Device for coupling energy storage devices to a voltage intermediate circuit of a traction converter

摘要

Device (56) for coupling energy accumulators (66, 68) to a voltage intermediate circuit (18) of a traction converter, which has a feed circuit, a voltage intermediate capacitor (26) and a load-side self-commutated converter (38), said device (56) having two bridge branches ( 58, 60) each having two switchable semiconductor switches (T9, T10, T11, T12) connected in series and two inductors (62, 64), wherein in each case one bridge branch (58, 60) electrically parallelizes an energy store (66, 68) wherein each bridge branch (58, 60) is connected to a terminal (70, 74) with a positive or negative bus bar (16, 20) of the voltage intermediate circuit (18) and to another terminal (72, 76) by means of a choke (64 , 62) is electrically connected to a connection point (80, 78) of two turn-off semiconductor switches (T11, T12, T09, T10) of the other bridge branch (60, 58).