Fagor QC-PDS - Page 191

 Selection criteria
SELECTING CRITERIA
Selecting the main power supply
5.
· 191 ·
Ref.2003
QC-PDS
HARDWARE
Then, depending on the peak power (S3-5% cycle) that some servomotors may be required
by some servomotors at any given time:
T. H5 /14 Required power drawn from the main power supply by the QC-PDS system depending on the peak
power (S3-5% cycle) provided by the drive, for 4/8 kHz IGBT switching frequencies.
FKM SYNCHRONOUS MOTORS
Peak power P (S3-5%)
P (S3-5%)
(kW)
GROUP I
From 0 kW
to 2 kW
synchronous
1
2
Sum of GROUP I
*
ki 
3
+
GROUP II
From 2.0 kW
to 8.5 kW
synchronous
1
2
Sum of GROUP II
*
kii 
3
+
GROUP III
From 8.5 kW
to 27 kW
synchronous
1
2
Sum of GROUP III
*
kiii 
3
=
Power SUM (kW)
3
N
FACTOR
Kj
QC-DR-
POWER
(S3-5%)
1 10074.6
2 0.63 012 7.9
3 0.50 021 13.8
4 0.38 030 19.7
5 0.33 040 26.3
6 0.28 055 36.2
080 52.6
120 79.0
Units: kW.
N: Nr of synchronous
motors per group
V line = 400 V AC
I peak = Imax. of drive
Ki: Simultaneity
factor
cos = 0.95
POWER S3-5% 3VI
P
cos =
where: j = i, ii, iii.