GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 120)

GEI-100332Ga
——— CONVERTER OPERATION ———
5
44
Manual tuning of speed regulator
- No voltage on terminal 12 (Drive disabled)
- Choose the following settings for the Test generator :
- Gen access = Ramp ref
- Gen frequency = 0.2 Hz
- Gen amplitude = 10 %
- Gen offset = 10 %
- Measuring the reaction on an analog output. To this purpose “Actual Spd” and “Motor current” variables
must be set on two different analog outputs (see “Programming inputs/outputs”).
- In the START UP menu set the Acc delta speed parameter with the highest value and the Acc delta time
parameter at 1 second.
- Set at 0.00 the Speed P and Speed I parameters in the REG PARAMETERS / ...parameters.
- Enable the drive (voltage on terminal 12) and Start (voltage on terminal 13).
- Increase the Speed P till when the overshoot is lower by 4% when the reaction time is shorter.
- Increase Speed I until the overshoot is higher by 4%. Decrease it, so that it is slightly lower than 4%.
- Stop and disable the drive (remove the voltage on terminal 12 and 13).
- Gen access = Not connected
- Save the settings (SAVE PARAMETERS command in the SPECIAL FUNCTION menu).
n
ote
! With the feedback “Bypass” function enabled (Enable fbk bypas = Enabled) the converter
switch directly to the armature feedback (CEMF) when the speed feedback is no more present.
This is possible when the converter is working at constant field. In this case with a discon-
nected reaction signal, it is necessary to carry out again the above mentioned optimization
of the speed regulator. The P section of the speed regulator is set via the Speed P bypass
parameter and the I section with the Speed I bypass parameter.
In some cases it is necessary to have different gains for the speed regulator, above the speed range. To this pur-
pose the converters of the DV-300 series are provided with an adaptive speed regulator.
For the tuning see the following pages