Dynamics of pulse-width-modulated DC motor drive with LC-filter at power input port

International audienceThe paper consists of studying the PWM DC motor drive interaction with LC- input filter at its power input port. A comparison between small-signal modeling results and results of bifurcation analysis is presented. Results of discussion about the possible practical application of criteria derived from small-signal analysis are also presented. In the numerical example of DC traction, motor drive, both qualitative and quantitative results are given to correctly choose input filter parameters

Etude expérimentale et modélisation des vibrations mécaniques des systèmes électromécaniques de conversion d'énergie

International audienceWe present an analysis and modelling approach for technological systems at risk. For this approach's development, an electromechanical energy conversion platform, representative of technological systems at risk, is used on an experimental basis. We then propose an approach for the modelling and analysis of their dynamic behaviours. This approach enables us to develop a sufficiently exact and simple model capable of simulating all the development scenarios of the considered system dynamics. These mathematical models will allow us to develop a support system in the reliable design and diagnosis of EECS.On présente une approche d'analyse et de modélisation des systèmes technologiques à risque. Pour l’élaboration de cette approche, on utilise à titre expérimental une plate-forme électromécanique de conversion d'énergie, représentative des systèmes technologiques à risque. On propose alors une démarche pour la modélisation et l'analyse de leurs comportements dynamiques. Cette démarche permet d'élaborer un modèle suffisamment exact et simple pouvant reproduire en simulation l'ensemble des scénarios de développement des dynamiques du système considéré. Ces modèles mathématiques serviront à élaborer un système d’aide à la conception et au diagnostic fiables des EECS

An identification of pulse system dynamics on the basis of fractal regularity use

International audienceThis paper analyzes the on-line identification problem of the pulse energy conversion system dynamics. One of possible approaches to the problem solution on the dynamics fractal regularity use basis is proposed. The approach is applied to a buck voltage converter with pulse-width modulation of the second kind

Parametric optimization of pulse energy conversion systems on the base of bifurcation approach

International audienceThis paper reports on an approach to parametric optimization of pulse energy conversion systems. The criterion function which enables the system to operate in a given dynamic mode has been formed. The results of parametric optimization of a DC automated electric driven with pulse-width modulation are presented