Lenze ECSCSxxx - Manual (Page 149)

Commissioning
Operation with motors from other manufacturers
Adjusting current controller
6
l
149 EDBCSXS064 EN 4.0
6.15.3 Adjusting current controller
For an optimum machine operation, the current controller settings must be adapted to the
electrical motor data.
The parameters of the current controller depend on the electrical motor data. They do not
depend on mechanical data as with the speed and position control circuit. This is why the
default current controller settings of the "GDC motor data input assistant" can usually be
used. A current controller adjustment is only required for third−party motors and for Lenze
motors only in special cases.
Leakage inductance and stator resistance of the motor are known:
The gain of the current controller V
p
and the integral−action time of the current controller
T
n
can be calculated by approximation:
Current controller gain (V
p
) Integral−action time of the current controller (T
n
)
V
p
+
L1
S
250
ms
T
n
+
L1
S
R1
S
L1
S
Motor leakage inductance
R1
S
Motor stator resistance
)
Note!
Depending on the leakage inductance of the motor, the calculated values can
be outside the adjustable range. In this case
ƒ set a lower gain and a higher integral−action time;
ƒ adjust the current controller metrologically (
^ 150).
For applications with high current controller dynamics the pilot control of the current
controller outputs can be activated with C0074 (C0074 = 1). For this, it is vital to enter the
correct values for the stator resistance (C0084) and leakage inductance (C0085).These can
be obtained from the data sheet of the motor used!