A Fault-Tolerant Control Architecture for Induction Motor Drives in Automotive Applications

International audienceThis paper describes a fault-tolerant control system for a high-performance induction motor drive that propels an electrical vehicle (EV) or hybrid electric vehicle (HEV). In the proposed control scheme, the developed system takes into account the controller transition smoothness in the event of sensor failure. Moreover, due to the EV or HEV requirements for sensorless operations, a practical sensorless control scheme is developed and used within the proposed fault-tolerant control system. This requires the presence of an adaptive flux observer. The speed estimator is based on the approximation of the magnetic characteristic slope of the induction motor to the mutual inductance value. Simulation results, in terms of speed and torque responses, show the effectiveness of the proposed approach

A Practical Scheme for Induction Motor Speed Sensorless Field Oriented Control

International audienceThis paper deals with a practical scheme of induction motor drive speed sensorless control. It requires the presence of an adaptive flux observer. The speed estimator is based on the induction motor magnetic characteristic slope approximation to the mutual inductance value. Encouraging simulation results have been obtained

SPEED SENSORLESS VECTOR CONTROL OF INDUCTION MOTOR USING ONLINE NEURAL VOLTAGE-CURRENT PHASE DIFFERENCE ESTIMATION

International audienceThis paper aims to describe a speed sensorless control of induction motor (IM) based on a new neural network estimator of the rotor speed. This method is based on the extraction of the rotor speed information from the command frequency and the phase difference between stator current and voltage. The data used to train the artificial neural network (ANN) are obtained from steady state equivalent circuit of the induction motor simulated for various frequency. The experimental results show the efficiency of the proposed speed estimation technique at high speed and at very low speed