non-entry into the national phase |
Ref country code: JP |
|
| WWW | Wipo information: withdrawn in national office |
Country of ref document: JP |