Title :
Analytical Magnetic Field Distribution of Slotless Brushless Machines With Inset Permanent Magnets
Author :
Rahideh, Akbar ; Korakianitis, Theodosios
Author_Institution :
Dept. of Eng., Queen Mary Univ. of London, London, UK
fDate :
6/1/2011 12:00:00 AM
Abstract :
An analytical open-circuit magnetic field distribution for slotless brushless machines with inset permanent magnets is presented. Three different magnetization patterns (radial, parallel, and Halbach) have been considered and their results compared with each other. The induced back-electromotive force (EMF) is also presented for each magnetization pattern. The effects of iron inter-pole on the magnetic flux density and back-EMF have been studied. To verify the model, the results have been compared with those obtained from finite element analyses (FEA).
Keywords :
brushless machines; finite element analysis; magnetic fields; magnetic flux; permanent magnet machines; rotors; analytical magnetic field distribution; finite element analyses; induced back-electromotive force; inset permanent magnets; magnetic flux density; open-circuit magnetic field distribution; slotless brushless machines; Brushless motors; Magnetic fields; Magnetic flux; Magnetic multilayers; Magnetization; Permanent magnet motors; Rotors; Brushless DC; Halbach; external rotor; inset magnet; internal rotor; magnetic scalar potential; magnetization; modelling; permanent magnet; synchronous motor;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2011.2110658