WEG CFW-11 Series, Programming Manual, Page: 133 / 307

11-15
11
Vector Control
11.7.1 Adjustment of the Parameters P0409 to P0412 Based on the Motor Data Sheet
Being in the possession of the motor equivalent circuit data, it is possible to calculate the value to be programmed
in the parameters from P0409 to P0412, instead of using the self-tuning to obtain them.
Input data:
Motor data sheet:
V
n
= Nominal voltage informed in the motor data, in Volts;
f
n
= Nominal frequency informed in the motor data, in Hz;
R
1
= resistance of the motor stator per phase, in Ohms;
R
2
= resistance of the motor rotor per phase, in Ohms;
X
1
= stator inductive reactance, in Ohms;
X
2
= rotor inductive reactance, in Ohms;
X
m
= magnetizing inductive reactance, in Ohms;
I
o
= motor no load current;
ω
= angular speed.
ω =2 x π x f
n
R
s
= R
1
I
m
=I
0
× 0.95
σ
ls =
[X
1
+ (X
2
x X
m
) / (X
2
+ X
m
)]
ω
T
r
=
(X
2
+ X
m
)
ω x R
2
1. For motors that allow two kinds of connection (Y / ∆ or YY / ∆∆):
When the motor is connected in Y or YY:
P409 = R
s
P411=
σ
ls
When the motor is connected in ∆ or ∆∆:
P409 =
R
s
3
P411 =
σ ls
3
2. For motors that allow three kinds of connection (YY / ∆∆ / ∆):
When, on the data sheet, it is considered connection in YY or ∆∆ and the motor is connected in YY:
P409 = R
s
P411=
σ
ls
When, on the data sheet, it is considered connection in YY or ∆∆ and the motor is connected in ∆∆:
P409 =
R
s
3
P411 =
σ ls
3