5 adaptation of the resolver evaluation dynamics, Adaptation of the resolver evaluation dynamics, 6encoder evaluation – Lenze 9400 User Manual
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6
Encoder evaluation
6.3
Parameter setting
250
Lenze · Servo-Inverter 9400 HighLine · Reference manual · DMS 10.0 EN · 11/2013 · TD05/06
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6.3.5
Adaptation of the resolver evaluation dynamics
This function extension is available from software version V5.0 onwards!
The resolver evaluation of the controller is adapted to the resolver types mounted in Lenze motors
and offers a good compromise between the dynamic performance and interference suppression. If
the resolver is used as a speed feedback system, the dynamic performance of the resolver evaluation
determines, among other things, the maximum speed controller gain by means of which stable
operation is possible.
In a system with an EMC-compliant structure (low interference), you can increase the dynamic
performance of the resolver evaluation in
without a loss in quality in the speed signal. By
increasing
, the evaluation is rendered more dynamic, and thus the speed controller gain Vp
(
) is also increased without leaving the stable operating range.
The acceleration of the evaluation depends on the cable length, the resolver, and the quality of the
electrical shielding. In many cases, a setting of
= 300 % is possible which can double the
speed controller gain. The higher gain in the speed controller may reduce following errors.
When a resolver with a number of pole pairs > 1 (
> 1) is used, it may be necessary to increase
the dynamics of the resolver evaluation
. The following rule of thumb applies for the
parameterisation:
If an SM301 safety module is used to monitor the equipment, a parameterised value in
of >
500 % can cause incorrect triggering of the safety module. A value which is too high must be
decreased in order to eliminate incorrect triggering.
See also:
Servo control (SC):
Optimising the speed controller
Sensorless vector control (SLVC):
Optimising the speed controller
C00417
100% Value in C00080
Ч
=