Title :
The application of Halbach cylinders to brushless AC servo motors
Author :
Atallah, K. ; Howe, D.
Author_Institution :
Dept. of Electron. & Electr. Eng., Sheffield Univ., UK
fDate :
7/1/1998 12:00:00 AM
Abstract :
Halbach cylinders are applied to brushless ac servo motors. It is shown that a sinusoidal back-emf waveform and a low cogging torque can be achieved without recourse to conventional design features such as distributed windings and/or stator/rotor skew. A technique for imparting a multipole Halbach magnetization distribution on an isotropic permanent magnet cylinder is described, and it is shown that the torque capability of a Halbach ac servo motor can be up to 33% higher than conventional brushless permanent magnet ac motors
Keywords :
AC motors; brushless machines; magnetisation; permanent magnet motors; servomotors; torque; Halbach cylinder; brushless AC servo motor; cogging torque; multipole magnetization distribution; permanent magnet; sinusoidal back-EMF waveform; AC motors; Brushless motors; Engine cylinders; Forging; Permanent magnet motors; Rotors; Servomechanisms; Servomotors; Stator windings; Torque;
Journal_Title :
Magnetics, IEEE Transactions on
