Danfoss VLT AutomationDrive FC 302 Programming Manual page 50

Parameter Descriptions
1-55 U/f Characteristic - U
Range:
Size [0 -
related 1000 V]
*
3 3
1-56 U/f Characteristic - F
Range:
Size [ 0 -
related 1000.0
*
Hz]
Motor Voltage
Par 1-55 [x]
1-55[5]
1-55[4]
1-55[3]
1-55[2]
1-55[1]
1-55[0]
1-56
[0]
Illustration 3.10 U/f Characteristic
1-58 Flying Start Test Pulses Current
Range:
Size
related 200 %]
*
48
Function:
Enter the voltage at each frequency point
to manually form a U/f characteristic
matching the motor.
The frequency points are defined in
parameter 1-56 U/f Characteristic - F.
This parameter is an array parameter [0-5]
and is only accessible when
parameter 1-01 Motor Control Principle is set
to [0] U/f.
Function:
Enter the frequency points to manually
form a U/f-characteristic matching the
motor.
The voltage at each point is defined in
parameter 1-55 U/f Characteristic - U.
This parameter is an array parameter [0-5]
and is only accessible when
parameter 1-01 Motor Control Principle is
set to [0] U/f.
1-56 1-56 1-56 1-56
[1] [2] [3] [4]
Output Frequency
Par 1-56 [x]
Function:
[ 0 - Sets the current level for the flystart test
pulses that are used to detect the motor
direction. 100% means I
value to be big enough to avoid noise
influence, but low enough to avoid
affecting the accuracy (current must be
able to drop to zero before the next
pulse). Reduce the value to reduce the
generated torque.
Default is 30% for asynchronous motors,
but may vary for PM motors. For adjusting
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®
VLT AutomationDrive FC 301/302
1-58 Flying Start Test Pulses Current
Range:
1-59 Flying Start Test Pulses Frequency
Range:
Size
related
3.3.9 1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range:
100 %
*
Motor size
0.25 kW-7.5 kW
1-56
[5]
U
m
100%
60%
. Adjust the
m,n
0%
Illustration 3.11 Changeover
Function:
PM motors, the value tunes for back EMF
and d-axis inductance of the motor.
This parameter is only available in VVC
Function:
[ 0 - Sets the frequency of the flystart test
500 %] pulses that are used to detect the motor
*
direction. 100% means means 2 x fslip.
Increase this value to reduce the generated
torque. For PM motors, this value is the
percentage nm,n of the free-running PM
motor. Above this value, flystart is always
performed. Below this value, the start
mode is selected in parameter 1-70 PM
Start Mode
This parameter is only available in VVC
Function:
[0 - 300 Enter the % value to compensate voltage in
%] relation to load when the motor is running
at low speed and obtain the optimum U/f
characteristic. The motor size determines the
frequency range within which this parameter
is active.
Changeover
<10 Hz
Par.1-60
Changeover
+ .
+
.
Par.1-61
f
out
MG33MJ02