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A calculation of torque in motors considering rotor eccentricity
Author(s) -
Ebe Katsuyoshi,
Harada Kazurou,
Ishihara Yoshiyuki,
Todaka Toshiyuki
Publication year - 2000
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/1520-6416(200009)132:4<53::aid-eej7>3.0.co;2-m
Subject(s) - cogging torque , torque , eccentricity (behavior) , eccentric , rotor (electric) , control theory (sociology) , finite element method , rotation (mathematics) , wound rotor motor , physics , torque motor , direct torque control , mechanics , induction motor , computer science , engineering , mechanical engineering , structural engineering , control (management) , quantum mechanics , voltage , artificial intelligence , political science , law , thermodynamics
A new analytical approach to the finite element calculation of torque in motors including eccentric rotor, based on the Maxwell stress method, is proposed in this paper, where the effects due to eccentricity on the cogging torque and the torque characteristics with regard to the speed are confirmed. A brushless dc motor is employed as an analytical model for two kinds of eccentricity. Consequently, in the case of eccentric motors, the unbalanced radial force functions as the repulsive force against rotation which causes the reduction of average torque, and two kinds of eccentric motors have the same tendency regarding the effects on the torque. This proposed approach is applicable to any kind of motor including eccentric rotor. © 2000 Scripta Technica, Electr Eng Jpn, 132(4): 53–61, 2000