Circuit arrangement for D.C. chopper convertor-operated D.C. series-wound motors

摘要

The invention relates to a circuit arrangement for D.C. chopper convertor-operated D.C. series-wound motors, which are suitable for the "travel", "network brake" and "network-independent rheostatic brake" operating modes, in which circuit arrangement the armature circuit of the motor is connected in travel mode via a deactivatable main valve to a direct voltage source and the field circuit conducts armature current as part of the freewheel of the armature current in the clock pauses and in which it is possible to switch over from the service brake to the rheostatic brake and means are provided for additionally changing the field within the modes of operation. The invention is based on the combination of the following features: - the field winding (LF) is located in a parallel path between two diodes (V9, V6) which are both poled in the same direction of conduction of an armature freewheel in travel mode parallel to the armature circuit - a first transverse path and a second transverse path which are connected parallel to one another are connected antiparallel to the parallel path, the first transverse path consisting of the series circuit of an on/off valve (V2), a braking resistor (RB) and a diode (V7) and the second transverse path consists of a further on/off valve (V3) - the anodes of the on/off valve of the first transverse path (V2) and of the other on/off valve of the second transverse path (V3) are connected to one another and to the cathode of the first diode (V9) of the parallel path, in addition the cathodes of the diode of the first transverse path (V7) and of the other ... Original abstract incomplete. <IMAGE>