Electronic ignition arrangement for arc welder disconnects blocking circuit for defined period for each ignition pulse until thyristor pair activated by same pulse is again in blocking state

摘要

Blocking converter circuit (10) is located between a charging capacitor and an ignition pulse capacitor. Timer circuit (30) driven by a trigger circuit (20) switches off the blocking circuit for a predefined period for each ignition pulse until thyristor pair (A, A'; B, B') activated by the same ignition pulse is again in the blocking state after discharging the ignition pulse capacitor (Ci).