Selection criteria
5.
S
E
LECT
ING CRI
T
ERIA
Se
lecting
the
main
p
ower
supp
ly
· 190 ·
198
Ref.2003
QC-PDS
HARDWARE
5.5
Selecting the main power supply
5.5.1
Calculation of the required power drawn from the power supply by the
FAGOR FKM axis feed synchronous servomotors.
Initially, considering the mechanical power provided by the servomotors:
T. H5/13
Required power drawn from the main power supply by the QC-PDS system depending on the
mechanical power Pa provided by the motor.
FKM SYNCHRONOUS MOTORS
n
: Maximum axis speed in the application (rpm)
nN
: Motor rated speed (rpm)
Pa = Pcal·1.17· [n/nN]
: Axis power (kW)
Mechanical power
Axes
Pcal
n
nN
Pa
kW
rpm rpm
kW
GROUP I
From 0
to 2 kW
Synchronous
1
2
3
Sum of GROUP I
*
ki
GROUP II
From 2.0
to 8.5 kW
Synchronous
1
2
+
3
Sum of GROUP II
*
kii
GROUP III
From 8.5 kW
to 27 kW
Synchronous
1
2
+
3
Sum of GROUP III
*
kiii
=
POWER SUM
(kW)
1
Nr of synchronous
motors per group
FACTOR
kj
1
1.00
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 combining the performance of the motor
(0.90) and that of the drive (0.95).
The servo set is divided in groups depending on their power
by applying to each one a simultaneity factor Ki, Kii, Kiii.
where:
j
= i, ii, iii.
Summary of Contents for QC-PDS
Page 1: ...DRIVE QC PDS Hardware manual Ref 2003...
Page 6: ...6 I 6 Ref 2003 6 QC PDS HARDWARE This page intentionally left blank...
Page 16: ...16 Ref 2003 16 Previous I QC PDS HARDWARE This page intentionally left blank...
Page 18: ...18 Ref 2003 18 Previous II QC PDS HARDWARE This page intentionally left blank...
Page 80: ...2 POWER SUPPLIES Power supplies 80 Ref 2003 QC PDS HARDWARE...
Page 138: ...3 DRIVES Drives 138 Ref 2003 QC PDS HARDWARE...
Page 174: ...4 AUXILIARY MODULES Auxiliary modules Ref 2003 174 QC PDS HARDWARE...
Page 302: ...8 INSTALLATION Installation Ref 2003 302 QC PDS HARDWARE...
Page 366: ...12 COMMERCIAL MODELS Commercial models Ref 2003 QC PDS HARDWARE 366...
Page 367: ...ANNEXES...
Page 368: ...ANNEX A1...
Page 383: ...ANNEX A2...
Page 398: ...ANNEX A3...
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