Title :
Ferrofluids in electric motors-a numerical process model
Author :
Nethe, A. ; Scholz, T. ; Stahlmann, H.-D. ; Filtz, M.
Author_Institution :
Lehrstuhl Theor. Elektrotechnik, Technische Univ. Cottbus, Germany
fDate :
3/1/2002 12:00:00 AM
Abstract :
The number of technical applications of ferrofluids is constantly increasing. Their main purpose in terms of electric effects is to fill air gaps in magnetic circuits in order to lower the magnetic resistance. In this paper, a method to increase the efficiency of electric motors by filling the gap between the rotor and stator with a ferrofluid is proposed. The magnetic field and torque in a simplified model of an electric motor are calculated using orthogonal expansion
Keywords :
air gaps; electric motors; machine theory; magnetic circuits; magnetic fields; magnetic fluids; rotors; stators; torque; air gaps; electric motors; electromagnetic analysis; ferrofluids; magnetic circuit; magnetic circuits; magnetic field; magnetic resistance reduction; numerical process model; orthogonal expansion; rotor; stator; torque; Air gaps; Electric motors; Electric resistance; Filling; Magnetic circuits; Magnetic fields; Numerical models; Rotors; Stators; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
