Rockwell Automation 20P PowerFlex Digital DC Drive - Manual (Page 310)

310 Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Appendix C Application Notes
Field Voltage Regulator Tuning Examples
Figure 91 - Field voltage oscillation
Oscillation after a speed change where [Arm Volt Kp] = 10% and [Arm Volt Ki]
= 80%.
Top: Par 234 [Fld Current Pct]
Bottom: Par 233 [Output Voltage]
Figure 92 - Too small of a gain
The armature voltage increases where [Arm Volt Kp] = 3% and [Arm Volt Ki] =
5%.
Top: Par 234 [Fld Current Pct]
Bottom: Par 233 [Output Voltage]
Figure 93 - Optimal field regulation
After a short transient, the field current and armature voltage are constant.
[Arm Volt Kp] = 40%, [Arm Volt Ki] = 5%.
Top: Par 234 [Fld Current Pct]
Bottom: Par 233 [Output Voltage]