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Generally, accurate modelling of electrical machines requires the use of finite-element method. However, FE analysis is too time consuming, especially at firsts design stages, from the point of view of engineers working in R&D departments in the electrical machine industry. To reduce pre-design stages duration, analytical models are often preferred. Two(More)
—In this paper, the suitability of a class of electric machines for vehicle traction applications is discussed. These machines, which are known as hybrid excitation synchronous machines , combine permanent-magnet (PM) excitation with wound field excitation. The goal behind the principle of hybrid excitation is to combine the advantages of PM excited(More)
The aim of this paper is to present a method and a tool to extract the full set of information from an animated character designed in Maya (animatable body only). The Maya plug-in generates the appropriate data as specified in the MPEG-4 FBA standard [2]. The result is composed of three different data sets: the BDP (Body Definition Parameters) describing(More)
This paper presents a description, operating principle and experimental study of two hybrid excitation synchronous machines in motor and generator modes. These machines combine two flux sources: permanent magnets, located in the rotor, and field coils, located in the stator avoiding sliding contacts. Thanks to this particular configuration the air gap flux(More)
This paper describes the state of the art of hybrid excitation synchronous machines. Different hybrid excited synchronous structures from scientific and technical literature are described and analysed. Advantages and drawbacks of the different structures are discussed. Different method of classification of these structures will also be discussed. The(More)
In this work we present two approaches to improve the " Collision Avoidance " mechanism of the Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) protocol. Our first approach : the " Uniform Law with Doubling Interval CSMA/CA (ULDI_CSMA/CA) " uses a uniform law in an interval of values I=[a, b] to calculate the random starting time when(More)
Virtual cameras motion is crucial to properly lay out virtual scenarios on the screen. Despite the wide range of camera path planners, none have yet reached realism. In this work, we propose a novel camera path planning algorithm that generates accurate camera attributes continuously in time. Based on a set of known viewpoints, our solution computes a(More)