Danfoss VLT AutomationDrive FC 361 Programming Manual page 43

Parameter Descriptions
1-52 Min Speed Normal Magnetising [Hz]
Range: Function:
Use this parameter along with
parameter 1-50 Motor Magnetisation
at Zero Speed. See Illustration 4.6.
1-55 U/f Characteristic - U
Array [6]
Range: Function:
Size [0 - 1000 V] Enter the voltage at each frequency
related point to form a U/f characteristic
*
manually 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.
1-56 U/f Characteristic - F
Array [6]
Range: Function:
Size [ 0 - 1000.0 Enter the frequency points to form
related Hz] a U/f characteristic manually
*
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.
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 1-56 1-56
[0] [1] [2]
Illustration 4.7 U/f Characteristic
MG06J202
Programming Guide
1-56
1-56 1-56
[5]
[3] [4]
Output Frequency
Par 1-56 [x]
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1-58 Flying Start Test Pulses Current
Range: Function:
NOTICE
Size [ 0 - 200 %]
related
*
This parameter is only
available in VVC
NOTICE
This parameter has effect on
PM motors only.
Sets the current level for the flying
start test pulses that are used to
detect the motor direction. 100%
means I
high enough to avoid noise
influence, but low enough to avoid
affecting the accuracy (current must
be able to drop to 0 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 PM motors,
the value tunes for back EMF and
d-axis inductance of the motor.
1-59 Flying Start Test Pulses Frequency
Range: Function:
Size [ 0 - 500 %] Asynchronous motor: Set the
related frequency of the flying start test
*
pulses that are used to detect the
motor direction. For asynchronous
motors, the value 100% means that
the slip is doubled. Increase this
value to reduce the generated
torque.
For synchronous motors, this value
is the percentage n
running motor. Above this value,
flying start is always performed.
Below this value, the start mode is
selected in parameter 1-70 Start
Mode
+
.
. Adjust the value to be
m,n
of the free-
m,n
41
4 4