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This paper deals with a robust input-output feedback linearization control technique for induction motors. The idea arises from the observation that classic feedback linearization suffers primarily from two disadvantages: the accuracy of the dynamic model and the corresponding correct knowledge of the model parameters. To cope with the limit of the feedback linearization control, intrinsically connected...
This paper proposes the theoretical framework and the experimental application of the active disturbance rejection control to linear induction motors. Such a non-linear control technique can be viewed as a particular kind of input-output linearization control technique, where the non-linear transformation of the state is not a priori given by a model, while it is estimated on-line. Such an approach...
This paper proposes an efficiency analysis on an inverter-fed induction motor drive integrating switching losses minimization by D-PWM (Discontinuous PWM) and an ELMT (Electric Loss Minimization Technique) for the motor, either separately or contemporary. This approach allows to benchmark the contribution of both the chosen PWM and ELMT strategies on the total losses. The aim is the development of...
This paper proposes a technique for the off-line estimation of the electrical parameters of the equivalent circuit of an Induction Machines (IM), and focuses on the application of an algorithm based on the minimization of a suitable cost function involving the differences between the measured stator current direct (sD) and quadrature (sQ) components and the corresponding estimated by the IM state...
This paper proposes the theoretical framework and the consequent application of the input-output feedback linearization (FL) control technique to linear induction motors (LIM). LIM, additionally to RIM, presents other strong non-linearities caused by the dynamic end effects, leading to a space-vector dynamic model with time-varying inductance and resistance terms and a braking force term. This paper,...
This paper proposes a speed observer for linear induction motors which is composed of two parts: 1) a Kalman filter (KF for the on-line estimation of the machine state variables (inductor currents and induced part flux linkage components), 2) a speed estimator based on the total least-squares (TLS) EXIN neuron. The TLS estimator receives as inputs the state variables, as estimated by the KF, and provides...
This paper proposes a technique for the estimation of the electrical parameters of the equivalent circuit of LIMs, taking into consideration the end effects, and focuses on the application of an algorithm based on the minimization of a suitable cost function. It proposes also a set of tests to be made in order to estimate the variation of the magnetic parameters of the LIM versus the magnetizing current...
This paper deals with induction machines analysis by finite-element analysis (FEA) for position sensorless control drives based on rotating voltage carrier injection. In details, it focuses the analysis of the supply conditions of the machine, both the high-frequency rotating voltage carrier and the fundamental frequency supply, for the optimal detection of the rotor slotting saliency effects. With...
This paper deals with induction machines analysis by finite element analysis (FEA) for position sensorless control drives based on rotating voltage carrier injection. In details, it focuses the analysis of the supply conditions of the machine, both the high frequency rotating voltage carrier and the fundamental frequency supply, for the optimal detection of the rotor slotting saliency effects. With...
This paper deals with modeling of induction machines and in particular of its slotting effects. It is a further improvement of former papers dealing with dynamic modelling of the induction machine including stator and rotor slotting effects. Starting from a previously developed space-vector dynamic model of the induction machine including rotor slotting effects, this work improves the analysis developing...
This paper presents a study concerning the vibrations generated by an induction motor drive controlled by field oriented control algorithm (FOC). The aim of the study is to identify suitable measurement points and analysis techniques in order to achieve information about vibration generated by an electric drive. Vibrations take origin both by the torque generated by the motor and the motor supply...
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