Title :
Comparison of PM brushless motors, having either all teeth or alternate teeth wound
Author :
Ishak, Dahaman ; Zhu, Z.Q. ; Howe, David
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Sheffield, UK
fDate :
3/1/2006 12:00:00 AM
Abstract :
The electromagnetic performance of three-phase permanent magnet brushless motors in which the slot and pole numbers are similar and either all the teeth or only alternate teeth carry a concentrated coil is compared. Analytical and finite element techniques are employed to predict the air-gap flux density distribution, the cogging torque, electromotive force (EMF) and static torque waveforms, and the winding inductances, predicted results being validated by measurements. It is shown that there is a significant difference in both the phase and line EMF waveforms, the static torque-rotor position waveforms, and the self and mutual inductances.
Keywords :
air gaps; brushless machines; electric potential; finite element analysis; machine windings; permanent magnet motors; poles and zeros; rotors; torque; EMF; air gap flux density distribution; alternate teeth wound; cogging torque; concentrated coil; electromagnetic performance; electromotive force; finite element techniques; pole numbers; slot numbers; static torque-rotor position waveforms; three-phase permanent magnet brushless motors; winding inductance; Air gaps; Brushless motors; Coils; Electromagnetic forces; Finite element methods; Force measurement; Forging; Magnetic analysis; Teeth; Wounds; Brushless machine; cogging torque; inductance; magnetic field; permanent magnet;
Journal_Title :
Energy Conversion, IEEE Transactions on
DOI :
10.1109/TEC.2005.853765
