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Logo Faculté des Sciences et Techniques Le MansLogo Faculté des Sciences et Techniques  Le Mans
MA SCOLARITÉMA SCOLARITÉMA SCOLARITÉ
ACTUALITÉSACTUALITÉSACTUALITÉS

Electrodynamic motors

Présentation

1. Basics of magnetism

(a)    Magnetic field (demonstration of magnetic field, sources of magnetic field, mathematical representation of magnetic field)

(b)    Electromagnetism: the phenomena associated with electric and magnetic fields and their interactions with each other and with electric charges and currents.

(c)    Magnetic materials (Magnetic moment, Atomic origin of magnetism, Magnetic material model: Amperian model, Magnetization and magnetic fields quantities, Reaction of magnetic materials submitted to an external magnetic field: Susceptibility and permeability, demagnetizing field)

(d)    Ferromagnetic materials (Classification of magnetic materials: diamagnetic, paramagnetic and ferromagnetic. Domain structure, Magnetization process: hysteresis loop, Soft and hard ferromagnetic materials, Design of permanent magnet: load line and, working point, Evershed’s criterion)

 

2. Application of magnetism to loudspeaker motor design

(a)    Part 1: magnetostatics (Recap of magnetic materials characteristics, Loudspeaker motor structure, Circuit analogy, From Maxwell’s equations to design principles, Exam- ples)

(b)    Part 2: voice coil design (Parameters in voice coil design, Goals and constraints, Worked example)

 

3. 2D FEM modelling of motors (with free software FEMM)

Objectifs

  • Know the basics of magnetism
  • Know the physics of an electrodynamic motor
  • Be able to model an electrodynamic motor using a FEM software

Examens

MCQ + practical exam - 2 hours - no documents allowed

Informations complémentaires

Literature References

 

  • Magnetism I & II, E. du Tre´ molet de Lacheisserie, PUG, 1999 (in French)
  • Introduction to solid state physics, Ch. Kittel, Wiley, 2004
  • Solid state physics , N. Ashcroft et D. Mermin , EDP Sciences
  • Magnetism and magnetic materials, J.M.D. Coey, Cambridge edition
  • Peter Campbell, “Permanent Magnet Materials and their Application”, Cambridge University Press, 1996

En bref

Crédits ECTS 2.0

Nombre d'heures 24.0

Période de l'année
Automne

Contact(s)

Composante

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On-line course