EP 0387729 B1 19950503 - Electronic control for contactor.
Title (en)
Electronic control for contactor.
Title (de)
Elektronische Schützansteuerung.
Title (fr)
Commande électronique d'un contacteur.
Publication
Application
Priority
DE 3908192 A 19890314
Abstract (en)
[origin: EP0387729A2] 2.1 Electronic control for a contactor for regulating the DC supply in the case of a fluctuating supply voltage and a varying winding resistance of the drive coil, by means of current pulsing and a freewheeling circuit for maintaining the contactor during the phases when the current is switched off. The invention is based on the object of providing a control with a high current load capability and ensuring low-loss precise current measurement for actual value detection in the regulation loop. <??>2.2 The invention is characterised in that the actuator of the regulation loop is an integrated power semi-conductor circuit which contains a large number of FETs connected in parallel, at least one of which is used as measurement output (6) for detecting the load current flowing through the other parallel paths, in that the current signal of the measurement output (6) is converted into a voltage signal (9), using an operational amplifier (8) connected as a current-voltage converter, and is used as the actual value for the regulating elements (10, 11, 12) of the current pulsing. <??>2.3 DC contactors having a regulated supply. <IMAGE>
IPC 1-7
IPC 8 full level
H01H 47/04 (2006.01); H01H 47/32 (2006.01); H03K 17/695 (2006.01)
CPC (source: EP US)
H01H 47/325 (2013.01 - EP US)
Designated contracting state (EPC)
CH DE DK ES FR GB IT LI SE
DOCDB simple family (publication)
EP 0387729 A2 19900919; EP 0387729 A3 19901122; EP 0387729 B1 19950503; DE 3908192 A1 19900920; DE 3908192 C2 19911128; DE 59008993 D1 19950608; DK 0387729 T3 19950918; ES 2073467 T3 19950816; JP 3057571 B2 20000626; JP H02281527 A 19901119; US 5113307 A 19920512
DOCDB simple family (application)
EP 90104583 A 19900310; DE 3908192 A 19890314; DE 59008993 T 19900310; DK 90104583 T 19900310; ES 90104583 T 19900310; JP 6016790 A 19900313; US 48789790 A 19900306