Parameter index Parameter name Recommended setting Parameter number
4.2.3.1 Stator Resistance (Rs) Enter line-to-common stator
winding resistance (Rs). If only
line-to-line data is available,
divide the line-to-line value
by 2 to achieve the line-to-
common (starpoint) value. It is
also possible to measure the
value with an ohmmeter, which
also takes the resistance of the
cable into account. Divide the
measured value by 2 and enter
the result.
130
4.2.4.3 d-axis Inductance (Ld) Enter line-to-common direct
axis inductance of the PM
motor. If only line-to-line data is
available, divide the line-to-line
value by 2 to achieve the line-
to-common (starpoint) value. It
is also possible to measure the
value with an inductance meter,
which also takes the inductance
of the cable into account. Divide
the measured value by 2 and
enter the result.
137
4.2.4.1 Back EMF Enter line-to-line back EMF
of the PM motor at 1000
RPM mechanical speed (RMS
value). Back EMF is the voltage
generated by a PM motor
when no frequency converter
is connected and the shaft is
turned externally. Back EMF is
normally specified for nominal
motor speed or for 1000 RPM
measured between 2 lines. If the
value is not available for a motor
speed of 1000 RPM, calculate
the correct value as follows: For
example, if back EMF at 1800
RPM is 320 V, the back EMF at
1000 RPM is:
Back EMF=(Voltage/
RPM)x1000=(320/1800)x1000=1
78.
140
VVC+ is the most robust control mode. In most situations, it provides optimum performance without further adjustments.
Run a complete AMA for best performance. See 5.4.5 Automatic Motor Adaptation (AMA).
52 | Danfoss A/S © 2024.03 AB413939445838en-000301 / 130R1254
Application Guide | iC2-Micro Frequency Converters
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