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Maloberti O.,CNRS Electrical Engineering Laboratory of Paris | Krebs G.,CNRS Electrical Engineering Laboratory of Paris | Marchand C.,CNRS Electrical Engineering Laboratory of Paris | Condamin D.,Leroy Somer | And 2 more authors.
European Journal of Electrical Engineering | Year: 2011

This paper deals with Axial Flux Permanent magnets Machine (AFPM) for hybrid electric vehicles and the sizing of one of those. The two first parts (Sections 1 and 2) draw the academic and industrial context up with a short and summed up state of the art. The third section (Section 3) is dedicated to a geometrical modelling compatible with axial structures and conception needs. In the fourth and fifth sections (Sections 4 and 5), the magnetic and thermal modellings of one prototype are built and simulated thanks to three different methods. Before the end (Section 6), calculations are compared to each other, to an accurate finite element analysis and finally to experimental results. The aim is to propose an optimal design with the help of gradual sizing methods. Outlooks are discussed in the conclusion (Section 7). © 2011 Lavoisier, Paris. Source


Vogt J.-B.,CNRS Materials and Transformations Unit of UMET | Bouquerel J.,CNRS Materials and Transformations Unit of UMET | Leaux F.,CNRS Materials and Transformations Unit of UMET | Palleschi F.,VALEO Systemes Electriques
Procedia Engineering | Year: 2013

Components of new car alternators are subjected fatigue damage due to the start-stop cycles. Predicting their fatigue life still requires needs an experimental validation. Hence, identification of both monotonic and cyclic behaviour is required to integrate the right values in the models. Therefore a precise analysis of the dislocation arrangement produced by cyclic plasticty appears as a fatigue damage indicator. Here SEM-EBSD provide two plasticity markers: the Kernel Average Misorientation and the Low Angel Grain Boundaries that characterize dislocations arrangements in a quantitative way. Based on these indexes, the comparison between lab fatigue specimens and component gives an estimation of the local cyclic plastic strain. © 2013 The Authors. Published by Elsevier Ltd. Source


Mac D.H.,L2EP Art et Me tiers Paris Technology | CleNet S.,L2EP Art et Me tiers Paris Technology | Mipo J.C.,VALEO Systemes Electriques
IET Science, Measurement and Technology | Year: 2012

Methods are now available to solve numerically electromagnetic problems with uncertain input data (behaviour law or geometry). The stochastic approach consists in modelling uncertain data using random variables. Discontinuities on the magnetic field distribution in the stochastic dimension can arise in a problem with uncertainties on the geometry. The basis functions (polynomial chaos) usually used to approximate the unknown fields in the random dimensions are no longer suited. One possibility proposed in the literature is to introduce additional functions (enrichment function) to tackle the problem of discontinuity. In this study, the authors focus on the method of random mappings they show that in this case the discontinuity are naturally taken into account that no enrichment function needs to be added. © 2012 The Institution of Engineering Technology. Source


Mac D.H.,Arts et Metiers ParisTech | Clenet S.,Arts et Metiers ParisTech | Mipo J.C.,VALEO Systemes Electriques
Digests of the 2010 14th Biennial IEEE Conference on Electromagnetic Field Computation, CEFC 2010 | Year: 2010

A method to solve stochastic partial differential equations in random domains consists in using a one to one random mapping function which transforms a deterministic domain into this random domain. The question is now how to determine this random mapping. This paper addresses two methods, one based on the solution of a Laplace equation and one based on a geometric transformation method. An electrokinetic example is presented to compare both methods. © 2010 IEEE. Source


Liu S.,Arts et Metiers ParisTech | Clenet S.,Arts et Metiers ParisTech | Coorevits T.,Arts et Metiers ParisTech | Mipo J.C.,VALEO Systemes Electriques
2014 17th International Conference on Electrical Machines and Systems, ICEMS 2014 | Year: 2015

Imperfections of the manufacturing process can modify the shape of the electrical machine parts which dimensions are then not equal to the nominal ones. In this communication, the influence of three types of stator deformation is studied in the case of a synchronous claw pole machine with a non linear 3D finite element model accounting for the movement. © 2014 IEEE. Source

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