Vacon NXP series, System Hardware Manual

Page: 68 / 83

vacon • 68 Technical information
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6.2.1 Pump and fan load
Set all speeds to the same value (
n
min
=
n
base
=
n
max
) to have the typical pump and fan curve, i.e.
quadratically increasing load.
The overload is now set as starting torque and as OL at maximum speed (the overload is now defined
as percent of torque at maximum speed).
The calculation of current is also here done assuming nominal flux in the motor from 0 to field
weakening point (current calculation according to ”optimized flux curve” is not available).
Figure 49. Example: pump and fan load
0
100
200
300
400
500
600
700
800
0 200 400 600 800 1000 1200 1400 1600
cont. load
max load
Spe ed [rpm ]
T
o
r
q
u
e
[
N
m
]
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