US2787721A - Dynamoelectric machines - Google Patents

Dynamoelectric machines Download PDF

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Publication number
US2787721A
US2787721A US473587A US47358754A US2787721A US 2787721 A US2787721 A US 2787721A US 473587 A US473587 A US 473587A US 47358754 A US47358754 A US 47358754A US 2787721 A US2787721 A US 2787721A
Authority
US
United States
Prior art keywords
slots
ports
winding
rotor
passages
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.)
Expired - Lifetime
Application number
US473587A
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English (en)
Inventor
Tudge Joseph
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co Ltd
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
Priority claimed from GB1631/54A external-priority patent/GB753359A/en
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Application granted granted Critical
Publication of US2787721A publication Critical patent/US2787721A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors

Definitions

  • the present invention is concerned with improving the cooling of the rotor conductors.
  • the coil ends and the embedded portions of the coils are separately and independently ventilated.
  • the conductor passages are blocked at or near the ends of the core so that the conductor passages along the mid-part of the core are supplied with gas wholly from the sub-slots.
  • the individual conductors may conveniently each be formed of a pair of superimposed straps, which are channelled or grooved along their contacting faces, so that when placed together they form an internal duct.
  • Figs. 2, 3 and 4 are enlarged cross-sectional views of a coil taken on the lines IIlI, IIIIII, and IVIV, respectively.
  • each conductor comprises an upper strap 5, superimposed on a lower strap 6, the upper straps 5 are grooved along their under surfaces, whilst the lower straps 6 have corresponding grooves in their upper surfaces so that when the two straps are laid together, one over the other, the grooves will register and form longitudinal passages 7. These passages extend throughout the conductors.
  • the external surfaces of the end turns are cooled in the normal manner by air flow over these surfaces whilst the interiors of the conductors are additionally cooled by cooling gas entering through axially extending ports 9 on the side faces of the coils, whilst those parts of the conductors which are located in the core slots are supplied with cooling gas through radial passages 10, fed from sub-slots 11.
  • the gas will enter through the ports 9 and then pass along the longitudinal passages 7 into the core slots, whence it will discharge through the two end radial ports 12, which extend radially outwards to the periphery of the rotor through the wedges 2. Stops 13 extend across the longitudinal passages beyond the radial discharge ports 12, and so prevent the cooling gas from the end turns passing further along the slots.
  • the conductors within the slots are fed with cooling gas through a sub-slot 11, which extends axially below each of the winding slots. Cooling gas enters at each end 14 of a sub-slot and from the sub-slot passes radially outwards, i. e. upwards in the drawing, through the radial ports it), which extend upwardly as far as the uppermost conductor passage, but do not extend as far as the periphery.
  • the ports 10 are uniformly spaced along the rotor and between each pair of ports 10 is a discharge port 15, which extends to the periphery of the rotor in a similar manner to the ports 12 at the end of the rotor.
  • cooling gas from the sub-slots 11 passes up the ports 10, then along the conductor passages and finally discharges through the ports 15.
  • ports 10 and also the ports 15 may be graded to give a desired distribution of gas flow.
  • the stops 13 may conveniently corn-prise insulating blocks extending across the passageway or, alternatively, they may be of conducting material and may, for example, be formed of the actual material of the conductors, by omitting a short length of channelling.
  • longitudinal passages are formed internally of the conductors, clearly other arrangements could be employed, for instance, longitudinal channels could be formed in the external face or faces of the conductors and could be closed by insulation over the top of the channel.
  • a dynamo-electric machine having a stator and a rotor having a core provided with winding slots, a winding having portions embedded in slots in the rotor core and exposed end turns and comprising conductors having longitudinal passages form-ed therein, means formed in the exposed end turns of the winding and defining axially extending inlet ports leading to said longitudinal conductor passages, means defining radially extending outlet ports situated within and close to the ends of the rotor core and providing discharge means for said conductor passages in the end turns of the winding to the rotor periphery, walls defining axially extending sub-slots in the rotor core beneath the winding slots therein, means for feeding cooling gas to said sub-slots at each end of the rotor core, means defining radially extending ports between said subslots and said longitudinal conductor passages, and means defining ports between the conductor passages in the embedded portions of the winding and the rotor periphery.
  • a dynamo-electric machine having a stator and a rotor having a slotted core, a winding having portions embedded in slots in the rotor core and exposed end turns and comprising conductors having longitudinal passages formed therein, a cooling circuit for the exposed end turns of the winding including means defining axially extending inlet ports to said conductor passages formed in the exposed end turns and means defining radially extending outlet ports situated within and close to the ends of the rotor core and discharging to the rotor periphery, together with a cooling circuit for the embedded portions of said winding comprising walls defining axially extending subslots in the rotor core beneath the winding slots, means for feeding said sub-slots with cooling gas at each end of the rotor core, means defining radially extending ports between said sub-slots and said longitudinal conductor passages, said radially extending ports being graded in cross-section to give a desired distribution in gas flow, means defining discharge ports between the longitudinal conductor

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Windings For Motors And Generators (AREA)
  • Motor Or Generator Cooling System (AREA)
US473587A 1954-01-19 1954-12-07 Dynamoelectric machines Expired - Lifetime US2787721A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB1036370X 1954-01-19
GB1631/54A GB753359A (en) 1954-01-19 1954-01-19 Improvements relating to dynamo-electric machines
GB2787721X 1954-01-19

Publications (1)

Publication Number Publication Date
US2787721A true US2787721A (en) 1957-04-02

Family

ID=27253922

Family Applications (1)

Application Number Title Priority Date Filing Date
US473587A Expired - Lifetime US2787721A (en) 1954-01-19 1954-12-07 Dynamoelectric machines

Country Status (2)

Country Link
US (1) US2787721A (fr)
BE (1) BE534929A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439203A (en) * 1965-08-31 1969-04-15 Tokyo Shibaura Electric Co Rotor of an electrical rotary machine
US4633116A (en) * 1985-10-31 1986-12-30 General Electric Company Sub-slot cover for dynamoelectric machine
US4709177A (en) * 1986-06-30 1987-11-24 General Electric Company Ventilated end turns for rotor windings of a dynamoelectric machine
US4709181A (en) * 1987-02-26 1987-11-24 General Electric Company Subslot cover for dynamoelectric machine
WO1997039513A1 (fr) * 1996-04-17 1997-10-23 Siemens Aktiengesellschaft Enroulement de rotor pour machine electrique
US6252318B1 (en) 2000-02-09 2001-06-26 General Electric Co. Direct gas cooled longitudinal/cross-flow rotor endwinding ventillation scheme for rotating machines with concentric coil rotors
US6339268B1 (en) 2000-02-02 2002-01-15 General Electric Company Cooling ventilation circuit for rotor end winding and slot end region cooling
US20040201293A1 (en) * 2003-03-07 2004-10-14 Alstom Technology Ltd Multi-path cooling of a turbo-generator rotor winding
US20070120429A1 (en) * 2005-11-29 2007-05-31 Howard Darren C Dynamo Electric Machine
US20090127944A1 (en) * 2006-02-17 2009-05-21 Vincenzo Tartaglione Ventilated rotor of a high-power turbogenerator for the production of electricity
US10326335B2 (en) * 2016-10-20 2019-06-18 General Electric Technology Gmbh Radial counter flow jet cooling system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1160937B (de) * 1959-06-29 1964-01-09 Ass Elect Ind Rotor fuer dynamoelektrische Maschinen, insbesondere fuer Turbogeneratoren, mit einer Wicklung aus Laengskuehlkanaele aufweisenden Leitern
DE1153826B (de) * 1959-10-19 1963-09-05 Zd Y V I Plzen Narodni Podnik Kuehlanordnung fuer die Wicklung von Laeufern elektrischer Maschinen, vorzugsweise von Turbogeneratoren
BR8503683A (pt) * 1984-08-27 1986-05-06 Bbc Brown Boveri & Cie Rotor de uma maquina eletrica
DE19514592A1 (de) * 1995-04-20 1996-10-24 Abb Patent Gmbh Elektrische Maschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR714319A (fr) * 1930-07-12 1931-11-12 Alsthom Cgee Procédé de refroidissement pour enroulements de machines électriques
US2653255A (en) * 1952-07-26 1953-09-22 Westinghouse Electric Corp Separate end-turn rotorventilation
US2664512A (en) * 1952-08-30 1953-12-29 Gen Electric Dynamoelectric machine core and winding ventilation arrangement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR714319A (fr) * 1930-07-12 1931-11-12 Alsthom Cgee Procédé de refroidissement pour enroulements de machines électriques
US2653255A (en) * 1952-07-26 1953-09-22 Westinghouse Electric Corp Separate end-turn rotorventilation
US2664512A (en) * 1952-08-30 1953-12-29 Gen Electric Dynamoelectric machine core and winding ventilation arrangement

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3439203A (en) * 1965-08-31 1969-04-15 Tokyo Shibaura Electric Co Rotor of an electrical rotary machine
US4633116A (en) * 1985-10-31 1986-12-30 General Electric Company Sub-slot cover for dynamoelectric machine
US4709177A (en) * 1986-06-30 1987-11-24 General Electric Company Ventilated end turns for rotor windings of a dynamoelectric machine
US4709181A (en) * 1987-02-26 1987-11-24 General Electric Company Subslot cover for dynamoelectric machine
WO1997039513A1 (fr) * 1996-04-17 1997-10-23 Siemens Aktiengesellschaft Enroulement de rotor pour machine electrique
US6339268B1 (en) 2000-02-02 2002-01-15 General Electric Company Cooling ventilation circuit for rotor end winding and slot end region cooling
US6252318B1 (en) 2000-02-09 2001-06-26 General Electric Co. Direct gas cooled longitudinal/cross-flow rotor endwinding ventillation scheme for rotating machines with concentric coil rotors
US20040201293A1 (en) * 2003-03-07 2004-10-14 Alstom Technology Ltd Multi-path cooling of a turbo-generator rotor winding
US7190094B2 (en) 2003-03-07 2007-03-13 Alsom Technology Ltd. Multi-path cooling of a turbo-generator rotor winding
US20070120429A1 (en) * 2005-11-29 2007-05-31 Howard Darren C Dynamo Electric Machine
US7598635B2 (en) * 2005-11-29 2009-10-06 Goodrich Control Systems Limited Dynamo electric machine
US20090127944A1 (en) * 2006-02-17 2009-05-21 Vincenzo Tartaglione Ventilated rotor of a high-power turbogenerator for the production of electricity
US8040002B2 (en) * 2006-02-17 2011-10-18 Ansaldo Energia S.P.A. Ventilated rotor of high-power turbogenerator for production of electricity
US10326335B2 (en) * 2016-10-20 2019-06-18 General Electric Technology Gmbh Radial counter flow jet cooling system
US11349373B2 (en) 2016-10-20 2022-05-31 General Electric Technology Gmbh Radial counter flow jet cooling system

Also Published As

Publication number Publication date
BE534929A (fr)

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