Danfoss VLT AutomationDrive FC 300 Design Manual page 145

FC 300 Design Guide
Speed closed-loop or Torque par. 1-00 = [1] or [2]
and Flux w/motor feedback par. 1-01 = [3]
Function Variable current - Flux mode
-Sensorless
Par. 1-00 Speed open loop mode [0] and par. 1-01
Flux sensorless [2]: In speed open loop in flux
mode, the speed must be determined from the
current measurement. Below n
is working from a variable current model. Above
n x 0.125, the drive is working from the FLUX
norm
model in the adjustable frequency drive.
Speed open loop par. 1-00 = [0]
Flux sensorless par. 1-01 = [2]
Par. 1-53 cannot be adjusted while the
motor is running.
1-55 U/f Characteristic - U
Range:
0.0 - max. motor voltage
Function:
This parameter is an array parameter [0-5] and is
only accessible when par. 1-01 is set to U/f [0]. Set
the voltage at each frequency point to manually
* default setting ( ) display text
How to Program
x 0.1, the drive
norm
"
*
Expression limit V
[ ] value for use in communication via serial communication port
MG.33.B3.22 - VLT is a registered Danfoss trademark
form a U/f-characteristic matching the motor. The
frequency points are defined in par 1-56.
1-56 U/f Characteristic - F
Range:
0.0 - max. motor frequency
Function:
This parameter is an array parameter [0-5] and
is only accessible when par. 1-01 is set to U/f
[0]. Set the frequency points to manually form a
U/f-characteristic matching the motor. The voltage
at each point is defined in par. 1-55.
1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range:
-300 - 300%
Function:
Enables compensation of voltage in relation to
load when the motor is running at low speed.
Optimum U/f characteristic is obtained. The
frequency range within which this parameter is
active, depends on the motor size.
Motor size: 0.34 - 10 HP (0.25 kW - 7.5
kW) Change over: < 10 Hz
*
Expression limit Hz
*
100%
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