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Electric motors required by electric vehicles must be effective, efficient and economical. The accelerated development of power electronics and speed control with frequency converters allows the use of adjustable speed systems within a wide range. From a study of specialized literature, different types of synchronous motors without rotor windings were compared in this paper for these vehicles. Comparative assessments were made, based on momentum and power, losses and efficiency, power factor, costs and other characteristics of synchronous permanent-magnet motors, synchronous reluctance motors and synchronous reluctance motors assisted by permanent magnets. This allowed assessing the best technical-economic variant. It was shown that the last one, using ferrite magnets, ensures the lowest cost, with high absolute values and density of momentum and power, high efficiency and high power factor. [ABSTRACT FROM AUTHOR]

The measure of the instant angular position of the rotor is integral part of the control of Switching Reluctance Motors drivers. The direct measurement of this variable adds complexity and cost to the system and it doesn't give good results sometimes. That has motivated the development and test of algorithms for estimating the rotor angular position of the motor. In this work is presented the use of an Unscented Kalman Filter for estimating the speed and rotor angular position of the motor MFR 132.5, based on a grey box model of the motor which is also presented in this work. The results show that this kind of estimator gives good estimations of the state of the motor, as well during the starting as during the regular operation, even under the presence of perturbations of the load torque and errors in the initial estimation of the angular position. [ABSTRACT FROM AUTHOR]

This paper presents the theoretical basis that models the behavior of The switched reluctance machines and their drives. The general characteristics, the differential equation system that constitutes the mathematical model of the motor and the Simulink's blocks, which have been built for running the simulation, are outlined. The results of the simulation have been shown and compared with those obtained experimentally. The Simulink model is used for studying the Switched Reluctance motor drive behavior under some operation conditions and theoretical explanations for the simulation's results are given in every case. [ABSTRACT FROM AUTHOR]