Danfoss VLT AHF 005 Programming Guide

3.3.7 1-5* Load Indep. Setting
1-50 Motor Magnetisation at Zero Speed
This parameter is not visible on the LCP.
Range: Function:
100
%*
[0 -
300 %]
NOTICE
Parameter 1-50 Motor Magnetisation at
Zero Speed has no eect when
parameter 1-10 Motor Construction=[1]
PM, non-salient SPM.
Use this parameter along with
parameter 1-51 Min Speed Normal Magnetising
[RPM] to obtain a
dierent thermal load on the
motor when running at low speed.
Enter a value which is a percentage of the rated
magnetising current. If the setting is too low,
the torque on the motor shaft may be reduced.
Magn. current
130BA045.11
Hz
Par.1-50
Par.1-51
100%
Par.1-52 RPM
Illustration 3.8 Motor Magnetisation
1-51 Min Speed Normal Magnetising [RPM]
This parameter is not visible on the LCP.
Range: Function:
Size
related*
[10 -
300 RPM]
NOTICE
Parameter 1-51 Min Speed Normal
Magnetising [RPM] has no eect
when parameter 1-10 Motor
Construction=[1] PM, non-salient
SPM.
Set the required speed for normal
magnetising current. If the speed is set
lower than the motor slip speed,
parameter 1-50 Motor Magnetisation at
Zero Speed and parameter 1-51 Min Speed
Normal Magnetising [RPM] are of no
signicance.
Use this parameter along with
parameter 1-50 Motor Magnetisation at
Zero Speed. See Table 3.7.
1-52 Min Speed Normal Magnetising [Hz]
This parameter is not visible on the LCP.
Range: Function:
Size
related*
[ 0.3 -
10.0 Hz]
NOTICE
Parameter 1-52 Min Speed Normal
Magnetising [Hz] will not have eect
when parameter 1-10 Motor
Construction=[1] PM, non-salient
SPM.
Set the required frequency for normal
magnetising current. If the frequency is
set lower than the motor slip frequency,
parameter 1-50 Motor Magnetisation at
Zero Speed and parameter 1-51 Min Speed
Normal Magnetising [RPM] are inactive.
Use this parameter along with
parameter 1-50 Motor Magnetisation at
Zero Speed. See Table 3.7.
1-58 Flying Start Test Pulses Current
Range: Function:
Size
related*
[ 0 -
200 %]
Set the magnitude of the magnetising
current for the pulses used to detect the
motor direction. Higher values result in more
accurate results when the frequency
converter is oversized compared to the
motor. The value range and function depend
on parameter 1-10 Motor Construction:
[0] Asynchron: [0-200%]
Reducing this value reduces 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 300 VLL (rms) at nominal
speed and high winding inductance (more
than 10 mH) a lower value is recommended
to avoid wrong speed estimation. The
parameter is active when
parameter 1-73 Flying Start is enabled.
1-59 Flying Start Test Pulses Frequency
Range: Function:
Size
related*
[ 0 -
500 %]
NOTICE
See description of parameter 1-70 PM
Start Mode for an overview of the
relation between the PM Flying Start
parameters.
The parameter is active when
parameter 1-73 Flying Start is enabled. The
Parameter Descriptions Programming Guide
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Danfoss VLT AHF 005 Specifications

General

Brand	Danfoss
Model	VLT AHF 005
Category	DC Drives
Language	English