VM1000 Series
‐63‐
If VFD will measure the stator resistance, rotor resistance and leakage inductance
instead of the mutual inductive reactance and load current,the user can calculate
these two parameters on their own according to the motor nameplate. The
parameters that used for calculating motor nameplate are: rated voltage U, rated
current I, rated frequency and power factor η:
The calculation methods of motor no-load current and motor mutual inductance is as
follows: Lσ indicates motor leakage inductance.
no-load current : I
o
=
calculation of mutual inductance: L
m
=
I
o：no-load current
L
m：mutual inductance
L
σ：leakage inductance
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