Abstract: A cascaded controller for controlling a kinetic three-phase synchronous machine comprises a current control circuitry and an active power control circuitry operatively coupled with the current controller circuitry. The current control circuitry is configured to regulate a magnitude of inrush stator current for a stator of the kinetic three-phase synchronous machine by producing a first voltage control signal causing a flow of active power in the kinetic three-phase synchronous machine. The active power control circuitry is configured to produce a second voltage control signal to reduce the active power to zero, based on the first voltage control signal. The second voltage control signal controls a phase angle of the inrush stator current such that the stator current vector is oriented to align with a magnet axis of the rotor.

Abstract: A method and a device inject a high frequency current vector which has a fixed angle with the measured current vector flowing in the machine. The method: measures the motor current vector, determines a projection value of the motor current on an axis that is orthogonal to a direction having the fixed angle with the measured current vector, demodulates the high frequency variations of the projection value using a first high frequency demodulation signal, determines at least a first angle from the demodulated high frequency variation, determines the injection voltage vector at least from the first angle, a predetermined voltage and a second high frequency modulating signal, the second high frequency modulating signal having the same frequency as the first high frequency demodulating signal and a phase difference with the first high frequency demodulating signal that is equal to ?/2.

Abstract: The present invention concerns a device and a method for controlling a motor using a maximum torque per ampere field module and a direct flux vector control module. The invention: —determines by the direct flux vector control module reference voltages in a ft framework, —drives the motor with the summed voltages, —measures a motor current vector, —determines a high frequency injection voltage so that the high frequency current response of the motor to the high frequency injection voltages is perpendicular to the measured motor current vector, —determines an estimated flux from the measured motor currents and the voltage references, —determines, from the estimated flux and the high frequency sinewave signal, the reference flux so that the high frequency flux response to the injected voltage is aligned with the measured current vector.

Abstract: The present disclosure discloses a controller and a method for controlling an electric motor. The controller comprises a feedback controller configured to generate a reference voltage vector, a hybrid flux observer configured to estimate a flux error vector based on a difference between a first stator flux linkage observed and a second stator flux linkage, and a position observer configured to estimate a position of a rotor of the electric motor based on a projection of the flux error vector in a direction orthogonal to a direction of a voltage error vector shifted with a phase of dynamics of the hybrid flux observer. The controller further comprises a state estimator configured to estimate a value of a state of operation of the electric motor based on the estimated position of the rotor, thereby closing a feedback control loop of the feedback controller.

Abstract: The present invention concerns a method and a device for controlling a three-phase motor using a field oriented control system. The invention: —estimates, in a dq plane incremental inductances (I) and (II) of the motor, —determines an incremental saliency (III) of the motor as a ratio between the incremental inductance (I) and the incremental inductance (II), —estimates a first current id* from the estimated incremental saliency (III) and a reference incremental saliency ISR*, —estimates the rotor speed value (IV) of the motor, —estimates a second current iq* from a reference rotor speed value ?*, and the estimated rotor speed value (IV), —controls the voltage applied to the motor according to the first and second estimated currents.