EP2619882A2 - Air-cooled generator - Google Patents
Air-cooled generatorInfo
- Publication number
- EP2619882A2 EP2619882A2 EP11752231.8A EP11752231A EP2619882A2 EP 2619882 A2 EP2619882 A2 EP 2619882A2 EP 11752231 A EP11752231 A EP 11752231A EP 2619882 A2 EP2619882 A2 EP 2619882A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- generator according
- pyramids
- pole
- generator
- 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
- 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
-
- 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
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
Definitions
- the present invention relates to the field of rotary electric machines. It relates to an air-cooled generator according to the preamble of claim 1.
- the surfaces have already been optimized, for example by cooling fins, which increase the active surface area.
- cooling fins which increase the active surface area.
- the direction of the flow of the cooling medium is of great importance. Due to the design but not all cooling surfaces of
- Generators are optimally flown.
- such cooling surfaces are typically located in the region of the pole coils of the rotor.
- Fig. 1 shows in a
- Each of the poles 1 1 has a pole coil 12.
- the individual poles 1 1 are separated in the circumferential direction by pole gaps 14 from each other.
- the basis of the temperature calculation in air-cooled machines is the following physical formula:
- the simplest cooling geometry is a smooth surface. Although this geometry is independent of the direction of flow, it has the minimum possible
- FIGS. 6 and 7 make it clear that, in the case of a faulty flow, the
- Cooling ribs 18 and 21 (flow direction transverse to the cooling fins) can come to areas, namely the recessed spaces 19 and 22, in which the flow rates are very low or recirculations or
- the object is solved by the entirety of the features of claim 1.
- the inventive generator which is flowed through to dissipate heat loss of cooling air, wherein the cooling air sweeps over surfaces acting as cooling surfaces and thereby absorbs heat from these interfaces, characterized in that the interfaces arranged distributed with the cooling surface increasing local elevations are provided.
- Cooling surface are distributed.
- the local surveys can take the form of simple
- the local surveys in the form of cones or truncated cones.
- Another development is characterized in that the local
- Elevations have the shape of cylinders or cuboids. According to a particularly preferred development, the local
- a surface equipped with pyramidal or pyramidal elevations not only promotes the turbulence of the cooling medium passing past, but also prevents or reduces the formation of a thermal boundary layer in the wall region by deflecting flowing cooling medium away from the surface to be cooled, thereby mixing promotes the coolant perpendicular to the flow direction.
- the generator comprises a rotor having a plurality of poles, which are separated from each other by pole gaps and which are each provided with a pole coil, and that provided with the local elevations cooling surfaces in the
- Pole back region are arranged.
- a further embodiment of the invention is characterized in that the generator comprises a rotor with a plurality of poles, which are separated from each other by pole gaps and are each provided with a pole coil, and that provided with the local elevations cooling surfaces in the
- Ventilation of the pole coils are arranged.
- FIG. 1 Show it a perspective view of a section of a generator rotor having a plurality of poles, which are cooled by means of flowing cooling air; the pole gaps of the rotor, which are important for the cooling, according to FIG. 1; the important for the cooling entries for the ventilation of the pole coils; in perspective a section of a generator rotor having a plurality of poles, which are cooled by means of flowing cooling air; the pole gaps of the rotor, which are important for the cooling, according to FIG. 1; the important for the cooling entries for the ventilation of the pole coils; in perspective a section of a generator rotor having a plurality of poles, which are cooled by means of flowing cooling air; the pole gaps of the rotor, which are important for the cooling, according to FIG. 1; the important for the cooling entries for the ventilation of the pole coils; in perspective a section of a generator rotor having a plurality of poles, which are cooled by means of flowing cooling air; the pole gaps of the rot
- Cooling effect should be as independent as possible of the flow conditions.
- the cooling surface is provided with local elevations, which are distributed over the surface so that largely independent of the flow direction of the cooling air flowing above a uniformly high heat transfer between the cooling surface and cooling air.
- Fig. 8 is a detail of a as a perspective view
- pyramid shape is by no means limited to the use of pyramids or stumps with a quadrangular layout.
- pyramidal bodies can be used with triangular or polygonal base. Also, it does not necessarily have to be a regular pyramid, that is, not all the side edges of the
- Pyramid or the pyramid stump be the same length.
- Heat transfer coefficient ⁇ and the increased cooling surface also increases the dissipated heat loss Q at the same cooling surface temperature.
- a significant advantage of the pyramid structure is also due to a further effect.
- a pyramid structure as exemplified in FIG. 8, not only increases the available heat transfer area and the turbulence of the flowing cooling medium, but also promotes the same
- Cooling medium so it contributes to a mixing of the same perpendicular to the flow direction.
- the cooling medium flows against the side surfaces of the pyramidal body (24, 26, 29), it is deflected away from the wall to be cooled. It forms one of the surface to be cooled
- Main flow direction is aligned.
- pole gap regions 15 of the generator 10 for example at one or more pole coil or pole body surfaces, and according to FIG. 3 the rear ventilation of the pole coils 12.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH01526/10A CH703820A1 (en) | 2010-09-21 | 2010-09-21 | AIR-COOLED GENERATOR. |
PCT/EP2011/065323 WO2012038243A2 (en) | 2010-09-21 | 2011-09-05 | Air-cooled generator |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2619882A2 true EP2619882A2 (en) | 2013-07-31 |
Family
ID=43030405
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11752231.8A Ceased EP2619882A2 (en) | 2010-09-21 | 2011-09-05 | Air-cooled generator |
Country Status (6)
Country | Link |
---|---|
US (1) | US20130217317A1 (en) |
EP (1) | EP2619882A2 (en) |
CN (1) | CN103109442B (en) |
CA (1) | CA2811534A1 (en) |
CH (1) | CH703820A1 (en) |
WO (1) | WO2012038243A2 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA2899035A1 (en) * | 2013-02-27 | 2014-09-04 | Magnadrive Corporation | Apparatus, systems and methods for reducing noise generated by rotating couplings |
US20140332194A1 (en) * | 2013-05-07 | 2014-11-13 | Magnadrive Corporation | Apparatus, systems and methods for reducing noise generated by rotating couplings and drives |
US20160056676A1 (en) * | 2014-08-25 | 2016-02-25 | GM Global Technology Operations LLC | Partially segmented wound rotor assembly for high copper fill and method |
DE102015208553A1 (en) * | 2015-05-07 | 2016-11-10 | Wobben Properties Gmbh | Rotor of a gearless wind turbine |
US20170338720A1 (en) * | 2016-04-06 | 2017-11-23 | James Rhett Mayor | Enhanced convective rotor cooling |
CN108574385A (en) * | 2017-03-08 | 2018-09-25 | 赵文忠 | The motor configuration of the length of magnetic path can effectively be changed |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1953110B2 (en) * | 1969-10-17 | 1971-08-19 | ELECTRIC MACHINE WITH AN AIR-COOLED HIGH-POLE RUNNER | |
US3684007A (en) * | 1970-12-29 | 1972-08-15 | Union Carbide Corp | Composite structure for boiling liquids and its formation |
JPS5813837B2 (en) * | 1978-05-15 | 1983-03-16 | 古河電気工業株式会社 | condensing heat transfer tube |
US4621953A (en) * | 1984-12-14 | 1986-11-11 | Foster Wheeler Energy Corporation | Anti-erosion protrusions for wear surfaces in fluid conduits |
US5070937A (en) * | 1991-02-21 | 1991-12-10 | American Standard Inc. | Internally enhanced heat transfer tube |
US5361828A (en) * | 1993-02-17 | 1994-11-08 | General Electric Company | Scaled heat transfer surface with protruding ramp surface turbulators |
DE4333404A1 (en) * | 1993-09-30 | 1995-04-06 | Siemens Ag | Continuous steam generator with vertically arranged evaporator tubes |
CN1084876C (en) * | 1994-08-08 | 2002-05-15 | 运载器有限公司 | Heat transfer tube |
DE19515260A1 (en) | 1995-04-26 | 1996-10-31 | Abb Management Ag | Vertical axis electric hydropower machine |
JP3707250B2 (en) * | 1997-08-06 | 2005-10-19 | 富士電機システムズ株式会社 | Cylindrical rotor of rotating electrical machine |
US6098420A (en) * | 1998-03-31 | 2000-08-08 | Sanyo Electric Co., Ltd. | Absorption chiller and heat exchanger tube used the same |
DE19817333C5 (en) * | 1998-04-18 | 2007-04-26 | Conti Temic Microelectronic Gmbh | Electric drive unit consisting of electric motor and electronic module |
US6182743B1 (en) * | 1998-11-02 | 2001-02-06 | Outokumpu Cooper Franklin Inc. | Polyhedral array heat transfer tube |
JP2002372390A (en) * | 2001-06-12 | 2002-12-26 | Kobe Steel Ltd | Heat exchanger tube for falling film evaporator |
US7311137B2 (en) * | 2002-06-10 | 2007-12-25 | Wolverine Tube, Inc. | Heat transfer tube including enhanced heat transfer surfaces |
WO2005034305A1 (en) * | 2003-10-02 | 2005-04-14 | Amada Company, Limited | Synchronous motor |
DE102007055910A1 (en) * | 2007-10-25 | 2009-04-30 | Baumüller Nürnberg GmbH | Cooling jacket, in particular for electrical machines, and production method therefor |
US8875780B2 (en) * | 2010-01-15 | 2014-11-04 | Rigidized Metals Corporation | Methods of forming enhanced-surface walls for use in apparatae for performing a process, enhanced-surface walls, and apparatae incorporating same |
-
2010
- 2010-09-21 CH CH01526/10A patent/CH703820A1/en not_active Application Discontinuation
-
2011
- 2011-09-05 CN CN201180045514.3A patent/CN103109442B/en not_active Expired - Fee Related
- 2011-09-05 CA CA2811534A patent/CA2811534A1/en not_active Abandoned
- 2011-09-05 WO PCT/EP2011/065323 patent/WO2012038243A2/en active Application Filing
- 2011-09-05 EP EP11752231.8A patent/EP2619882A2/en not_active Ceased
-
2013
- 2013-03-21 US US13/848,194 patent/US20130217317A1/en not_active Abandoned
Non-Patent Citations (2)
Title |
---|
None * |
See also references of WO2012038243A2 * |
Also Published As
Publication number | Publication date |
---|---|
CN103109442A (en) | 2013-05-15 |
US20130217317A1 (en) | 2013-08-22 |
WO2012038243A3 (en) | 2012-11-22 |
CH703820A1 (en) | 2012-03-30 |
CN103109442B (en) | 2015-11-25 |
WO2012038243A2 (en) | 2012-03-29 |
CA2811534A1 (en) | 2012-03-29 |
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Legal Events
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Owner name: ALSTOM RENEWABLE TECHNOLOGIES |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20140219 |
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Owner name: GE RENEWABLE TECHNOLOGIES |
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Effective date: 20190403 |