Lenze L-force HighLine C 8400 Series Reference Manual page 239

Field controller
The field controller is designed as a PI controller.
Parameter
C00077
C00078
The gain Vp (C00077) of the field controller can be calculated using the motor rotor time
constant and the equivalent time constant of the current-controlled motor:
V
=
PFeld
If the rated data of the motor and the mass inertia of the drive system are known, we
recommend the following setting:
V ≈
-------------------------------------------------- -
PFeld
4 T
T
[5-18] Recommendation for the setting of the gain and the time constant of the field controller

Tip!
The motor rotor time constant depends on the motor rotor resistance, the
magnetising inductance, and the leakage inductance.
• For an optimal calculation, we recommend to select the motor from the motor
catalogue of the »Engineer« first if a Lenze motor is used.
from the motor catalogue in the »Engineer«
• If a third party manufacturer's motor is used, motor parameter identification
must be carried out previously.
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011
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Info
SC: Vp field controller
SC: Tn field controller
T s [ ]
R
----------------------------------------------------- - % [ ]
2
a T ms
⋅ [ ]
Replacement
T s [ ] T s [ ]
R R
= ------------------ -
ms 0.01 s [ ]
⋅ [ ]
Replacement
ms T ms
[ ] [ ]
=
NFeld R
L
8400 HighLine C | Reference manual
V : Gain of the field controller (C00077)
PField
T : Motor rotor time constant (C00083)
R
T : Motor equivalent time constant (approx. 2.5 ms)
Equivalent
a: Measure for damping (z. B. a = 2)
V : Gain of the field controller (C00077)
PField
T : Motor rotor time constant (C00083)
R
T : Motor equivalent time constant
Equi
T : Time constant of the field controller (C00078)
NField
( 135)
Automatic motor data identification
Motor control (MCTRL)
Servo control (SC)
Lenze setting
Value Unit
12.80
256.0 ms
Selecting a motor
( 137)
239