Patent ID: 7521730

Claim:
A thyristor arrangement, comprising: a main thyristor, including a cathode and an anode; at least one auxiliary thyristor, including a cathode and an anode; a resistance device, electrically connecting the cathode of the auxiliary thyristor and the cathode of the main thyristor and defining an ohmic resistance that is different from zero; an anode connection, electrically connecting the anode of the auxiliary thyristor and the anode of the main thyristor; and a triggering device for breakover triggering of the main thyristor via the auxiliary thyristor and the resistance device, wherein the resistance device defines a time-dependent ohmic resistance in such a way that this resistance has a relatively large value during a switch-on phase of the main thyristor and a relatively small value during a current-carrying phase of the main thyristor, wherein the resistance automatically decreases from the relatively large value to the relatively small value, the resistance device has an ohmic resistance of an essentially fixed value and at least one of an inductance and capacitance, the resistance device is a series circuit comprising the ohmic resistance of the essentially fixed value and the inductance or capacitance and the anode connection has a series circuit comprising at least one of an inductance and capacitance and a parallel circuit comprising an ohmic resistance and at least one of a further inductance and capacitance.