Active short-circuit is a standard emergency procedure applied to three-phase permanent-magnet synchronous machine drives in battery-electric and hybrid electric drivetrains to comply with stringent automotive safety standards, such as the ISO 26262. Unfortunately, the ensuing torque and current transients can harm the passengers and the driveline ...
Wound field synchronous machines are gaining attention as an interesting permanent magnet-free alternative for propulsion applications. The third degree of freedom introduced by the rotor current makes the electromagnetic design of these machines not trivial. Hence, dedicated and fast analysis tools are necessary to predict the machine behavior. Th...
This work proposes a hybrid permanent magnet material based synchronous machine design, combining the advantages of rare-earth free iron nitride magnets with rare earth magnets. The primary goal of the work is to propose a solution for automotive applications for a passenger car vehicle, capable of reaching the required performance and withstanding...
Dans le contexte de la transition énergétique et de l'électrification des usages, l'amélioration des performances des actionneurs électromagnétiques passe obligatoirement par des processus d'optimisation du dimensionnement. De telles méthodologies ont d'ores et déjà été mises en place, mais se focalisent principalement sur des géométries préalablem...
The electrification of civil aviation poses many challenges related to high power density and efficiency issues. The IMOTHEP “Investigation and Maturation of Technologies for Hybrid Electric Propulsion” project aims to estimate the potential of hybrid electric propulsion to reduce the fuel consumption and CO2 emissions. HTS wires achieved great per...
In a relentless desire to continuously improve the performance of electric actuators, topological optimal design methods present interesting possibilities. In particular, this work applies an optimization approach of material distribution in order to define new configurations of material arrangements (air, steel, copper) for internal parts of machi...
The three-phase symmetric short-circuit is a reference fault condition for the qualification of a newly designed permanent magnet (PM) synchronous machine against the risk of irreversible demagnetization. To date, the accurate determination of the peak transient short-circuit current condition requires coupled circuital and transient Finite Element...
The purpose of this paper is to carry out an alternative to the present transient models for field wound synchronous machines, which is able to take into account the nonlinearity of the magnetic materials as well as the cross-magnetization. After presenting the principal model structures according to the state variables, a model based on two lookup...
Face aux défis climatiques et aux contraintes environnementales liées aux énergies fossiles, de plus en plus de pays ont fait le pari des énergies renouvelables (EnR), essentiellement de types intermittents comme l’éolien ou le solaire. Cependant l’intégration de ces sources d’énergies au réseau n’est pas sans conséquence et pose de réels défis. En...
In a relentless desire to continuously improve the performance of electric actuators, “non-parametric” optimal design approaches present interesting possibilities. In particular, these works apply the optimization method by material distribution in order to define internal configurations (here rotor) of material arrangements (air, iron, copper and ...
