Title :
Analytical approach to cogging torque calculation in PM brushless motors
Author :
Gieras, Jacek F.
Author_Institution :
United Technol. Res. Center, Hartford, CT, USA
Abstract :
The paper discusses the approach to analytical calculation of the cogging torque in PM brushless motors. Magnetic field energy in the air gap has been used to calculate the torque. Two equations have been derived: with the PM width taken into account, and simplified equation, i.e., without the effect of the finite width of the PM. The effect of eccentricity has been included too. Analytical results have been compared with laboratory test results.
Keywords :
brushless machines; machine theory; machine windings; magnetic fields; permanent magnet motors; torque; PM brushless motors; air gap; cogging torque calculation; eccentricity; magnetic field energy; magnetic flux density; Brushless motors; Equations; Forging; Magnetic analysis; Magnetic flux; Magnetic flux density; Permeability; Rotors; Stator cores; Torque;
Conference_Titel :
Electric Machines and Drives Conference, 2003. IEMDC'03. IEEE International
Print_ISBN :
0-7803-7817-2
DOI :
10.1109/IEMDC.2003.1210329
