Installation ASDA-B3 2 Note: in the servo motor model name, 2 represents the encoder type; 3 represents the brake or keyway / oil seal type; 4 represents the shaft diameter and connector type; and 5 represents the special code. Assume that the load inertia is N times the motor inertia, and when the motor decelerates from 3,000 rpm to a stop, the regenerative energy is (N+1) Ч Eo and the regenerative resistor needs to consume (N+1) Ч Eo - Ec joules. Assume that the reciprocating motion cycle is T sec, then the required power of regenerative resistor = 2 Ч ((N+1) Ч Eo - Ec) / T. The calculation is as follows: Example:
For the motor ECM-A3L-CY0604RS1 (400 W), the reciprocating motion cycle is T = 0.4 sec. Its rotation speed is 3,000 rpm and the load inertia is 15 times of the motor inertia.
2-20 Regenerative energy Maximum generated when the Rotor inertia regenerative motor decelerates from Servo drive (kW) Motor energy of the (× 10-4kg.m2) the rated speed to a capacitance Ec stop without load Eo (joule) (joule) 1.5 ECM-B3M-E 2 1315 3 4 5 11.22 24.66 34.94 2.0 ECM-B3M-E 2 1320 3 4 5 14.65 32.20 26.21 2.0 ECM-B3M-E 2 1820 3 4 5 29.11 63.98 26.21 3.0 ECM-B3M-F 2 1830 3 4 5 53.63 66.3 31.82 High inertia 0.1 ECM-A3H-C 2 040F 3 4 5 0.0455 0.23 4.21 0.1 ECM-A3H-C 2 0401 3 4 5 0.0754 0.37 4.21 0.2 ECM-A3H-C 2 0602 3 4 5 0.25 1.24 5.62 0.4 ECM-A3H-C 2 0604 3 4 5 0.45 2.23 8.42 0.4 ECM-A3H-C 2 0804 3 4 5 0.92 4.55 8.42 0.75 ECM-A3H-C 2 0807 3 4 5 1.51 7.47 18.25 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 3 4 5 Step What to do Calculation and setting method 1 Set the capacity of the regenerative resistor to the maximum.
Set P1.053 to the maximum value. 2 Set the operation cycle (T). Manual input. 3 Set the rotation speed (wr). Manual input or read the status with P0.002. 4 Set the load / motor inertia ratio (N). Manual input or read the status with P0.002. 5 Calculate the maximum regenerative energy (Eo). Eo = J * wr2/182 6 Find the regenerative energy that can be absorbed by the capacitor (Ec). Refer to the table above. 7 Calculate the required capacity of the regenerative resistor.
2 × ((N+1) × Eo - Ec) / T Regenerative energy Maximum generated when the motor regenerative Servo drive Rotor inertia Motor decelerates from the rated energy of the (kW) J (× 10-4kg.m2) speed to a stop without capacitance Ec load Eo (joule) (joule) 0.4 ECM-A3L-CY0604RS1 0.15 0.74 8.42