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This paper presents the results of a study on the effect of the number of poles of AC induction motors (EVI) on their performance in both propulsion and regenerative brake modes in eco-urban electric cars (EC). Since changing the number of poles affects the maximum motor speed, different transmission ratios are considered in modelling of the powertrain system. Two speed profiles, namely, normal and...
This paper presents an analytical model for predicting the dynamic characteristics of composite wind turbine blades. In this model, the governing equations of motion are derived using Hamiltion's principle and are solved by using extended Galerkin's method. This model is capable of predicting natural frequencies of composite beams with arbitrary single-cell cross sections. For various layup configurations,...
This paper presents an analytical model for predicting the dynamic characteristics of composite wind turbine blades. In this model, the governing equations of motion are derived using Hamiltion's principle and are solved by using extended Galerkin's method. This model is capable of predicting natural frequencies of composite beams with arbitrary single-cell cross sections. For various layup configurations,...
This paper presents a comparative study of the performance of two types of electric motors used in eco-urban electric cars (EC). The power transmission system of an EC is modelled once with a DC permanent magnet (PM) and once with an AC induction motor (IM). In both cases the electric motors can operate in two modes: propulsion mode (motor) and regenerative brake mode (generator). Two standard velocity...
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