LAOGINDUKTIV ANOD-KATODANSLUTNING FOER EN FRAONKOPPLINGSBAR EFFEKTTYRISTOR.

摘要

A low-inductance anode-cathode R-C circuit for a gate-turn-off power thyristor, including circuit diodes, capacitors and line connections for connecting the R-C circuit to a power thyristor. By reducing the spray inductances of circuit diodes, capacitors and line connections of the turn-off unloading circuit of a table-shaped power thyristor (Th), which can be designed for loads of 2500 V and 1000 A, its additional breaking current can be increased and the pulse-peak voltage of the first steep rise of the anode-cathode voltage across the power thyristor, occurring when it is switched off, can be reduced. R-C circuit diodes, capacitors and, preferably, also the power thyristor, have the same axial component direction, that is to say they are arranged axially parallel or coaxially with respect to each other in a low-induction R-C circuit arrangement. Electrically, these components are connected by means of electrically conductive plates, which essentially extend parallel to each other, and symmetrical, bell-shaped caps or wire connections between the plates and the connecting terminals of the components. In the case of the coaxial arrangement, R-C circuit diodes and capacitors are essentially electrically connected to each other without intermediate line, a coaxial cable being used for the connection to the power thyristor. Several low-inductance R-C circuit diodes and capacitors can be connected in parallel with each other and/or in series.