EP2881963B1 - Relay magnet drive - Google Patents
Relay magnet drive Download PDFInfo
- Publication number
- EP2881963B1 EP2881963B1 EP13196315.9A EP13196315A EP2881963B1 EP 2881963 B1 EP2881963 B1 EP 2881963B1 EP 13196315 A EP13196315 A EP 13196315A EP 2881963 B1 EP2881963 B1 EP 2881963B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- relay
- permanent magnet
- magnetic drive
- plate
- 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.)
- Active
Links
- 230000004907 flux Effects 0.000 description 4
- 101100390736 Danio rerio fign gene Proteins 0.000 description 1
- 101100390738 Mus musculus Fign gene Proteins 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2227—Polarised relays in which the movable part comprises at least one permanent magnet, sandwiched between pole-plates, each forming an active air-gap with parts of the stationary magnetic circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/32—Driving mechanisms, i.e. for transmitting driving force to the contacts
- H01H3/46—Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
- H01H50/645—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection
- H01H50/646—Driving arrangements between movable part of magnetic circuit and contact intermediate part making a resilient or flexible connection intermediate part being a blade spring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H51/00—Electromagnetic relays
- H01H51/22—Polarised relays
- H01H51/2272—Polarised relays comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
- H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
- H01H2001/265—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support having special features for supporting, locating or pre-stressing the contact blade springs
Definitions
- the present invention relates to a relay magnetic drive with a umpolbaren magnetic coil with a magnetic circuit, at the two yoke legs a permanent magnet exhibiting armature is pivotally mounted between two end positions, wherein the permanent magnet between two armature plates of the armature is arranged with their projecting beyond the permanent magnet Plate ends abut in the two end positions of the armature respectively at the two yoke legs.
- a relay with such a relay magnetic drive is for example by the DE 10 2007 011 328 A1 known.
- the relay magnetic drive is used in a closing or interrupting the circuit between two relay contacts contact spring whose one end of the spring is electrically conductively attached to the first relay contact, the other, free spring end either in a voltage applied to the second relay contact, closed relay position or in a to deflect from the second relay contact lifted, open relay position.
- relay magnetic drive is in the US-A-2013/229246 disclosed.
- the inventive taper of the protruding anchor plate ends causes a bunching of the magnetic field lines, which leads to a higher holding force between the anchor plate and yoke legs.
- the drive characteristic can be increased sufficiently enough without having to use expensive rare earth materials for the permanent magnet.
- the end face of the anchor plates is in each case at most half as large as the cross-sectional area of the non-tapered middle plate region of the anchor plates.
- the anchor plates with their non-tapered central plate region can partially protrude beyond the permanent magnet.
- thicker armature plates and / or a thicker permanent magnet are preferably used in order to reduce strong stray fluxes and thus allow the magnetic flux to flow mainly through the center of the armature plates.
- the thickness ratio of anchor plate to permanent magnet is at least 45%.
- the plate ends each taper over two planar inclined surfaces, which continue up to the end face.
- the plate ends may, for example, also taper over concave or convex curved surfaces.
- the invention also relates to a relay having at least one contact spring closing or interrupting the circuit between two relay contacts and having a magnetic drive as described above for deflecting the at least one contact spring.
- Relay 1 shown comprises two relay contacts 2, 3 and a circuit between the two relay contacts 2, 3 closing or interrupting contact spring 4, which is designed as an electrically conductive leaf or flat spring.
- One end of the contact spring 4 is electrically conductive to the in Fig. 1 fixed upper relay contact 2, while the other, free end 5 carries a contact button 6 and 7 is deflectable by means of a magnetic drive.
- the contact spring 4 is in the closed relay position ( Fig. 1 a) deflected downwards such that its contact button 6 abuts against a contact button 8 of the lower relay contact 3, and in the open relay position ( Fig. 1b ) so deflected upward that its contact button 6 is lifted from the contact button 8 of the lower relay contact 3.
- the magnetic drive 7 comprises a umpolbare magnetic coil 9 with a magnetic circuit, at the two yoke legs 10, an armature (armature rocker) 11 with a permanent magnet 12 (FIG. Fig. 2 ) is pivotally mounted.
- the permanent magnet 12 is arranged between two armature plates 13 , which with their over the permanent magnet 12 projecting plate ends 13 a ( Fig. 2 ) abut each of the yoke legs 10 in the two switching positions of the armature 11.
- the magnetic coil 9 and the pivotable between its two switching positions armature 11 form a H-anchor suit.
- the armature 11 has a radially projecting arm 14 which engages under the contact spring 4 in the deflection direction (double arrow 15) with a lower projection 16 and engages over an upper projection 17 .
- the contact spring 4 in the deflection 15 between the two projections 16, 17 is arranged.
- an additional leaf spring 18 is attached from spring steel whose free end is overlapped by the upper projection 17.
- the armature 11 takes with the lower projection 16, the contact spring 4 in the opening direction of the relay 1, ie upwards, and with the upper projection 17 by means of the additional leaf spring 18, the contact spring 4 in the closing direction of the relay 1, ie down, with.
- the contact spring 4 is coupled to the armature 11 in the opening and closing direction.
- the contact spring 4 is formed as a multilayer leaf spring with a laterally projecting from its plane arc portion 19 .
- the magnetic field of the magnetic coil 9 is reversed, whereby the armature 11 is pivoted and thereby the contact spring 4 is deflected.
- the closed relay position ( Fig. 1a ) is the contact spring 4 deflected by the upper projection 17 of the downwardly pivoted arm 14 down to the contact of their contact button 6 to the contact button 8 of the lower relay contact 3.
- the contact pressure of the contact button 6 to the contact button 8 of the lower relay contact 3 is given by the pressing force of the leaf spring 18 compressed by the armature 11.
- the leaf spring 18 counteracts the deflection of the contact spring 4 in the opening direction, resulting in a bounce-reduced closing of the relay 1 leads.
- the open relay position the contact spring 4 is deflected by the lower projection 16 of the upwardly pivoted arm 14 upwards and thereby the contact button 6 is lifted from the contact button 8 of the lower relay contact 3.
- the projecting plate ends 13a of the anchor plates 13 taper towards their respective end face 20 and on their longitudinal center plane 21 and on the longitudinal center plane of the armature 11.
- the anchor plates 11 each have a central plate portion 13b , which may also extend beyond the permanent magnet 12 addition.
- the plate ends 13a each taper over two planar oblique surfaces 22, which - here, for example only, at about 45 ° - connect to the central plate region 13b and continue up to the end surface 20.
- the end faces 20 are at most half as large as the cross-sectional area of the central plate portion 13b.
- the tapered plate ends 13a cause a bundling of the magnetic field lines, which leads to a higher holding force between the armature plate 13 and yoke leg 10.
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
Description
Die vorliegende Erfindung betrifft einen Relais-Magnetantrieb mit einer umpolbaren Magnetspule mit einem Magnetkreis, an dessen zwei Jochschenkeln ein einen Permanentmagneten aufweisender Anker schwenkbar zwischen zwei Endstellungen gelagert ist, wobei der Permanentmagnet zwischen zwei Ankerplatten des Ankers angeordnet ist, die mit ihren über den Permanentmagneten überstehenden Plattenenden in den beiden Endstellungen des Ankers jeweils an den beiden Jochschenkeln anliegen.The present invention relates to a relay magnetic drive with a umpolbaren magnetic coil with a magnetic circuit, at the two yoke legs a permanent magnet exhibiting armature is pivotally mounted between two end positions, wherein the permanent magnet between two armature plates of the armature is arranged with their projecting beyond the permanent magnet Plate ends abut in the two end positions of the armature respectively at the two yoke legs.
Ein Relais mit einem solchen Relais-Magnetantrieb ist beispielsweise durch die
Ein weiteres Beispiel von Relais-Magnetantrieb ist in der
Es die Aufgabe der vorliegenden Erfindung, einen Relais-Magnetantrieb der eingangs genannten Art weiter zu optimieren und insbesondere noch leistungsstärker zu machen.It is the object of the present invention to further optimize a relay magnetic drive of the aforementioned type and in particular to make it even more powerful.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst.This object is achieved by the features of
Die erfindungsgemäße Verjüngung der überstehenden Ankerplattenenden bewirkt eine Bündelung der magnetischen Feldlinien, die zu einer höheren Haltekraft zwischen Ankerplatte und Jochschenkel führt. Durch diese Maßnahme kann die Antriebskennlinie ausreichend genug gesteigert werden, ohne teure Seltenerdwerkstoffe für den Permanentmagneten verwenden zu müssen.The inventive taper of the protruding anchor plate ends causes a bunching of the magnetic field lines, which leads to a higher holding force between the anchor plate and yoke legs. By this measure, the drive characteristic can be increased sufficiently enough without having to use expensive rare earth materials for the permanent magnet.
Bevorzugt ist die Stirnfläche der Ankerplatten jeweils höchstens halb so groß wie die Querschnittfläche des nicht-verjüngten mittleren Plattenbereichs der Ankerplatten. Dabei können die Ankerplatten mit ihrem nicht-verjüngten mittleren Plattenbereich teilweise über den Permanentmagneten überstehen.Preferably, the end face of the anchor plates is in each case at most half as large as the cross-sectional area of the non-tapered middle plate region of the anchor plates. In this case, the anchor plates with their non-tapered central plate region can partially protrude beyond the permanent magnet.
Im Vergleich zu bekannten Ankern werden bevorzugt dickere Ankerplatten und/oder ein dickerer Permanentmagnet eingesetzt, um starke Streuflüsse zu reduzieren und so dem magnetischen Fluss die Möglichkeit zu geben, hauptsächlich durch das Zentrum der Ankerplatten zu fließen. Vorteilhaft beträgt das Dickenverhältnis von Ankerplatte zu Permanentmagnet mindestens 45%.In comparison to known anchors, thicker armature plates and / or a thicker permanent magnet are preferably used in order to reduce strong stray fluxes and thus allow the magnetic flux to flow mainly through the center of the armature plates. Advantageously, the thickness ratio of anchor plate to permanent magnet is at least 45%.
Vorzugsweise verjüngen sich die Plattenenden jeweils über zwei plane Schrägflächen, die sich bis zur Stirnfläche fortsetzen. Alternativ können sich die Plattenenden beispielsweise auch über konkav oder konvex gekrümmte Flächen verjüngen.Preferably, the plate ends each taper over two planar inclined surfaces, which continue up to the end face. Alternatively, the plate ends may, for example, also taper over concave or convex curved surfaces.
Die Erfindung betrifft auch ein Relais mit mindestens einer den Stromkreis zwischen zwei Relaiskontakten schließenden oder unterbrechenden Kontaktfeder und mit einem wie oben beschriebenen Magnetantrieb zum Auslenken der mindestens einen Kontaktfeder.The invention also relates to a relay having at least one contact spring closing or interrupting the circuit between two relay contacts and having a magnetic drive as described above for deflecting the at least one contact spring.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstands der Erfindung sind der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar. Ebenso können die vorstehend genannten und die noch weiter aufgeführten Merkmale je für sich oder zu mehreren in beliebigen Kombinationen Verwendung finden. Die gezeigte und beschriebene Ausführungsform ist nicht als abschließende Aufzählung zu verstehen, sondern hat vielmehr beispielhaften Charakter für die Schilderung der Erfindung.Further advantages and advantageous embodiments of the subject invention are the description, the drawings and claims removed. Likewise, the features mentioned above and the features listed further can be used individually or in combination in any combination. The embodiment shown and described is not to be understood as an exhaustive list, but rather has exemplary character for the description of the invention.
Es zeigen:
- Fign. 1a, 1b
- ein Relais mit einem erfindungsgemäßen Magnetantrieb in einer geschlossenen Relaisposition (
Fig. 1a ) und in einer geöffneten Relaisposition (Fig. 1b ); und - Fig. 2
- eine perspektivische Detailansicht eines in
Fig. 1 gezeigten Ankers.
- FIGS. 1a, 1b
- a relay with a magnetic drive according to the invention in a closed relay position (
Fig. 1a ) and in an open relay position (Fig. 1b ); and - Fig. 2
- a detailed perspective view of an in
Fig. 1 shown anchor.
Das in den
Der Magnetantrieb 7 umfasst eine umpolbare Magnetspule 9 mit einem Magnetkreis, an dessen zwei Jochschenkeln 10 ein Anker (Ankerwippe) 11 mit einem Permanentmagneten 12 (
Der Anker 11 nimmt mit dem unteren Vorsprung 16 die Kontaktfeder 4 in Öffnungsrichtung des Relais 1, d.h. nach oben, und mit dem oberen Vorsprung 17 mittels der zusätzlichen Blattfeder 18 die Kontaktfeder 4 in Schließrichtung des Relais 1, d.h. nach unten, mit. Mit anderen Worten ist die Kontaktfeder 4 mit dem Anker 11 in Öffnungs- und Schließrichtung bewegungsgekoppelt. Die Kontaktfeder 4 ist als eine mehrschichtige Blattfeder mit einem seitlich aus ihrer Ebene vorstehenden Bogenabschnitt 19 ausgebildet.The
Zum Schalten des Relais 1 wird das Magnetfeld der Magnetspule 9 umgepolt, wodurch der Anker 11 verschwenkt und dadurch die Kontaktfeder 4 ausgelenkt wird. In der geschlossenen Relaisposition (
Wie in
Im Vergleich zu bekannten Ankern, bei denen die Ankerplatten jeweils 1,25mm dick und der Permanentmagnet 3,0mm dick ist, also das Dickenverhältnis von Ankerplatte zu Permanentmagnet ca. 41,6% beträgt, wurden sowohl dickere Ankerplatten 13 (1,5mm) als auch ein dickerer Permanentmagnet 12 (3,2mm) verwendet, wodurch das Dickenverhältnis von Ankerplatte 13 zu Permanentmagnet 12 ca. 46,9% beträgt. Durch diese Maßnahme werden starke Streuflüsse reduziert, so dass der magnetische Fluss hauptsächlich durch das Zentrum der Ankerplatten 13 fließt und dadurch die Haltekraft zwischen Ankerplatte 13 und Jochschenkel 10 weiter erhöht ist.In comparison to known anchors, where the anchor plates each 1.25mm thick and the permanent magnet is 3.0mm thick, so the thickness ratio of anchor plate to permanent magnet is about 41.6%, were both thicker anchor plates 13 (1.5mm) than Also, a thicker permanent magnet 12 (3.2mm) is used, whereby the thickness ratio of
Claims (6)
- Relay magnetic drive (7) comprising a pole-reversible solenoid (9) with a magnetic circuit, at the two yoke legs (10) of which an armature (11) having a permanent magnet (12) is pivotably mounted between two end positions, wherein the permanent magnet (12) is arranged between two armature plates (13) of the armature (11), wherein each of the plate ends (13a) of the armature plates, which project beyond the permanent magnet (12), abuts one of the two yoke legs (10) in the two end positions of the armature (11), wherein the plate ends (13a) of the armature plates (13) taper towards their respective end face (20),
characterized in that
for bundling the magnetic field lines, the plate ends (13a) of the armature plates (13) each of which abuts one of the two yoke legs (10) in the two end positions of the armature (11) taper towards their longitudinal center plane (21). - Relay magnetic drive according to claim 1, characterized in that each end face (19) of the armature plates (13) is at most half the size of the cross-sectional surface of the non-tapering middle plate area (13b) of the armature plates (13).
- Relay magnetic drive according to claim 1 or 2, characterized in that the non-tapering middle plate area (13b) of the armature plate (13) partially projects past the permanent magnet (12).
- Relay magnetic drive according to any one of the preceding claims, characterized in that the thickness ratio between the armature plate (13) and the permanent magnet (12) is at least 45%.
- Relay magnetic drive according to any one of the preceding claims, characterized in that the plate ends (13a) each taper via two inclined surfaces (22) that continue up to the end face (20).
- Relay (1) comprising at least one contact spring (4), which closes or interrupts the electric circuit between two relay contacts (2, 3), and a magnetic drive (7) for deflecting the at least one contact spring (4) according to any one of the preceding claims.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13196315.9A EP2881963B1 (en) | 2013-12-09 | 2013-12-09 | Relay magnet drive |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13196315.9A EP2881963B1 (en) | 2013-12-09 | 2013-12-09 | Relay magnet drive |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2881963A1 EP2881963A1 (en) | 2015-06-10 |
EP2881963B1 true EP2881963B1 (en) | 2017-08-09 |
Family
ID=49725066
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13196315.9A Active EP2881963B1 (en) | 2013-12-09 | 2013-12-09 | Relay magnet drive |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP2881963B1 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007011328A1 (en) | 2007-03-08 | 2008-09-11 | Gruner Ag | relay |
KR20130111566A (en) * | 2010-11-30 | 2013-10-10 | 후지 덴키 기기세이교 가부시끼가이샤 | Latching relay |
CN103295847B (en) * | 2012-03-01 | 2016-12-07 | 德昌电机(深圳)有限公司 | Driving means and there is the relay of this driving means |
-
2013
- 2013-12-09 EP EP13196315.9A patent/EP2881963B1/en active Active
Non-Patent Citations (1)
Title |
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None * |
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Publication number | Publication date |
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EP2881963A1 (en) | 2015-06-10 |
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