Title :
Pole optimization of brushless DC motor
Author :
Zheng, Ping ; Liu, Yong ; Wang, Tiecheng ; Cheng, Shukang
Author_Institution :
Dept. of Electr. Eng., Harbin Inst. of Technol., China
Abstract :
For the tangentially magnetized brushless DC motor used for air compressor, the pole embrace and eccentricity are optimized with 2D FEM (finite element method) to decrease the torque ripple. For the pole embrace optimization, seven different pole arc angles are compared, and 60 ° is considered as the best one. For the pole eccentricity optimization, five schemes are put forward and compared, and the half eccentric pole scheme is recommended as the best eccentric one considering average torque, torque ripple percentage and manufacturability. Two prototype motors were made and torque curves were tested. The tested and calculated results are consistent, which proves the correctness of the magnetic field calculation.
Keywords :
brushless DC motors; compressors; finite element analysis; magnetic fields; optimisation; pole assignment; torque; 2D FEM; air compressor; finite element method; half eccentric pole scheme; magnetic field calculation; pole arc angle; pole eccentricity optimization; pole embrace optimization; tangentially magnetized brushless DC motor; torque ripple; Brushless DC motors; DC motors; Finite element methods; Induction motors; Manufacturing; Optimization methods; Permanent magnets; Prototypes; Testing; Torque;
Conference_Titel :
Industry Applications Conference, 2004. 39th IAS Annual Meeting. Conference Record of the 2004 IEEE
Print_ISBN :
0-7803-8486-5
DOI :
10.1109/IAS.2004.1348544