Lenze i950 Series, Manual

Page: 264 / 500

13.6.5 Motor control settings
13.6.5.1 Speed controller
The speed controller is automatically set when the motor has been selected from the motor
catalogue:
4
Select motor from motor catalogue
^
39
The automatically calculated settings for the speed controller enable an optimal control
behaviour for typical load requirements.
Manual post-optimisation of the speed controller
1. Setting of the gain
Set the proportional gain V
p
in parameter 0x2900:001 .
a) Specify speed setpoint.
b) Increase parameter until the drive gets unstable (observe engine noise).
4
0x2900:001
c) Reduce parameter until the drive runs stable again.
4
0x2900:001
d) Reduce the parameter to approx. half the value.
4
0x2900:001
2. Setting of the reset time
Set the reset time T
n
in parameter 0x2900:002 .
a) Reduce parameter until the drive gets unstable (observe engine noise).
4
0x2900:002
b) Increase parameter until the drive runs stable again.
4
0x2900:002
c) Increase parameter to approx. double the value.
4
0x2900:002
3. Setting of the rate time
Set the rate time T
d
in parameter 0x2900:003 .
a) Increase parameter during operation until an optimal control mode is achieved.
4
0x2900:003
Automatically calculated settings for the speed controller
We recommend a manual post-optimisation for the optimal operation.
The function for automatically calculating the gain and reset time is executed via the parame-
ter 0x2822:014 .
The following equations apply to a "rigid" system.
•
For elastic systems and systems with batches, the determined gain must be reduced.
•
The moment of inertia required for the calculation is the sum of the moment of inertia of
the motor and the load mass inertias transformed to the motor side.
Equation for calculating the gain
( )
p
= ×
× +
p
Filter Stromregler
J 2
V
60
a T T
Configuring the motor control
Options for optimising the control loops
Motor control settings
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