method and device for bringing together at least two together and aligning an or link verbindender biegeschlaffer werkstücklagen

摘要

The invention relates to a switch-off circuit (8) of a control circuit (2) for a gate-controlled semiconductor (4) in which the switch-off circuit (8) has a controllable capacitor bank (12) and a control circuit inductance (LG?). According to the invention, the controllable capacitor bank (12) has a freewheel branch (24) and at the output terminals (G, K) of the switch-off circuit is a series circuit (18) consisting of a decoupling diode (20) and a further capacitor bank (22) connected electrically in parallel whereby the controllable capacitor bank (12) is switched off after the start of the quenching process of the gate-controlled semiconductor (4) and the other controllable capacitor bank (22) is switched on as soon as the gate voltage (UG?) exceeds a predetermined negative threshold voltage. This gives a switch-off circuit (8) whose capacitor voltage (UK1?) is substantially higher so that heavier and steep gate currents (IG?) are generated and the effect of parasitic series resistances is reduced.