1-56 U/f Characteristic - F
Range:
Function:
Size
related
*
[0 -
400.0
Hz]
Enter frequency points to form a U/f charac-
teristic matching the motor. Voltage at each
point is defined in
parameter 1-55 U/f Charac-
teristic - U
.
Make a U/f characteristic based on 6 definable
voltages and frequencies, see
Simplify U/f characteristics by merging 2 or
more points (voltages and frequencies). Set
the points at equal values.
Motor Voltage
Par 1-55 [x]
Output Frequency
Par 1-56 [x]
1-55[5]
1-55[4]
1-55[3]
1-55[2]
1-55[1]
1-55[0]
1-56
[0]
1-56
[1]
1-56
[2]
1-56
[3]
1-56
[4]
1-56
[5]
130BA166.10
Illustration 4.5 U/f Characteristic
1-60 Low Speed Load Compensation
Range:
Function:
100 %
*
[0 -
300 %]
Enter the low speed load voltage compen-
sation value in percent. This parameter is
used for optimizing the low speed load
performance. This parameter is only active if
parameter 1-10 Motor Construction
=
[0]
Asynchron
.
1-61 High Speed Load Compensation
Range:
Function:
100 %
*
[0 -
300 %]
Enter the high-speed load voltage compen-
sation value in percent. This parameter is
used for optimizing the high-speed load
performance. This parameter is only active if
parameter 1-10 Motor Construction
=
[0]
Asynchron
.
1-62 Slip Compensation
Range:
Function:
Size
related
*
[-400 -
400 %]
Enter the % value for slip compensation
to compensate for tolerances in the
value of n
M,N
. Slip compensation is
calculated automatically, which is based
on the nominal motor speed n
M,N
.
1-63 Slip Compensation Time Constant
Range:
Function:
0.1 s
*
[0.05 - 5 s] Enter the slip compensation reaction speed.
A high value results in slow reaction, and a
low value results in quick reaction. If low-
1-63 Slip Compensation Time Constant
Range:
Function:
frequency resonance problems occur, use a
longer time setting.
1-64 Resonance Dampening
Range:
Function:
100 %
*
[0 -
500 %]
Enter the resonance damping value. Set
parameter 1–64 Resonance Dampening
and
parameter 1–65 Resonance Dampening Time
Constant
to help eliminate high-frequency
resonance problems. To reduce resonance
oscillation, increase the value of
parameter 1–
64 Resonance Dampening
.
1-65 Resonance Dampening Time Constant
Range:
Function:
0.005 s
*
[0.001 -
0.050 s]
Set
parameter 1–64 Resonance
Dampening
and
parameter 1–65
Resonance Dampening Time Constant
to
help eliminate high-frequency resonance
problems. Enter the time constant that
provides the best dampening.
1-66 Min. Current at Low Speed
Range:
Function:
50 %
*
[0 - 120 %] Applies to PM motors only. Increasing the
minimum current improves motor torque at
low speed, but also reduces efficiency.
1-70 PM Start Mode
This parameter is valid for software version 2.80 and later
versions. Use this parameter to select the PM motor start mode,
which is to initialize the VVC
+
control core for previously free-
running PM motors. This parameter is active for PM motors in
VVC
+
mode only if the motor is stopped (or running at low
speed).
Option:
Function:
[0]
*
Rotor Detection The rotor detection function estimates the
electrical angle of the rotor and uses the
angle as a starting point. This option is
the standard selection for automation
frequency converter applications. If the
flying start function detects that motor is
running at low speed or is stopped, the
frequency converter can detect the rotor
position (the angle). The frequency
converter then starts the motor from that
angle.
[1]
Parking
The parking function applies DC current
across the stator winding, and rotates the
rotor to electrical zero position. This
function is typically selected for HVAC
applications. If the flying start function
Parameters
Programming Guide
MG03N202
Danfoss A/S © 11/2015 All rights reserved.
47
4
4
