Test and optimization
7–1
1070 066 091-102 (01.08) GB
7
Test and optimization
7.1
Optimizing the control unit
As a rule, the drive performance is satisfactory when the basic parameters
and the additional parameters have been set, i.e. it is not necessary to make
more adjustments at the control unit.
If necessary, however, the speed controller and the filter can be modified
within the servo system.
.
In order to visualize the effects of optimization on the control loop, a
storage oscilloscope and the OM4 option module with suitably para-
meterized measuring outputs (cf. section 5.2.5, page 5–9) are abso-
lutely necessary.
CAUTION
Any interventions in the parameters of the control units are reserved
to persons with profound knowledge of the individual control unit
parameters and experience in the optimization of servo loops!
The following block diagram is designed to give you an overview of the pa-
rameters of the servo loop:
Speed
controller
Rejection
filter/low-
pass filter
Current
controller
PWM
output
–
–
Actual
speed
value
Actual
current
value
P-component
S-0-0100
Integral-action component of speed controller
S-0-0101
Speed limit value
S-0-0091
Acceleration limit value
S-0-0138
Selection of filter type
P-0-0120
Limit frequency of low pass filter
P-0-0121
Quality of band rejection filter
P-0-0122
Center frequency of band rejection filter
P-0-0123
P-component
S-0-0106, S-0-0119
Integral-action component of
current controller
S-0-0107, S-0-0120
Torque limit value
S-0-0092
Actual value smoothing interval P-0-0013
.
The parameters of the current controller are critical for the drive behav-
ior. They must not be changed without having consulted Bosch.
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01