EP 2171739 B1 20150826 - CONTROL APPARATUS FOR A SWITCHING DEVICE WITH A PULL-IN COIL AND/OR A HOLDING COIL AND METHOD FOR CONTROLLING THE CURRENT FLOWING THROUGH THE COIL
Title (en)
CONTROL APPARATUS FOR A SWITCHING DEVICE WITH A PULL-IN COIL AND/OR A HOLDING COIL AND METHOD FOR CONTROLLING THE CURRENT FLOWING THROUGH THE COIL
Title (de)
STEUERUNGSVORRICHTUNG FÜR EIN SCHALTGERÄT MIT ANZUGS- UND/ODER HALTESPULE SOWIE VERFAHREN ZUM STEUERN DES DURCH DIE SPULE FLIESSENDEN STROMS
Title (fr)
DISPOSITIF DE COMMANDE POUR UN COMMUTATEUR COMPRENANT UNE BOBINE DE COLLAGE ET/OU DE MAINTIEN ET PROCÉDÉ DE COMMANDE DU COURANT QUI CIRCULE À TRAVERS LA BOBINE
Publication
Application
Priority
- EP 2008002909 W 20080412
- DE 102007031995 A 20070709
Abstract (en)
[origin: CA2693408A1] When driving a switching device with a pull-in coil and/or a holding coil (2), it is advantageous if the current through the coil (2) is approximately constant irrespective of the switching state, pulling-in or holding. In order to avoid current measurement which is complex in terms of circuitry and measurement technology or a complex control unit (8) with core value tables stored therein for the various switching states, the invention provides a control apparatus (1) for a switching device where the control apparatus (1) comprises a pulse-width-controlled switching apparatus (3) which is connected to the coil (2), and a control unit (4), which is connected to the switching apparatus (3) and generates a control signal with an adjustable pulse width, wherein the control unit (4) determines the pulse width of the control signal as a function of the input voltage signal (U) of the control unit (4) in such a way that the control apparatus (1) keeps the current through the pull-in coil and/or the holding coil (2) of the switching device approximately constant. Such a control apparatus is integrated in a switching device. In the method for controlling the current flowing through a pull-in coil and/or a holding coil (2) of the switching device, the input voltage (U) of the switching device is determined and a pulse-width-modulation signal for driving a switching apparatus is determined as a function of a predeterminable setpoint voltage value (USp,soll) of the coil voltage (USp), with the result that a switching apparatus (3) keeps the current through the pull-in coil and/or the holding coil (2) of the switching device approximately constant.
IPC 8 full level
H01H 47/32 (2006.01)
CPC (source: EP US)
H01H 47/325 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 102007031995 A1 20090115; CA 2693408 A1 20090115; CN 101689442 A 20100331; EP 2171739 A2 20100407; EP 2171739 B1 20150826; JP 2010532958 A 20101014; JP 4991936 B2 20120808; US 2010289603 A1 20101118; WO 2009006952 A2 20090115; WO 2009006952 A3 20090312
DOCDB simple family (application)
DE 102007031995 A 20070709; CA 2693408 A 20080412; CN 200880024282 A 20080412; EP 08735197 A 20080412; EP 2008002909 W 20080412; JP 2010515353 A 20080412; US 66544608 A 20080412