Abstract: A device and method for controlling a bidirectional charger including a bidirectional AC-DC converter connected by a DC bus to a bidirectional DC-DC converter, the charger being connected both to an electric battery and to an AC electrical network, the charger being designed to operate by charging and discharging the battery. An electrical system that includes the bidirectional charger, and also an electric motor vehicle that includes the electrical system.

Abstract: A device estimates the electromagnetic torque of a three-phase synchronous electric machine including permanent magnets. The device includes: a first flux estimator including two integrators of electromotive force for estimating the respective components of the flux in a fixed two-phase coordinate system tied to the stator, an estimator for estimating the torque from the respective estimated-flux components, a second flux estimator that uses currents expressed in a rotating two-phase coordinate system tied to the rotor, with an observer for determining variables that characterize magnetic uncertainties of the machine with a view to correcting the flux estimation of the second estimator, and a detector for generating a signal for resetting initial flux conditions of the two integrators based on the flux estimation delivered by the second estimator, when the discrepancy between the estimated torque and a setpoint torque is higher than a predefined threshold.

Abstract: A device estimates the electromagnetic torque of a three-phase synchronous electric machine including permanent magnets. The device includes: a first flux estimator including two integrators of electromotive force for estimating the respective components of the flux in a fixed two-phase coordinate system tied to the stator, an estimator for estimating the torque from the respective estimated-flux components, a second flux estimator that uses currents expressed in a rotating two-phase coordinate system tied to the rotor, with an observer for determining variables that characterize magnetic uncertainties of the machine with a view to correcting the flux estimation of the second estimator, and a detector for generating a signal for resetting initial flux conditions of the two integrators based on the flux estimation delivered by the second estimator, when the discrepancy between the estimated torque and a setpoint torque is higher than a predefined threshold.