Lenze E84AVHC Series - 5.6.3.3 Optimising dynamic performance and field weakening behaviour

Firmware ≤ 05.00 - DMS 4.2 EN - 02/2010 L 141
8400 HighLine | Parameter setting & configuration
Motor control (MCTRL)
Sensorless vector control (SLVC)
Speed controller reset time Ti
Apart from setting the P component, C00071/1
provides the possibility to take influence
on the I component of the PI controller.
 Tip!
Value range recommended by Lenze for the setting of the reset time:
Ti = 20 ms … 150 ms
5.6.3.3 Optimising dynamic performance and field weakening behaviour
In the Lenze setting, the torque controller has been preset in such a way that robust and
stable operation with a moderate dynamic response is enabled over the entire speed
range. Retrospective optimisation of the controller parameters is not necessary.
A greater dynamic performance of the sensorless vector control can be achieved by
reducing time constant Ti of the speed controller (C00074/2
).
A greater dynamic performance of the field weakening function can be achieved by setting
a time constant ≤ 15 ms. This means for actual speeds above rated speed a better torque-
speed-characteristic in the field weakening range:
[5-14] Speed / torque characteristic diagram in the field weakening range
 For Ti > 15 ms (see ), the actual speed value slightly drops in the field weakening
range if the load torque increases in the motor mode.
 For Ti ≤ 15 ms (see ), the speed remains stable in the field weakening range if the
torque is within the M/n characteristic field highlighted in grey.
Parameter Info Lenze setting
Value Unit
C00073/2 SLVC: Vp torque controller 1.25
C00074/2
SLVC: Ti torque controller 30 ms
 Torque controller time constant Ti > 15 ms
 Torque controller time constant Ti ≤ 15 ms
10
n
N
n
N
M
N
M
N
MM
nn
efesotomasyon.com - Lenze