8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
Servo control (SC)
164 L Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010
Field weakening controller
The field weakening controller serves to adapt the magnetising current when the
maximum control voltage has been reached so that in steady operation approximately
95 % of the maximally possible control voltage is output. Thus, there is a voltage reserve
for dynamic load or speed variations.
[5-20] Recommendation for setting the gain of the field controller (for Tn ≈ 10 ... 30 ms)
Tip!
If the field weakening controller is parameterised unfavourably, vibrations occur in
the magnetising current, in the direct-axis current and in the cross current, in the
torque and in the speed in the field weakening range. This is also audible by an
increased motor noise (humming). The vibrations can be dampened by a decrease
of the proportional gain of the field weakening controller.
Procedure:
• Operate the drive with max. required speed in the field weakening operation.
• Reduce Vp (C00577
) of the field weakening controller until the vibration
response cannot be detected anymore.
Parameter Info Lenze setting
Value Unit
C00577 SC: Vp field weakening controller 0.0010
C00578
SC: Tn field weakening controller 20.0 ms
V
P,FW
: Gain of the field weakening controller (C00577)
L
m
: Mutual motor inductance (C00092)
L
sl
: Motor stator leakage inductance (C00085)
p = number of pole pairs
V
PFS,
2
V
Strecke FS,
--------------------------- -
≈
V
Strecke FS,
1 σ–
σ
------------
p2π n
N
⋅⋅⋅
60
------------------------------
σ L
h
L
ss
+()
2
⋅⋅⋅=
σ 1
L
h
()
2
L
h
L
ss
+()
2
--------------------------–=
efesotomasyon.com - Lenze
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