6-11
46-FN2 Rated frequency [Hz]
Parameter of the 2nd data set. See 43-FN1. See also Fig. 6-6.
47-VN2 Rated voltage [V]
Parameter of the 2nd data set. See 44-VN1. See also Fig. 6-6.
6.6 Special functions
48-IXR Automatic load control (I
∗∗
∗∗
∗R-Compensation)
48-IXR = 0 -> I∗R Compensation inactive
1-> I∗R Compensation active with 1st and 2nd data set
2 -> I∗R Compensation only active with 1st data set
3 -> I∗R Compensation only active with 2nd data set
Precondition for activation of the I∗R compensation:
Motor data (Type plate) 50-IN, 51-COS and 52-NN entered for the load
characteristics.
The purpose of the I∗R compensation is to produce a constant torque
and reduced heating of the motor coil. This is achieved by transplacing
the load characteristics as determined by the characteristics parameters,
by an amount
∆∆
∆∆
∆
U
determined by the effective current.
See Fig. 6-7.
IW = 15-IW (Effective current)
IN = 50-IN (Motor rated
current)
COS = 51-COS (cosϕ Motor)
KIXR= 53-KIXR (Correction
factor)
The I∗R compensation becomes effective from the frequency VB∗FN. It
is increased linearly: from 0 % at frequency VB∗FN, to 100 % at frequency
2∗VB∗FN. Furthermore it is effective up to 100% (see Fig. 6-8).
∆
U IW IN COS KIXR
=−∗ ∗
()
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