Danfoss VLT AutomationDrive FC 300 Design Manual page 146

FC 300 Design Guide
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
"
Parameters for setting the load dependent
parameters for the motor.
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: 0.25 kW - 7.5 kW Change over: < 10 Hz
default setting ( )
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146
How to Programme
*
Expression limit Hz
*
display text [ ] value for use in communication via serial communication port
MG.33.B4.02 - VLT is a registered Danfoss trademark
1-61 High Speed Load Compensation
Range:
-300 - 300%
Function:
Enables compensation of voltage in relation to
load when the motor is running at high speed.
Optimum U/f characteristic is obtained. The
frequency range within which this parameter is
active, depends on the motor size.
Motor size
0.25 kW - 7.5 kW
1-62 Slip Compensation
Range:
-500 - 500 %
100%
Function:
Slip compensation is calculated automatically,
i.e. on the basis of the rated motor speed n
In par. 1-62, slip compensation is adjusted in
detail, which compensates for tolerances in the
value of n
M,N
with Torque Characteristics (par. 1-03), Speed
closed loop, Torque control, Speed feedback
and, Special motor characteristics.
1-63 Slip Compensation Time Constant
Range:
0.05 - 5.00 s
Function:
Determines the slip compensation reaction speed.
A high value results in slow reaction. On the other
hand, a low value results in quick reaction. If you
encounter low-frequency resonance problems,
the set time must be longer.
Change-over
> 10 Hz
. This function is not active along
*
100%
*
100%
.
M,N
*
0.10s