Circuit arrangement for control of an alternating current motor, comprising - two converter modules (5, 6) with the same number of half-bridges, wherein the number of half-bridges of a converter module (5, 6) is at least as great as the number of phases of the alternating current motor, - a number of bridge interphase transformers (14.1, 14.2, 14.3) matching the number of half-bridges in a converter module (5, 6), - a control unit for the converter modules (5, 6), - a first series module for the alternating current motor, wherein - each half-bridge has a pair of current direction-dependent switch units, controllable by means of the control unit, each comprising an input and an output, the output of a first switch unit of each pair being linked to the input of the second switch unit of the same pair, - in each case, a half-bridge of a first converter module and a corresponding half-bridge of the second converter module are connected by means of a bridge interphase transformer (14.1, 14.2, 14.3) connected between the two half-bridges to a full bridge, - each bridge interphase transformer (14.1, 14.2, 14.3) has a centre tap which can be connected via the first series module to the alternating current motor, - the first series module comprises an alternating current filter, by means of which the centre taps of the bridge interphase transformers (14.1, 14.2, 14.3) can each be coupled to a phase of the alternating current motor, characterised in that the circuit arrangement is configured for elective control of an alternating current motor or a direct current motor, wherein the circuit arrangement comprises a second series module for the direct current motor, wherein the centre tap of each bridge interphase transformer (14.1, 14.2, 14.3) can optionally be connected via the first series module to the alternating current motor, or via the second series module to the direct current motor, wherein the second series module comprises at least one additional interphase transformer with a centre tap which can be coupled to the direct current motor and two outer terminals (21.1, 21.2), each connectable to a centre tap of a bridge interphase transformer (14.1, 14.2, 14.3). - two converter modules (5, 6) with the same number of half-bridges, wherein the number of half-bridges of a converter module (5, 6) is at least as great as the number of phases of the alternating current motor, - a number of bridge interphase transformers (14.1, 14.2, 14.3) matching the number of half-bridges in a converter module (5, 6), - a control unit for the converter modules (5, 6), - a first series module for the alternating current motor, - each half-bridge has a pair of current direction-dependent switch units, controllable by means of the control unit, each comprising an input and an output, the output of a first switch unit of each pair being linked to the input of the second switch unit of the same pair, - in each case, a half-bridge of a first converter module and a corresponding half-bridge of the second converter module are connected by means of a bridge interphase transformer (14.1, 14.2, 14.3) connected between the two half-bridges to a full bridge, - each bridge interphase transformer (14.1, 14.2, 14.3) has a centre tap which can be connected via the first series module to the alternating current motor, - the first series module comprises an alternating current filter, by means of which the centre taps of the bridge interphase transformers (14.1, 14.2, 14.3) can each be coupled to a phase of the alternating current motor, characterised in that the circuit arrangement is configured for elective control of an alternating current motor or a direct current motor, wherein the circuit arrangement comprises a second series module for the direct current motor, wherein the centre tap of each bridge interphase transformer (14.1, 14.2, 14.3) can optionally be connected via the first series module to the alternating current motor, or via the second series module to the direct current motor,