GB2204183A - Alternating current magnet with a short circuit ring - Google Patents

Alternating current magnet with a short circuit ring Download PDF

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Publication number
GB2204183A
GB2204183A GB08809695A GB8809695A GB2204183A GB 2204183 A GB2204183 A GB 2204183A GB 08809695 A GB08809695 A GB 08809695A GB 8809695 A GB8809695 A GB 8809695A GB 2204183 A GB2204183 A GB 2204183A
Authority
GB
United Kingdom
Prior art keywords
groove
alternating current
current magnet
closure
circuit ring
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.)
Granted
Application number
GB08809695A
Other versions
GB8809695D0 (en
GB2204183B (en
Inventor
Hans Gehbauer
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.)
Rockwell Automation Switzerland GmbH
Original Assignee
Sprecher und Schuh AG
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 Sprecher und Schuh AG filed Critical Sprecher und Schuh AG
Publication of GB8809695D0 publication Critical patent/GB8809695D0/en
Publication of GB2204183A publication Critical patent/GB2204183A/en
Application granted granted Critical
Publication of GB2204183B publication Critical patent/GB2204183B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements
    • H01F7/1205—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements having short-circuited conductors

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

2204183 An Alternating Current Magnet with at least one short circuit
ring.
The present invention relates to an alternating current magnet with at least one short-circuit ring which lies at least in one groove of a laminated iron core and is retained therein by a groove closure which has at least the length of the groove and projects into the lateral grooves arranged in the opposite groove walls.
From German Design (DE-GM) No. 1,779,078 an alternating current magnet is known of the type mentioned at the outset. In this arrangement the groove closure is wedge-shaped, of an easily moulded material, e.g.
aluminium and is pressed in, in order to fix the short circuit ring into the wedge-shaped lateral grooves.
The short-circuit ring itself is covered with an impact attenuating sleeve made of silicone rubber, in order to attenuate the impact caused by striking of the magnet armature. Covering the short-circuit ring therefore requires a method step which involves considerable costs. Pressing the groove closure of aluminium into the wedge-shaped lateral grooves is complicated and may be carried out only with a relatively expensive device.
Among aims of the present invention are to create an alternating current magnet of the type mentioned at the outset, in which any impact by the magnet armature on the short-circuit ring is attenuated, and in which the short-circuit ring is fixed in the groove by simple means.
Accordingly, the invention proposes an alternating current magnet with at least one short-circuit ring, which lies at least in one groove of a laminated iron core and is retained therein by a groove closure which 2 has at least the length of the groove and projects into the lateral grooves arranged in the opposite groove walls, characterised in that the groove closure projecting into the lateral grooves comprises a material with the resilience of rubber. This groove closure attenuates any blow on the short-circuit ring by butting the magnet armature. Moreover, this groove closure may be inserted into the groove using simple means and is economically advantageous.
Preferably the groove closure is of silicone rubber with a cross section which is round in the relaxed state, wherein the lateral grooves may have a circle segment shaped cross section. The groove closure may protrude out of the iron core at the ends of the groove.
An examplary embodiment of the invention is now described with reference to the enclosed drawings, in which:
Fig.1 shows a cross-section through part of an alternating current magnet which is equipped with a short-circuit ring; and Fig.2 shows the plan view of this arrangement.
In Fig.1 a" part of a laminated iron core 1 of an alternating current magnet with a short-circuit ring 2 is shown in section. The section line is designated A-A in Fig.2, which Fig.2 shows the plan view of the arrangement.
The short circuit ring 2 is placed into the grooves 3 in the iron core 1. The groove 3 has near its mouth two circular segment-shaped lateral grooves 4 recessed in the opposite walls of the groove 3. 1% 3 The groove closure 5, which is circular in the relaxed state, projects into the lateral grooves 4. The groove closure 5 comprises a material with the resilience of rubber. such as silicone rubber for example. In the position of rest in terms of operation, at the ends of the groove 3, the groove closure 5 protrudes slightly out of the iron core 1 at its end.
The pre-moulded short-circuit ring 2 is placed first of all into the groove 3 of the laminated iron core 1.
Then the groove closure 5 comprising material with the resilience of rubber is stretched until its width is smaller than the width of the mouth of the groove 3. In this stretched state the groove closure 5 is placed into the groove 3 and then released. The relaxed groove closure 5 is so wide that it projects into the lateral grooves 4 in the groove walls. The short-circuit ring 5 is retained in the groove 3 of the iron core 1 by this inserted groove closure 5. The stretching of the groove closure 5 may be implemented manually or, with automatic assembly lines, may be achieved by appropriate devices.
The groove closure 5 may of course also be simply pressed into the groove 3.
The groove closure 5, comprising material with the resilience of rubber, attenuates any impact on the short-circuit ring 2 by the magnet armature, which is not shown in the figures.
The special advantages of the alternating current magnet, formed in. accordance with the invention, consists in that the groove closure 5 with the resilience of rubber both attenuates any impact on the short-circuit ring 2 by the magnet armature and retains the short circuiting ring 2 in the groove 3. This dual function may be achieved by the economically 1 4 advantageous groove closure 5 comprising material with 1 the resilience of rubber. 11) k, A 1 5

Claims (5)

1 - Claims
1. An alternating current magnet with at least one short-circuit ring, which lies at least in one groove (3) of a laminated iron core (1) and is retained therein by a groove closure which has at least the length of the groove and projects into the lateral grooves arranged ih the opposite groove walls, characterised in that the groove closure (5) projecting into the lateral grooves (4) comprises a material with the resilience of rubber.
2. An alternating current magnet according to claim 1, characterised in that the groove closure (5) comprises silicone rubber.
3. An alternating current magnet according to any one of claims 1 or 2, characterised in that the relaxed groove closure (5) has a round cross section and the lateral grooves (4) have a circul.ar segment-shaped cross section.
4. An alternating current magnet according to any one of claims 1 to 3, characterised in that the groove closure (5) protrudes at the ends of the groove out of the iron core (1).
5. An alternating current magnet substantially as herein described with reference to the accompanying drawings.
Published 1988 at The Patent Ofnce, State House, 66171 High Holborn, London WC1R 4TP. Further copies may be obtained from The Patent Offtee, Wee Brancb, St Mary Gray, Orpington, Kent BR5 3RD. Printed by Multiplex tecbniques ltd, St Mary Gray, Kent. Con. 1167.
GB8809695A 1987-04-24 1988-04-25 An alternating current magnet with at least one short circuit ring Expired - Fee Related GB2204183B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH157587A CH673171A5 (en) 1987-04-24 1987-04-24

Publications (3)

Publication Number Publication Date
GB8809695D0 GB8809695D0 (en) 1988-06-02
GB2204183A true GB2204183A (en) 1988-11-02
GB2204183B GB2204183B (en) 1990-06-20

Family

ID=4213622

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8809695A Expired - Fee Related GB2204183B (en) 1987-04-24 1988-04-25 An alternating current magnet with at least one short circuit ring

Country Status (4)

Country Link
CH (1) CH673171A5 (en)
DE (1) DE3802689C2 (en)
FR (1) FR2614464B1 (en)
GB (1) GB2204183B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104458178B (en) * 2014-12-22 2017-10-13 黄俊龙 The attachment structure of electric vibration table central magnetic pole and short-circuited conducting sleeve

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1061010A (en) * 1964-05-15 1967-03-08 Westinghouse Electric Corp Electromagnetic device
GB1365608A (en) * 1971-05-14 1974-09-04 Sprecher & Schuh Ag Electromagnet more particularly for driving electric switchgear

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1032828B (en) * 1953-04-24 1958-06-26 Siemens Ag Groove for fixing short-circuit rings in switching magnets
DE1040671B (en) * 1957-05-27 1958-10-09 Amag Hilpert Pegnitzhuette A G Groove lock for electrical machines
DE1779078U (en) * 1958-02-03 1958-12-11 Licentia Gmbh AC solenoid with grooved short-circuit rings.
DE1848289U (en) * 1961-09-11 1962-03-15 Licentia Gmbh AC MAGNET.
DE6607531U (en) * 1962-09-29 1971-04-08 Siemens Ag AC TRAIN MAGNET
FR1337168A (en) * 1962-10-29 1963-09-06 Bbc Brown Boveri & Cie alternating current electromagnet with short-circuited windings in the pole surfaces
DE1869754U (en) * 1963-01-09 1963-04-04 Stotz Kontakt Gmbh AC MAGNET WITH ELASTICALLY CONNECTED SHORT-CIRCUIT WINDING.
FR1510049A (en) * 1966-12-06 1968-01-19 Unelec Device for fixing the phase shift ring of an alternating current electromagnet
SU595830A1 (en) * 1974-07-05 1978-02-28 Предприятие П/Я А-7676 Device for securing winding in electric machine core slot

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1061010A (en) * 1964-05-15 1967-03-08 Westinghouse Electric Corp Electromagnetic device
GB1365608A (en) * 1971-05-14 1974-09-04 Sprecher & Schuh Ag Electromagnet more particularly for driving electric switchgear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104458178B (en) * 2014-12-22 2017-10-13 黄俊龙 The attachment structure of electric vibration table central magnetic pole and short-circuited conducting sleeve

Also Published As

Publication number Publication date
DE3802689A1 (en) 1988-11-17
GB8809695D0 (en) 1988-06-02
FR2614464A1 (en) 1988-10-28
FR2614464B1 (en) 1991-08-30
GB2204183B (en) 1990-06-20
DE3802689C2 (en) 1998-04-30
CH673171A5 (en) 1990-02-15

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070425