Title :
Cogging torque due to roundness errors of the inner stator core surface
Author :
Kitamura, Masashi ; Enomoto, Yuji ; Kaneda, Junya ; Komuro, Matahiro
Author_Institution :
Res. Lab., Hitachi Ltd., Ibaraki, Japan
fDate :
5/1/2003 12:00:00 AM
Abstract :
Cogging torque of brushless permanent magnet (PM) motors employing segmented stator cores with narrow slot openings has been investigated. Two types of test motors were examined: one with a segmented Halbach cylinder rotor and the other with a radially oriented ring PM rotor. The measured cogging torque was predicted from the measured dimensional errors for the inner radius of the stator core in both types.
Keywords :
brushless machines; permanent magnet motors; stators; torque; brushless permanent magnet motor; cogging torque; inner stator core surface; radially oriented ring PM rotor; roundness error; segmented Halbach cylinder rotor; segmented stator core; slot opening; Brushless motors; Engine cylinders; Fabrication; Forging; Magnetization; Permanent magnet motors; Rotors; Stator cores; Testing; Torque measurement;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2003.810533
