Patent ID: 9030142
Filing Date: 2015-05-12
Classification: B62D,H02P

Abstract:
1. A device for operating a circuit arrangement for an electrical machine which comprises a plurality of stator windings, with each stator winding comprising at least a first winding phase and a second winding phase, with the circuit arrangement comprising at least a prespecified first and a prespecified second selection of in each case a plurality of half-bridges, with each half-bridge having a first switching element and a second switching element which is coupled to said first switching element electrically in series, a capability for a common connection of the two switching elements of the respective half-bridge of the first selection to be electrically coupled in each case to a connection of the first winding phase of the respective associated stator winding, and within each case different stator windings being associated with the half-bridges of the first selection, and a capability for a common connection of the two switching elements of the respective half-bridge of the second selection to be electrically coupled in each case to a connection of the second winding phase of the respective associated stator winding, and within each case different stator windings being associated with the half-bridges of the second selection, the device comprising: a detector configured to detect an error in a switching element either of the first or second selection, a braking torque resulting on the rotor from said error at least during a rotation of a rotor of the electrical machine, and a driver configured to drive at least one error-free switching element of the respectively error-free selection as a function of the detection of the error in such a way that a prespecified compensation current is supplied at least to an associated winding phase in such a way that this results in an associated countertorque which counteracts the braking torque.