EP 0215828 B1 19880525 - VALVE CONTROL CIRCUIT
Title (en)
VALVE CONTROL CIRCUIT
Publication
Application
Priority
DE 3508187 A 19850305
Abstract (en)
[origin: WO8605236A1] The current is regulated by the exciting winding (28) of a valve that can be electromagnetically actuated in response to a signal voltage (UG?) used as a command variable. To this purpose, the signal voltage (UG?) and a return voltage (Ud?) are supplied to an integrating regulator (10). The regulator (10) commands a pulse width modulator (20). The latter commands a switching transistor (24) which is in series with the exciting winding (28). A diode (32) is connected parallel to the exciting winding (28). Return means create a return voltage (Ud?) which is proportional to the modulated current (IL?) through the exciting winding (28), even during the cutoff period, during which the switching transistor (24) is shut off.
IPC 1-7
IPC 8 full level
F02D 41/20 (2006.01); H03K 17/64 (2006.01)
CPC (source: EP)
F02D 41/20 (2013.01); F02D 2041/2027 (2013.01); F02D 2041/2041 (2013.01); F02D 2041/2058 (2013.01); F02D 2041/2075 (2013.01)
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
WO 8605236 A1 19860912; DE 3508187 A1 19860911; DE 3508187 C2 19881110; DE 3660225 D1 19880630; EP 0215828 A1 19870401; EP 0215828 B1 19880525
DOCDB simple family (application)
EP 8600083 W 19860219; DE 3508187 A 19850305; DE 3660225 T 19860219; EP 86901387 A 19860219