Abstract: The invention relates to a circuit arrangement for the selective operation of at least two electric machines (1, 2) that are each supplied via a plurality of phase lines, comprising:—one voltage protection module (5) for limiting an intermediate circuit voltage,—one switch arrangement (4) for selecting one of the electric machines by switching the phase lines;—first choke inductivities (8) in each of the plurality of phase lines between the circuit arrangement (4) and the voltage protection module (5), wherein one second choke inductivity (9?) each may be switched parallel to one or more first choke inductivities (8) as a function of the selected electric machine (1, 2), can be switched.

Abstract: The invention relates to a circuit arrangement for the selective operation of at least two electric machines (1, 2) that are each supplied via a plurality of phase lines, comprising:—one voltage protection module (5) for limiting an intermediate circuit voltage,—one switch arrangement (4) for selecting one of the electric machines by switching the phase lines;—first choke inductivities (8) in each of the plurality of phase lines between the circuit arrangement (4) and the voltage protection module (5), wherein one second choke inductivity (9?) each may be switched parallel to one or more first choke inductivities (8) as a function of the selected electric machine (1, 2), can be switched.

Abstract: A drive control system for a multiphase motor powered by a power converter of a type including a multi-pulsed bridge circuit with a plurality of controllable converter valves and a same number of electrically isolating devices, includes a control unit, with the input side of the converter valves connected to the output side of the control unit via the electrically isolating devices, and an armature short-circuit braking device for connection to the input side of electrically isolating devices of one bridge side of the bridge circuit. An overvoltage recognition device is provided to receive a signal commensurate with a limit value, and a signal commensurate with a determined actual input voltage of the power converter. A trigger circuit is connected to the armature short-circuit braking device, and has an input connected to an output of the overvoltage recognition device and supplied with a signal for the armature short-circuit braking device.

Abstract: A drive control system for a multiphase motor powered by a power converter of a type including a multi-pulsed bridge circuit with a plurality of controllable converter valves and a same number of electrically isolating devices, includes a control unit, with the input side of the converter valves connected to the output side of the control unit via the electrically isolating devices, and an armature short-circuit braking device for connection to the input side of electrically isolating devices of one bridge side of the bridge circuit. An overvoltage recognition device is provided to receive a signal commensurate with a limit value, and a signal commensurate with a determined actual input voltage of the power converter. A trigger circuit is connected to the armature short-circuit braking device, and has an input connected to an output of the overvoltage recognition device and supplied with a signal for the armature short-circuit braking device.