GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 128)

GEI-100332Ga
——— CONVERTER OPERATION ———
5
52
- Suppression of the P-gain set via Spd=0 P gain:
- If the reference is above Ref 0 level:
Enable spd=0 R = Enabled
- If the ref.and/or the reaction are above Ref 0 level: Enable spd=0 R = Disabled
n
ote
! Enable spd=0 R is active only when Enable spd=0 P is enabled.
- Choice of the proportional gain for zero speed:
The P-gain corresponds to Spd=0 P gain Enable spd=0 P = Enabled
The P-gain corresponds to the normal P-gain Enable spd=0 P = Disabled
- The P-gain at a zero speed is set via Spd=0 P gain, when Enable spd=0 P is enabled.
- The intervention threshold for the recognition of zero speed is determined with Ref 0 level. It is expressed
in the dimension set by the factor function.
Adaptive of the speed regulator
n
ote
! The adaptive of the speed regulator is factory set as disabled. It must be used only when the gain
of the speed regulator has to get higher than the speed range or it has to be replaced with another
unit. As for the interaction among the parameters see section 6.13.2, “Adaptive spd reg”.
Enable of the adaptive with a blocked drive. Enable spd adap = Enabled. In this way the settings of Speed P
and Speed I are disabled.
Determine on the basis of which unit the gain of the speed regulator has to be changed. It normally depends on
the speed (Select adap type = Speed).
If the gain has to be changed on the basis of another unit, set Select adap type = Adap reference. This unit is
connected to the device as an analog value via an analog input. For this reason the Adap reference variable must
be assigned to an analog input (see in the following pages the configuration of the analog inputs).
The other possibility is to insert Adap reference via the serial interface or a Bus. In this case the insertion via
the terminal strip is not necessary.
Entering Adap speed 1 and Adap speed 2 three different speed ranges are available with several gains. Value
expressed as a percentage of Speed base value and respectively of the max value of Adap reference.
With Select adap type = Speed: the optimization is carried out as described for the “Speed regulator”. To this
purpose the following points must be taken into consideration:
- Enter with Gen offset a value which is at the beginning of the range to be optimized but which at the same
time is outside the range set with Adap joint XX.
- Enter with Gen amplitude the step, so that the speed remains inside the range to be optimized.
- The optimization is carried out separately for each range and the paramters of the regulator are set for each
range with Adap P gain XX and Adap I gain XX.
- After the optimization of the different phases look over the whole speed range.
- By changing the value of Adap joint XX it is possible to reduce the instabilities present in the transients
during the changes from one range to the other. Increasing the values the transients are slighter.
With Select adap type = Adap reference: the optimization depends on the system and it is impossible to state
here the general information needed.
When the speed zero logic is disabled (factory setting) with a blocked drive the gains of the speed regulator are
active. These are set via Adap P gain 1 and Adap I gain 1 . When the speed zero logic is enabled, the values
set for a motor at a stop are valid.