EP 0589603 B1 19990519 - Exciter circuits and methods with protective measures for solid state switches
Title (en)
Exciter circuits and methods with protective measures for solid state switches
Title (de)
Erregerkreise und Methoden mit Schutzmassnahmen für Halbleiterschalter
Title (fr)
Circuits d'excitation et méthodes comprenant des mesures protectrices pour des commutateurs à l'état solide
Publication
Application
Priority
- US 94931992 A 19920922
- US 99486592 A 19921222
Abstract (en)
[origin: EP0589603A2] An exciter for an internal combustion engine igniter plug (12) comprises a continuous AC charging circuit (20) and a discharge circuit (22). The discharge circuit (22) is connectable to the plug (12) and the charging circuit (20) includes a transformer (T1) having a primary winding connectable to an AC power source (28) and a secondary winding connected to the discharge circuit. The discharge circuit includes a storage capacitor (38) connected to the transformer secondary winding such that current induced in the secondary charges the capacitor (38) at a generally constant rate. A switching device (46) is connected in series between the capacitor (38) and the plug (12). A trigger circuit (52) triggers the switching device (46) in response to charge on the capacitor (38). The charging circuit (20) and trigger circuit (52) operate to maintain a generally constant spark rate. A current multiplier (76) is also provided to substantially increase the peak currents delivered to the plug (12). A clamping diode (150) is also provided in parallel with the storage capacitor (38) to prevent reverse currents and voltages due to resonance between the capacitor (38) and stray inductance. <IMAGE>
IPC 1-7
IPC 8 full level
F02P 3/08 (2006.01); F02P 7/03 (2006.01); F02P 9/00 (2006.01); F02P 11/00 (2006.01); F02P 15/00 (2006.01)
CPC (source: EP)
F02P 3/0838 (2013.01); F02P 3/0884 (2013.01); F02P 7/035 (2013.01); F02P 9/002 (2013.01); F02P 11/00 (2013.01); F02P 15/003 (2013.01)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0589603 A2 19940330; EP 0589603 A3 19950215; EP 0589603 B1 19990519; DE 69324981 D1 19990624
DOCDB simple family (application)
EP 93307213 A 19930914; DE 69324981 T 19930914