Description of the Software Modules and Parameters
Parameter manual
b maXX
BM5800
Document No.: 5.16029.03
405
3
In the controller the inverse value of the "Ks actual value"
act
) serves as
a standardization constant between the acceleration value (speed controller output) and
the torque current set value (isq). The P gain factor of the speed control loop
is
[1/s] and is independent of the controlled system.
An incorrect value in the standardization constant 1/Ks
act
in the speed controller causes
that the conversion of the accelerating control in the torque current as well as the speed
controller parameterization are incorrect. Kp is not [1/s] nor is it comparable with the other
applications in the controller settings.
The evaluation of the Ks factor
is described in the chapter
The Ks adaption according to conditions deviating of the nominal point (result: Ks actual
value
) is described in the chapter
3.7.1.2 Position / speed controller adaption
Adaption of the position controller and speed controller that can be programmed freely.
At low speed the error value is very low and these deviations can not be compensated
fast enough. Therefore often a stronger controller is required for low speed.
The parameters Kp and Tn of the speed controller and Kv of the position controller are
adapted depending on the speed with the speed controller adaption. Two or three inter-
polation points can be specified for the adaption. If the mean speed threshold (
) is set to 0, the adaption is executed with two interpolation points.
The specified factors will be multiplied by the regular values of Kp (
), Tn
(
)and Kv (
). Kp and Ki will be interpolated linearly between the both
speed limits, where Ki is calculated from Kp and Tn. The Ki is reduced linearly to the value
0 if 0 ms is entered at the adaption of Tn.
The resulting adapted value of Tn is calculated from the adapted values for Kp and Ki.
This calculation of Tn is executed with low priority, because Tn is only for display.
The adaption can be calculated alternatively depending on the speed actual value or on
the speed set value or on a free usable parameter (
). In position control the
adaption can additionally be calculated depending on the speed feedforward.
NOTE!
The I-term of the speed controller is deleted at Tn = 0 ms!
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