GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 122)

GEI-100332Ga
——— CONVERTER OPERATION ———
5
46
- Enable flux reg = Enabled (default)
- Flux reg mode = Voltage control
- Enable flux weak = Enabled
- Set Gen access = Flux reference and Gen amplitude to 70% of the rated field motor current (this to allow
the overshoot of the system).
- Increase the value of the Flux P parameter till the overshoot of the field current is lower than 4% (Field curr).
- Increase the value of Flux I untill the overshoot is higher than 4%, then reduce it slightly lower than 4% .
n
ote
! Because of the high time constant, the rate of rise of the field current is limited . The increase
time with optimal scale conditions can be last several hundreds of milliseconds.
- Gen access = Disconnected
- Enable flux weak = Disabled
- Set Flux current min at the desired value
- Configure the analog outputs on the basis of your needs.
- Save the settings.
Figures 5.3.6.5 ... 5.3.6.7 show some examples of tuning of the Flux regulator
Figure 5.3.6.5: Above: Flux reference; Below: Flux
current. The regulator behavior is not good. Jumps
are due to field changing.
Figure 5.3.6.6: Above: Flux reference; Below: Flux
current. The reduction of the field current depends
on the field time constant. The reg has no influence.
Figure 5.3.6.7: Above: Flux reference; Below: Flux
current. The increment in the field current has no
jump. Variation compared to Fig. 4.5.7: Increase of
Flux P from 2 to 10%. Flux I = 5%.