GE VAT2000 User Manual

6. Control Functions and Parameter Settings
6-13
Block-B parameters (Extended function constants) list
ApplicationNo. Parameter Unit Default Min. Max. Function
ST V/f VEC PM
B23 – Torque Boost (Dual Drive)
0 Manual torque boost
voltage
%Inverter
rating
0.0 20.0 This is the boost voltage at 0Hz.

1
Square reduction
torque setting
% 0.0 0.0 25.0
This is the reduced voltage at half of
base frequency.

B24 – DC Brake (Dual Drive)
0 DC braking voltage % Inverter
rating
0.1 20.0

1 DC braking time sec 2.0 0.0 20.0

B25 – Overcurrent limit (Dual Drive)
0 Overcurrent limit % 150. 100. 300.

1 Regenerative current
limit
% 10. 5. 300. Set to 10% if there is not DBR.

2 Torque stabilisation
gain
1.00 0. 4.00 Increase if the motor vibrates.

B30 – Speed control extended function
0
Load torque observer
gain
0. 0. 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.

1 Model machine time
constant
ms 500. 10. 20000. Set the model machine time constant
used by the load torque observer.

2 ASR proportional
change rate limit
% 50.0 1.0 400.0 If the speed setting value or motor
speed change suddenly, this will
prevent the ASR's, P response, from
suddenly changing.

3 LPF time constant for
Speed setting
ms 0. 0. 1000. This filter is used to suppress
overshooting, by setting a time
constant equivalent to the speed
response.

4 LPF time constant for
Speed detection
ms 2. 0. 1000. This filter is used to suppress the
noise in speed detection.

5 LPF time constant for
Speed detection ASR
ms 0. 0. 1000. This filter is used for the speed
detection in the ASR.

6
LPF time constant for
flux compensation
ms 20. 0. 1000.
This filter affects the speed detection
used in constant power or iron loss
compensations, etc.

7
LPF time constant for
actual Torque setting
ms 0. 0. 1000.
Set the low path filter time constant
used for the torque current command.

8 LPF time constant for
drooping
ms 100. 0. 1000. Set the low path filter time constant
used for drooping value input into the
speed regulator.


GE VAT2000 Specifications

General

Brand	GE
Model	VAT2000
Category	Controller
Language	English