GB1584811A – Ring collector for electrical machines and a method of making the said collector
– Google Patents
GB1584811A – Ring collector for electrical machines and a method of making the said collector
– Google Patents
Ring collector for electrical machines and a method of making the said collector
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Publication number
GB1584811A
GB1584811A
GB23318/77A
GB2331877A
GB1584811A
GB 1584811 A
GB1584811 A
GB 1584811A
GB 23318/77 A
GB23318/77 A
GB 23318/77A
GB 2331877 A
GB2331877 A
GB 2331877A
GB 1584811 A
GB1584811 A
GB 1584811A
Authority
GB
United Kingdom
Prior art keywords
collector
core
coating
ring
areas
Prior art date
1976-06-18
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
GB23318/77A
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.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
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.)
1976-06-18
Filing date
1977-06-02
Publication date
1981-02-18
1977-06-02
Application filed by Ducellier et Cie
filed
Critical
Ducellier et Cie
1981-02-18
Publication of GB1584811A
publication
Critical
patent/GB1584811A/en
Status
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
H01R39/00—Rotary current collectors, distributors or interrupters
H01R39/02—Details for dynamo electric machines
H01R39/34—Connections of conductor to slip-ring
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
H01R43/10—Manufacture of slip-rings
Description
(54) A RING COLLECTOR FOR ELECTRICAL MACHINES AND A METhOD OF
MAKING THE SAID COLLECTOR
(71) We, DUCELLIER & CIE, a French
Company, of Echat 950, 94024 Creteil
Cedex, France, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
The present invention relates to a ring collector for an electrical machine of the type having at least two axially spaced collector rings disposed on a cylinderical core of insulating material and means for supplying electric current to the rings.
In such collectors, the current supplying means are generally constituted by two conductive tongues disposed respectively on the internal surfaces of the rings, and partially housed in longitudinal grooves formed in the periphery of the core, the free ends of the rings projecting from the grooves and being bent so as to extend radially outwardly with respect to the axis of the collector.
This technique necessitates many machining and assembly operations. It is necessary to shape and cut out the tongues and to weld them to the inside of the rings. In addition, longitundinal grooves have to be formed in the the periphery of the core to partially house the tongues.
These operations are lengthy and costly and an object of the present invention is to provide a method of making the ring collector in which such operations are eliminated.
According to the invention, a method of making a ring collector for an electrical machine comprises the steps of forming a deposit of an electrically conductive material on an electrically insulating core having a cylindrical outer surface portion such that the deposit forms a continuous electrically conductive coating over all surfaces of the core, and dividing the coating into at least two mutually insulated areas by removing the deposit from at least one region of the core, said region or at least one of the regions extending circumferentially around said cylindrical outer surface portion so that the coating on said portion is divided into two axially separated parts.
If the coating is sufficiently thick, the axially separated parts thereof can serve the purpose of slip rings. Alternatively, however, a pair of electrically conductive rings can be mounted on the cylindrical outer surface portion so that they are in electrical contact with respective ones of said axially separated parts of the coating.
Preferably, the deposit is removed from said at least one region by machining. In this case, the machining operation advantageously includes the step of machining an annular circumferential groove in said cylindrical outer surface portion of the core.
Desirably, the core includes an annular flange at one end thereof having a plurality of bores therein, the internal surface of each bore being coated by the electrically conductive material which forms part of a respective one of said areas of the coating.
From another aspect of the invention, a ring collector made by the above method comprises an electrically insulating core having a cylindrical outer surface portion, at least two collector rings mounted in axially spaced relation on said cylindrical outer surface portion, and means for supplying current to the collector rings including an electrically conductive coating on the core, the coating being divided into at least two mutually insulated areas by at least one region extending circumferentially around said cylindrical outer surface portion, each collecting ring being electrically connected to a respective one of said areas.
The invention will now be described, by way of example, with reference to the accompanying drawing which is an exploded view in cross-section of the contituent elements of the ring collector of the invention.
The ring collector shown in the drawing includes an insulating ring 1, a cylindrical core 2, and two rings 3 and 4. The cylindrical opening 5 therethrough and is pre ferably made by moulding from an insulating material. The opening 5 terminates in a coaxial recess 6 of larger diameter formed in the front face of a flange 7. Holes 11 and 12 are formed at diametrically opposed locations through the flange 7. The holes 11 and 12 are intended to allow the passage of two conductors with a view to ensuring the electrical connection of the collector with the winding of a rotor of an electrical machine. The cylindrical core 1 thus constituted then undergoes an electrolytic operation with the object of coating all its internal and external surfaces with a conductive deposit, such as copper. The cylindrical core 2 is then partially machined so as to circumferentially remove the copper coated portions A-B-C-D, in order to make two separate electrical circuits 8 and 9, insulated from one another and on which are set the two rings 3 and 4 by the known process called «Magneform».
The cylindrical core is force fitted onto a rotating shaft of the machine rotor (not shown) by means of the insulating ring 1 which. as seen in the right hand portion of the drawing is adapted to engage in the cylindrical housing 5 of the core 2 and provided with a flange 10 which fits into the coaxial recess 6 of corresponding shape.
The purpose of the insulating ring 1 is to electrically insulate the circuit 9 from the shaft of the machine, but it is clear that it could be dispensed with and the shaft proper insulated by any other means.
Moreover the rings 3 and 4 may be omitted and contact made directly with the circuits 8 and 9, providing the latter have a deposit of copper of adequate thickness calculated as a function of their wear in the course of time.
WHAT WE CLAIM IS:- 1. A method of making a ring collector for an electrical machine, comprising forming a deposit of an electrically conductive material on an electrically insulating core having a cylindrical outer surface portion such that the deposit forms a continuous electrically conductive coating over all surfaces of the core, and dividing the coating ‘into at least two mutually insulated areas by removing the deposit from at least one region of the core, said region or at least one of the regions extending circumferentially around said cylindrical outer surface portion so that the coating on said portion is divided into two axially separated parts.
2. A method as claimed in claim 1, further comprising mounting a pair of electrically conductive rings on said cylindrical outer surface portion so that they are in electrical contact with respective ones of said areas into which the coating is divided.
3. A method as claimed in claim 1 or 2, wherein the deposit is removed from said at least one region by machining.
4. A method as claimed in claim 3, wherein the machining operation includes the step of machining an annular circumferential groove in said cylindrical outer surface portion of the core.
5. A method as claimed in any preceding claim, wherein the core includes an annular flange at one end thereof having a plurality of bores therein, the internal surface of each bore being coated by the electrically conductive material which forms part of a respective one of said areas of the coating.
6. A method of making a ring collector for an electrical machine, substantially as hereinbefore described with reference to the accompanying drawings.
7. A ring collector for an electrical machine, the ring collector being made by a method as claimed in claim 1 and comprising an electrically insulating core having a cylindrical outer surfaces portion, at least two collector rings mounted in axially spaced relation on said cylindrical outer surface portion, and means for supplying current to the collector rings including an electrically conductive coating on the core, the coating being divided into at least two mutually insulated areas by at least one region extending circumferentially around said cylindrical outer surface portion, each collecting ring being electrically connected to a respective one of said areas.
8. A ring collector as claimed in claim 7, wherein the collector rings are formed by separate electrically conductive members in electrical contact with the respective areas of the coating.
9. A ring collector as claimed in claim 7, wherein the collector rings are formed by parts of the areas of the coating respectively.
10. A ring collector as claimed in claim 7, 8 or 9, wherein the or each said region is formed by an annular circumferential groove in said cylindrical outer surface portion of the core.
11. A ring collector as claimed in any one of claims 7 to 10, wherein the core includes an annular flange at one end thereof having a plurality of bores therein, the internal surface of each bore having an electrically conductive coating thereon which forms part of a respective one of said areas.
12. A ring collector for an electrical machine, substantially as hereinbefore described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (12)
**WARNING** start of CLMS field may overlap end of DESC **. ferably made by moulding from an insulating material. The opening 5 terminates in a coaxial recess 6 of larger diameter formed in the front face of a flange 7. Holes 11 and 12 are formed at diametrically opposed locations through the flange 7. The holes 11 and 12 are intended to allow the passage of two conductors with a view to ensuring the electrical connection of the collector with the winding of a rotor of an electrical machine. The cylindrical core 1 thus constituted then undergoes an electrolytic operation with the object of coating all its internal and external surfaces with a conductive deposit, such as copper. The cylindrical core 2 is then partially machined so as to circumferentially remove the copper coated portions A-B-C-D, in order to make two separate electrical circuits 8 and 9, insulated from one another and on which are set the two rings 3 and 4 by the known process called «Magneform». The cylindrical core is force fitted onto a rotating shaft of the machine rotor (not shown) by means of the insulating ring 1 which. as seen in the right hand portion of the drawing is adapted to engage in the cylindrical housing 5 of the core 2 and provided with a flange 10 which fits into the coaxial recess 6 of corresponding shape. The purpose of the insulating ring 1 is to electrically insulate the circuit 9 from the shaft of the machine, but it is clear that it could be dispensed with and the shaft proper insulated by any other means. Moreover the rings 3 and 4 may be omitted and contact made directly with the circuits 8 and 9, providing the latter have a deposit of copper of adequate thickness calculated as a function of their wear in the course of time. WHAT WE CLAIM IS:-
1. A method of making a ring collector for an electrical machine, comprising forming a deposit of an electrically conductive material on an electrically insulating core having a cylindrical outer surface portion such that the deposit forms a continuous electrically conductive coating over all surfaces of the core, and dividing the coating ‘into at least two mutually insulated areas by removing the deposit from at least one region of the core, said region or at least one of the regions extending circumferentially around said cylindrical outer surface portion so that the coating on said portion is divided into two axially separated parts.
2. A method as claimed in claim 1, further comprising mounting a pair of electrically conductive rings on said cylindrical outer surface portion so that they are in electrical contact with respective ones of said areas into which the coating is divided.
3. A method as claimed in claim 1 or 2, wherein the deposit is removed from said at least one region by machining.
4. A method as claimed in claim 3, wherein the machining operation includes the step of machining an annular circumferential groove in said cylindrical outer surface portion of the core.
5. A method as claimed in any preceding claim, wherein the core includes an annular flange at one end thereof having a plurality of bores therein, the internal surface of each bore being coated by the electrically conductive material which forms part of a respective one of said areas of the coating.
6. A method of making a ring collector for an electrical machine, substantially as hereinbefore described with reference to the accompanying drawings.
7. A ring collector for an electrical machine, the ring collector being made by a method as claimed in claim 1 and comprising an electrically insulating core having a cylindrical outer surfaces portion, at least two collector rings mounted in axially spaced relation on said cylindrical outer surface portion, and means for supplying current to the collector rings including an electrically conductive coating on the core, the coating being divided into at least two mutually insulated areas by at least one region extending circumferentially around said cylindrical outer surface portion, each collecting ring being electrically connected to a respective one of said areas.
8. A ring collector as claimed in claim 7, wherein the collector rings are formed by separate electrically conductive members in electrical contact with the respective areas of the coating.
9. A ring collector as claimed in claim 7, wherein the collector rings are formed by parts of the areas of the coating respectively.
10. A ring collector as claimed in claim 7, 8 or 9, wherein the or each said region is formed by an annular circumferential groove in said cylindrical outer surface portion of the core.
11. A ring collector as claimed in any one of claims 7 to 10, wherein the core includes an annular flange at one end thereof having a plurality of bores therein, the internal surface of each bore having an electrically conductive coating thereon which forms part of a respective one of said areas.
12. A ring collector for an electrical machine, substantially as hereinbefore described with reference to the accompanying drawing.
GB23318/77A
1976-06-18
1977-06-02
Ring collector for electrical machines and a method of making the said collector
Expired
GB1584811A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
FR7618540A
FR2355386A1
(en)
1976-06-18
1976-06-18
BUSHING COLLECTOR FOR ELECTRIC MACHINES AND PROCESS FOR OBTAINING THE SAID MANIFOLD
Publications (1)
Publication Number
Publication Date
GB1584811A
true
GB1584811A
(en)
1981-02-18
Family
ID=9174575
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB23318/77A
Expired
GB1584811A
(en)
1976-06-18
1977-06-02
Ring collector for electrical machines and a method of making the said collector
Country Status (6)
Country
Link
DE
(1)
DE2727216A1
(en)
ES
(1)
ES459902A1
(en)
FR
(1)
FR2355386A1
(en)
GB
(1)
GB1584811A
(en)
IT
(1)
IT1074888B
(en)
RO
(1)
RO73408A
(en)
Families Citing this family (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE19837866A1
(en)
*
1998-08-20
2000-03-02
Siemens Ag
Electrical rotational machine esp. turbo-generator
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2961385A
(en)
*
1958-06-30
1960-11-22
Breeze Corp
Method of forming slip-rings in annular grooves
DE1239392B
(en)
*
1965-02-11
1967-04-27
Teldix Luftfahrt Ausruestung
Slip ring body, consisting of an insulating body, power supply lines and galvanically generated slip rings as well as a process for its production
FR2340636A1
(en)
*
1976-02-09
1977-09-02
Masquelier Denis
Mfr. of armature slip rings – uses injection moulded base with deposited metal surface etched to form contacts
1976
1976-06-18
FR
FR7618540A
patent/FR2355386A1/en
active
Granted
1977
1977-06-02
IT
IT24324/77A
patent/IT1074888B/en
active
1977-06-02
GB
GB23318/77A
patent/GB1584811A/en
not_active
Expired
1977-06-16
DE
DE19772727216
patent/DE2727216A1/en
not_active
Withdrawn
1977-06-17
ES
ES459902A
patent/ES459902A1/en
not_active
Expired
1977-06-18
RO
RO7790752A
patent/RO73408A/en
unknown
Also Published As
Publication number
Publication date
ES459902A1
(en)
1978-11-16
RO73408A
(en)
1981-11-04
FR2355386B1
(en)
1979-07-20
FR2355386A1
(en)
1978-01-13
DE2727216A1
(en)
1977-12-29
IT1074888B
(en)
1985-04-20
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Legal Events
Date
Code
Title
Description
1981-06-17
PS
Patent sealed
1982-07-07
PCNP
Patent ceased through non-payment of renewal fee
1987-05-28
PCNP
Patent ceased through non-payment of renewal fee
