EP0159207A1 - Schnelle Überstrom-Auslösevorrichtung - Google Patents
Schnelle Überstrom-Auslösevorrichtung Download PDFInfo
- Publication number
- EP0159207A1 EP0159207A1 EP85400257A EP85400257A EP0159207A1 EP 0159207 A1 EP0159207 A1 EP 0159207A1 EP 85400257 A EP85400257 A EP 85400257A EP 85400257 A EP85400257 A EP 85400257A EP 0159207 A1 EP0159207 A1 EP 0159207A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- core
- nose
- cylinder head
- cores
- coil
- 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
Links
- 230000000295 complement effect Effects 0.000 claims abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 6
- 230000001681 protective effect Effects 0.000 claims description 10
- 230000000750 progressive effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241001415961 Gaviidae Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Images
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
- H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
-
- 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
- H01F7/081—Magnetic constructions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2454—Electromagnetic mechanisms characterised by the magnetic circuit or active magnetic elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2463—Electromagnetic mechanisms with plunger type armatures
Definitions
- the invention relates to quick release devices used in small short circuit protection devices. These devices include a coil associated with a magnetic circuit comprising a yoke, a fixed core and a movable core with low inertia for the mechanical control of the cut-off of the associated protective device, these cores being separated by an air gap placed in the region maximum flow.
- the object of the present invention is in particular to optimize in a very simple manner the evolution of the force of attraction produced between the fixed core and the movable core as a function of their air gap. It also aims to facilitate the realization, in a space and with a reduced cost, of a quick release device for thin protective device.
- this result is achieved in a device of the type described in the preamble in that the two cores are obtained by flat cutting and have complementary profiles of generally curvilinear shape, that of the two cores which is protruding comprising a nose and a body, the nose being connected to the body by sides whose slope with respect to the main axis of the projecting core gradually increases from the nose to the body.
- the protruding nose core thus has a relatively tapered end along a main axis and inscribed inside a triangle whose base is of dimension equal to the width of the core body and whose height is substantially carried by the axis main nucleus.
- the attraction force between the cores remains substantially constant over a wide range thanks to the progressive variation in the slope of their sides, the variation of this slope being for example between approximately 5 ° near the nose and 90 ° near the body of the projecting core.
- the absence on each core of sides parallel to their main axis removes from the effort / gap curve any bump detrimental to the acceleration of the movable core.
- the end of the nose of the projecting core may have a width - and / or the curvilinear sides of this core may have sections cut to length - at least equal to the thickness of the sheet from which the core is cut.
- the fixed core may advantageously have at least one flat which is housed in a corresponding opening on one face of the cylinder head or of the protective device, while the movable core is mounted in an oblong guide window formed in a parallel face. of the breech.
- the cut-out fixed core forms, for example, a flow closure bridge, the ends of which constitute the support flats.
- the trigger device shown in the figures comprises a magnetic circuit with yoke 1, for example made of copper-plated electrolytic steel or of colaminated steel and copper, and a flat movable core 2, as well as a flat fixed core 3, of complementary profiles obtained by cutting and located in the same plane.
- the movable core 2 acts as a rapid magnetic trip member capable of acting, as a function of the current flowing in a coil 4 supported by an insulating carcass in the form of a sheath 5, on a protective device not shown by means of a transmission mechanism also not shown.
- the movable core is housed so as to be able to slide in a window 6 formed in a branch 7 of the cylinder head, the latter having on the other hand, as the case may be, an opposite parallel branch 8 and two lateral branches 9, 10 (FIGS. 1 and 2) or only two lateral branches 9, 10 ( Figures 3 and 4).
- the fixed core 3 has a nose-shaped or nipple-shaped end 11a, a body 11b and a particular curvilinear profile for connecting the nose to the body whose role, in connection with a recess 12 with a profile complementary to the core mobile 3, will be explained later.
- the protruding core here represented by the fixed core may as well be constituted by the movable core; the two cores could also be mobile.
- the fixed core 2 is engaged and crimped by means of a flat 13 in a window 14 of the branch 8 of the cylinder head; it therefore offers a U shape closed by the branch 7 constituted by a nested bar and crimped on the branches 9, 10 ( Figure 1) or consists of two L, la, lb, nested and comprising one of the branches 7, 10 and the other the branches 8, 9 ( Figure 2).
- the cylinder head consists of a single U-shaped piece comprising the three branches 7, 9, 10; the fixed core 2 has, at its rear part, a bridge 15 for closing the flow provided with two lateral flats 16, 17 allowing the core 2 to be fixed by welding on shoulders 18, 19 (FIG. 3) or by crimping and / or welding in slots 20, -21 (FIG. 4), the shoulders or the slots coming from cutting at the ends of the branches 9, 10 of the cut cylinder head 1.
- notch 22 for passage for a coil connection wire 4 and in branch 9 of the cylinder head, a notch 23 for passage of the other coil connection wire.
- the first connection wire is welded to the notch 22 and the corresponding branch of the cylinder head acts as a support for the fixed contact of the protective device, including the support not shown the movable contact cooperates directly with the outer face of the branch 9; the output of the coil through the notch 23 is obviously isolated.
- Notches such as 24 are provided in the fixed core 2 to facilitate the positioning of the coil 4 and its carcass 5.
- the coil carcass and the fixed core 2 are supported by an insulating part not shown possibly coming from molding with the protective device, and the cylinder head 1 takes a simplified shape in L one of the branches 25 of which comprises the window 6 for guiding the movable core 3 and the other branch 26 of which serves as a support for the fixed contact of the protective device.
- One of the connection wires can be welded to the branch 25 of the cylinder head at 27, the other to a notch 28 formed on the fixed core.
- the trigger shown in FIG. 7 can be given the evolution of the attraction force F as a function of the air gap "e".
- curve III in solid line obtained thanks to the trigger of the invention produces a work area Z of substantially constant effort.
- a preferred profile of the end of the fixed protruding core 2 is illustrated in FIG.
- the slope of the curvilinear sides 29 of connection of the nose 11a to the body 11b of the projecting core gradually increases by approximately 5 ° to 90 ° from the nose towards the body; the width “e l “ of the end of the nose lla is at least equal to the thickness "e” of the sheet from which the core is cut; similarly, the width “e 2 " of cut sections provided at the base of the curvilinear sides 29 is at least equal to the thickness "e" of the sheet.
- the force and acceleration communicated to the movable core during actuation of the trigger are thus made substantially constant over a wide range by means of extremely simple arrangements.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnets (AREA)
- Breakers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8404260A FR2561818B1 (fr) | 1984-03-20 | 1984-03-20 | Dispositif de declenchement rapide a maximum de courant |
FR8404260 | 1984-03-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0159207A1 true EP0159207A1 (de) | 1985-10-23 |
EP0159207B1 EP0159207B1 (de) | 1987-07-22 |
Family
ID=9302213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85400257A Expired EP0159207B1 (de) | 1984-03-20 | 1985-02-14 | Schnelle Überstrom-Auslösevorrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US4605918A (de) |
EP (1) | EP0159207B1 (de) |
JP (1) | JPS60212937A (de) |
DE (1) | DE3560377D1 (de) |
FR (1) | FR2561818B1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5355108A (en) * | 1992-10-05 | 1994-10-11 | Aura Systems, Inc. | Electromagnetically actuated compressor valve |
DE19841499A1 (de) * | 1998-09-10 | 2000-03-30 | Beru Ag | Hubmagnet |
CN104485194B (zh) * | 2014-12-14 | 2016-08-17 | 成都大学 | 一种变磁力线分布比例电磁铁 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1529258A (fr) * | 1967-06-27 | 1968-06-14 | Binder Magnete | électro-aimant à noyau plongeur |
WO1983003387A1 (en) * | 1982-03-29 | 1983-10-13 | Ncr Co | Print wire actuating device and method of manufacture thereof |
FR2527831A1 (fr) * | 1982-05-28 | 1983-12-02 | Telemecanique Electrique | Noyau plongeur, procede pour le fabriquer et relais a seuil d'intensite ainsi equipe |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2992304A (en) * | 1958-01-06 | 1961-07-11 | Cook Electric Co | Electromagnetic thrust motor |
US3593240A (en) * | 1969-03-10 | 1971-07-13 | Whirlpool Co | Solenoid structure having single sheet metal plunger and/or yoke |
EP0081604B1 (de) * | 1981-12-14 | 1986-08-06 | Sprecher & Schuh AG | Eisenkernpaar und Spulenkörper für Wechselstromschütz |
-
1984
- 1984-03-20 FR FR8404260A patent/FR2561818B1/fr not_active Expired
-
1985
- 1985-02-14 EP EP85400257A patent/EP0159207B1/de not_active Expired
- 1985-02-14 DE DE8585400257T patent/DE3560377D1/de not_active Expired
- 1985-03-20 JP JP60057642A patent/JPS60212937A/ja active Pending
- 1985-03-20 US US06/713,944 patent/US4605918A/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1529258A (fr) * | 1967-06-27 | 1968-06-14 | Binder Magnete | électro-aimant à noyau plongeur |
WO1983003387A1 (en) * | 1982-03-29 | 1983-10-13 | Ncr Co | Print wire actuating device and method of manufacture thereof |
FR2527831A1 (fr) * | 1982-05-28 | 1983-12-02 | Telemecanique Electrique | Noyau plongeur, procede pour le fabriquer et relais a seuil d'intensite ainsi equipe |
Also Published As
Publication number | Publication date |
---|---|
JPS60212937A (ja) | 1985-10-25 |
DE3560377D1 (en) | 1987-08-27 |
FR2561818B1 (fr) | 1988-04-15 |
US4605918A (en) | 1986-08-12 |
FR2561818A1 (fr) | 1985-09-27 |
EP0159207B1 (de) | 1987-07-22 |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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