Danfoss VLT FC 103 Programming Manual page 43

Parameter Description
1-52 Min Speed Normal Magnetising [Hz]
Range:
Size
related 10.0 Hz]
*
3 3
NOTE
1-52 Min Speed Normal Magnetising [Hz] will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
1-58 Flystart Test Pulses Current
Range:
Size [ 0 -
related 0 %]
*
NOTE
See description of 1-70 PM Start Mode for an overview of
the relation between the PM Flying Start parameters.
1-59 Flystart Test Pulses Frequency
Range:
Size [ 0 -
related 0 %]
*
42
Function:
[ 0.3 - Set the required frequency for normal
magnetising current. If the frequency is
set lower than the motor slip frequency,
1-50 Motor Magnetisation at Zero Speed
and 1-51 Min Speed Normal Magnetising
[RPM] are inactive.
Use this parameter along with
1-50 Motor Magnetisation at Zero Speed.
See Table 3.6.
Function:
Set the magnitude of the magnetizing current
for the pulses used to detect the motor
direction. The value range and function
depends on parameter 1-10 Motor Construction:
[0] Asynchron: [0-200%]
Reducing this value will reduce the generated
torque. 100% means full nominal motor
current. In this case the default value is 30%.
[1] PM non salient: [0-40%]
A general setting of 20% is recommended on
PM motors. Higher values can give increased
performance. However, on motors with back
EMF higher than 300VLL (rms) at nominal
speed and high winding inductance (more
than 10mH) a lower value is recommended to
avoid wrong speed estimation. The parameter
is active when 1-73 Flying Start is enabled.
Function:
The parameter is active when 1-73 Flying Start
is enabled. The value range and function
depends on parameter 1-10 Motor Construction:
[0] Asynchron: [0-500%]
Control the percentage of the frequency for
the pulses used to detect the motor direction.
Increasing this value will reduce the generated
torque. In this mode 100% means 2 times the
slip frequency.
[1] PM non salient: [0-10%]
This parameter defines the motor speed (in %
of nominal motor speed) below which the
Parking function (see 2-06 Parking Current and
MG16H102 - VLT
®
VLT Refrigeration Drive Programming Guide
1-59 Flystart Test Pulses Frequency
Range:
NOTE
Do NOT set this parameter too high in high inertia
applications.
3.3.7 1-6* Load Depend. Setting
1-60 Low Speed Load Compensation
Range:
100 %
*
NOTE
1-60 Low Speed Load Compensation will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
U
m
Par.1-60
100%
60%
0%
Illustration 3.9
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is a registered Danfoss trademark
Function:
2-07 Parking Time will become active. This
parameter is only active when 1-70 PM Start
Mode is set to [1] Parking and only after
starting the motor.
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.
Motor size [kW]
0.25 -7.5
11-45
55 -550
Table 3.7
Changeover
Change over [Hz]
< 10
< 5
< 3-4
Par.1-61
f
out