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

摘要

The method involves determining a correction value (xc) of flux and current references (xref) when a calculated reference voltage (uref) has a value greater than a limited value of a control voltage (u). The value (xc) 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 (uref) 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.