3. Use the X
h
default setting. The frequency converter
establishes the setting on the basis of the motor name
plate data.
1-36 Iron Loss Resistance (Rfe)
Range: Function:
Size re-
lated
[1 - 10.000 Ω] Enter the equivalent iron loss resistance (R
Fe
) value to compen-
sate for iron loss in the motor.
The R
Fe
value cannot be found by performing an AMA.
The R
Fe
value is especially important in torque control applica-
tions. If R
Fe
is unknown, leave par. 1-36 on default setting.
1-37 d-axis Inductance (Ld)
Range: Function:
0.0mH [0.0 - 1000.0 mH] Enter the value of the d-axis inductance. Obtain the value from
the permanent magnet motor data sheet.
This parameter is only active when par. 1-10
Motor construc-
tion
has the value
PM, non-salient SPM
[1] (Permanent Magnet
Motor).
This parameter is available for FC 302 only.
1-39 Motor Poles
Option: Function:
[4]
*
Depends on motor
type
Value 2 - 100 poles
Enter the number of motor poles.
Poles ~n
n
@ 50 Hz ~n
n
@60 Hz
2 2700 - 2880 3250 - 3460
4 1350 - 1450 1625 - 1730
6 700 - 960 840 - 1153
The table shows the number of poles for normal speed ranges of various motor types. Define
motors designed for other frequencies separately. The motor pole value is always an even number,
because it refers to the total number of poles, not pairs of poles. The frequency converter creates
the initial setting of par. 1-39 based on par. 1-23
Motor Frequency
and par. 1-25
Motor Nominal
Speed
.
1-40 Back EMF at 1000 RPM
Range: Function:
500 V
*
[10 - 9000 V] Set the nominal back EMF for the motor when running at 1000
RPM. This parameter is only active when par. 1-10
Motor con-
struction
is set to
PM motor
[1] (Permanent Magnet Motor).
This parameter is available for FC 302 only.
NB!
When using PM motors, it is recommended to use
brake resistors.
FC 300 Programming Guide 2. How to Programme
MG.33.M2.02 - VLT
®
is a registered Danfoss trademark
49
2
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