Danfoss VLT AutomationDrive FC 300 Programming Guide

1-35 Main Reactance (Xh)
Range: Function:
Application
dependent*
[Application dependant] Set the main reactance of the motor using one of these methods:
1. Run an AMA on a cold motor. The frequency converter will measure the value from the
motor.
2. Enter the X
h
value manually. Obtain the value from the motor supplier.
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:
Application
dependent*
[Application dependant] Enter the equivalent iron loss resistance (R
Fe
) value to compensate 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 applications. If R
Fe
is unknown, leave
par. 1-36
Iron Loss Resistance (Rfe) on default setting.
1-37 d-axis Inductance (Ld)
Range: Function:
Application
dependent*
[Application dependant] 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 Construction has the value PM, non-salient
SPM
[1] (Permanent Magnet Motor).
For a selection with one decimal, use this parameter. For a selection with three decimals, use
par. 30-80
d-axis Inductance (Ld) .
This parameter is available for FC 302 only.
1-39 Motor Poles
Range: Function:
Application
dependent*
[2 - 100 ] 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
Motor Poles based on par. 1-23 Motor Frequency and par. 1-25 Motor Nominal Speed .
1-40 Back EMF at 1000 RPM
Range: Function:
Application
dependent*
[Application dependant] Set the nominal back EMF for the motor when running at 1000 RPM. This parameter is only active
when par. 1-10
Motor Construction 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.
1-41 Motor Angle Offset
Range: Function:
0* [-32768 - 32767 ] Enter the correct offset angle between the PM motor and the index position (single-turn) of the
attached encoder or resolver. The value range of 0 - 32768 corresponds to 0 - 2 * pi (radians). To
FC 300 Programming Guide 3 Parameter descriptions
MG.33.M8.02 - VLT
®
is a registered Danfoss trademark 51
3

Danfoss VLT AutomationDrive FC 300 Specifications

General

Brand	Danfoss
Model	VLT AutomationDrive FC 300
Category	DC Drives
Language	English