Fagor DDS, Hardware Manual

Page: 223 / 386

   Selection criteria
S
E
LECT
ING CRI
T
ERIA
Power
supply selection
5.
223
DDS
HARDWARE
Ref.1310
Non-FAGOR asynchronous spindle motor
For non-FAGOR asynchronous spindle motors (e.g.: a high speed spin-
dle) the previous tables for standard FAGOR motors are not available.
To properly calculate the power demanded by the non-FAGOR asynchro-
nous spindle from the power supply, it is necessary:
 To know the maximum power to be provided at the axis. Always use
the mechanical power for cycles S1 or S6-40% (depending on the
duty cycle of the applicaton).
 Obtain the power at the motor terminals by dividing the previous val-
ue by the efficiency of the motor.
If the value of the motor efficiency (eff) is unknown, apply the following
rule. For:

Divide the result by the efficiency of the drive.
NOTE. Never use the peak power!
P < 22 kW motor eff = 85% (

= 0.85)
P > 22 kW motor eff = 90% (

= 0.90)
drive eff = 90% (

= 0.90)