Abstract: The present invention relates to a method and a system for correcting references (xref), in the case of flux reduction, used in a speed variator for controlling an electric motor M having a three-phase supply, for example of the synchronous or asynchronous type. This method consists, in particular, of using a dynamic system (MM) representing a model of the motor to be controlled, provided with at least one integrator (Int) and having as input the difference between a limited value of a control voltage (u) to be applied to the motor (M) and the value of a calculated reference voltage (uref).

Abstract: The invention concerns a method for adjusting motor parameters in a variable speed drive intended to control an electric induction motor M. The method includes a step for determining differences ?ID and ?IQ between motor flux current and motor torque current references and measurements, a step for calculating a correction value ?RR of the rotor resistance and a correction value ?LR of the rotor inductance from the integral terms of the differences ?ID and ?IQ, a step for adjusting values of parameters of the motor model based on ?LR and ?RR, a step for generating control voltages UD and UQ to be applied to the motor M using said adjusted motor parameter values.

Abstract: The invention concerns a method for adjusting motor parameters in a variable speed drive intended to control an electric induction motor M. The method includes a step for determining differences ?ID and ?IQ between motor flux current and motor torque current references and measurements, a step for calculating a correction value ?RR of the rotor resistance and a correction value ?LR of the rotor inductance from the integral terms of the differences ?ID and ?IQ, a step for adjusting values of parameters of the motor model based on ?LR and ?RR, a step for generating control voltages UD and UQ to be applied to the motor M using said adjusted motor parameter values.

Abstract: The present invention relates to a method and a system for correcting references (xref), in the case of flux reduction, used in a speed variator for controlling an electric motor M having a three-phase supply, for example of the synchronous or asynchronous type. This method consists, in particular, of using a dynamic system (MM) representing a model of the motor to be controlled, provided with at least one integrator (Int) and having as input the difference between a limited value of a control voltage (u) to be applied to the motor (M) and the value of a calculated reference voltage (uref).