EP0235167B1 - Kommutator für elektrische maschinen - Google Patents

Kommutator für elektrische maschinen Download PDF

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Publication number
EP0235167B1
EP0235167B1 EP86904091A EP86904091A EP0235167B1 EP 0235167 B1 EP0235167 B1 EP 0235167B1 EP 86904091 A EP86904091 A EP 86904091A EP 86904091 A EP86904091 A EP 86904091A EP 0235167 B1 EP0235167 B1 EP 0235167B1
Authority
EP
European Patent Office
Prior art keywords
insulating
segments
webs
slots
collector
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
Application number
EP86904091A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0235167A1 (de
Inventor
Werner Bode
Peter Franz
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0235167A1 publication Critical patent/EP0235167A1/de
Application granted granted Critical
Publication of EP0235167B1 publication Critical patent/EP0235167B1/de
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/32—Connections of conductor to commutator segment

Definitions

  • the invention is based on a commutator for electrical machines according to the preamble of the main claim.
  • Such commutators usually have relatively wide slots between the segments and require connecting lugs on the segments in which the winding ends are securely guided laterally, that is in the circumferential direction of the commutator, and are welded to the segments, for example.
  • the connection lugs for receiving and supporting a winding head bandage are required to increase the spin resistance.
  • Such commutators with slotted connection segments show z.
  • the known commutators can also be manufactured as roller commutators. Roll commutators are much cheaper to manufacture than corresponding extrusion designs.
  • the slots between the segments can also be made narrower here.
  • the segments of which are made from a copper strip with the profile of the segment cross section, however, the connecting lugs cannot be formed long enough in a disadvantageous manner in order to securely fasten the winding ends to them and to take up the end winding.
  • the connecting lugs are therefore attached to the segments as parts which are manufactured by themselves. This also makes the production of roller commutators expensive.
  • the invention has for its object to provide an inexpensive commutator for electrical machines, which is provided with relatively narrow insulating slots between the segments and with long connecting lugs, which do not hinder the safe connection of the winding ends to the segments, and in which the existing material volume Segments for increasing the spin resistance and / or for increasing the heat storage capacity is arranged to an increased extent in the brush track area.
  • the part of the segments forming the connecting lugs for receiving the winding ends consists at least partially of an insulating material, so that the commutator can be inexpensively formed, for example, as a roller commutator or ring-reinforced molded material commutator with narrow slots between the segments and at most short connecting lugs.
  • the widened webs of insulating material take over the functions of the connecting lugs such as taking up the winding ends, fixing the winding ends in the fastening position and during fastening to the segments.
  • the increased spin resistance of the commutator is particularly advantageous because the segments in the connection region of the winding ends have less copper and therefore less the heavier material mass.
  • the widened webs can also perform the support function for the end winding to be applied later.
  • the widened webs made of insulating material are also suitable as extensions of the connecting lugs for extruded commutators with a slot width that can still be produced economically.
  • Phenolic resin, melamine phenol or epoxy molding compositions, which can be reinforced with fibrous materials, for example, are suitable as the insulating material, which can advantageously take on so many functions on the commutator.
  • melamine phenol molding compounds are particularly suitable for extrusion commutators with relatively small anchoring means as additional holding means for the segments.
  • the winding ends can also be securely fastened to the segments in an advantageous manner by welding. Resistance welding, diffusion welding, ultrasonic welding are suitable for this.
  • a commutator 1 - shown as a roller commutator in FIGS. 2 to 3 - has a multiplicity of segments 2, which are provided on their side 4 facing the longitudinal axis 3 of the commutator 1 with anchoring means 5 in the form of claws.
  • the segments 2 have at one end a short collar 7 projecting beyond their running surface 6 radially to the longitudinal axis 3 of the commutator.
  • the collar 7 serves as a connecting lug for associated winding ends 8 of a rotor winding which is known per se and not shown in detail.
  • two superimposed winding ends 8 of round cross-section are attached to each segment 2.
  • the connection side 9 of the federal government 7 is grooved according to the shape of the winding ends 8.
  • connection side 9 the largest possible support for the winding ends 9 is formed on the respective connection side 9.
  • the winding ends can also have an oval or rectangular cross section and can also be arranged next to one another.
  • the connection side 9 is then also designed in accordance with the shape of the winding ends.
  • the commutator 1 can also be modified such that the segments 2 are provided with the connection side 9 at the end of the running surface 6 instead of the collar 7.
  • the segments 2 are formed in the roller commutator from a profile strip made of copper.
  • grooves are formed in the profile strip in a manner known per se and not shown in detail, corresponding to the commutator division provided, which later later separate the segments 2 from one another as segment partial grooves 10.
  • the segments 2 After the formation of the grooves - as is known per se - the segments 2 are still connected by the segment partial grooves 10 bridging narrow webs on the running surface 6, so that the profiled strip can be rolled into a segment ring.
  • the anchoring means 5 can be split off or peeled off in one or more stages from the end faces 11 and 12 in the longitudinal direction of the segments 2 even before or after the rolling.
  • the insulating material is designed as an insulating body 13 in which the segments 2 and a bearing bush 14 are pre-anchored, with which the commutator 1 is mounted on a rotor shaft, which is in turn known and not shown in detail.
  • the insulating material also fills the segment grooves 10 and thus forms the insulating lamellae 15 between the segments 2 together with the collar 7.
  • the webs 16 serve as lateral guidance of the winding ends 8 to be fastened to the segments 2.
  • the insulating body 13 also has the inner edge section of the end faces 11 and 12 comprising flanges 13 and 19 as a support for the segments 2 in the insulating body 13.
  • the flange 19 is also provided with axially projecting and radially extending ribs 20 of triangular cross-section, the center line of which is aligned with that of one of the webs 15.
  • the webs 16 also project axially on the end face 12 of the segments 2.
  • Their edges 21 are chamfered, which facilitates the damage-free insertion of the winding ends 8 into the connecting slots 17.
  • Particularly suitable as insulating material are molding compounds such as phenolic resin, melamine phenol or epoxy molding compounds, which can also be reinforced with fibrous materials.
  • the webs connecting the segments 2 are removed in a manner known per se and not shown in detail.
  • the winding ends 8 placed one above the other in the circumferential direction of the connecting grooves 17 delimited by the webs 16 are mechanically and electrically conductively fastened by welding to the bottom of the connecting grooves 17, which is formed by the connecting side 9 of the respective collar 7 or segment end.
  • the insulating material permits brief heating in the immediate vicinity of the webs 16 during the welding process for the parts 7, 8.
  • the webs 16 made of the selected insulating material still promote the passage of current from a welding electrode placed on the winding ends 8 through the winding ends 8, the collar 7 and segment 2 to a ground electrode placed on segment 2, in which they narrow the passage of current between the electrodes in an almost straight line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
EP86904091A 1985-08-28 1986-07-07 Kommutator für elektrische maschinen Expired EP0235167B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853530652 DE3530652A1 (de) 1985-08-28 1985-08-28 Kommutator fuer elektrische maschinen
DE3530652 1985-08-28

Publications (2)

Publication Number Publication Date
EP0235167A1 EP0235167A1 (de) 1987-09-09
EP0235167B1 true EP0235167B1 (de) 1989-11-15

Family

ID=6279517

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86904091A Expired EP0235167B1 (de) 1985-08-28 1986-07-07 Kommutator für elektrische maschinen

Country Status (6)

Country Link
US (1) US4786835A (ja)
EP (1) EP0235167B1 (ja)
JP (1) JPH0736346B2 (ja)
AU (1) AU583409B2 (ja)
DE (2) DE3530652A1 (ja)
WO (1) WO1987001521A1 (ja)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4638202A (en) * 1985-09-11 1987-01-20 Resinoid Engineering Corporation Commutator and method of making same
JPS63120562U (ja) * 1987-01-28 1988-08-04
GB2217922A (en) * 1988-04-20 1989-11-01 Johnson Electric Ind Mfg Commutator for an electric motor
FR2708397B1 (fr) * 1993-07-26 1995-09-08 Valeo Equip Electr Moteur Induit de machine électrique tournante comportant un collecteur du type tambour.
US5491373A (en) * 1994-09-07 1996-02-13 The Morgan Crucible Company Plc Commutators
FR2731850B1 (fr) * 1995-03-15 1997-04-18 Valeo Equip Electr Moteur Induit de machine electrique tournante muni d'un collecteur perfectionne et demarreur comportant un tel induit
JP3474781B2 (ja) * 1998-08-10 2003-12-08 三菱電機株式会社 回転電機及びその製造方法
JP3636069B2 (ja) * 2000-12-25 2005-04-06 株式会社デンソー 回転電機の電機子
US20050189841A1 (en) * 2002-10-28 2005-09-01 Joze Potocnik Commutator for an electric machine and method for producing same
DE102005030454A1 (de) * 2005-06-28 2007-01-04 Kolektor Group D.O.O. Leiterrohling für einen Trommelkommutator, Verfahren zur Herstellung eines solchen sowie Trommelkommutator

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US550407A (en) * 1895-11-26 Commutator
US1406448A (en) * 1918-12-18 1922-02-14 Dyneto Electric Company Commutator
DE526466C (de) * 1924-12-10 1931-06-06 Siemens Schuckertwerke Akt Ges Stromwender fuer elektrische Maschinen mit hoher Lamellenspannung
DE512733C (de) * 1928-12-07 1930-11-18 Kautt & Bux G M B H Kollektor mit in eine Isoliermasse eingebetteten, durch besondere Isolierlamellen getrennten Kupfersegmenten
US3251120A (en) * 1960-04-30 1966-05-17 Bosch Gmbh Robert Method of making a commutator
DE1157694B (de) * 1961-11-14 1963-11-21 Garbe Lahmeyer & Co Ag Verfahren zur Herstellung von Kollektoren aus Sinterwerkstoff
US3192424A (en) * 1963-05-13 1965-06-29 Gen Electric String band insulation system for commutators
DE2136723A1 (de) * 1970-08-01 1972-02-10 Nippon Denso Co Kommutator
JPS49125801A (ja) * 1973-04-04 1974-12-02
GB1446162A (en) * 1974-03-15 1976-08-18 Ford Motor Co Td Method of making an armature
DE2446204A1 (de) * 1974-09-27 1976-04-08 Kabel Metallwerke Ghh Verfahren zur herstellung von kommutatoren fuer rotierende elektrische maschinen
DE2533295A1 (de) * 1975-07-25 1977-01-27 Licentia Gmbh Kollektor fuer universalmotoren
GB1525972A (en) * 1976-12-02 1978-09-27 Watliff Co Ltd Commutators
FR2412184A1 (fr) * 1977-12-15 1979-07-13 Paris & Du Rhone Perfectionnements aux collecteurs de machines tournantes dynamoelectriques et procede pour leur mise en oeuvre
CS216338B1 (en) * 1980-04-30 1982-10-29 Karel Skrdlant Method of making the front commutators of the d.c.electromotors
FR2482378A1 (fr) * 1980-05-09 1981-11-13 Lorette Manufacture Vilebrequi Rotor avec dispositif de refroidissement notamment du collecteur pour moteurs electriques, son procede et ses moyens de realisation
US4376254A (en) * 1981-06-10 1983-03-08 General Motors Corporation Annular molded article secured to a shaft
US4559464A (en) * 1983-06-27 1985-12-17 General Electric Company Molded commutator and method of manufacture
US4638202A (en) * 1985-09-11 1987-01-20 Resinoid Engineering Corporation Commutator and method of making same

Also Published As

Publication number Publication date
AU583409B2 (en) 1989-04-27
JPS63500689A (ja) 1988-03-10
AU6129886A (en) 1987-03-24
DE3667000D1 (en) 1989-12-21
DE3530652A1 (de) 1987-03-12
US4786835A (en) 1988-11-22
WO1987001521A1 (en) 1987-03-12
EP0235167A1 (de) 1987-09-09
JPH0736346B2 (ja) 1995-04-19

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