Power Supply Selection - Fagor DDS Series Hardware Manual

   Selection criteria

5.3 Power supply selection

Calculation of the power required from the power supply by the synchronous servo
motors
Initially, considering the mechanical power provided by the motors:
T. H5/5 Power supply selection depending on the Pa mechanical power output of the motor.
5.
224
DDS
HARDWARE
Ref.1912
· 212 ·
SYNCHRONOUS FXM/FKM
Mechanical power
Axes
1
GROUP I
2
0 to 2 kW
Synchronous
3
Sum of GROUP I :
1
GROUP II
0 to 8.5 kW
2
Synchronous
3
Sum of GROUP II :
1
GROUP III
8.5 to 27 kW
2
Synchronous
3
Sum of GROUP III :
Nr of synchronous
motors per group
1
2
3
4
5
6
n : Max. axis speed in the application (rpm)
nN : Motor rated speed (rpm)
Pa = Pcal·1.17· [n/nN] : Axis power (kW)
n nN
Pcal
rpm rpm
kW
SUM OF POWER (kW)
where:
K
factor
Pcal : motor power (kW) according to the motor
1.00
characteristics table.
0.63
1.17 : coefficient that stores the efficiency of the
0.50 motor (0.90) and that of the drive (0.95).
0.38
The servo set is divided in groups depending on
0.33
their power by applying to each one a simultaneity
factor Ki, Kii, Kiii.
0.28
Pa
kW

Ki
*
+

Kii
*
+

Kiii
*
=
1