METHOD FOR OPERATING AN ELECTRICAL MACHINE AND DEVICE FOR CARRYING OUT SAID METHOD

摘要

The invention relates to a method for operating an electrical machine, especially a separately excited synchronous machine having an additional squirrel cage. The electrical machine comprises a rotor which is mobile relative to a stator winding, especially a rotatably mounted rotor, the rotor especially having an excitation winding and/or a squirrel cage. A unit supplying the electrical machine and especially having an inverter controlled by an electronic control unit, provides a stator voltage space vector and determines a stator current space vector. The stator current space vector so determined is controlled towards a rated value when the rotor is below a critical speed, especially the rate of the stator current space vector determined is controlled towards a rated value for the rate and the direction and/or speed of the stator current space vector is controlled towards a corresponding rated value for the direction and/or speed.