DE19618996A1 - Electrical machine with power electronics in connection box - Google Patents

Electrical machine with power electronics in connection box

Info

Publication number
DE19618996A1
DE19618996A1 DE19618996A DE19618996A DE19618996A1 DE 19618996 A1 DE19618996 A1 DE 19618996A1 DE 19618996 A DE19618996 A DE 19618996A DE 19618996 A DE19618996 A DE 19618996A DE 19618996 A1 DE19618996 A1 DE 19618996A1
Authority
DE
Germany
Prior art keywords
terminal box
machine
air flow
electrical machine
fan
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.)
Withdrawn
Application number
DE19618996A
Other languages
German (de)
Inventor
Wilhelm Dipl Ing Leupold
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Priority to DE19618996A priority Critical patent/DE19618996A1/en
Priority to DE29708355U priority patent/DE29708355U1/en
Publication of DE19618996A1 publication Critical patent/DE19618996A1/en
Withdrawn legal-status Critical Current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
    • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
    • H02K5/225—Terminal boxes or connection arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

The machine has power electronics mounted in a connection box (3) mounted on the machine housing (2) and at least partially cooled by a cooling air flow (12) from the machine's fan (5). The loss heat is carried away over the surface of the connection box. The partial air flow is branched off from the cooling air flow by means of a branch channel (6) and directed at the connection box. The branch channel is mounted on the outside of the fan hood (4) enclosing the machine's fan.

Description

Die Erfindung betrifft eine elektrische Maschine gemäß dem Oberbegriff des Anspruches 1.The invention relates to an electrical machine according to the Preamble of claim 1.

Eine solche Maschine ist durch die DE-A-36 42 724 bekannt. Bei dieser bekannten Maschine ist die Leistungselektronik ei­ nes Frequenzumrichters im Klemmenkasten der Maschine einge­ baut, wobei die Elemente des Frequenzumrichters mit minde­ stens einer Wand des Klemmenkastens in wärmeleitender Verbin­ dung stehen. Um eine gute Wärmeableitung über den Klemmenka­ sten zu erzielen, ist dieser mit freiem Abstand zur Oberflä­ che der Maschine angeordnet, so daß der die Maschine über­ streichende Kühlluftstrom unter dem Klemmenkasten hindurch­ strömt und diesen zumindest an seiner Unterseite kühlt.Such a machine is known from DE-A-36 42 724. In this known machine, the power electronics is egg frequency converter in the terminal box of the machine builds, with the elements of the frequency converter with min at least one wall of the terminal box in a thermally conductive connection stand. To ensure good heat dissipation via the terminals To achieve this, this must be at a clear distance from the surface che arranged the machine so that the machine over flowing cooling air flow under the terminal box flows and cools it at least on its underside.

Auf diese Weise kann bis zu einer bestimmten Leistungsgröße der Maschine der im Klemmenkasten eingebaute Frequenzumrich­ ter ausreichend gekühlt werden. Probleme ergeben sich bei ei­ ner Leistungssteigerung der Maschine. Infolge einer Lei­ stungssteigerung vergrößert sich das Volumen der Maschine. Da das Volumen der Maschine mit der dritten Potenz wächst, deren für die Wärmeabführung maßgebliche Oberfläche dagegen nur mit der zweiten Potenz, ist eine ausreichende Wärmeabfuhr bei der bekannten Maschinenausführung ab einer gewissen Leistungs­ größe nicht mehr gewährleistet.This way, up to a certain benefit the frequency converter installed in the terminal box be cooled sufficiently. Problems arise with egg performance increase of the machine. As a result of a lei performance increases the volume of the machine. There the volume of the machine grows with the third power whose surface relevant for heat dissipation, however, only with the second power is sufficient heat dissipation at the known machine design from a certain performance size no longer guaranteed.

Der Erfindung liegt die Aufgabe zugrunde, eine Maschine der eingangs beschriebenen Art derart weiterzubilden, daß auch Maschinen mit größerer Leistung noch mit einer im Klemmenka­ sten eingebauten Leistungselektronik ausgeführt werden kön­ nen.The invention has for its object a machine type described at the outset such that also Machines with higher performance still with one in the terminals most built-in power electronics can be executed nen.

Die Lösung der gestellten Aufgabe gelingt durch die im Kenn­ zeichen des Anspruches 1 angegebenen Merkmale. Durch die ge­ zielte Lenkung des Teilluftstromes auf den Klemmenkasten kann ein wesentlich größerer Teil der Oberfläche des Klemmenka­ stens für die Kühlung genutzt werden.The task is solved by the in the Kenn Character of claim 1 specified features. By the ge  Targeted routing of the partial air flow to the terminal box can a much larger part of the surface of the Klemmka be used for cooling.

Zweckmäßigerweise wird der Abzweigkanal am Umfang der den Ma­ schinenlüfter umgebenden Lüfterhaube vorgesehen. Am Umfang der Lüfterhaube ist ausreichend Platz für den Anschluß eines solchen Abzweigkanales vorhanden. Außerdem läßt sich der Teilluftstrom wegen der Fliehkraft am Umfang der Lüfterhaube besonders günstig ableiten.The branch duct is expediently arranged on the circumference of the Ma fan hood surrounding the fan. At the extent the fan cover is sufficient space for connecting one such branch duct available. In addition, the Partial airflow due to the centrifugal force on the circumference of the fan cover derive particularly cheap.

Nach einer weiteren Ausgestaltung der Erfindung ergibt sich eine konstruktiv besonders einfache Ausführungsform von Lüf­ terhaube und Abzweigkanal dadurch, daß am Umfang der Lüfter­ haube eine nach radial außen ragende, axial vor dem Klemmen­ kasten liegende, kappenartige Ausbuchtung vorgesehen ist, die zur betreffenden Stirnseite des Klemmenkastens hin offen ist.According to a further embodiment of the invention a structurally particularly simple embodiment of Lüf terhaube and branch duct in that on the circumference of the fan hood a protruding radially outward, axially before clamping box lying, cap-like bulge is provided, the is open towards the relevant end face of the terminal box.

Dadurch, daß die Ausbuchtung in ihrer radialen Höhe und um­ fangsmäßigen Erstreckung der Höhe und Breite des Klemmenka­ stens angepaßt ist, wird eine intensive Hinlenkung des Teil­ luftstromes auf alle freien Seiten des Klemmenkastens er­ reicht.Because the bulge in its radial height and around initial extension of the height and width of the terminals is most adapted, there is an intense articulation of the part airflow to all free sides of the terminal box enough.

Anhand eines in der Zeichnung dargestellten Ausführungsbei­ spiels wird die Erfindung nachfolgend näher beschrieben. Es zeigt:Based on an exemplary embodiment shown in the drawing The invention is described in more detail below. It shows:

Fig. 1 eine elektrische Maschine in perspektivischer Darstellung, Fig. 1 shows an electrical machine in a perspective view;

Fig. 2 eine elektrische Maschine in Seitenansicht, Fig. 2 is an electrical machine in side view,

Fig. 3 eine Lüfterhaube in Draufsicht auf deren der Maschine zugewandten Seite. Fig. 3 is a fan cover in plan view on the side facing the machine.

Mit 1 ist eine elektrische Maschine bezeichnet, bei der auf der Oberseite ihres Maschinengehäuses 2 ein Klemmenkasten 3 angeordnet ist. In diesem Klemmenkasten 3 ist eine Leistungs­ elektronik, z. B. ein Frequenzumrichter zur Drehzahlsteuerung der Maschine 1 eingebaut. Auf der der Antriebsseite der Maschine 1 abgekehrten Stirnseite ist ein von einer Lüfter­ haube 4 umgebener Maschinenlüfter 5 auf der Maschinenwelle angeordnet. Die Lüfterhaube 4 ist in entsprechender Weise am Maschinengehäuse 2 befestigt. 1 designates an electrical machine in which a terminal box 3 is arranged on the top of its machine housing 2 . In this terminal box 3 is a power electronics, for. B. installed a frequency converter for speed control of the machine 1 . On the drive side of the machine 1 facing away from a fan hood 4 surrounded by a machine fan 5 is arranged on the machine shaft. The fan shroud 4 is fixed in a corresponding manner on the machine housing. 2

An der Lüfterhaube 4 ist eine nach radial außen weisende Aus­ buchtung 6 angeformt, die in ihrer radialen Höhe 7 und in ih­ rer umfangsmäßigen Erstreckung 8 der Höhe und Breite des Klemmenkastens 3 angepaßt ist. Im Bereich der Ausbuchtung 6 weist die Lüfterhaube 4 eine Durchbrechung 9 auf, durch die ein Teil des vom Maschinenlüfter 5 erzeugten Kühlluftstromes in die Ausbuchtung 6 strömen kann. Durch die zu dem Klemmenkasten 3 hin offene Seite der Ausbuchtung 6 strömt diese abgezweigte Kühlluft dann zum Klemmenkasten 3.On the fan cover 4 from a radially outward bulge 6 is formed, which is adapted in its radial height 7 and in its circumferential extent 8 of the height and width of the terminal box 3 . In the region of the bulge 6 , the fan hood 4 has an opening 9 through which part of the cooling air flow generated by the machine fan 5 can flow into the bulge 6 . This branched-off cooling air then flows to the terminal box 3 through the side of the bulge 6 that is open toward the terminal box 3 .

Die Ausbuchtung 6 kann mit ihren Seitenwänden 10 gegebenen­ falls den Klemmenkasten 3 in axialer Richtung etwas übergrei­ fen. Hierdurch wird der durch Pfeile 12 angedeutete Teilluft­ strom sicher zu den drei freien Seiten 11 des Klemmenkastens 3 gelenkt und strömt an diesen Seiten 11 entlang. Diese Sei­ ten 11 können zusätzlich mit Kühlrippen versehen sein.The bulge 6 can feng with its side walls 10 given if the terminal box 3 in the axial direction somewhat. As a result, the partial air flow indicated by arrows 12 is directed safely to the three free sides 11 of the terminal box 3 and flows along these sides 11 . These Be 11 can also be provided with cooling fins.

Durch ein solch gezieltes Anblasen des Klemmenkastens 3 wird eine intensive Kühlung desselben und damit auch eine verbes­ serte Kühlung der eingebauten Leistungselektronik erreicht.By such a targeted blowing on the terminal box 3 , an intensive cooling of the same and thus an improved cooling of the built-in power electronics is achieved.

Claims (4)

1. Elektrische Maschine mit einem in deren am Maschinenge­ häuse (2) angeordneten und zumindest durch einen Teilluft­ strom (12) des vom Maschinenlüfter (5) erzeugten Kühlluft­ stromes bestrichenen Klemmenkasten (3) eingebauten Leistung­ selektronik, deren Verlustwärme über die Oberfläche des Klem­ menkastens (3) abgeführt ist, dadurch ge­ kennzeichnet, daß der Teilluftstrom (12) mittels eines Abzweigkanales (6) vom Kühlluftstrom abgezweigt und gezielt auf den Klemmenkasten (3) gelenkt ist.1. Electrical machine with a housing in the machine housing ( 2 ) arranged and at least by a partial air flow ( 12 ) of the machine air ( 5 ) generated cooling air flow smeared terminal box ( 3 ) built-in power electronics, the heat loss over the surface of the terminal box ( 3 ) is discharged, characterized in that the partial air flow ( 12 ) is branched off from the cooling air flow by means of a branch duct ( 6 ) and is directed specifically onto the terminal box ( 3 ). 2. Elektrische Maschine nach Anspruch 1, dadurch gekennzeichnet, daß der Abzweigkanal (6) am Umfang der den Maschinenlüfter (5) umgebenden Lüfterhaube (4) vorgesehen ist.2. Electrical machine according to claim 1, characterized in that the branch duct ( 6 ) on the circumference of the machine fan ( 5 ) surrounding the fan cover ( 4 ) is provided. 3. Elektrische Maschine nach Anspruch 2, dadurch gekennzeichnet, daß am Umfang der Lüfter­ haube (4) eine nach radial außen ragende, axial vor dem Klem­ menkasten (3) liegende, kappenartige Ausbuchtung (6) vorgese­ hen ist, die zur betreffenden Stirnseite des Klemmenkastens (3) hin offen ist.3. Electrical machine according to claim 2, characterized in that on the circumference of the fan hood ( 4 ) a radially projecting, axially in front of the terminal box ( 3 ) lying, cap-like bulge ( 6 ) is vorgese hen to the relevant end face of the Terminal box ( 3 ) is open. 4. Elektrische Maschine nach Anspruch 3, dadurch gekennzeichnet, daß die Ausbuchtung (6) in ihrer radialen Höhe (7) und umfangsmäßigen Erstreckung (8) der Höhe und Breite des Klemmenkastens (3) angepaßt ist.4. Electrical machine according to claim 3, characterized in that the bulge ( 6 ) in its radial height ( 7 ) and circumferential extent ( 8 ) of the height and width of the terminal box ( 3 ) is adapted.
DE19618996A 1996-05-10 1996-05-10 Electrical machine with power electronics in connection box Withdrawn DE19618996A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19618996A DE19618996A1 (en) 1996-05-10 1996-05-10 Electrical machine with power electronics in connection box
DE29708355U DE29708355U1 (en) 1996-05-10 1997-05-09 Electrical machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19618996A DE19618996A1 (en) 1996-05-10 1996-05-10 Electrical machine with power electronics in connection box

Publications (1)

Publication Number Publication Date
DE19618996A1 true DE19618996A1 (en) 1997-11-13

Family

ID=7794018

Family Applications (2)

Application Number Title Priority Date Filing Date
DE19618996A Withdrawn DE19618996A1 (en) 1996-05-10 1996-05-10 Electrical machine with power electronics in connection box
DE29708355U Expired - Lifetime DE29708355U1 (en) 1996-05-10 1997-05-09 Electrical machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE29708355U Expired - Lifetime DE29708355U1 (en) 1996-05-10 1997-05-09 Electrical machine

Country Status (1)

Country Link
DE (2) DE19618996A1 (en)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033696A1 (en) * 1999-11-03 2001-05-10 Peter John King Universal electric motor cowl
DE102005032968A1 (en) * 2005-07-14 2007-02-08 Siemens Ag Frequency converter motor for drive application, has frequency converter that is radially arranged on motor, where side of housing of frequency converter facing motor is U-shapely designed and has different high cooling fins
ITMI20100446A1 (en) * 2010-03-18 2011-09-19 Abb Spa ELECTRIC MACHINE
WO2011151106A2 (en) 2010-06-02 2011-12-08 Ssb Wind Systems Gmbh & Co. Kg Electric drive assembly
DE102013203068A1 (en) * 2013-02-25 2014-08-28 Siemens Aktiengesellschaft Electric machine e.g. motor, has cooling device actively generating cooling stream in housing for refrigeration of transducer, where portion of cooling stream is guided from housing into terminal box
US8854807B2 (en) 2011-08-09 2014-10-07 Siemens Aktiengesellschaft Converter arrangement with an air cooling system
WO2016054703A1 (en) * 2014-10-09 2016-04-14 Weg Equipamentos Eléctricos S.A. - Motores Arrangement for casing of odp type motors with part of the casing being closed by the connection box
DE102014117962A1 (en) 2014-12-05 2016-06-09 Thyssenkrupp Presta Teccenter Ag Electric drive system with improved cooling
CN107359725A (en) * 2017-08-17 2017-11-17 安徽皖南电机股份有限公司 Fan shroud
WO2018156253A1 (en) * 2017-02-22 2018-08-30 Flowserve Management Company Coanda effect bearing cooler
CN108900036A (en) * 2018-08-08 2018-11-27 江阴航源航空科技有限公司 A kind of unmanned plane electric machine radiator
US11139722B2 (en) 2018-03-02 2021-10-05 Black & Decker Inc. Motor having an external heat sink for a power tool
US11451156B2 (en) 2020-01-21 2022-09-20 Itt Manufacturing Enterprises Llc Overvoltage clamp for a matrix converter
US11489418B2 (en) 2016-03-11 2022-11-01 Itt Manufacturing Enterprises Llc Motor drive unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011108221A1 (en) * 2011-07-21 2013-01-24 Hyco-Vakuumtechnik Gmbh Electric motor for suction/pressure-pump of sterilizer utilized to e.g. sterilize surgical instrument, has cooling fins, where one of fins has projection extending to other fin and partially closing aperture of cool air channel
ITUA20163927A1 (en) * 2016-05-30 2017-11-30 Magneti Marelli Spa TANGENTIAL ARCHITECTURAL ELECTRIC MACHINE WITH IMPROVED AIR COOLING

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947402C (en) * 1953-12-21 1956-08-16 Bendix Aviat Corp Process for cooling a dynamo machine and its associated control and regulating apparatus
DE3642724A1 (en) * 1986-12-13 1988-06-23 Grundfos Int ELECTRIC MOTOR WITH A FREQUENCY CONVERTER TO CONTROL THE MOTOR OPERATING SIZES

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE947402C (en) * 1953-12-21 1956-08-16 Bendix Aviat Corp Process for cooling a dynamo machine and its associated control and regulating apparatus
DE3642724A1 (en) * 1986-12-13 1988-06-23 Grundfos Int ELECTRIC MOTOR WITH A FREQUENCY CONVERTER TO CONTROL THE MOTOR OPERATING SIZES

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001033696A1 (en) * 1999-11-03 2001-05-10 Peter John King Universal electric motor cowl
DE102005032968A1 (en) * 2005-07-14 2007-02-08 Siemens Ag Frequency converter motor for drive application, has frequency converter that is radially arranged on motor, where side of housing of frequency converter facing motor is U-shapely designed and has different high cooling fins
ITMI20100446A1 (en) * 2010-03-18 2011-09-19 Abb Spa ELECTRIC MACHINE
US8860265B2 (en) 2010-03-18 2014-10-14 Abb S.P.A. Electrical motor apparatus having improved cooling system
WO2011151106A2 (en) 2010-06-02 2011-12-08 Ssb Wind Systems Gmbh & Co. Kg Electric drive assembly
DE102010017222A1 (en) 2010-06-02 2011-12-08 Ssb Wind Systems Gmbh & Co. Kg Electric drive arrangement
DE202010018108U1 (en) 2010-06-02 2014-05-06 Ssb Wind Systems Gmbh & Co. Kg Electric drive arrangement
US8854807B2 (en) 2011-08-09 2014-10-07 Siemens Aktiengesellschaft Converter arrangement with an air cooling system
DE102013203068B4 (en) 2013-02-25 2022-05-05 Flender Gmbh Electric machine with cooled junction box and cooling method
DE102013203068A1 (en) * 2013-02-25 2014-08-28 Siemens Aktiengesellschaft Electric machine e.g. motor, has cooling device actively generating cooling stream in housing for refrigeration of transducer, where portion of cooling stream is guided from housing into terminal box
WO2016054703A1 (en) * 2014-10-09 2016-04-14 Weg Equipamentos Eléctricos S.A. - Motores Arrangement for casing of odp type motors with part of the casing being closed by the connection box
DE102014117962A1 (en) 2014-12-05 2016-06-09 Thyssenkrupp Presta Teccenter Ag Electric drive system with improved cooling
US11489418B2 (en) 2016-03-11 2022-11-01 Itt Manufacturing Enterprises Llc Motor drive unit
US11777380B2 (en) 2016-03-11 2023-10-03 Itt Manufacturing Enterprises Llc Motor drive unit
US11777379B2 (en) 2016-03-11 2023-10-03 Itt Manufacturing Enterprises Llc Motor drive unit
US11824406B2 (en) 2016-03-11 2023-11-21 Itt Manufacturing Enterprises Llc Motor drive unit
US11855495B2 (en) 2016-03-11 2023-12-26 Itt Manufacturing Enterprises Llc Motor drive unit
US11111961B2 (en) 2017-02-22 2021-09-07 Flowserve Management Company Coanda effect bearing cooler
WO2018156253A1 (en) * 2017-02-22 2018-08-30 Flowserve Management Company Coanda effect bearing cooler
CN107359725A (en) * 2017-08-17 2017-11-17 安徽皖南电机股份有限公司 Fan shroud
US11139722B2 (en) 2018-03-02 2021-10-05 Black & Decker Inc. Motor having an external heat sink for a power tool
CN108900036A (en) * 2018-08-08 2018-11-27 江阴航源航空科技有限公司 A kind of unmanned plane electric machine radiator
US11451156B2 (en) 2020-01-21 2022-09-20 Itt Manufacturing Enterprises Llc Overvoltage clamp for a matrix converter
US11848619B2 (en) 2020-01-21 2023-12-19 Itt Manufacturing Enterprises Llc Apparatus and methods for supplying DC power to control circuitry of a matrix converter

Also Published As

Publication number Publication date
DE29708355U1 (en) 1997-07-17

Similar Documents

Publication Publication Date Title
DE19618996A1 (en) Electrical machine with power electronics in connection box
DE4243044C2 (en) Inverter-motor combination
EP1703140B1 (en) Cooling device for a electrically driven centrifugal fan
EP1224397B1 (en) Electric ventilator
DE10063619A1 (en) Drive unit for fans in vehicles
DE10244877A1 (en) Motor-fan unit with electric motor and brush holder unit, has pair of brush holders formed on plate part and opening in direction of fan unit
DE102004030814A1 (en) Motor arrangement for an air conditioning system of a vehicle
WO2002033264A1 (en) Fan installation
DE20013029U1 (en) Cooling pad for notebook
DE202016104861U1 (en) Heat dissipation structure of an engine
DE202016106151U1 (en) Motor with an improved structure for heat dissipation
DE29615089U1 (en) Brushless DC fan
EP1511156B1 (en) Optimized cooling air guide
DE2744664A1 (en) Dustproof sealed housing for heat generating electric devices - has heat exchanger consisting of part of wall or door, provided with ribs and cover
EP3819212A1 (en) Propulsion unit for an aircraft and method for cooling a propulsion unit
DE3942083A1 (en) Hand-held power tool with enhanced motor cooling - has radial and axial fans juxtaposed and keyed to motor armature shaft in space immediately ahead of downstream stator winding heads
DE202005017666U1 (en) air blower
DE2649181A1 (en) Electric machine ventilating system with fan impeller - has radial fan cowl connected to machine and covering impeller
DE202016106121U1 (en) Motor with improved structure for heat dissipation
DE19606487A1 (en) Fan motor e.g. for cooling electronic components
DE202016103530U1 (en) Heat dissipation structure of an engine
DE202016103653U1 (en) Heat dissipation structure of an engine
DE1126498B (en) Cooling arrangement for closed, surface-cooled electrical machines, especially for the drive of loading winches on ships
DE202016103502U1 (en) Motor with heat dissipation
DE3339310C2 (en)

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee