US3073980A - Commutator construction - Google Patents

Commutator construction Download PDF

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Publication number
US3073980A
US3073980A US68830A US6883060A US3073980A US 3073980 A US3073980 A US 3073980A US 68830 A US68830 A US 68830A US 6883060 A US6883060 A US 6883060A US 3073980 A US3073980 A US 3073980A
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US
United States
Prior art keywords
commutator
risers
rotor core
annular means
rotor
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
US68830A
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English (en)
Inventor
Dillon B Hoover
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US68830A priority Critical patent/US3073980A/en
Priority to DEW30907A priority patent/DE1160534B/de
Application granted granted Critical
Publication of US3073980A publication Critical patent/US3073980A/en
Priority to JP1964042189U priority patent/JPS434024Y1/ja
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
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H02K13/04—Connections between commutator segments and windings

Definitions

  • NESSES INVENTOR 7 1M ,Qillon B.Hoover "BY 9 4 x 2 22 24 67 w United States Patent "ice
  • the present invention relates to commutator-type rotor members for dynamoelectric machines, and more particu larly to commutators which are used in high speed turbogenerator exciters.
  • the principal object of the present invention is to pro vide an improved commutator construction for a dynamoelectric machine which permits free passage of air around the coil ends.
  • Another object of the present invention is to provide an improved commutator construction for dynamoelectric machines which facilitates cleaning of conducting deposits from between the armature core and the back side of the commutator riser and also from the coil ends.
  • a further object of the present invention is to provide an improved commutator construction for a dynamoelectric machne in which long insulation creepage distance is provided from the commutator bars to grounded parts of the machine.
  • a still further and more specific object of the invention is to provide an improved commutator construction for a dynamoeleetrie machine which utilizes insulating banding between the commutator riser and grounded parts, thereby providing long insulation creepage distance between commutator bars and grounded parts, and which also provides a smooth cylindrical surface which is easy to clean and which permits free flow of ventilation air around the coil ends.
  • FIGURE 1 is a fragmentary longitudinal section of a portion of a dynamoelectric machine illustrating the invention.
  • FIG. 2 is a fragmentary transverse sectional view along the line II-II in FIGURE 1.
  • the invention is shown applied to a dynamoelectric machine 10 having a stator member indicated at 12 and a rotor member 14.
  • the rotor 14 has a core 16 mounted on a shaft 18.
  • a commutator 20 Spaced axially from the front end of the rotor core is a commutator 20 which is illustrated as comprising a plurality of commutator bars 22 and mica bars 24 which are held in place by front shrink rings 26, one of which is shown, and a rear shrink ring 28.
  • Rear shrink ring 28 is centered and supported within an annular centering plate 30 which constitutes annular means for supporting the commutator for rotation with the rotor core.
  • the centering plate 30 is supported on the commutator shell 32 which is a sleeve mounted on the shaft 18, in accordance with the known construction.
  • an end plate 34 for retaining the rotor laminations in position.
  • the end plate 34 has a plurality of axially extending lugs 36 disposed about its circumference.
  • an annular ring 38 Secured to the lugs 36 is an annular ring 38, preferably of insulating material, which constitutes a coil support.
  • the commutator 20 is also provided with aplurality of commutator risers 40 which are centered circumferentially in the bars 22.
  • the commutator risers are set into and suitably and securely fastened within suitable sockets 42 in the respective bars, in accordance with the known construction.
  • the top portions of the risers 40 are electrically connected to the front ends 44 30 of the armature coils or winding.
  • substantially impervious insulating tape or banding 50 is Wound about the commutator bars 22 and a substantial number of layers 51 of the tape 50 are wound to cover the outer surface 52 of the centering plate.
  • the upper layers 51 extend from the rear of the riser bars 40 to a point adjacent the inner edge of the centering plate 30.
  • the insulating banding 50 is preferably glass tape or roving impregnated with a suitable polyester resin, but may be any suitable impervious insulating tape.
  • the banding 50 occupies the volume between the commutator risers and the rear shrink ring 28 as well as covering the center plate 30. This gives extra long insulation creepage distance from the commutator bars to the grounded centering plate 30.
  • the area between the shrink ring 28 and the commutator risers 40 is easy to clean since the surface is accessible and is of a smooth cylindrical shape.
  • the coil ends are left open to permit easy cleaning of the coil ends and free passage of air around the coil ends.
  • Another advantageous feature of this invention is that the commutator assembly including the commutator bars 22, the risers 40, the centering plate 30 and shrink rings 26 and 28 can be assembled together.
  • the banding 50 can be applied to the commutator assembly prior to mounting on the shaft. This simplifies manufacture considerably.
  • a commutator-type dynamoelectric machine having a rotor-core, an armature-winding carried by the rotor core, a commutator spaced axially from the front end of the rotor core, commutator riser bars extending radially outward from the commutator, annular means for supporting said commutator for rotation with said rotor core, and insulating banding wrapped around said commutator and occupying the space intermediate said risers and said annular means to forman uninterrupted, smooth cylindrical surface between the risers and said annular means.
  • a commutator-type dynamoelectric machine having a rotor-core, an armature winding carried by the rotor core, a commutator spaced axially from the front end of V the rotor core, commutator riser bars extending radially outward from the commutator, annular means for supporting said commutator for rotation with said rotor core, and glass polyester banding wrapped around said commutator and occupying the space intermediate said risers and said annular means to form a smooth, uninterrupted surface between the risers and said annular means.
  • a commutator-type dynamoelectric machine having a. rotor-core, an armature winding carried by the rotor core, a commutator spaced axially from the front end of the rotor core, commutator riser bars extending radially outward from the commutator, annular means for supporting said commutator for rotation with safd rotor core, insulating banding wrapped around said commutator and occupying the space intermediate said risers and said annular means, said insulating banding also extending over the outer surface of said annular means to form a smooth, uninterrupted surface between the risers and said annular means.
  • a commutator-type dynamoelectric machine having a rotor-core, an armature winding carried by the rotor core, a commutator spaced axially from the front end of the rotor core, commutator riser bars extending radially outward from the commutator, annular means for supporting said commutator for rotation with said rotor core, glass polyester banding wrapped around said commutator and occupying the space intermediate said risers and said annular means, said banding also extending over the outer surface of said annular means to form a smooth, uninterrupted surface between the risers and said annular means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
US68830A 1960-11-14 1960-11-14 Commutator construction Expired - Lifetime US3073980A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US68830A US3073980A (en) 1960-11-14 1960-11-14 Commutator construction
DEW30907A DE1160534B (de) 1960-11-14 1961-10-19 Kommutator einer elektrischen Maschine
JP1964042189U JPS434024Y1 (enrdf_load_stackoverflow) 1960-11-14 1964-04-10

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US68830A US3073980A (en) 1960-11-14 1960-11-14 Commutator construction

Publications (1)

Publication Number Publication Date
US3073980A true US3073980A (en) 1963-01-15

Family

ID=22084974

Family Applications (1)

Application Number Title Priority Date Filing Date
US68830A Expired - Lifetime US3073980A (en) 1960-11-14 1960-11-14 Commutator construction

Country Status (3)

Country Link
US (1) US3073980A (enrdf_load_stackoverflow)
JP (1) JPS434024Y1 (enrdf_load_stackoverflow)
DE (1) DE1160534B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274413A (en) * 1963-12-04 1966-09-20 Gen Electric Commutator riser construction
US3899705A (en) * 1971-06-03 1975-08-12 Bbc Brown Boveri & Cie Shrink-ring commutator segment assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307516A (en) * 1941-12-17 1943-01-05 Westinghouse Electric & Mfg Co Commutator-centering means
US2896100A (en) * 1957-12-09 1959-07-21 Gen Electric Electrodynamic machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR486872A (fr) * 1916-11-27 1918-05-15 Schneider & Cie Dispositif pour la fixation du collecteur sur l'arbre d'une machine dynamo-électrique
US2550574A (en) * 1950-01-10 1951-04-24 Westinghouse Electric Corp Commutator construction
US2606220A (en) * 1951-03-16 1952-08-05 Gen Electric Dynamoelectric machine commutator
US2989657A (en) * 1956-07-23 1961-06-20 Westinghouse Electric Corp Laminated structure having polyfluoroethylene on one surface thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2307516A (en) * 1941-12-17 1943-01-05 Westinghouse Electric & Mfg Co Commutator-centering means
US2896100A (en) * 1957-12-09 1959-07-21 Gen Electric Electrodynamic machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3274413A (en) * 1963-12-04 1966-09-20 Gen Electric Commutator riser construction
US3899705A (en) * 1971-06-03 1975-08-12 Bbc Brown Boveri & Cie Shrink-ring commutator segment assembly

Also Published As

Publication number Publication date
DE1160534B (de) 1964-01-02
JPS434024Y1 (enrdf_load_stackoverflow) 1968-02-21

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