GB2339084A - A liquid cooled three phase genrator - Google Patents
A liquid cooled three phase genrator Download PDFInfo
- Publication number
- GB2339084A GB2339084A GB9913836A GB9913836A GB2339084A GB 2339084 A GB2339084 A GB 2339084A GB 9913836 A GB9913836 A GB 9913836A GB 9913836 A GB9913836 A GB 9913836A GB 2339084 A GB2339084 A GB 2339084A
- Authority
- GB
- United Kingdom
- Prior art keywords
- casing
- machine according
- generator
- liquid
- phase
- 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.)
- Granted
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
- H02K5/20—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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/22—Arrangements for cooling or ventilating by solid heat conducting material embedded in, or arranged in contact with, the stator or rotor, e.g. heat bridges
- H02K9/227—Heat sinks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Description
2339084 An electrical machine. in particular a liquid-coQled three-phase
generator The "invention takes as its starting-point an electrical machine, in 5 particular a liquid-cooled three-phase generator according to the type specified in the main claim.
The casing of such generators is surrounded, according to DE-PS 43 42 8 70, by a liquid jacket formed by a gap between the casing and another casing which is adjacent thereto and which in part also forms the liquid gap. Critical here, however, are - inter alia - high rotor temperatures, which have a disadvantageous effect on the overall generator concept. Affected 'in particular by such high temperatures are the electronic components, the bearing of the rotor of the generator and the performance characteristics of the generator. It is therefore essential to solve the problem of the dissipation of waste heat satisfactorily in respect of the rotor, in order to prevent excess temperatures near the components. With the aforementioned generator this is problematic, because the dissipation of waste heat is preferably effected via the rear end plate, but the rectifier and the regulator are arranged there, these components likewise generating waste heat.
The electrical machine with the characterising features of the main claim, on the other hand, has the advantage that the lowering of the rotor temperature and hence the avoidance of excess temperature near the components is improved, By this means a distinct increase in the power of the generator is also achieved, in particular by means of a thermal coupling of the rotor in the region of the rear face. At the same time a better distribution of the dissipation of heat is obtained. By means of the special design features specified in the subordinate claims the thermal resistance of the rotor 'in relation to the stator core, the stator frame and the coolant is lowered further.
2 Further advantages of the 'invention will be apparent from the following description and drawing of an embodiment example.
An example of an embodiment of the invention is reproduced in the drawing, which shows a longitudinal section through a claw pole generator.
The generator has a rouglily pot-shaped casing 10 which is sealed on its open side by a cover I I and at the bottom 10A of which a hub 12 is formed which receives a ball bearing 13. In this ball bearing one end 14A of a shaft 14 is supported, the opposite end 14B of which projects out of the casmig 10 and is supported in a stronger ball bearing 16 which is likewise supported in a hub 17 pertaining to the cover 11. The drive side of the generator is also situated here.
A stator 19 is arranged approximately in the middle of the casing 10 on the wall thereof 'in the region of ajoMit 39. Between the stator and the shaft a claw pole rotor system 20 taking the form of a conductive-component rotor is located, consisting of a magnet wheel 21 and a conductive component 22, the claws of which 1S interlock in alternating manner. Below the claws a fixed excitation winding 24 is located, arranged on a pole core 26 which is adjacent to the casing cover 11, is of roughly tubular shape and is secured to the cover 11 by means of screws which are not represented in any detail.
Between the cover I I and a hood 28 which is secured thereon there are located rectifier and regulator components for the generator, which, however, have not been dealt with in any detaiL since they are not essential to the invention and they are conventional with generators of this type.
As mentioned in the introduction, the dissipation of heat is essential for such generators. For this purpose a land-type, revolving cooling rib 30 is formed on the rear face of the generator at the bottom IOA of the casing 10, said cooling rib being situated between the hub 12 and a likewise annular bead 3 1. The bead 3 1 has a recess 34 on the inside, in which a ring land 29 rotates freely which is located on the face of the magnet wheel 2 1. A bulge 3 2 on the casing, which is located on the 3 face externally, serves to receive the rear winding head of a winding 33 of the stator 19. This bulge and also the outer surface of the casing 10 directly border a moderately wide liquid jacket 3 5, to which cooling liquid for cooling the generator is supplied via a channel 36, said cooling liquid being drained away to be cooled via a channel 37. The liquid jacket is bounded on the outside by a machine casing 38 or an outer casing. In this way a thermal coupling of the rotor to the coolant is obtained at the bottom I OA of the casing. By this means, not only is a better distribution of the dissipation of heat obtained, but an effective measure is provided for lowering the temperature of the rotor and increasing the power of the generator. Also affected by this, of course, are the electronic components, which are not represented in any detail, as well as the bearing of the rotor of the generator.
4
Claims (6)
- An electrical machine, in particular a liquid-cooled three-phase 5 generator with a stator (19) arranged in a pot-shaped casing (10) and with a claw-pole rotor system (20) secured to a driven shaft (14), and also with a thermal coupling of the casing (10) to a liquid jacket (35) at least partially surrounding said casing, characterised in that on the outside of the bottom (I OA), located opposite the drive side of the casmig (10), at least one cooling projection (30, 3 1) is formed which has 10 the liquid jacket (3 5) flowing around it.
- 2. Machine according to Claim 1, characterised in that the cooling projeefion (30) takes the form of a revolving ring land.
- 3. Machine according to Claim I and/or 2, characterised in that several revolving ring lands are formed at the bottom (10A) of the casing (10).
- 4. Machine according to one of Claims I to 3, characterised in that on the face of the claw-pole rotor system located opposite the drive side of the machine an 20 axially protruding ring land (29) is formed which rotates in a corresponding recess (3 4) at the bottom (I OA) of the casing.
- 5. Machine according to Claim 4, charactenised in that the recess (34) is surrounded by a bead (3 1) which is directed axiaUy outwards at the bottom (I OA) of 25 the casing.
- 6. An electrical machine substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29811436U DE29811436U1 (en) | 1998-06-26 | 1998-06-26 | Electrical machine, in particular liquid-cooled three-phase generator |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9913836D0 GB9913836D0 (en) | 1999-08-11 |
GB2339084A true GB2339084A (en) | 2000-01-12 |
GB2339084B GB2339084B (en) | 2000-08-09 |
Family
ID=8059079
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9913836A Expired - Fee Related GB2339084B (en) | 1998-06-26 | 1999-06-14 | Liquid-cooled electrical machine |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE29811436U1 (en) |
FR (1) | FR2780576B1 (en) |
GB (1) | GB2339084B (en) |
IT (1) | ITMI991275A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2357192A (en) * | 1999-12-10 | 2001-06-13 | Delphi Tech Inc | Heat transfer between rotor and end cap |
FR2882202A1 (en) * | 2005-02-17 | 2006-08-18 | Renault Sas | Rotating electrical machine e.g. alternator, cooling device for e.g. hybrid vehicle, has conduits that allow exchanging vapor produced by heating liquid between envelope and tank, and transferring condensed liquid toward envelope by gravity |
US12003161B2 (en) | 2018-09-13 | 2024-06-04 | Mahle International Gmbh | Electric machine |
US12009722B2 (en) | 2018-09-13 | 2024-06-11 | Mahle International Gmbh | Electric machine |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4848906A (en) * | 1987-02-02 | 1989-07-18 | Litton Systems, Inc. | Multiplexed fiber optic sensor |
US5313698A (en) * | 1990-06-06 | 1994-05-24 | Robert Bosch Gmbh | Process for the manufacture of the stator of an electrical machine |
FR2773922A1 (en) * | 1998-01-22 | 1999-07-23 | Bosch Gmbh Robert | ELECTRIC MACHINE, PARTICULARLY A THREE-PHASE ALTERNATOR COOLED BY A LIQUID |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62225146A (en) * | 1986-03-25 | 1987-10-03 | Mitsubishi Electric Corp | Ac generator for vehicle |
JP3300200B2 (en) * | 1995-06-20 | 2002-07-08 | 株式会社日立製作所 | Rotating electric machines and electric vehicles |
-
1998
- 1998-06-26 DE DE29811436U patent/DE29811436U1/en not_active Expired - Lifetime
-
1999
- 1999-06-08 IT IT1999MI001275A patent/ITMI991275A1/en unknown
- 1999-06-14 GB GB9913836A patent/GB2339084B/en not_active Expired - Fee Related
- 1999-06-25 FR FR9908138A patent/FR2780576B1/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4848906A (en) * | 1987-02-02 | 1989-07-18 | Litton Systems, Inc. | Multiplexed fiber optic sensor |
US5313698A (en) * | 1990-06-06 | 1994-05-24 | Robert Bosch Gmbh | Process for the manufacture of the stator of an electrical machine |
FR2773922A1 (en) * | 1998-01-22 | 1999-07-23 | Bosch Gmbh Robert | ELECTRIC MACHINE, PARTICULARLY A THREE-PHASE ALTERNATOR COOLED BY A LIQUID |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2357192A (en) * | 1999-12-10 | 2001-06-13 | Delphi Tech Inc | Heat transfer between rotor and end cap |
FR2882202A1 (en) * | 2005-02-17 | 2006-08-18 | Renault Sas | Rotating electrical machine e.g. alternator, cooling device for e.g. hybrid vehicle, has conduits that allow exchanging vapor produced by heating liquid between envelope and tank, and transferring condensed liquid toward envelope by gravity |
US12003161B2 (en) | 2018-09-13 | 2024-06-04 | Mahle International Gmbh | Electric machine |
US12009722B2 (en) | 2018-09-13 | 2024-06-11 | Mahle International Gmbh | Electric machine |
Also Published As
Publication number | Publication date |
---|---|
FR2780576A1 (en) | 1999-12-31 |
DE29811436U1 (en) | 1999-10-28 |
FR2780576B1 (en) | 2003-02-21 |
GB9913836D0 (en) | 1999-08-11 |
ITMI991275A1 (en) | 2000-12-08 |
GB2339084B (en) | 2000-08-09 |
ITMI991275A0 (en) | 1999-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4739204A (en) | Liquid cooled a.c. vehicle generator | |
US10707726B2 (en) | Cooling structure for dynamo-electric machine | |
EP3044857B1 (en) | Electric motor or generator | |
US8110954B2 (en) | Electric rotating machine | |
US3157806A (en) | Synchronous machine with salient poles | |
CN1913295B (en) | Inverter-integrated electrical rotating machine | |
US7629720B2 (en) | Vehicle alternator with improved end cover structure | |
US6072253A (en) | Liquid-cooled electrical machine | |
US2987637A (en) | Dynamoelectric machine | |
GB2217923A (en) | Liquid cooled alternator with direct cooling connections | |
JP2000262013A (en) | Vehicle ac generator | |
JP6560033B2 (en) | Rotating electric machine and rotating electric machine cooling system | |
JPH11262219A (en) | Electrical machine | |
US7619333B2 (en) | Vehicle alternator with improved operation reliability | |
US6979919B2 (en) | Electrical machine having centrally disposed stator | |
JP6964734B1 (en) | Rotating machine | |
JPH11243658A (en) | Liquid-cooled alternator | |
GB2339084A (en) | A liquid cooled three phase genrator | |
JP2003018808A (en) | Alternator for vehicle | |
JP6169216B1 (en) | Rotating electric machine for vehicles | |
JP3016463B2 (en) | Generator | |
JP2003204656A (en) | Alternator for vehicle | |
JP2006271014A (en) | Ac generator for vehicle | |
JP2023554060A (en) | Rotating electric rectifier for separately excited synchronous machine | |
US20190281733A1 (en) | Rotating electric machine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20110614 |