Danfoss VLT Micro Drive FC 51 Programming Manual page 16
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Parameter Descriptions
®
VLT
Micro Drive FC 51 Programming Guide
NOTE
Changing this parameter affects parameters 1-22 Motor
Voltage to 1-25 Motor Frequency, 1-30 Stator Resistance, 1-33
Stator Leakage Reactance and 1-35 Main Reactance.
1-22 Motor Voltage (U_
)
m.n
Range:
Function:
230/400 V
[50-999 V] Enter motor voltage from nameplate
data.
1-23 Motor Frequency (f_
)
m.n
Range:
Function:
50 Hz
[20-400 Hz] Enter motor frequency from nameplate
*
data.
1-24 Motor Current (I_
)
m.n
Range:
Function:
M-type dependent
[0.01-100.00 A] Enter motor current from
*
nameplate data.
1-25 Motor Nominal Speed (n_
)
m.n
Range:
Function:
M-type Dependent
[100-9999 RPM] Enter motor nominal
*
speed from nameplate
data.
1-29 Automatic Motor Tuning (AMT)
Option:
Function:
Use AMT to optimize motor performance.
NOTE
This parameter cannot be changed while
motor runs.
1.
Stop the frequency converter - make
sure motor is at standstill
2.
Choose [2] Enable AMT
3.
Apply start signal
- Via LCP: Press [Hand On]
- Or in Remote On mode: Apply start
signal on terminal 18
[0]
Off
AMT function is disabled.
*
[2]
Enable
AMT function starts running.
NOTE
AMT
To gain optimum tuning of the frequency
converter, run AMT on a cold motor.
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4.2.2 1-3* Adv. Motor Data
Adjust advanced motor data using one of these methods:
1.
Run AMT on cold motor. The frequency converter
measures value from motor.
2.
Enter X
value manually. Obtain value from motor
1
supplier.
3.
Use R
, X
, and X
default setting. The frequency
s
1
2
converter establishes setting based on motor
nameplate data.
NOTE
These parameters cannot be changed while the motor
runs.
P 1-30
I
1
R
X
X
S
1
2
U
1
R
X
R
1s
h
1
P1-35
Illustration 4.1
1-30 Stator Resistance (R
)
s
Range:
Function:
Depending on motor data
[Ohm] Set stator resistance value.
*
1-33 Stator Leakage Reactance (X
)
1
Range:
Function:
Depending on motor
[Ohm] Set stator leakage reactance
data
of motor.
*
1-35 Main Reactance (X
)
2
Range:
Function:
Depending on motor data
*
[Ohm] Set motor main reactance.
4.2.3 1-5* Load Independent Setting
This parameter group is for setting the load independent
motor settings.
1-50 Motor Magnetization at Zero Speed
Range:
Function:
This parameter enables different thermal
load on motor when running at low speed.
100 %
[ 0-300%] Enter a percentage of rated magnetizing
*
current. If setting is too low, motor shaft
torque may be reduced.
15
4
4
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