Linear Positioners Catalog_en-US_revA - Kollmorgen

Servo System Current CalculationEC3-AKM42n-nnn-10-16BTORQUE - lb-inin/s0.0 19.4 38.8 58.2 77.6 97.0 116.452.8S42.2P31.7EE 21.1D10.60.00 125 251 376 502 627 752THRUST - lb502440203015201010050To determine the current required for a given force, calculate as follows:Example of AKM42G (115/230 Vac System)EC3-AKM42-10-16BFor Force, F = 627 lb (lower X axis) corresponds to Torque, T = 97.0 lb-in (upper X Axis)MOTORRPM460 Vac SD 3.9 /7.8 A460 0.0 5.0 Vac 0 S300 3.0 /7.5 A (Ip limit)0230 Vac5S200 6.0 /18.0 A115 Vac S200 6.0 /18.0 A115/230 V S300 6.0 /15.0 A (Ip limit)L I N E A R P O S I T I O N E R S1) Determine effective K t to use. (see chart below)K t is motor constant. K t becomes non-linear (K t eff ) in the upper peak current range of the motor capacity.Due to this non-linearity the current calculation in this peak range is less accurate than for current values at or less than thecontinuous current rating of the motor.For Torque of 97.0 lb-in for AKM42G, use K t eff = 5.39 lb-in/Arms2) Calculate I required.Motor torque is represented by T = I * K t , the motor current multiplied by the motor constant (K t or K t eff ).Thus, I required = Torque/ K t effI required = 97.0 lb-in / 5.39 lb-in/ArmsI required = 18.0 ArmsAKM23D AKM23CAKM23 115/230 Vac 460 VacTorque [lb-in (N-m)] lb-in/Arms N-m/Arms lb-in/Arms N-m/Arms 15 (1.69) K t eff3.86 0.44 6.44 0.73AKM42GAKM42EAKM42 115/230 Vac 460 VacTorque [lb-in (N-m)] lb-in/Arms N-m/Arms lb-in/Arms N-m/Arms 45 (5.08) K t eff5.39 0.61 9.85 1.11AKM52LAKM52GAKM52 115/230 Vac 115/230/460 VacTorque [lb-in (N-m)] lb-in/Arms N-m/Arms lb-in/Arms N-m/Arms 112 (12.65) K t eff5.83 0.66 13.38 1.51www.kollmorgen.com41