Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

11.1 Servomotor Capacity Selection Examples• Load moment of inertia at motor shaft-4 2J = J + J + J = 44.9 × 10 (kg • m )L L1 B C(5) Load Moving Power2πNP O = M • T L 2π × 1500 × 1.73= = 272 (W)6060(6) Load Acceleration Power2π60J L2π60P a = ( N M ) 2 = ( × 1500 ) 2 = 1108 (W)ta(7) Servomotor Provisional Selection(a) Selecting Conditions• T L ≤ Motor rated torque• Pa + Po = (1 to 2) × Motor rated output• N M ≤ Motor rated speed• J L ≤ SERVOPACK allowable load moment of inertiaThe followings satisfy the conditions.• SGMGH-09A2A servomotor• SGDH-10ADG SERVOPACK(b) Specifications of the Provisionally Selected Servomotor and SERVOPACK• Rated output: 850 (W)• Rated motor speed: 1500 (min -1 )• Rated torque: 5.39 (N⋅m)• Instantaneous peak torque: 13.8 (N⋅m)• Servomotor moment of inertia: 13.9 × 10 -4 (kg⋅m 2 )• SERVOPACK allowable load moment of inertia: 69.58 × 10 -4 (kg⋅m 2 )(8) Verification on the Provisionally Selected Servomotor• Required starting torque• Required braking torque• Torque efficiency44.9 × 10 -40.12πN (J + J ) −4M M L 2π × 1500 × (13.9 + 44.9) × 10T P = + T = + 1.7360ta L60 × 0.111 (N•m) < Instantaneous peak torque•••Satisfactory2πN (J + J ) −4M M L 2π × 1500 × (13.9 + 44.9) × 10T S = − T = − 1.7360td L60 × 0.17.5 (N•m) < Instantaneous peak torque•••Satisfactory2 2 2Τ P • ta + T L • tc + T S • tdT r m s = =t3.72 (N•m) < Rated torque•••Satisfactory2 2 2(11) × 0.1 + (1.73) × 1.0 + (7.5) × 0.11.51111-3