Eaton SVCH0203 SPX Advanced, Applications Manual

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SPX advanced – description of parameters
SPX ADVANCED APPLICATION MANUAL
SVCH0203—October 2017 www.eaton.com
5.8.3.3 D And Q axis voltage drops
If d-axis and q-axis reactance’s (voltage drops) are defined,
drive calculates the optimal d-axis current reference based
on the reactance values and the motor torque in order to
account motor reluctance torque part. In this way, motor
Torque/Current ratio can be increased.
d-axis
q-axis
Code ID Description Notes
P1.8.6.12 1757 Lsd voltage drop “Lsd Voltage Drop”
D-axis reactance voltage drop 2560 = 100%.
Gives the % voltage drop across the stator inductance at nominal current and
frequency.
X
d
[ Drive scale] =
X
d
[Ω] * I
n
[A] * √3 * 2560
U
n
[V ]
P1.8.6.13 1758 Lsq voltage drop “Lsq Voltage Drop”
Q-axis reactance voltage drop 2560 = 100%.
Gives the % voltage drop across the stator inductance at nominal current and
frequency.
X
q
[ Drive scale] =
X
d
[Ω] * In [A] * √3 * 2560
U
n
[V ]
P1.8.6.14 1734 Encoder ID current %
P1.8.6.15 1737 Polarity ID mode
P1.8.6.16 1742 Polarity pulse length ms
P1.8.6.17 1748 Polarity detection angle deg
P1.8.6.18 1749 Angle identification mode
P1.8.6.19 1761 Current control Kpd %
P1.8.6.20 1759 Voltage margin %
5.8.4 Stabilization settings
5.8.4.1 Torque stabilizer
The torque stabiliser is basically a first order high-pass
filter for the estimated torque [T ]. The output of the filter
is a frequency correction term df added to the output
frequency reference. The purpose of the torque stabiliser is
to stabilise the possible oscillations in the estimated torque.
The controller gain is changing linearly between the zero
and field weakening point frequencies. The zero and field
weakening point gains can be controlled independently with
gains. The stabiliser operates at frequencies above 3 Hz.
The discrete implementation of the filter is:
Where Gf is the total gain of the filter. The gain and the corner
frequency of the filter is controlled by the following parameters
1000
df
k
= G (T
K
– T
K–1
) + df
k – 1
= G
f
(T
K
– T
K–1
) + df
k – 1
Torqstabdamp
1000
Torqstabdamp