GE Industrial Solutions DV-300 DC Quick Start - Manual (Page 23)

DV-300 Adjustable Speed Drives
—————— Quick Start up guide ——————
QS
23
9.CONFIGURE ADDITIONAL
MOTOR FIELD PARAMETERS
9a. Configure field weakening operation
Field weakening can only be used with an encoder or
tachometer for speed feedback. Make sure that the speed
feedback is enabled and configured as per the previous
section.
Press CANC until the main menu, shown in all capital
letters in the keypad, is reached. Use the up or down
keys to find the main menu START UP. Press ENT.
Press the down key until the menu shown is:
START UP
Motor data
Press ENT
Press the down arrow to:
Motor data
Flux reg mode
Press ENT
Press the + key to select “Voltage control”
Flux reg mode
Voltage control
Press ENT
Press the down arrow key 4 times to get to:
Motor data
Flux weak speed
Press ENT
calculate Flux weak speed in % from the motor data
table in section 3d. The formula is:
Flux weak speed = 100 * base speed motor rpm
top speed motor rpm
enter the Flux weak speed % as calculated above. Press
ENT
NOTE:
Parameter [max output voltage] * parameter
[ Out vlt level %] sets the actual CEMF level
for crossover (field weakening point).The
[Flux weak speed] parameter merely
calibrates the calculation of speed feedback
error ( CEMF vs speed feedback) in the event
[Enable fbk contl] is enabled and used for
speed feedback loss.
Press CANC to get back to
START UP
Motor data
9b. hints on Flux regulator stability
- if the field feedback calibration dipswitch is
changed from default, rescale the default Flux
regulator gains by the factor the field current scaling
was reduced.
For example: the field scaling dipswitches are set for 1
amp on a DV3017EQ4F10
base field current regulator
TUNING
Flux P default = 2% change to .2%
TUNING
Flux I default = 1% change to .1%
weak field current regulator
TUNING
Voltage P gain default = 30% change to 3%
TUNING
Voltage I gain default = 40% change to 4%
- If the Field reg mode = constant current, the default
settings are adequate for a vast majority of
applications.
- If flux regulator instability is suspected, stop here,
and review and execute the complete flux regulator
tuning procedures in the DV-300 Instruction
manual.