apfiff09 marine
VACON®
•
207
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
Classified as Public
P2.8.7.3
Torque stabiliser Gain in FWP area ID1414
“TorqStabGainFWP”
Gain of the torque stabiliser at field weakening point in open loop motor control
operation. See details from Torque Stabiliser Gain.
P2.8.7.4
Torque stabiliser Limit ID1720
“TorqStabLimit
This defines how much torque stabiliser can affect output frequency.
7.8.4.2
Flux Circle stabiliser
P2.8.7.5
Flux Circle stabiliser Gain
ID1550
“FluxCircleStabG”
Gain for flux circle stabiliser. This will control the flux to stay centralized in the origin
when an error is detected. Controller output is added to output frequency. The effect
decreases at low frequencies where the flux stabiliser has more effect. This is used at
frequencies where output voltage is at maximum limit (set by field weakening point
voltage or maximum drive output voltage).
7.8.4.3
Flux stabiliser
Flux stabilizer is the first order high-pass filter for the estimated flux producing current
𝐼
𝑑
. The
output of the filter is correcting term
𝑑𝑈
added to the output voltage reference. The gain and
the corner frequency of the filter is controlled by the following parameters.
P2.8.7.6
Flux Stabiliser Gain
ID1797
“Flux Stab Gain”
Flux stabilizer gain is 0 at the zero speed and is increased linearly with the frequency to
value defined by the Flux Stab Gain which is reached at the 1 Hz.
So, the gain is obtained from
𝐺 = 𝐹𝑙𝑢𝑥 𝑆𝑡𝑎𝑏 𝐺𝑎𝑖𝑛 ∗ 𝑓, 𝑖𝑓 𝑓 < 1 𝐻𝑧
𝐺 = 𝐹𝑙𝑢𝑥 𝑆𝑡𝑎𝑏 𝐺𝑎𝑖𝑛, 𝑖𝑓 𝑓 ≥ 1 𝐻𝑧
The gain is scaled by 1000 and the actual gain of the filter is obtained from
𝐺
𝑓
=
𝐺
1000 =
𝐹𝑙𝑢𝑥 𝑆𝑡𝑎𝑏 𝐺𝑎𝑖𝑛
1000
P2.8.7.7
Flux stabiliser TC
ID1551
“FluxStab TC”
Flux Stabiliser TC defines the corner frequency of the high-pass filter. The time constant
of the filter is calculated from:
𝑇
𝑐
= 𝑇
𝑠
65536 − 2 ∗ FluxStab TC
2 ∗ FluxStab TC
= 1𝑚𝑠(
65536
2 ∗ FluxStab TC
− 1)
For example, if Flux Stabiliser TC = 64, it follows that
T
c
= 511 ms and
ω
c
= 1.96 rad/s.
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