A Calculation of Torque in Motors Considering Rotor Eccentricty

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  • 回転子偏心を考慮した回転機のトルク解析
  • カイテンシヘンシン オ コウリョ シタ カイテンキ ノ トルク カイセキ

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Abstract

A new analytical approach to the fmite 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 same tendency, concerning the effects on the torque. This proposed approach is applicable to any kind of motors including eccentric rotor.

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