WO1999021268A1 - Electric machine - Google Patents
Electric machine Download PDFInfo
- Publication number
- WO1999021268A1 WO1999021268A1 PCT/EP1998/006444 EP9806444W WO9921268A1 WO 1999021268 A1 WO1999021268 A1 WO 1999021268A1 EP 9806444 W EP9806444 W EP 9806444W WO 9921268 A1 WO9921268 A1 WO 9921268A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rotor
- copper
- stator
- grooves
- die
- Prior art date
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 229910052802 copper Inorganic materials 0.000 claims abstract description 16
- 239000010949 copper Substances 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 5
- 238000004512 die casting Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/20—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having deep-bar rotors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Definitions
- the invention relates to an electrical machine, in particular for driving a vehicle according to the preamble of claim 1.
- Asynchronous machines are likewise known in which the rotor is arranged outside the stator.
- the rotor is designed as a short-circuit rotor and is made of electrically conductive aluminum, which is shaped into the rotor in the form of a die-cast ".
- the aluminum is cast during manufacture into the grooves formed by the laminated core of the rotor and the aluminum strands are made from the end faces of the rotor The respective grooves are combined into a ring and thus short-circuited (short-circuit cage). If necessary, fan blades are cast on directly.
- Aluminum is inexpensive, light and has a high electrical conductivity.
- the invention has for its object to reduce the rotor heat in an electrical asynchronous machine and to provide a speed-resistant arrangement.
- An electrical asynchronous machine with a stator and a rotor made of die-cast copper is to be used in particular for driving a single wheel of an electrically driven vehicle.
- Die-casting has high strength and tension of the copper material within the rotor core so that there is no danger to the copper cage due to rotational forces. In contrast to individual copper profile bars, which have to be connected individually on the end faces of the rotor, this problem does not occur with one-piece cast rotors made of copper.
- Fig. 1 shows a rotor in plan view
- Fig. 2 shows a section through a rotor.
- FIG. 1 shows an internal rotor 2 of an electrical machine (not shown here).
- the laminated core 4 of the rotor 2 a large number of individual laminations 6 are arranged next to one another.
- the individual sheets 6 have cutouts 8 on their circumference. These recesses 8 of the individual sheets 6 are arranged in the laminated core 4 so that there are continuous grooves 10 for the entire bundle 4.
- copper is poured into the grooves 10 when the laminated core is compressed, so that the grooves 10 fill with them.
- FIG. 2 shows a section through the rotor 2 according to FIG. 1.
- a sheet 6 is shown which has a number of cutouts 8 on its circumference. Copper fillings 14 are introduced into the cutouts 8 in the form of the die casting process.
- a large number of other shapes are possible to adapt the behavior of the electrical machine.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Induction Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The invention relates to an electric asynchronous machine, especially for driving an electrically driven vehicle, comprising a stator and a rotor with a laminated core. Copper is diecast in the grooves of the rotor.
Description
Elektrische Maschine Electrical machine
Die Erfindung betrifft eine elektrische Maschine ins- besondere zum Antreiben eines Fahrzeuges nach dem Oberbegriff des Anspruchs 1.The invention relates to an electrical machine, in particular for driving a vehicle according to the preamble of claim 1.
Elektrisch angetriebene Fahrzeuge weisen häufig Asynchronmaschinen auf, die mit einem Stator und einem in dem Stator vorgesehenen Rotor ausgebildet sind. Gleichermaßen sind Asynchronmaschinen bekannt, bei denen der Rotor außerhalb des Stators angeordnet ist. Der Rotor wird als Kurzschlußläufer ausgebildet und besteht aus elektrisch leitfähigem Aluminium, das in Form eines Druckgusses zum Rotor geformt wird". Das Alu inum wird bei der Herstellung in die vom Blechpaket des Rotors gebildeten Nuten eingegossen und an den Stirnseiten des Rotors werden die Aluminiumstränge aus den jeweiligen Nuten zu einem Ring zusammengeschlossen und damit kurzgeschlossen (Kurzschlußkäfig) . Gegebenenfalls werden direkt Lüfterflügel mit angegossen. Aluminium ist preiswert, leicht und weist eine hohe elektrische Leitfähigkeit auf.Electrically driven vehicles often have asynchronous machines that are designed with a stator and a rotor provided in the stator. Asynchronous machines are likewise known in which the rotor is arranged outside the stator. The rotor is designed as a short-circuit rotor and is made of electrically conductive aluminum, which is shaped into the rotor in the form of a die-cast ". The aluminum is cast during manufacture into the grooves formed by the laminated core of the rotor and the aluminum strands are made from the end faces of the rotor The respective grooves are combined into a ring and thus short-circuited (short-circuit cage). If necessary, fan blades are cast on directly. Aluminum is inexpensive, light and has a high electrical conductivity.
Dennoch ergeben sich bei Rotoren im Aluminium- Druckgußverfahren Probleme insbesondere bei der Wärmeabfuhr. Dies entsteht im Schwerpunkt durch das ungünstige Längen-/Durchmesserverhältnis des Blechpaketes und der gekapselten Ausführung der elektrischen Maschine, insbesondere aufgrund ihrer Anordnung im Schmutzwasserbereich des Antriebsrades. Das führt dazu, daß die Kapazität der elektrischen Maschine nicht im möglichen Umfang ausgenutzt werden kann, weil sie aufgrund der erzeugten und prinzipbedingt hohen Rotorwärme reduziert betrieben werden muß.
Bekannt ist auch, in den Nuten des Blechpakets Profilstäbe aus blankem Kupfer einzulegen. An den beiden Stirnseiten des Rotors sind diese Stäbe miteinander verbunden, d. h. kurzgeschlossen. Die Verbindung wird durch Hartlöten oder Schweissen hergestellt. Aufgrund der hohen Drehzahlen von Asynchronmaschinen, insbesondere in der Anwendung in elektrisch angetriebenen Fahrzeugen, entstehen Rotationskräfte auf die leitenden Materialien in den Nuten, denen einzelne Stäbe, die in den Nuten angeordnet sind, und deren Verbindungen untereinander nicht gewachsen sind. Ebenso kann die durch hohe Betriebstemperaturen hervorgerufene Wärmedehnung die Stabilität der Kupferstäbe in den Nuten nachteilig beeinflussen. So führt eine konventionelle Ausführung mit in den Nuten angeordneten Kupferprofilstäben bei den hohen Drehzahlen zu Zuverlässigkeitsproblemen.Nevertheless, there are problems with rotors in the die-cast aluminum process, particularly when it comes to heat dissipation. This is mainly due to the unfavorable length / diameter ratio of the laminated core and the encapsulated design of the electrical machine, in particular due to its arrangement in the dirty water area of the drive wheel. The result of this is that the capacity of the electrical machine cannot be used to the fullest extent because it has to be operated in a reduced manner due to the high rotor heat which is generated and which is inherently high. It is also known to insert bare copper profile bars into the grooves of the laminated core. These rods are connected to one another on the two end faces of the rotor, ie short-circuited. The connection is made by brazing or welding. Due to the high speeds of asynchronous machines, particularly when used in electrically powered vehicles, rotational forces arise on the conductive materials in the grooves, which individual rods, which are arranged in the grooves, and their connections with one another are not up to. Likewise, the thermal expansion caused by high operating temperatures can adversely affect the stability of the copper rods in the grooves. A conventional design with copper profile bars arranged in the grooves leads to reliability problems at high speeds.
Der Erfindung liegt die Aufgabe zugrunde, bei einer elektrischen Asynchronmaschine die Rotorwärme zu reduzieren und eine drehzahlfeste Anordnung zu bieten.The invention has for its object to reduce the rotor heat in an electrical asynchronous machine and to provide a speed-resistant arrangement.
Zur Lösung der Aufgabe wird erfindungsgemäß vorgeschlagen, bei einer elektrischen Asynchronmaschine, insbesondere zum Antreiben eines elektrisch angetriebenen Fahrzeuges, mit Stator und Rotor, den gesamten Kurzschlußkäfig des Rotors aus einem Druckguß aus Kupfer vorzusehen.To achieve the object, it is proposed according to the invention to provide the entire short-circuit cage of the rotor from a die-cast copper in an electrical asynchronous machine, in particular for driving an electrically driven vehicle with a stator and rotor.
Eine elektrische Asynchronmaschine mit einem Stator und einem aus Kupferdruckguß gefertigten Rotor soll insbesondere zum Antrieb eines Einzelrades eines elektrisch an- getriebenen Fahrzeuges verwendet werden.An electrical asynchronous machine with a stator and a rotor made of die-cast copper is to be used in particular for driving a single wheel of an electrically driven vehicle.
Der Druckguß weist eine hohe Festigkeit und Verspannung des Kupfer-Materials innerhalb des Rotorblechpaketes
auf, so daß eine Gefährdung des Kupferkäfigs aufgrund von Rotationskräften nicht gegeben ist. Im Gegensatz zu einzelnen Kupferprofilstäben, die an den Stirnseiten des Rotors einzeln verbunden werden müssen, tritt diese Probematik bei einteilig gegossenen Rotoren aus Kupfer nicht auf.Die-casting has high strength and tension of the copper material within the rotor core so that there is no danger to the copper cage due to rotational forces. In contrast to individual copper profile bars, which have to be connected individually on the end faces of the rotor, this problem does not occur with one-piece cast rotors made of copper.
Die Erfindung wird anhand einer Zeichnung näher erläutert: Es zeigen:The invention is explained in more detail with reference to a drawing:
Fig. 1 einen Rotor in Draufsicht undFig. 1 shows a rotor in plan view and
Fig. 2 einen Schnitt durch einen Rotor.Fig. 2 shows a section through a rotor.
Die Fig. 1 zeigt einen innenliegenden Rotor 2 einer hier nicht näher dargestellten elektrischen Maschine. Im Blechpaket 4 des Rotors 2 sind eine Vielzahl einzelner Bleche 6 nebeneinander angeordnet. Die einzelnen Bleche 6 weisen an ihrem Umfang Aussparungen 8 auf. Diese Aussparungen 8 der einzelnen Bleche 6 sind in dem Blechpaket 4 so angeordnet, daß sich für das gesamte Paket 4 jeweils durchgehende Nuten 10 ergeben. In die Nuten 10 wird bei der Herstellung des Rotors bei zusammengepresstem Blechpaket Kupfer eingegossen, so daß sich die Nuten 10 damit füllen. An den axialen Enden des Rotors wird jeweils ein umlaufender1 shows an internal rotor 2 of an electrical machine (not shown here). In the laminated core 4 of the rotor 2, a large number of individual laminations 6 are arranged next to one another. The individual sheets 6 have cutouts 8 on their circumference. These recesses 8 of the individual sheets 6 are arranged in the laminated core 4 so that there are continuous grooves 10 for the entire bundle 4. When the rotor is manufactured, copper is poured into the grooves 10 when the laminated core is compressed, so that the grooves 10 fill with them. At the axial ends of the rotor there is a rotating one
Ring 12 angegossen, der die einzelnen Kupferfüllungen 14 in den Nuten 10 verbindet und damit kurzschließt. Gleichzeitig können an den Ring 12 Lüfterflügel 16 angegossen werden, die eine Verbesserung der Kühlung der elektrischen Maschine bewirken. Der Rotor 2 dreht sich in der elektrischen Maschine um eine gedachte Achse 18.
Die Fig. 2 zeigt einen Schnitt durch den Rotor 2 nach Fig. 1. Auf der in Fig. 1 nicht gezeigten Rotorwelle 20 ist ein Blech 6 gezeigt, das an seinem Umfang eine Anzahl von Aussparungen 8 aufweist. In den Aussparungen 8 sind jeweils Kupferfüllungen 14 in Form des Druckgussverfahrens eingebracht. Neben der hier gezeigten Form der Aussparungen sind eine große Anzahl anderer Formen möglich, um das Verhalten der elektrischen Maschine anzupassen.
Cast on ring 12, which connects the individual copper fillings 14 in the grooves 10 and thus short-circuits. At the same time, fan blades 16 can be cast onto the ring 12, which improve the cooling of the electrical machine. The rotor 2 rotates in the electrical machine about an imaginary axis 18. FIG. 2 shows a section through the rotor 2 according to FIG. 1. On the rotor shaft 20, which is not shown in FIG. 1, a sheet 6 is shown which has a number of cutouts 8 on its circumference. Copper fillings 14 are introduced into the cutouts 8 in the form of the die casting process. In addition to the shape of the recesses shown here, a large number of other shapes are possible to adapt the behavior of the electrical machine.
Bezugszeichenreference numeral
2 Rotor2 rotor
4 Blechpaket4 sheet stack
6 Blech6 sheet
8 Aussparung8 recess
10 Nut10 groove
12 Ring12 ring
14 Kupferfüllung14 copper filling
16 Lüfterflügel16 fan blades
18 Achse18 axis
20 Rotorwelle
20 rotor shaft
Claims
1. Elektrische Asynchronmaschine mit Kurzschlußkä- fig (12, 14, 16), insbesondere zum Antreiben eines elektrisch angetriebenen Fahrzeuges, mit einem Stator und einem in dem oder um den Stator angeordneten Rotor (2) mit Rotorblechpaket (4) , dadurch g e k e n n z e i c h n e t , daß der gesamte Kurzschlußkäfig (12, 14, 16) des Rotors (2) aus einem Druckguß aus Kupfer vorgesehen ist.1. Electrical asynchronous machine with short-circuit cage (12, 14, 16), in particular for driving an electrically driven vehicle, with a stator and a rotor (2) with or in a rotor plate assembly (4) arranged in or around the stator, characterized in that the entire short-circuit cage (12, 14, 16) of the rotor (2) is provided from a die-cast copper.
2. Verwendung einer elektrischen Asynchronmaschine mit einem Stator und einem aus Kupferdruckguß gefertigten Rotor (2) zum Antrieb eines Einzelrades eines elektrisch an- getriebenen Fahrzeuges.
2. Use of an electrical asynchronous machine with a stator and a rotor (2) made of die-cast copper for driving a single wheel of an electrically driven vehicle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19746195A DE19746195A1 (en) | 1997-10-18 | 1997-10-18 | Induction machine for electric vehicle |
| DE19746195.6 | 1997-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1999021268A1 true WO1999021268A1 (en) | 1999-04-29 |
Family
ID=7845997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1998/006444 WO1999021268A1 (en) | 1997-10-18 | 1998-10-12 | Electric machine |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19746195A1 (en) |
| WO (1) | WO1999021268A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009040123A1 (en) | 2008-11-06 | 2010-05-20 | Siemens Aktiengesellschaft | Squirrel-cage rotor, asynchronous motor and turbomachine |
| DE102009010601A1 (en) | 2009-02-25 | 2010-08-26 | Siemens Aktiengesellschaft | Cage rotor manufacturing method for asynchronous machine, involves providing contour of sheet metal shell between casting mold and rotor lamination stack before performing potting process at front sides of lamination stack |
| DE102010021470A1 (en) * | 2010-05-25 | 2011-12-01 | Siemens Aktiengesellschaft | Squirrel cage rotor for an asynchronous machine and method of manufacturing the squirrel cage rotor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4329679A1 (en) * | 1992-09-03 | 1994-03-10 | Hitachi Koki Kk | Mfg. electric motor cage rotor - filling multi-part core bores with molten material to provide motor conductor rods |
| JPH0752664A (en) * | 1993-08-11 | 1995-02-28 | Mitsubishi Electric Corp | In-wheel motor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1028674B (en) * | 1954-05-15 | 1958-04-24 | C O Oeberg & Co S A B Fabrikan | Short circuit runners, especially for small and micro motors |
| DE2741036C2 (en) * | 1977-09-12 | 1981-09-17 | Siemens AG, 1000 Berlin und 8000 München | Squirrel cage with cast-in squirrel cage |
| DE2932952A1 (en) * | 1979-08-14 | 1981-03-26 | Siemens AG, 1000 Berlin und 8000 München | METHOD FOR PRODUCING SHORT CIRCUIT CABLES |
| DE3127965C2 (en) * | 1981-07-10 | 1985-12-12 | Siemens AG, 1000 Berlin und 8000 München | Electric machine with solid rotor and cage winding |
-
1997
- 1997-10-18 DE DE19746195A patent/DE19746195A1/en not_active Withdrawn
-
1998
- 1998-10-12 WO PCT/EP1998/006444 patent/WO1999021268A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4329679A1 (en) * | 1992-09-03 | 1994-03-10 | Hitachi Koki Kk | Mfg. electric motor cage rotor - filling multi-part core bores with molten material to provide motor conductor rods |
| JPH0752664A (en) * | 1993-08-11 | 1995-02-28 | Mitsubishi Electric Corp | In-wheel motor |
Non-Patent Citations (1)
| Title |
|---|
| PATENT ABSTRACTS OF JAPAN vol. 095, no. 005 30 June 1995 (1995-06-30) * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19746195A1 (en) | 1999-04-22 |
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