GB2224165A - Suppression element in a commutator - Google Patents
Suppression element in a commutator Download PDFInfo
- Publication number
- GB2224165A GB2224165A GB8822323A GB8822323A GB2224165A GB 2224165 A GB2224165 A GB 2224165A GB 8822323 A GB8822323 A GB 8822323A GB 8822323 A GB8822323 A GB 8822323A GB 2224165 A GB2224165 A GB 2224165A
- Authority
- GB
- United Kingdom
- Prior art keywords
- base
- commutator
- suppression means
- housings
- electric motor
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/02—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for suppression of electromagnetic interference
- H02K11/028—Suppressors associated with the rotor
-
- 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
- H02K13/06—Resistive connections, e.g. by high-resistance chokes or by transistors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Motor Or Generator Current Collectors (AREA)
Abstract
In an assembled commutator, particularly of the type seen in GB 2128818 and GB 2198892, the commutator segments 2 contact a suppression element, such as a rubber resistor ring 11, as they are mounted on the base. The base may be in two parts 4, 6, the segment being preassembled on a cylindrical part 4 which is then introduced into the housing part 6 bearing the ring 11. <IMAGE>
Description
SUPPRESSION ELEMENT IN A COMMUTATOR The present invention relates to a suppression element in a commutator, particularly assembled commutators of the type described in our published British patent applications, specifications Nos.2128818 and 2198892.
A first aspect of the invention provides an assembled commutator comprising a base and a plurality of commutator segnents mounted on the base, each segment having a brush contacting portion on which a brush of an electric motor may bear, and a terminal portion for connection to an armature winding of a said electric motor, wherein electrical suppression means is mounted on the base, the suppression means being located so that the segments are brought into contact with the element as they are mounted on the base.
A second aspect of the invention provides an assembled commutator comprising a base and a plurality of commutator segments mounted on the base, each segment comprising a brush contacting portion on which a brush of an electric motor may bear, and a terminal portion for connection to an armature winding of a said electric motor, each said terminal portion having a slot therein for straddling and gripping a connector portion of said armature winding, said base comprise a housing part having a plurality of housings for receiving said terminal portions, wherein electrical suppression means is mounted in said housings, said suppression means being positioned in said housings so that said terminal portions make electrical contact with the suppression means as they are inserted in the housings.
The base may be in two separate part: a first part supporting the terminals and a second part supporting the brush contacting portions. The segments may be pre-assembled onto the second part, which is then brought together with the first part.
Preferably the suppression means is resilient and is deformed slightly by the terminal portions.
The suppression means may be a resistor ring, for example of rubber or plastics material.
Other preferred features and advantages of the invention will be apparent from the following description and the accompanying claims.
The single figure of drawings shows a cross-section through an assembled commutator of the type described in published patent specification No.2128818.
In the drawing, a 5-bar commutator comprises a plastics base 1 supporting a plurality of commutator segments 2.
The base 1 comprises a housing part 3 and a second, cylindrical, part 4, which may be separately formed. The segments 2 each comprise a brush contacting portion 5 on the cylindrical part 4 and a terminal 6. Each terminal 6 has a slot 7 which straddles and grips a connector part 8 of an armature winding wire which is wound past a boss 9 in a respective housing 10 which receives the terminal 6.
Positioned in the housing is a rubber resistor ring 11 which extends about the base radially inward of the bosses 9. As the segments 2 are pushed onto the base the terminals 6 enter the housings 10 and contact the ring 11, slightly deforming it to ensure good electrical contact.
The segments 2 are held in place by barbs 12 on the terminals 6 which grip the housing wall and barbs 13 on tongues 14 received in recesses 15 in the opposite end 16 of the base.
The base 1 may, for example, be in two parts, separated along the dotted line 13 , the segments being pre-assembled onto the cylindrical part 4. Also the slots 7 may face out of the housings 10, the wire being drawn into the slots 7. The slots 7 may be arranged to displace insulation on the wire.
Various modifications may be made to the described embodiment and it is desired to include all such modifications as fall within the scope of the accompanying claims.
Claims (6)
1. An assembled commutator comprising a base and a plurality of commutator segments mounted on the base, each segment having a brush contacting portion on which a brush of an electric motor may bear, and a terminal portion for connection to an rature winding of a said electric motor, wherein electrical suppression means is mounted on the base, the suppression means being located so that the segments are brought into contact with the suppression means as they are mounted on the base.
2. An assembled commutator comprising a base and a plurality of commutator segments mounted on the base, each segment comprising a brush contacting portion on which a brush of an electric motor may bear, and a terminal portion for connection to an armature winding of a said electric motor, each said terminal portion having a slot therein for straddling and gripping a connector portion of said armature winding, said base comprising a housing part having a plurality of housings for receiving said terminal portions, wherein electricl suppression means is mounted in said housings, said suppression means being positioned in said housings so that said terminal portions make electrical contact with the suppression means as they are inserted in the housings.
3. A commutator as claimed in claim 1 or 2, wherein the electrical suppress ion means is a resiliently deformable ring.
4. A commutator as claimed in claim 1, 2 or 3, wherein the electrical suppression means is a resistor.
5. A commutator as claimed in any one of claims 1 to 4, wherein the base is in two separate parts.
6. A commutator substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8822323A GB2224165A (en) | 1988-09-22 | 1988-09-22 | Suppression element in a commutator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8822323A GB2224165A (en) | 1988-09-22 | 1988-09-22 | Suppression element in a commutator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8822323D0 GB8822323D0 (en) | 1988-10-26 |
| GB2224165A true GB2224165A (en) | 1990-04-25 |
Family
ID=10644083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8822323A Withdrawn GB2224165A (en) | 1988-09-22 | 1988-09-22 | Suppression element in a commutator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2224165A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0682400A1 (en) * | 1994-05-11 | 1995-11-15 | Johnson Electric S.A. | Noise suppressed commutator |
| EP0714159A3 (en) * | 1994-11-24 | 1997-03-05 | Johnson Electric Sa | A rotor for an electric motor |
| GB2402556A (en) * | 2003-05-28 | 2004-12-08 | Johnson Electric Sa | Commutator including moulded varistor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1337343A (en) * | 1970-11-12 | 1973-11-14 | Conradty Fa C | Electric motor voltage dependent commutators |
| GB2183933A (en) * | 1985-11-15 | 1987-06-10 | Mabuchi Motor Co | Electric motor having a spark-quenched commutator |
-
1988
- 1988-09-22 GB GB8822323A patent/GB2224165A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1337343A (en) * | 1970-11-12 | 1973-11-14 | Conradty Fa C | Electric motor voltage dependent commutators |
| GB2183933A (en) * | 1985-11-15 | 1987-06-10 | Mabuchi Motor Co | Electric motor having a spark-quenched commutator |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0682400A1 (en) * | 1994-05-11 | 1995-11-15 | Johnson Electric S.A. | Noise suppressed commutator |
| US5796203A (en) * | 1994-05-11 | 1998-08-18 | Johnson Electric, S.A. | Noise suppressed commutator |
| CN1047693C (en) * | 1994-05-11 | 1999-12-22 | 德昌电机股份有限公司 | Noise suppressed commutator |
| EP0714159A3 (en) * | 1994-11-24 | 1997-03-05 | Johnson Electric Sa | A rotor for an electric motor |
| EP0863602A1 (en) * | 1994-11-24 | 1998-09-09 | Johnson Electric S.A. | A rotor for an electric motor |
| GB2402556A (en) * | 2003-05-28 | 2004-12-08 | Johnson Electric Sa | Commutator including moulded varistor |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8822323D0 (en) | 1988-10-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3967148A (en) | Brush holder assembly | |
| US4728835A (en) | Electric motors | |
| US4656380A (en) | Commutator with winding connection segments having cutting edges | |
| US5773907A (en) | Brush holder assemblies having novel brush holders | |
| JP2922978B2 (en) | Brush holder for electric motor | |
| KR19990028551A (en) | Brush holder assembly with new brush holder | |
| US3484860A (en) | Electromotor with detachable stator | |
| US5047679A (en) | Casing for a small motor assembly | |
| US4769627A (en) | Armature coil commutator connector | |
| JPH104654A (en) | Commutator brush-holding clip and electric connector of coupled type | |
| US4881000A (en) | Armature for an electric motor | |
| US5216305A (en) | Electric motor with wall support of u-shaped terminals | |
| US5373209A (en) | Assembled commutator | |
| US6617742B2 (en) | Star connected rotor | |
| US5915988A (en) | Contact for electrical motors | |
| AU600023B2 (en) | A commutator | |
| US9929619B2 (en) | End cap assembly for an electric motor | |
| GB2224165A (en) | Suppression element in a commutator | |
| US5218254A (en) | Miniature motors end cap brush and terminal assembly | |
| EP0350193B1 (en) | An armature | |
| KR900003401Y1 (en) | Motor | |
| US5149999A (en) | Power tool with improved internal wiring structure | |
| GB2196489A (en) | Electric motor | |
| GB2199195A (en) | A disc-type armature having insulating cutting correctors | |
| US5153474A (en) | Plug in brush retainer for a fractional horsepower electric motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |