Magnetic Fields and Materials
Published Online: 27 JAN 2005
Copyright © 2005 John Wiley & Sons, Inc. All rights reserved.
Modeling and High-Performance Control of Electric Machines
How to Cite
Chiasson, J. (2005) Magnetic Fields and Materials, in Modeling and High-Performance Control of Electric Machines, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471722359.ch3
- Published Online: 27 JAN 2005
- Published Print: 18 MAR 2005
Print ISBN: 9780471684497
Online ISBN: 9780471722359
- magnetic dipole moments;
- ideal magnetic materials;
- B-H curve
This chapter goes into the modeling of magnetic materials in terms of their use in electric machines. The fundamental result of this chapter is the modification of Ampere's law so that it is valid in the presence of magnetic material. This introduces the magnetic intensity field H and its relationship to magnetic induction field B via the magnetization vector M to obtain the more general version of Ampere's law. All of this requires a significant discussion of the modeling of magnetic materials. The approximation H=0 in magnetic materials is discussed and then it is shown how this approximation along with Ampere's law can be used to find the radial component of B in the air gap of AC machines. Also presented is Gauss's law for B, which leads to the notion of conservation of flux, as well as the fact that B is normal to the surface of magnetic materials.