Danfoss VLT AutomationDrive FC 300 Series Programming Manual page 42

Parameter Descriptions
1-53 Model Shift Frequency
Range:
Size related [ 4.0 - 18.0 Hz]
*
1-54 Voltage reduction in fieldweakening
Range: Function:
0 V [0 - 100 The value of this parameter will reduce the
*
V] maximal voltage available for the flux of the
motor in fieldweakning, giving more voltage
available for torque. Be aware that too high
value may give stall problems at high speed.
1-55 U/f Characteristic - U
Range: Function:
Size [0.0 - Enter the voltage at each frequency
related 1000.0 V] point to manually form a U/f charac-
*
teristic matching the motor.
The frequency points are defined in
1-56 U/f Characteristic - F.
This parameter is an array parameter
[0-5] and is only accessible when
1-01 Motor Control Principle is set to
[0] U/f.
1-56 U/f Characteristic - F
Range: Function:
Size [ 0 - Enter the frequency points to
related 1000.0 Hz] manually form a U/f-characteristic
*
matching the motor.
The voltage at each point is defined in
1-55 U/f Characteristic - U.
This parameter is an array parameter
[0-5] and is only accessible when
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 3.10
®
VLT AutomationDrive Programmming Guide
Function:
1-56
1-56 1-56
[5]
[3] [4]
Output Frequency
Par 1-56 [x]
®
MG33ME02 - VLT is a registered Danfoss trademark
1-58 Flystart Test Pulses Current
Range: Function:
Size [ 0 - Sets the current level for the flystart test
related 0 %] pulses that are used to detect the motor
*
direction. 100% means I
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 PM motors
adjusting the value will tune for back EMF and
d-axis inductance of the motor.
This parameter is only available in VVC
1-59 Flystart Test Pulses Frequency
Range: Function:
Size [ 0 - Sets the frequency of the flystart test pulses
related 0 %] 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
1-70 PM Start Mode
This parameter is only available in VVC
3.3.6 1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range: Function:
100 % [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.
Motor size
0.25 kW - 7.5 kW
Table 3.5
. Adjust the value to
m,n
plus
.
plus
.
Change over
< 10 Hz
41
3 3