Commissioning
8.8 Drive optimization
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
341
Remark:
In order to determine the magnetization characteristic, during this optimization run the field-
current setpoint is reduced to a minimum value of 8% (starting from 100% of the motor's
rated excitation current as specified in p50102). Setting p50103 to values < 50% of p50102
for the duration of this optimization run limits the value entered for the field-current setpoint
to the minimum value specified in p50103. This may be necessary for uncompensated
motors with an extremely high armature response.
The magnetization characteristic approaches 0 along a linear path (starting from the
measuring point), with the minimum field-current setpoint.
To execute this optimization run, the minimum excitation current for the motor (p50103) must
be set to a lower value than 50% of the motor's rated excitation current (p50102).
WARNING
Unexpected movement of the motor during optimization run
During this optimization run, the drive accelerates to approx. 80% of the rated motor speed.
The maximum armature voltage is 80% of the rated armature voltage of the motor
(p50101).
The movements of the drive can result in death, severe injury or material damage.
•
Observe the general safety instructions.
p50051 = 28
Recording of the friction characteristic
(duration, approx. 1 min)
The following parameters are set automatically:
p50520 to
p50530
Friction characteristic
Remark 1:
The friction characteristic is only active in operation if it is manually
activated with p50223 = 1!
Remark 2:
In order to execute this optimization run, the speed controller must not be
parameterized as a pure P controller or as a controller with droop.
WARNING
Unexpected movement of the motor during optimization run
During this optimization run, the drive accelerates up to its maximum speed.
The movements of the drive can result in death, severe injury or material damage.
•
Observe the general safety instructions.
