Current Regulator (Im); Flux Observer And Speed Estimation Mechanism (Im) - GE VAT2000 Instruction Manual

6-7-5 Current regulator (IM)

The current regulator (ACR) is a PI type control, including the following parameters.
Parameter
No.
A11-0 ACR response
A11-1 ACR time constant
B13-7 ACR gain compensation in
constant power range
B32-4 ACR voltage model FF
selection

6-7-6 Flux observer and speed estimation mechanism (IM)

These are parameters used with speed sensor-less vector control.
Parameter
No.
B31-0 Flux observer gain
B31-1 Speed estimated
proportional gain
B31-2 Speed estimated integral
gain
6. Control Functions and Parameter Settings
Parameter
Set the ACR response in radians.
If the response is too low or too high, the current will become
unstable, and the over current protection will function.
The ACR time constant is set.
If the time constant is too long or too short, the current will
become unstable, and the over current protection will
function.
This sets the ACR Proportional gain compensation value at
the max. speed. (above base speed)
The voltage fluctuation caused by the leakage inductance is
feed forward controlled.
The current regulator (ACR) response speed will be
increased. Select this if the current hunts in the high-speed
operation range during sensor-less control.
Parameter
This is the feedback gain for the flux observer.
If hunting occurs at the estimated speed in the high-speed
operation range, adjust within the range of 1.2 to 0.9.
This is the proportional gain for the adaptive speed
estimation mechanism. To increase the speed estimation
response, set a large value. Note that if the value is too high,
the speed estimation value will hunt.
This is the integral gain for the adaptive speed estimation
mechanism. To increase the speed estimation response, set
a large value. Note that if the value is too high, the speed
estimation value will hunt.
6-78
Function
Function