EP 0829123 B1 19990203 - FREE-WHEEL CIRCUIT WITH AN ADJUSTABLE OFF DELAY TIME
Title (en)
FREE-WHEEL CIRCUIT WITH AN ADJUSTABLE OFF DELAY TIME
Title (de)
FREILAUFKREIS MIT EINSTELLBARER AUS-VERZUGSZEIT
Title (fr)
CIRCUIT DE ROUE LIBRE A DUREE DE TEMPORISATION D'ARRET REGLABLE
Publication
Application
Priority
- DE 9600899 W 19960523
- DE 19519757 A 19950530
Abstract (en)
[origin: DE19519757A1] The object of the invention is to eliminate the magnetic residual energy stored in a coil (1) within a short or specific time by means of a free-wheel circuit connected in parallel. The free-wheel circuit comprises, in parallel with the coil (1), a series circuit comprising a first diode (2) and a first switching transistor (4) with which a non-linear resistor (3) is connected in parallel. The first switching transistor (4) is triggered by a parallel circuit comprising a capacitor (6) and a first ohmic resistor (7) with which a second switching transistor (9) is connected in parallel. When a cut-out overvoltage occurs at the coil (1), the second switching transistor (9) is tripped, thereby reliably blocking the first switching transistor (4) such that the residual energy is consequently eliminated via the non-linear resistor (3).
IPC 1-7
IPC 8 full level
H02H 9/04 (2006.01)
CPC (source: EP US)
H01F 7/1811 (2013.01 - EP US); H01F 7/1883 (2013.01 - EP US)
Designated contracting state (EPC)
FR IT
DOCDB simple family (publication)
DE 19519757 A1 19961212; DE 19519757 C2 19970424; CN 1080014 C 20020227; CN 1185240 A 19980617; EP 0829123 A1 19980318; EP 0829123 B1 19990203; US 5933312 A 19990803; WO 9638893 A1 19961205
DOCDB simple family (application)
DE 19519757 A 19950530; CN 96194128 A 19960523; DE 9600899 W 19960523; EP 96919570 A 19960523; US 94592098 A 19980310