WO2007031373A1 - Liquid-cooled rotary electric machine - Google Patents

Liquid-cooled rotary electric machine Download PDF

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Publication number
WO2007031373A1
WO2007031373A1 PCT/EP2006/065076 EP2006065076W WO2007031373A1 WO 2007031373 A1 WO2007031373 A1 WO 2007031373A1 EP 2006065076 W EP2006065076 W EP 2006065076W WO 2007031373 A1 WO2007031373 A1 WO 2007031373A1
Authority
WO
WIPO (PCT)
Prior art keywords
electric machine
rotary electric
machine according
stator
cooling channel
Prior art date
Application number
PCT/EP2006/065076
Other languages
German (de)
French (fr)
Inventor
Reiner Seufert
Erich Bott
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2007031373A1 publication Critical patent/WO2007031373A1/en

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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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets

Definitions

  • the invention relates to a rotary electric machine with a liquid-cooled stator.
  • Comparatively large electric motors or intensively utilized electric motors are water-cooled.
  • grooves are milled in the housing of the stator, in which a copper tube is inserted, through which a coolant is passed.
  • a disadvantage is that relatively low Kunststoffflä ⁇ surface for the heat transfer between the tube and the housing or the laminate stack of the stator at caseless machines. This inadequate heat transfer can be improved somewhat by thermally conductive pastes.
  • annular grooves are milled into a stator housing, which are interconnected by interruptions. Through these grooves, the cooling liquid flows.
  • the disadvantage here is basically the design effort to achieve adequate cooling of an electrical machine.
  • the solution of the object is achieved by a rotie ⁇ - generating electrical machine with a liquid-cooled stator, wherein at least one cooling channel-forming element is cast in ei ⁇ nem metal plastic hybrid.
  • the erfindungsge- Permitted metal-plastic hybrid comprises a thermoplastics, a is in the range between 100 0 C and 400 0 C melting metal compound and an electrically conductive and / or metallic filler.
  • electrically conductive and / or metallic filler all conventional electrically conductive fillers such as fibers and / or particles of metal, metal alloys (normal- so high melting, as copper, steel, etc.), carbon black, Kohlefa ⁇ fibers intrinsically conductive polymers (eg, acetylene, Polythi - Ophen) etc. used.
  • Commercially available Metallfa ⁇ fibers copper fibers, steel fibers, etc.
  • the length of the fiber is preferably Zvi ⁇ rule 1 and 10 mm, the thickness should be preferably microns ⁇ 100th
  • the conductive fillers may be particulate, for example, balls, platelets or flakes, etc. The size of the particles should be ⁇ 100 microns, preferably ⁇ 50 microns.
  • thermoplastic all thermoplastics available on the market can be used, which can be selected according to the required property profile.
  • the metal-plastic hybrid contains example ⁇ example one of the following polymers: commodity plastics such as polystyrene or polypropylene, etc. and / or a technical ULTRASONIC thermoplastic such as polyamide or polybutylene terephthalate, etc., or as a high temperature thermoplastic is a polyetherimide, a polyphenylene sulphide, a partially aromatic polyamide, etc. Of course, all common blends and thermoplastic elastomers can be used.
  • a low-melting metal alloy is understood as meaning a metallic compound whose melting point or melting range is between 100 ° C. and 400 ° C.
  • metal compounds with a melting point / melting range of> 300 ° C application.
  • Both low-melting metal alloys having a melting range and those having a melting point can be used according to the invention.
  • the metallic compound includes substantially metals, but can also be any To ⁇ rates, in particular also non-metallic additives and Addi tive ⁇ have.
  • a feature of the low melting metal alloy with melting point is an immediate and drastic viscosity drop to ⁇ 50 mPa s when the melting point is exceeded. This extremely low, almost water-like viscosity in compound contributes significantly to the high flowability at high fill levels and fillers.
  • the proportions of low-melting metal alloy and electrically conductive filler can be varied within a wide range, generally between 1 to> 95% by weight, in particular between 10 and 80% by weight and between 20 and 75% by weight.
  • these compounds can still be processed by injection molding using a total amount of conductive components (low-melting metal compound plus filler of> 80% by weight). This is only achieved by combining the two conductive components in thermoplastics. Due to low specific volume resistances, the generation of heat loss in components is strongly limited . In addition, in combination with the high thermal conductivity of the compounds, which is preferably above 5 W / mK up to> 10 W / mK, is removed very effectively.
  • the material is manufactured and processed at a temperature at which both the low melting metallic alloy and the thermoplastic are in a molten state.
  • This fusible alloy comprising an inorganic and an organic component, has an extremely high flowability, so that even fill ⁇ materials, so particles and / or fibers can be added to a high Ge ⁇ weight share without losing the good flow or processing properties. That is, without causing too much increase in the viscosity.
  • the compounds can be prepared both batchwise on a kneader and continuously on an extruder.
  • the measurement of the volume resistivity was carried out on test specimens which were produced by injection molding.
  • the body made of the metal plastic hybrid according to the invention e.g.
  • the cooling jacket is produced by the usual plastic molding processes such as injection molding, extrusion, deep drawing, etc.
  • the cooling channel-forming element is designed as a helix having its inlet on one side of the stator and its outlet on the other side of the stator.
  • inlet and outlet on one side of the stator so that Anflanscharbei ⁇ th for the cooling system are much easier.
  • the helixes of the Hinleiters are at least offset by a distance corresponding to the diameter of a helix, this means that the return line is to be arranged in the interstices of these cooling channel-forming elements, so that two nested spirals are present as a cooling jacket around the stator ,
  • the pitch of the helixes can be predetermined and is correspondingly lower in the region of larger heat sources in order to be able to absorb more heat loss.
  • the cooling channels can be formed as a meandering ausgestalte ⁇ ter coat around the stator.
  • the cooling channel-forming member is surrounded on all sides by the metal art ⁇ material hybrid.
  • the cooling channel-forming elements are also contacted directly with the stator or the housing of the rotating electrical machine.
  • the cooling channel-forming elements are advantageously designed round or rectangular.
  • a cooling channel ⁇ forming elements is surrounded by a metal plastic hybrid that has been applied by injection molding.
  • flanges can be formed by injection molding so that the assembly of further auxiliary modules is facilitated.
  • FIG 2 overmolded cooling coil with rectangular cooling channel ⁇ forming elements.
  • the cooling jacket 2 shows a helical arranged cooling coil 4 with an inlet 3 and an outlet 5, in which the cooling liquid is guided helically around the stator 1 and thereby the heat loss ⁇ leads.
  • the cooling channel-forming elements 4, which are designed as a coil, are in their diameter as high as the thickness of the cooling jacket 2. This ensures direct contact of the cooling channel-forming elements with the stator 1.
  • the height of the cooling jacket 2 can be greater than the diameter of the cooling channel-forming element. 4, so that the cooling channel-forming elements 4 are completely surrounded by the plastic metal hybrid.
  • FIG 2 shows the same embodiment in principle as FIG 1, except that the cooling channel forming elements 4 thereby have a rectangular eckförmigen cross-section.

Abstract

Disclosed is a rotary electric machine comprising a liquid-cooled stator (1). At least one element (4) forming a cooling duct is cast into a metal/plastic hybrid.

Description

Beschreibungdescription
Rotierende elektrische Maschine mit FlüssigkeitskühlungRotary electric machine with liquid cooling
Die Erfindung betrifft eine rotierende elektrische Maschine mit einem flüssigkeitsgekühlten Stator.The invention relates to a rotary electric machine with a liquid-cooled stator.
Vergleichsweise große Elektromotoren oder auch intensiv ausgenutzte Elektromotoren werden wassergekühlt. Dazu sind in dem Gehäuse des Stators Nuten gefräst, in die ein Kupferrohr eingelegt ist, durch das ein Kühlmittel geleitet wird. Nachteilig dabei ist, die vergleichsweise geringe Kontaktflä¬ che für den Wärmeübergang zwischen dem Rohr und dem Gehäuse oder dem Blechpaket des Stators bei gehäuselosen Maschinen. Dieser mangelhafte Wärmeübergang kann durch wärmeleitfähige Pasten etwas verbessert werden.Comparatively large electric motors or intensively utilized electric motors are water-cooled. For this purpose, grooves are milled in the housing of the stator, in which a copper tube is inserted, through which a coolant is passed. A disadvantage is that relatively low Kontaktflä ¬ surface for the heat transfer between the tube and the housing or the laminate stack of the stator at caseless machines. This inadequate heat transfer can be improved somewhat by thermally conductive pastes.
In der DE 28 28 473 sind beispielsweise Ringnuten in ein Ständergehäuse gefräst, die durch Unterbrechungen miteinander verbunden sind. Durch diese Nuten fließt die Kühlflüssigkeit.In DE 28 28 473, for example, annular grooves are milled into a stator housing, which are interconnected by interruptions. Through these grooves, the cooling liquid flows.
Allgemein bekannt sind auch axial verlaufende Kühlkanäle, die an den Stirnseiten eines Stators durch geeignete Mittel umge¬ lenkt werden und dadurch über den Umfang des Stators einen Kühlkreislauf bilden.Also known generally axially extending cooling channels, the reverse on the end faces of a stator by suitable means ¬ are deflected and thereby form a cooling circuit around the circumference of the stator.
Nachteilig dabei ist grundsätzlich der konstruktive Aufwand um eine ausreichende Kühlung einer elektrischen Maschine zu erzielen.The disadvantage here is basically the design effort to achieve adequate cooling of an electrical machine.
Ausgehend davon liegt der Erfindung die Aufgabe zugrunde, ei¬ ne effiziente Kühlung eines Stators einer rotierenden elekt¬ rischen Maschine zu schaffen, und dabei den Herstellungsauf¬ wand des Kühlsystems gegenüber vergleichsweisen Kühlsystemen zu reduzieren.Assuming the invention has for its object to provide egg ¬ ne efficient cooling of a stator of a rotating machine elekt ¬ step, and thereby Herstellungsauf ¬ wall of the cooling system over comparatively cooling systems to be reduced.
Des Weiteren soll eine Berührungssicherheit des Gehäuses vor¬ liegen. Die Lösung der gestellten Aufgabe gelingt durch eine rotie¬ rende elektrische Maschine mit einem flüssigkeitsgekühlten Stator, wobei zumindest ein kühlkanalbildendes Element in ei¬ nem Metallkunststoffhybrid eingegossen ist. Das erfindungsge- mäße Metallkunststoffhybrid umfasst einen Thermoplasten, eine im Bereich zwischen 1000C und 4000C schmelzende Metallverbindung und einen elektrisch leitenden und/oder metallischen Füllstoff.Furthermore, should be a touch of the housing security before ¬. The solution of the object is achieved by a rotie ¬- generating electrical machine with a liquid-cooled stator, wherein at least one cooling channel-forming element is cast in ei ¬ nem metal plastic hybrid. The erfindungsge- Permitted metal-plastic hybrid comprises a thermoplastics, a is in the range between 100 0 C and 400 0 C melting metal compound and an electrically conductive and / or metallic filler.
Als elektrisch leitfähiger und/oder metallischer Füllstoff kommen alle gängigen elektrisch leitenden Füllstoffe wie Fasern und/oder Partikel aus Metall, Metalllegierungen (normal- also hochschmelzend, z.B. Kupfer, Stahl etc.) Ruß, Kohlefa¬ sern intrinsisch leitfähige Polymere (z.B. Acetylen, Polythi- ophen) etc. zum Einsatz. Es können handelsübliche Metallfa¬ sern (Kupferfasern, Stahlfasern, etc.) und/oder Kohlefasern eingesetzt werden. Die Länge der Faser liegt bevorzugt zwi¬ schen 1 und 10 mm, die Dicke sollte bevorzugt < 100 μm sein. Weiterhin können die leitfähigen Füllstoffe partikelförmig sein, z.B. Kugeln, Plättchen oder Flakes etc. Die Größe der Partikel sollte dabei < 100 μm, bevorzugt < 50 μm sein.As an electrically conductive and / or metallic filler all conventional electrically conductive fillers such as fibers and / or particles of metal, metal alloys (normal- so high melting, as copper, steel, etc.), carbon black, Kohlefa ¬ fibers intrinsically conductive polymers (eg, acetylene, Polythi - Ophen) etc. used. Commercially available Metallfa ¬ fibers (copper fibers, steel fibers, etc.) and / or carbon fibers are used. The length of the fiber is preferably Zvi ¬ rule 1 and 10 mm, the thickness should be preferably microns <100th Furthermore, the conductive fillers may be particulate, for example, balls, platelets or flakes, etc. The size of the particles should be <100 microns, preferably <50 microns.
Als Thermoplast sind alle am Markt angebotenen Thermoplaste verwendbar, die je nach gefordertem Eigenschaftsprofil ausge- wählt werden können.As thermoplastic, all thermoplastics available on the market can be used, which can be selected according to the required property profile.
Als Thermoplast enthält das Metallkunststoffhybrid beispiels¬ weise eines der folgenden Polymere: Massenkunststoffe wie ein Polystyrol oder ein Polypropylen etc. und/oder ein techni- sches Thermoplast wie Polyamid oder Polybutylenterephthalat etc. oder als Hochtemperaturthermoplasten ein Polyetherimid, ein Polyphenylensulfid, ein teilaromatisches Polyamid etc. Selbstverständlich können auch alle gängigen Blends und thermoplastischen Elastomere eingesetzt werden.As a thermoplastic, the metal-plastic hybrid contains example ¬ example one of the following polymers: commodity plastics such as polystyrene or polypropylene, etc. and / or a technical ULTRASONIC thermoplastic such as polyamide or polybutylene terephthalate, etc., or as a high temperature thermoplastic is a polyetherimide, a polyphenylene sulphide, a partially aromatic polyamide, etc. Of course, all common blends and thermoplastic elastomers can be used.
Unter einer niedrig schmelzenden Metalllegierung wird eine metallische Verbindung verstanden, deren Schmelzpunkt bzw. Schmelzbereich zwischen 1000C und 4000C liegt. Für Hochtempe- raturthermoplaste, die teilweise Verarbeitungstemperaturen von > 400 ° C erfordern, können auch Metallverbindungen mit einem Schmelzpunkt/Schmelzbereich von > 300° C Anwendung finden. Sowohl niedrig schmelzende Metalllegierungen mit einem Schmelzbereich, als auch solche mit einem Schmelzpunkt können erfindungsgemäß eingesetzt werden. Die metallische Verbindung umfasst im wesentlichen Metalle, kann aber auch beliebige Zu¬ sätze, insbesondere auch nicht-metallische Zusätze und Addi¬ tive aufweisen.A low-melting metal alloy is understood as meaning a metallic compound whose melting point or melting range is between 100 ° C. and 400 ° C. For high tea Raturthermoplaste, which require partial processing temperatures of> 400 ° C, can also find metal compounds with a melting point / melting range of> 300 ° C application. Both low-melting metal alloys having a melting range and those having a melting point can be used according to the invention. The metallic compound includes substantially metals, but can also be any To ¬ rates, in particular also non-metallic additives and Addi tive ¬ have.
Ein Merkmal der niedrig schmelzenden Metalllegierung mit Schmelzpunkt ist ein unmittelbarer und drastischer Viskositätsabfall auf < 50 mPa s beim Überschreiten des Schmelzpunktes. Diese extrem niedrige, fast wasserähnliche Viskosität trägt in Compound entscheidend zum hohen Fließvermögen bei hohen Füllgraden und Füllstoffen bei.A feature of the low melting metal alloy with melting point is an immediate and drastic viscosity drop to <50 mPa s when the melting point is exceeded. This extremely low, almost water-like viscosity in compound contributes significantly to the high flowability at high fill levels and fillers.
Je nach Anforderung können die Anteile an niedrig schmelzenden Metalllegierung und elektrisch leitfähigen Füllstoff in einem weiten Bereich variiert werden, allgemein zwischen 1 bis > 95 Gew.-%, insbesondere zwischen 10 und 80 Gew.-% und zwischen 20 und 75 Gew.-%.Depending on requirements, the proportions of low-melting metal alloy and electrically conductive filler can be varied within a wide range, generally between 1 to> 95% by weight, in particular between 10 and 80% by weight and between 20 and 75% by weight. ,
Vorteilhafterweise lassen sich diese Compounds mit einem Ge- samtanteil an leitfähigen Komponenten (niedrig schmelzende Metallverbindung plus Füllstoff von > 80 Gew.-%) noch im Spritzgießverfahren verarbeiten. Dies wird nur durch die Kombination der beiden leitfähigen Komponenten in Thermoplasten erreicht. Durch niedrige spezifische Durchgangswiderstände wird das Entstehen von Verlustwärme in Bauteile stark be¬ grenzt. Die überdies in Kombination mit der hohen thermischen Leitfähigkeit der Compounds, die bevorzugt über 5 W/mK bis zu > 10 W/mK beträgt, sehr effektiv abgeführt wird.Advantageously, these compounds can still be processed by injection molding using a total amount of conductive components (low-melting metal compound plus filler of> 80% by weight). This is only achieved by combining the two conductive components in thermoplastics. Due to low specific volume resistances, the generation of heat loss in components is strongly limited . In addition, in combination with the high thermal conductivity of the compounds, which is preferably above 5 W / mK up to> 10 W / mK, is removed very effectively.
Vorteilhafterweise wird der Werkstoff bei einer Temperatur hergestellt und verarbeitet, bei der sowohl die niedrig schmelzende metallische Legierung als auch der Thermoplast in schmelzflüssigem Zustand vorliegen. Diese Schmelzlegierung, eine anorganische und eine organische Komponente umfassend, besitzt eine extrem hohe Fließfähigkeit, so dass noch Füll¬ stoffe, also Partikel und/oder Fasern zu einem hohen Ge¬ wichtsanteil zugeschlagen werden können, ohne die guten Fließ- bzw. Verarbeitungseigenschaften zu verlieren. D.h. ohne einen zu starken Anstieg der Viskosität zu bewirken.Advantageously, the material is manufactured and processed at a temperature at which both the low melting metallic alloy and the thermoplastic are in a molten state. This fusible alloy, comprising an inorganic and an organic component, has an extremely high flowability, so that even fill ¬ materials, so particles and / or fibers can be added to a high Ge ¬ weight share without losing the good flow or processing properties. That is, without causing too much increase in the viscosity.
Die Herstellung der Compounds kann sowohl diskontinuierlich auf einem Kneter als auch kontinuierlich auf einem Extruder erfolgen. Die Messung des spezifischen Durchgangswiderstandes wurde an Probekörpern durchgeführt, die im Spritzgießverfahren hergestellt wurden.The compounds can be prepared both batchwise on a kneader and continuously on an extruder. The measurement of the volume resistivity was carried out on test specimens which were produced by injection molding.
Die aus dem erfindungsgemäßen Metallkunststoffhybrid herge- stellten Körper, wie z.B. der Kühlmantel werden durch die üblichen Kunststoffformgebungsprozesse wie Spritzguss, Extrusi- on, Tiefziehen etc. produziert.The body made of the metal plastic hybrid according to the invention, e.g. The cooling jacket is produced by the usual plastic molding processes such as injection molding, extrusion, deep drawing, etc.
Vorteilhafterweise wird das kühlkanalbildende Element als Wendel ausgeführt, das seinen Einlass auf der einen Seite des Stators und seinen Auslass auf der anderen Seite des Stators aufweist. In einer bevorzugten Ausführungsform sind Ein- und Auslass auf einer Seite des Stators, so dass Anflanscharbei¬ ten für das Kühlsystem wesentlich erleichtert werden.Advantageously, the cooling channel-forming element is designed as a helix having its inlet on one side of the stator and its outlet on the other side of the stator. In a preferred embodiment, inlet and outlet on one side of the stator, so that Anflanscharbei ¬ th for the cooling system are much easier.
In einer bevorzugten Ausführungsform sind dabei die Wendeln des Hinleiters zumindest um einen Abstand versetzt, der dem Durchmesser einer Wendel entspricht, dies bedeutet, dass die Rückleitung in den Zwischenräumen dieser kühlkanalbildenden Elemente anzuordnen ist, so dass zwei ineinander verschachtelnde Wendeln als Kühlmantel um den Stator vorliegen.In a preferred embodiment, the helixes of the Hinleiters are at least offset by a distance corresponding to the diameter of a helix, this means that the return line is to be arranged in the interstices of these cooling channel-forming elements, so that two nested spirals are present as a cooling jacket around the stator ,
Die Ganghöhe der Wendeln ist vorbestimmbar und ist im Bereich größerer Wärmequellen dementsprechend geringer, um mehr Ver- lustwärme aufnehmen zu können.The pitch of the helixes can be predetermined and is correspondingly lower in the region of larger heat sources in order to be able to absorb more heat loss.
Ebenso können die Kühlkanäle als mäanderförmige ausgestalte¬ ter Mantel um den Stator gebildet werden. Vorteilhafterweise ist das kühlkanalbildende Element allseitig vom Metallkunst¬ stoffhybrid umgeben. Falls aber eine direktere Abführung der Verlustwärme notwendig sein sollte, sind die kühlkanalbilden- den Elemente auch direkt mit dem Stator bzw. dem Gehäuse der rotierenden elektrischen Maschine kontaktiert.Likewise, the cooling channels can be formed as a meandering ausgestalte ¬ ter coat around the stator. advantageously, the cooling channel-forming member is surrounded on all sides by the metal art ¬ material hybrid. However, if a more direct dissipation of the lost heat should be necessary, the cooling channel-forming elements are also contacted directly with the stator or the housing of the rotating electrical machine.
Die kühlkanalbildenden Elemente sind vorteilhafterweise rund oder rechteckförmig ausgeführt.The cooling channel-forming elements are advantageously designed round or rectangular.
In einer bevorzugten Ausführungsform wird ein die kühlkanal¬ bildenden Elemente von einem Metallkunststoffhybrid umgeben, dass durch Spritzguss aufgebracht worden ist. Durch Spritz- guss können des Weiteren Flansche gebildet werden, so dass die Montage weiterer Hilfsmodule erleichtert wird.In a preferred embodiment, a cooling channel ¬ forming elements is surrounded by a metal plastic hybrid that has been applied by injection molding. In addition, flanges can be formed by injection molding so that the assembly of further auxiliary modules is facilitated.
Die Erfindung sowie weitere vorteilhafte Ausgestaltungen der Erfindungen werden anhand zweier Ausführungsbeispiele näher erläutert. Dabei zeigt:The invention and further advantageous embodiments of the invention will be explained in more detail with reference to two embodiments. Showing:
FIG 1 umspritzte Kühlwendel mit runden kühlkanalbildenden1 overmolded cooling coil with round cooling channel forming
Elementen,elements,
FIG 2 umspritzte Kühlwendel mit rechteckförmigen kühlkanal¬ bildenden Elementen.FIG 2 overmolded cooling coil with rectangular cooling channel ¬ forming elements.
FIG 1 zeigt einen Kühlmantel einer nicht näher dargestellten rotierenden elektrischen Maschine, die einen prinzipiell dargestellten Stator 1 oder ein Gehäuse aufweist, das durch einen Kühlmantel 2 umgeben ist. Der Kühlmantel 2 zeigt eine wendeiförmige angeordnete Kühlschlange 4 mit einem Einlass 3 und einem Auslass 5, bei der die Kühlflüssigkeit wendeiförmig um den Stator 1 geführt wird und dadurch die Verlustwärme ab¬ führt. Die kühlkanalbildenden Elemente 4, die als Rohrschlange ausgeführt sind, sind in ihrem Durchmesser so hoch wie die Dicke des Kühlmantels 2. Dadurch ist ein direkter Kontakt der kühlkanalbildenden Elemente mit dem Stator 1 gewährleistet.1 shows a cooling jacket of a rotary electric machine, not shown, which has a stator 1 shown in principle or a housing which is surrounded by a cooling jacket 2. The cooling jacket 2 shows a helical arranged cooling coil 4 with an inlet 3 and an outlet 5, in which the cooling liquid is guided helically around the stator 1 and thereby the heat loss ¬ leads. The cooling channel-forming elements 4, which are designed as a coil, are in their diameter as high as the thickness of the cooling jacket 2. This ensures direct contact of the cooling channel-forming elements with the stator 1.
In einer weiteren Ausführungsform kann die Höhe des Kühlmantels 2 größer als der Durchmesser der kühlkanalbildenden EIe- mente 4 sein, so dass die kühlkanalbildenden Elemente 4 komplett von dem Kunststoffmetallhybrid umgeben sind.In a further embodiment, the height of the cooling jacket 2 can be greater than the diameter of the cooling channel-forming element. 4, so that the cooling channel-forming elements 4 are completely surrounded by the plastic metal hybrid.
FIG 2 zeigt die im Prinzip gleiche Ausführungsform wie FIG 1, nur dass die kühlkanalbildenden Elemente 4 dabei einen recht- eckförmigen Querschnitt aufweisen. FIG 2 shows the same embodiment in principle as FIG 1, except that the cooling channel forming elements 4 thereby have a rectangular eckförmigen cross-section.

Claims

Patentansprüche claims
1. Rotierende elektrische Maschine mit einem flüssigkeitsge- kühlten Stator (1), wobei zumindest ein kühlkanalbildendes Element (4) in einem Metallkunststoffhybrid eingegossen ist.1. Rotary electric machine with a liquid-cooled stator (1), wherein at least one cooling channel-forming element (4) is cast in a metal plastic hybrid.
2. Rotierende elektrische Maschine nach Anspruch 1, d a - d u r c h g e k e n n z e i c h n e t , dass das kühl- kanalbildende Element (4) als Wendel ausgeführt ist.2. Rotary electric machine according to claim 1, characterized in that the cooling channel-forming element (4) is designed as a helix.
3. Rotierende elektrische Maschine nach Anspruch 2, d a ¬ d u r c h g e k e n n z e i c h n e t , dass Einlass (3) und Auslass (5) der Wendel (4) sich auf unterschiedlichen Stirnseiten des Stators (1) befinden.3. Rotary electric machine according to claim 2, ¬ characterized in that inlet (3) and outlet (5) of the coil (4) are located on different end faces of the stator (1).
4. Rotierende elektrische Maschine nach Anspruch 2, d a - d u r c h g e k e n n z e i c h n e t , dass sich Ein- (3) und Auslass (5) der Wendel (4) auf einer Seite des Sta¬ tors (1) befinden.4. Rotary electric machine according to claim 2, characterized - characterized in that the inlet (3) and outlet (5) of the helix (4) on one side of the Sta ¬ gate (1) are located.
5. Rotierende elektrische Maschine nach Anspruch 3, d a ¬ d u r c h g e k e n n z e i c h n e t , dass eine Win¬ dung der Wendel (4) einen Abstand von der nächsten Windung aufweist, die zumindest dem Durchmesser des kühlkanalbilden- den Rohres entspricht, so dass sich eine Doppelwendel ausbil¬ det, in der Hin- und Rückleitung des Flüssigkeitsmediums stattfindet .5. Rotary electric machine according to claim 3, ¬ characterized in that a Win ¬ tion of the coil (4) has a distance from the next turn, which corresponds at least to the diameter of the cooling channel forming the tube, so that a double helix ausbil ¬ det , takes place in the forward and return line of the liquid medium.
6. Rotierende elektrische Maschine nach Anspruch 1, d a - d u r c h g e k e n n z e i c h n e t , dass das kühlka- nalbildende Element (4) mäanderförmig um den Stator (1) gelegt ist.6. The rotary electric machine according to claim 1, characterized in that the cooling channel-forming element (4) is laid meander-shaped around the stator (1).
7. Rotierende elektrische Maschine nach Anspruch 5, d a - d u r c h g e k e n n z e i c h n e t , dass die Doppel¬ wendel einen Kühlmantel (2) ausbildet. 7. Rotary electrical machine according to claim 5, characterized - characterized in that the double helix ¬ a cooling jacket (2) is formed.
8. Rotierende elektrische Maschine nach einem der vorherge¬ henden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass das kühlkanalbildende Element (4) direkt am Stator (1) oder am Gehäuse des Stators (1) anliegt.8. Rotary electric machine according to one of vorherge ¬ existing claims, characterized in that the cooling channel-forming element (4) directly on the stator (1) or on the housing of the stator (1).
9. Rotierende elektrische Maschine nach einem der Ansprüche 1 bis 6, d a d u r c h g e k e n n z e i c h n e t , dass die kühlkanalbildenden Element (4) allseitig vom Metall- kunststoffhybrid umgeben sind.9. The rotary electric machine according to claim 1, wherein the cooling channel-forming elements are surrounded on all sides by the metal-plastic hybrid.
10. Rotierende elektrische Maschine nach einem der vorherge¬ henden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass die kühlkanalbildenden Elemente (4) rohrförmig oder rechteckförmig ausgebildet sind.10. Rotary electric machine according to one of vorherge ¬ existing claims, characterized in that the cooling channel-forming elements (4) are tubular or rectangular.
11. Rotierende elektrische Maschine nach einem der vorherge¬ henden Ansprüche, d a d u r c h g e k e n n z e i c h n e t , dass das Metallkunststoffhybrid durch einen Spritz¬ gussvorgang aufgebracht wird.11. Rotary electrical machine according to one of vorherge ¬ existing claims, characterized in that the metal plastic hybrid is applied by an injection molding process ¬ .
12. Rotierende elektrische Maschine nach Anspruch 11, d a ¬ d u r c h g e k e n n z e i c h n e t, dass durch den Spritzguss weitere vorteilhafte Formgebungen an den Stator (1) stattfinden, wie Ausbildung von Flanschen. 12. Rotary electric machine according to claim 11, ¬ characterized in that take place by the injection molding further advantageous shapes to the stator (1), such as formation of flanges.
PCT/EP2006/065076 2005-09-12 2006-08-04 Liquid-cooled rotary electric machine WO2007031373A1 (en)

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