GE VAT2000 Instruction Manual page 88

No. Parameter
B23 – Torque Boost (Dual Drive)
0 Manual torque boost
voltage
Square reduction
1
torque setting
B24 – DC Brake (Dual Drive)
0 DC braking voltage
1 DC braking time
B25 – Overcurrent limit (Dual Drive)
0 Overcurrent limit
1 Regenerative current
limit
2 Torque stabilisation
gain
B30 – Speed control extended function
0 Load torque observer
gain
1 Model machine time
constant
2 ASR proportional
change rate limit
3 LPF time constant for
Speed setting
4 LPF time constant for
Speed detection
5 LPF time constant for
Speed detection ASR
6 LPF time constant for
flux compensation
7 LPF time constant for
actual Torque setting
8 LPF time constant for
drooping
6. Control Functions and Parameter Settings
Block-B parameters (Extended function constants) list
Unit Default
% Inverter 0.0
rating
% 0.0 0.0
% Inverter 0.1
rating
sec 2.0 0.0
% 150. 100.
% 10. 5.
1.00 0.
0. 0.
ms 500. 10.
% 50.0 1.0
ms 0. 0.
ms 2. 0.
ms 0. 0.
ms 20. 0.
ms 0. 0.
ms 100. 0.
Min. Max.
20.0 This is the boost voltage at 0Hz.
This is the reduced voltage at half of
25.0
base frequency.
20.0
20.0
300.
300. Set to 10% if there is not DBR.
4.00 Increase if the motor vibrates.
200. This is the gain for the load torque
observer.
To increase the response
characteristic from an external
disturbance, set a large gain.
Note that if the gain is set too high,
the output torque could start hunting.
When set to zero, the load torque
observer will not function.
20000. Set the model machine time constant
used by the load torque observer.
400.0 If the speed setting value or motor
speed change suddenly, this will
prevent the ASR's, P response, from
suddenly changing.
1000. This filter is used to suppress
overshooting, by setting a time
constant equivalent to the speed
response.
1000. This filter is used to suppress the
noise in speed detection.
1000. This filter is used for the speed
detection in the ASR.
1000. This filter affects the speed detection
used in constant power or iron loss
compensations, etc.
1000. Set the low path filter time constant
used for the torque current command.
1000. Set the low path filter time constant
used for drooping value input into the
speed regulator.
6-13
Function Application
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