Title :
Finite element analysis on torque fluctuation of PMDC motors induced by cogging and commutation
Author :
Liu, Ruifang ; Yan, Dengjun ; Hu, Minqiang
Author_Institution :
Sch. of Electr. Eng., Beijing Jiao Tong Univ., China
Abstract :
Permanent magnet DC (PMDC) motors have extensive field of application. While rotor moving, the variation of air-gap reluctance under PM pole causes cogging torque. The coil current varies during commutation period. The two factors cause torque fluctuation. Finite element analysis (FEA) is used to solve the fluctuation in this paper. The moving problem of rotor is analyzed by interpolation moving boundary method. Armature commutation rule is determined through taking account of practical brush width. The proposed method has been proved efficient and accurate after comparing the FEA results with measured data.
Keywords :
DC motors; commutation; finite element analysis; interpolation; permanent magnet motors; rotors; torque; FEA; PM pole; air-gap reluctance; armature commutation rule; cogging torque; finite element analysis; interpolation moving boundary method; permanent magnet DC motor; Commutation; DC motors; Finite element methods; Fluctuations; Forging; Magnetic analysis; Permanent magnet motors; Reluctance motors; Rotors; Torque;
Conference_Titel :
Electrical Machines and Systems, 2003. ICEMS 2003. Sixth International Conference on
Conference_Location :
Beijing, China
Print_ISBN :
7-5062-6210-X
