Fagor APS-24, Hardware Manual

Page: 218 / 386

   Selection criteria
232
5.
S
E
LECT
ING CRI
T
ERIA
Power
supply selection
218
DDS
HARDWARE
Ref.1310
5.4 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 mechanical power output of the motor.
SYNCHRONOUS FXM & FKM
n : Max. axis speed in the application (rpm)
nN: Motor rated speed (rpm)
Pa= Pcal·1.17· [n/nN] : Axis power (kW) Power (characteristics table)
Axes
Pcal
n nN Pa
kW
rpm rpm
kW
GROUP I
0 to 2 kW
Synchronous
1
2
3
Sum of GROUP I:
*
Ki

GROUP II
0 to 8.5 kW
Synchronous
1
2
+
3
Sum of GROUP II:
*
Kii

GROUP III
8.5 to 27 kW
Synchronous
1
2
+
3
Sum of GROUP III:
*
Kiii

=
SUM OF POWER: (kW)
1
Synchronous
motors per group
K factor
1 1
2 0.63
3 0.50
4 0.38
5 0.33
6 0.28
.
.. where:
Pcal : motor power (kW) according to the motor
characteristics table.
1.17: coefficient that stores the efficiency of the
motor (0.9) and that of the drive (0.95).
The servo set is divided in groups depending on
their power by applying to each one a simulta-
neity factor Ki, Kii, Kiii.