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The paper presents the aspects regarding FEM analysis of a reluctant motor for direct driving of the light electric vehicles. The reluctant motor take into study is of special construction suitable for direct drive of a light electric vehicle. It is an inverse radial reluctant motor, with a fixed stator mounted on front wheel shaft and an external toothed rotor fixed on the front wheel itself. A short...
A wheel slip controller of an electric vehicle with two independent rear wheel drives is presented. The vehicle dynamic model and the proposed torque controller for the DC motors are also presented. The speed and torque observer solution proportionate the necessary external torque estimation to the anti-slip wheel controller. The wheel slip is based on the comparison of the real vehicle velocity and...
Switched reluctance motors (SR motors) have many advantages such as simple and solid construction, low-cost manufacturing, excellent reliability at high temperatures, and large torque density. However, the higher torque ripple from magnetic saliency is a serious problem preventing its applications from being expanded. To reduce torque ripple, we propose an instantaneous torque control method using...
In this paper, different electric motors are studied and compared to see the benefits of each motor and the one that is more suitable to be used in the electric vehicle (EV) applications. There are five main electric motor types, DC, induction, permanent magnet synchronous, switched reluctance and brushless DC motors are studied. It is concluded that although the induction motors technology is more...
The present paper addresses the study of a new electrically assist scooter. Nowadays, every electrical scooter found in the market works with human action, either by using a throttle handle or pedal, to control the electrical motor speed and no one offers a real assistance. For proper design, the scooter behavior, with different users, has to be analyzed by way of speed measurements. From this, an...
A control scheme for induction motors suitable for electric vehicles is presented. The proposed scheme allows the motor to exploit the maximum torque capability in the whole speed range, shows a weak dependence on the motor parameters and is robust against fast variations of the dc-link voltage. It is based on a control algorithm that decreases the rotor flux as the requested voltage tends to overcome...
A procedure, which helps developing an optimized construction of a 6/4 type SRM, is described in the paper. A multicriterial optimization procedure and an analytical model arising from a reluctance network method is applied. An influence of non-linear properties of magnetic materials is taken into account. Calculations are performed in the Matlab environment. Obtained constructions, initial and optimized...
This paper presents system analysis, modeling and simulation of an electric vehicle with different sensorless control techniques. Indeed, sensorless control is considered to be a lower cost alternative than the position or speed encoder-based control of induction motors for an electric vehicle. Two popular sensorless control methods, namely, the Luenberger observer and the Kalman filter methods are...
Electric vehicles (EVs), due to its lack of local gas emissions, silent driving and much higher efficiency than internal combustion engine vehicles, are fundamental for the world's sustainable mobility. The efficiency and response of the powertrain, namely of the electric motor (EM), are very important aspects on the correct sizing and project of an electric (or hybrid) vehicle. The mobility problem...
In modern vehicles, the integrated starter-alternator (ISA) is an electrical machine that has to crank up the internal combustion engine, and to generate electric power during normal driving. Therefore, the ISA has to exhibit high torque and a wide constant-power speed range. This paper reports some design criteria, analysis and test results of an ISA that has been developed using a fractional-slot...
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