Table of Contents
Advertisement
P051 = 26
If field weakening is selected (P081 = 1), or if closed-loop torque control (P170=1) or torque limiting
(P169=1) is selected or if a variable field current setpoint is applied the optimization run for field weakening
must be run:
P051 = 27
8-14
Speed controller optimization run (process lasts approximately 6s).
The following parameters are set automatically: P225, P226 and P228.
Note:
The speed controller optimization run takes only the filtering of the actual speed controller
value parameterized in P200 into account and, if P083=1, filtering of the main actual value
parameterized in P745.
When P200 < 20ms, P225 (gain) is limited to a value of 30.00.
The speed controller optimization run sets P228 (speed setpoint filter) to the same value
as P226, speed controller integration time, for the purpose of achieving an optimum control
response to abrupt setpoint changes. In many process applications, it may be better to set
P228 = 0 so that the actual speed follows the process setpoint with less delay.
WARNING
During the speed controller optimization run, the motor is accelerated
at a maximum of 45% of its rated armature current. The motor may
reach speeds of up to approximately 20% of maximum speed.
Optimization run for field weakening (process lasts approx. 1min).
The following parameters are set automatically: P117 to P139, P275 and P276.
Note:
In order to determine the magnetization characteristic, the field current setpoint is reduced
during the optimization run from 100% of the motor rated field current as set in P102 down
to a minimum of 8%. The field current setpoint is limited to a minimum according to P103 by
setting P103 to values < 50% of P102 for the duration of the run. This might be necessary in
the case of uncompensated motors with a very high armature reaction.
The magnetizing characteristic is approximated linearly to 0, starting from the measuring
point, at a minimum field current setpoint.
To execute this optimization run, the minimum motor field current, P103, must be
parameterized to less than 50% of the rated motor field current (P102).
WARNING
During this optimization run, the motor accelerates to approximately
80% of rated motor speed (the armature voltage corresponds to
maximum 80% of the rated motor armature voltage (P101)).
SIMOREG DC Master Base Drive Panel Operating Instructions
Siemens Energy & Automation
Advertisement
Table of Contents
