Siemens SINAMICS Series Operating Instructions Manual page 341

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Electric shock during optimization run

The current limits set are not active during the current controller optimization run. 75% of

the rated armature current for the motor flows for approximately 0.7 s.

If live components are touched then this can result in severe injury or death.

• Observe the general safety instructions.

Motors with a permanent field, a very high level of retentiveness, or a series field must be

locked during this optimization run.

The parameters determined are dependent on the motor temperature. The values set with

the motor in the cold state can serve as a good default setting. For drives with a high

dynamic performance, the optimization run p50051=25 should be repeated after operating

the drive with a load (e.g. with the motor at the operating temperature).

SINAMICS DCM DC Converter

Operating Instructions, 12/2018, A5E34763375A

Optimization of closed-loop armature current control

(takes about 1 min.)

The current controller optimization run may also be executed without a

mechanical load connected; if necessary, the drive should be locked.

The following parameters are set automatically:

p50110, armature resistance (Ra)

p50111, armature inductance (La)

p51591, non-linearity factor of armature inductance (La_fak)

p51592, armature commutation inductance (Lk)

p51594, filter inductance for 12-pulse operation (Ls)

p51595, filter inductance reduction factor (Ls_fak)

p51596, filter resistance in 12-pulse operation (Rs)

p50155, P gain of the armature current controller (Kp)

p50156, integral time of armature current controller (Tn)

p50191 filter time of the current setpoint

Commissioning

8.8 Drive optimization