UNIFREM v.3.41x
10 May 2017
Page 140 from 180
Example
: Resonant oscillations are measured on a traction drive (sky-blue
–
DC link voltage,
yellow
–
current in one of motor phases)
Resonance damping function can be turned on and off by parameter:
Parameter ID: 513
SETTINGS
–
> CONTROL AND REGULATION
–
> V/f CONTROL -> RESONANCE DAMPING ->
Resonance damping = turn on
To adjust the damping, three coefficients that govern the degree of influence of selected process
variables on the output frequency and voltage are used. Oscillations amplitude can be reduced or
even completely removed by suitable tuning of these parameters.
Parameter ID: 514
Setting the resonance damping gain of the derivative DC voltage
resonance
SETTINGS
–
> CONTROL AND REGULATION
–
> V/f CONTROL -> RESONANCE DAMPING ->
Effect from the
dVdc
[ ]
Parameter ID: 515
Setting the resonance damping gain of the derivative stator current
model.
SETTINGS
–
> CONTROL AND REGULATION
–
> V/f CONTROL -> RESONANCE DAMPING ->
Effect from the
dls
[ ]
Parameter ID: 516
Setting the resonance damping gain from the stator current frequency
change.
SETTINGS
–
> CONTROL AND REGULATION
–
> V/f CONTROL -> RESONANCE DAMPING ->
Effect from the
dwls
[ ]
