User`s manual

apfiff09 marine vacon • 171
24-
6
P2.8.6.3 Torque stabiliser Gain in FWP area ID1414
Gain of the torque stabiliser at field weakening point in open loop motor control
operation. See details from Torque Stabiliser Gain.
P2.8.6.4 Torque stabiliser Limit ID1720
This defines how much torque stabiliser can affect output frequency.
7.8.4.2 Flux Circle stabiliser
P2.8.6.5 Flux Circle stabiliser Gain ID1550
Gain for flux circle stabiliser. This will control the flux to origin when error is detected.
Controller output is added to output frequency. Affect decreases at low frequencies
where flux stabiliser has more affect. 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 a first order high-pass filter for the estimated flux producing current 

. The
output of the filter is correcting term  added to the output voltage reference. The gain and
the corner frequency of the filter is controlled by the following parameters.
P2.8.6.6 Flux Stabiliser Gain ID1797
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
      
    
The gain is scaled by 1000 and the actual gain of the filter is obtained from








P2.8.6.7 Flux stabiliser TC ID1551
Flux Stabiliser TC defines the corner frequency of the high-pass filter. The time constant
of the filter is calculated from:


 

    
  
 

  
 
For example, if Flux Stabiliser TC = 64, it follows that 

= 511 ms and 

= 1.96 rad/s.