Method and system for controlling an electric motor in the event of flux reduction

摘要

The method involves determining a correction value (x c) of flux and current references (x ref) when a calculated reference voltage (u ref) has a value greater than a limited value of a control voltage (u). The value (x c) is applied to the references and calculated by a dynamic system (MM) representing a model of a three-phase electric motor (M) to be controlled. The system is equipped with integrators, where a difference between the limited value to be applied to the motor and the value (u ref) is applied in an input of the system. An independent claim is also included for a control system utilized in a speed variator for a three-phase electric motor.