SPANNUNGSUMSETZUNGSVORRICHTUNG FUER EINEN GLEICHSPANNUNGSVERBRAUCHER

摘要

In a converter 1 for a d.c. voltage consumer 2 supplied via a single or multi-phase a.c. voltage source 3, between the a.c. voltage source 3 and the d.c. voltage consumer 2 is arranged a rectifier 5 and an intermediate circuit 6 for controlling the voltage in the d.c. voltage consumer 2. The intermediate circuit 6 is associated with a control device 29. The control device 29 is connected at the input of the d.c. voltage consumer 2 with external voltage and/or current adjusting or monitoring devices. The output of the control device 29 is applied to a control input of a switching device 24. The switching device 24 is arranged between an electric energy store 26 and a magnetic energy store 19 and the intermediate circuit 6 is provided between the energy storage element 26 and the magnetic energy store 19. The switching device 24 may be a bipolar transistor (46, Fig 5), two devices (24, 56 Fig 6), GTO thyristors (97-99, Figs 12 and 16), IGBT (Figs 13, 14, 17 and 20). The d.c. voltage consumer 2 may be used for welding 33, 34. <IMAGE>