EP 0837479 B1 20030115 - Driver circuit for electromagnet
Title (en)
Driver circuit for electromagnet
Title (de)
Elektromagnettreiberschaltung
Title (fr)
Circuit d'attaque pour électroaimant
Publication
Application
Priority
US 73147296 A 19961016
Abstract (en)
[origin: MX9707840A] An electrical circuit applies as oscillatory electrical current to a coil of a solenoid in order to cause the solenoid to move in response to a command signal. The circuit includes a signal divider for generating an upper peak current signal value from the command signal and a lower peak current signal value which is a fixed percentage of the voltage representing current through the coil. A first comparator compares the current sense voltage to the upper current signal value. A second comparator compares the current driver on and off. A current driver applies a driving current to the solenoid coil as a function of output signals generated by the first and second comparators so that the coil current will have a lower peak current value which is substantially a fixed percentage of the upper peak current value.
IPC 1-7
IPC 8 full level
F16K 31/06 (2006.01); G05B 11/28 (2006.01); H01F 7/18 (2006.01)
CPC (source: EP US)
H01F 7/1844 (2013.01 - EP US); H01F 2007/1855 (2013.01 - EP US)
Designated contracting state (EPC)
DE ES FR GB IT
DOCDB simple family (publication)
EP 0837479 A2 19980422; EP 0837479 A3 19990113; EP 0837479 B1 20030115; AR 010497 A1 20000628; AU 3996197 A 19980514; AU 693746 B2 19980702; BR 9705040 A 19990330; CA 2209425 A1 19980416; CA 2209425 C 20000222; DE 59709139 D1 20030220; ES 2185854 T3 20030501; JP 3068043 B2 20000724; JP H10125529 A 19980515; MX 9707840 A 19980430; US 5748431 A 19980505
DOCDB simple family (application)
EP 97117371 A 19971008; AR P970104530 A 19971001; AU 3996197 A 19971007; BR 9705040 A 19971015; CA 2209425 A 19970704; DE 59709139 T 19971008; ES 97117371 T 19971008; JP 28358397 A 19971016; MX 9707840 A 19971010; US 73147296 A 19961016