Title :
Analysis of cogging torque in brushless Machines having nonuniformly distributed stator slots and stepped rotor magnets
Author :
Zhu, Z.Q. ; Ruangsinchaiwanich, S. ; Ishak, D. ; Howe, D.
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK
Abstract :
A simple analytical technique is proposed for synthesizing the cogging torque waveform of a permanent magnet brushless machine from the cogging torque waveform that is associated with a single stator slot. The machine may have either uniformly or nonuniformly distributed stator slots and/or a skewed rotor, in which the skew is realized by circumferentially displacing the magnets of each pole. The technique is validated by finite element analysis and measurements.
Keywords :
brushless machines; finite element analysis; magnetic devices; permanent magnet motors; stators; stepping motors; torque; brushless machines; cogging torque waveform; finite element analysis; permanent magnet; skewed rotor; stator slot; stepped rotor magnets; Brushless machines; Finite element methods; Forging; Harmonic analysis; Magnetic analysis; Permanent magnets; Rotors; Stators; Teeth; Torque; Analytical modeling; brushless machines; cogging torque; finite element; permanent magnet;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.854968
