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Spécial : Ces thèses qui changent la vie
Contributions to improving permanent magnet, direct current,
motors for high-power automobile propulsion applications
Spécial : Ces thèses qui changent la
vie
Les docteurs sont aujourd’hui reconnus pour apporter à l’entreprise
des compétences d’innovation certaines. L’ UTC a choisi de
présenter en format textes, vidéos et photos humoristiques des
thèses qui ont donné des applications très bénéfiques à notre vie
quotidienne. Entreprises, que ces thèses vous inspirent pour
donner votre confiance aux docteurs comme les recruteurs le font
partout dans le monde !
14 Mar 2016
Summary
Développement d'un modèle analytique pour le calcul de la
matrice de diffusion d'un tronçon composé de tubes HerschelQuincke
Technologies de l’information et des systèmes : sécurité et
économie d’énergie dans les capteurs sans fil
Estimation des chaines semi-markoviennes et des chaines
semi-markoviennes cachées
Etude de méthodes ensemblistes robustes pour une
localisation multi sensorielle intègre
Design et appropriation d'un dispositif d'interactions haptiques
Contributions to improving permanent magnet, direct current,
motors for high-power automobile propulsion applications
Contributions to improving permanent
magnet, direct current, motors for highpower automobile propulsion
applicationsà aimants permanents dans
des applications automobiles à forts
courants
All and any solutions that help lower fuel consumption are welcome.
Switching off a combustion engine at a red traffic lights (even if only
for a minute) is good for your purse and for the planet in terms of
greenhouse gas effects. To avoid tiresome manual switching on/off
moves with the starter motor, we saw the advent a few years back
of “stop-and-go” systems.
“If you equip high quality urban cars with a stop and go system, the
combustion engine can be restarted via the alternator”, explains
Aurélien Vauquelin. This offered a first technological breakthrough,
potentially allowing 100 000 re-starts (compared with previous
standard 10 000 starts). “But this choice of using the alternator to
provide the start torque calls for the use of expensive electronic
components”. For automobile equipment makers, the challenge
therefore consisted of attaining the same performance level using a
less expensive technique.
Aurélien Vauquelin graduated from UTC with the major Mechanical
Engineering and then did a CIFRE thesis with the equipment
company Valeo, on having the starter used rather than the
alternator. “This system, called Restart, will enable 300 000 restart
sequences in the life expectancy of a car, which comes down to
once per kilometre”. Another constraint is that you must be able to
restart the engine is less than ½ second. “Technically speaking, we
were seeking a high power impulse”. In short, this implies emptying
the battery in a minimum time lapse without seeing the starter burst
into flames!
With the help of UTC-LEC (Laboratoire Electromécanique de
Compiegne) where the first stop-and-go® system was developed,
Aurélien Vauquelin has added improvements to the system in the
course of his PhD work. This starter is now in service and costs 5
times less that the alternator solution and leads to fuel-saving off
between 10-15% per urban trip.
“The technologies developed round the concept of high power
impulses could be used for electric vehicles”.