10 research outputs found

    Stochastic post-processing calculation of iron losses – application to a PMSM

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    To take account of the uncertainties introduced on the magnetic properties during the manufacturing process, the present work aims to focus on the stochastic modelling of iron losses in electrical machine stators. The investigated samples are composed of 28 slinky stators, coming from the same production chain. The stochastic modelling approach is first described. Thereafter, the Monte-Carlo sampling method is used to calculate, in post-processing, the iron loss density in a PMSM that is modelled by the finite element method. The interest of such an approach is emphasized by calculating the main statistical characteristics associated to the losses variability, which are Gaussian distributed for A and O formulations. The originality of the approach is due to the fact that the global influence of the manufacturing process (cutting, assembly, 
) on magnetic properties of the considered samples is taken into account in the way of computing the iron losses.This work is supported by the program MEDEE (Nord Pas-de-Calais Region, France

    CONTRIBUTION A LA PRISE EN COMPTE DES PERTES FER DANS LA MODELISATION DES MACHINES ELECTRIQUES PAR ELEMENTS FINIS

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    Taking into account the iron losses in electromechanical machines is a crucial step during the design process. The aim of this study was to validate the implementation of an iron loss model and at the same time perform an accurate modelling of the electrical system. Our choice was to use models at the post-processing stage of a finite element code. Thus, four analytical models were compared for, sinusoidal and non-sinusoidal supply, (without minor cycles) in terms of accuracy, in order to choose the most suitable to be implanted in code_Carmel. We have shown that the inclusion of minor loops can be improved by replacing the classical Steinmetz term by a hysteresis model or by a suitable analytical model. The implementation and the accuracy of the analytical model were evaluated first on simple systems, and also on several rotating machines. Comparison of the simulated results with measurements showed good agreement and demonstrated the ability of the model to estimate the iron losses with good accuracy for a wide range of electrical machines and for different supply (sinusoidal and PWM).La prise en compte des pertes fer dans les machines Ă©lectriques est une Ă©tape cruciale lors du processus de conception. L'objectif de ce travail a donc Ă©tĂ© de valider l'implĂ©mentation d'un modĂšle de pertes fer tout en effectuant une modĂ©lisation prĂ©cise des machines Ă©lectriques Ă©tudiĂ©es. Le choix s'est portĂ© sur l'utilisation de modĂšles de calcul des pertes en post-traitement d'un code par Ă©lĂ©ments finis. Ainsi, diffĂ©rents modĂšles analytiques ont Ă©tĂ© comparĂ©s en rĂ©gime sinusoĂŻdal et non sinusoĂŻdal (sans cycles mineurs) en termes de prĂ©cision, afin de choisir le plus adaptĂ© pour une implantation dans code_Carmel. Par ailleurs, nous avons montrĂ© que la prise en compte des cycles mineurs peut ĂȘtre amĂ©liorĂ©e en remplaçant le terme classique de Steinmetz par un modĂšle d'hystĂ©rĂ©sis ou par un modĂšle analytique adaptĂ©. L'implĂ©mentation et la prĂ©cision du modĂšle analytique ont Ă©tĂ© Ă©valuĂ©es d'abord sur des systĂšmes simples puis sur plusieurs machines tournantes. La comparaison des rĂ©sultats simulĂ©s avec les mesures issues des essais Ă  vide montre une bonne concordance et dĂ©montre la capacitĂ© du modĂšle Ă  estimer les pertes fer avec une bonne prĂ©cision pour une large gamme de machines Ă©lectriques et pour les deux types d'alimentations utilisĂ©s (sinusoĂŻdale et MLI)

    Stochastic post-processing calculation of iron losses – application to a PMSM

    Get PDF
    To take account of the uncertainties introduced on the magnetic properties during the manufacturing process, the present work aims to focus on the stochastic modelling of iron losses in electrical machine stators. The investigated samples are composed of 28 slinky stators, coming from the same production chain. The stochastic modelling approach is first described. Thereafter, the Monte-Carlo sampling method is used to calculate, in post-processing, the iron loss density in a PMSM that is modelled by the finite element method. The interest of such an approach is emphasized by calculating the main statistical characteristics associated to the losses variability, which are Gaussian distributed for A and O formulations. The originality of the approach is due to the fact that the global influence of the manufacturing process (cutting, assembly, 
) on magnetic properties of the considered samples is taken into account in the way of computing the iron losses.This work is supported by the program MEDEE (Nord Pas-de-Calais Region, France

    Contribution à la prise en compte des pertes fer dans la modélisation des machines électriques par éléments finis

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    La prise en compte des pertes fer dans les machines Ă©lectriques est une Ă©tape cruciale lors du processus de conception. L objectif de ce travail a donc Ă©tĂ© de valider l implĂ©mentation d un modĂšle de pertes fer tout en effectuant une modĂ©lisation prĂ©cise des machines Ă©lectriques Ă©tudiĂ©es. Le choix s est portĂ© sur l utilisation de modĂšles de calcul des pertes en post-traitement d un code par Ă©lĂ©ments finis. Ainsi, diffĂ©rents modĂšles analytiques ont Ă©tĂ© comparĂ©s en rĂ©gime sinusoĂŻdal et non sinusoĂŻdal (sans cycles mineurs) en termes de prĂ©cision, afin de choisir le plus adaptĂ© pour une implantation dans code_Carmel. Par ailleurs, nous avons montrĂ© que la prise en compte des cycles mineurs peut ĂȘtre amĂ©liorĂ©e en remplaçant le terme classique de Steinmetz par un modĂšle d hystĂ©rĂ©sis ou par un modĂšle analytique adaptĂ©. L implĂ©mentation et la prĂ©cision du modĂšle analytique ont Ă©tĂ© Ă©valuĂ©es d abord sur des systĂšmes simples puis sur plusieurs machines tournantes. La comparaison des rĂ©sultats simulĂ©s avec les mesures issues des essais Ă  vide montre une bonne concordance et dĂ©montre la capacitĂ© du modĂšle Ă  estimer les pertes fer avec une bonne prĂ©cision pour une large gamme de machines Ă©lectriques et pour les deux types d alimentations utilisĂ©s (sinusoĂŻdale et MLI).Taking into account the iron losses in electromechanical machines is a crucial step during the design process. The aim of this study was to validate the implementation of an iron loss model at the same time performing an accurate modelling of the electrical system. Our choice was to use models in a post-processing stage of a finite element code. Thus, four analytical models were compared for, sinusoidal and non-sinusoidal supply, (without minor cycles) in terms of accuracy, in order to choose the most suitable to be implanted in code_Carmel. We have shown that the inclusion of minor loops can be improved by replacing the classical Steinmetz term by a hysteresis model or by a suitable analytical model. The implementation and the accuracy of the analytical model were evaluated first on simple systems, and after on several rotating machines. Comparing the simulated results with measurements ones showed good agreement and demonstrated the ability of the model to estimate the iron losses with good accuracy for a wide range of electrical machines and for different supply (sinusoidal and PWM).LILLE1-Bib. Electronique (590099901) / SudocSudocFranceF

    Iron Loss Calculation in a Synchronous Generator Using Finite Element Analysis

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