Motor Sizing Guiding Considerations•Peak Torque, Tpeak•Effective Continuous Torque (RMS Torque), TRMS•Maximum Speed, ωmax•Other Factors, e.g., size, weight, cost, etc. (1)peaktotextfricTJTTα=++22where:peak torque, N-m (or in-lb or ft-lb, etc.)total inertia of moving parts as seen by the motor shaft, kg-mangular acceleration of motor shaft, rad/storque at motor shaft neededpeaktotextTJT====to overcome externally applied forces or torques, N-mtorque at motor shaft needed to overcome frictional forces or frictional torques, N-mfricT=2211(2)tRMScycletTTdtt=∫Procedure•Make a ‘ballpark’ estimate of the power required using rough calculations, estimation, or
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This note was uploaded on 09/08/2010 for the course EE 106 at San Jose State University .