1-52 Min Speed Normal Magnetising [Hz]
Range: Function:
Size
related*
[ 0.3
-
10.0
Hz]
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.
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: Function:
Size
related*
[ 0 -
0
%]
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.
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: Function:
Size
related*
[ 0 -
0
%]
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
1-59 Flystart Test Pulses Frequency
Range: 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.
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: 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 [kW] Change over [Hz]
0.25 -7.5 < 10
11-45 < 5
55 -550 < 3-4
Table 3.7
NOTE
1-60
Low Speed Load Compensation will not have effect
when 1-10 Motor Construction = [1] PM, non salient SPM.
130BA046.11
60%
0%
100%
U
m
Changeover
f
out
Par.1-60 Par.1-61
Illustration 3.9
Parameter Description
VLT
®
Refrigeration Drive Programming Guide
42 MG16H102 - VLT
®
is a registered Danfoss trademark
33
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