Resonance Damping; Slip Limit; Co: V/F Slip Frequency; Resonance Damping Gain V/F - Siemens MICROMASTER 440 Parameter Manual

Issue 01/06
P1336[3]

Slip limit

CStat: CUT
P-Group: CONTROL
Compensation slip limit in [%] relative to r0330 (rated motor slip), which is added to frequency setpoint.
Index:
P1336[0] : 1st. Drive data set (DDS)
P1336[1] : 2nd. Drive data set (DDS)
P1336[2] : 3rd. Drive data set (DDS)
Dependency:
Slip compensation (P1335) active.
r1337

CO: V/f slip frequency

P-Group: CONTROL
Displays actual compensated motor slip as [%]
Dependency:
Slip compensation (P1335) active.
3.29.1.2

Resonance damping

P1338[3]

Resonance damping gain V/f

CStat: CUT
P-Group: CONTROL
Defines resonance damping gain for V/f. Here, di/dt of the acitve current will be scaled by P1338 (see
diagram below). If di/dt increases the resonance damping circuit decreases the inverter output frequency.
i
active
Index:
P1338[0] : 1st. Drive data set (DDS)
P1338[1] : 2nd. Drive data set (DDS)
P1338[2] : 3rd. Drive data set (DDS)
Note:
- The resonance damping function is used to dampen oscillations in the active current. These especially
occur when rotating field motors are operating under no-load conditions. The parameter is not used to
optimize the stabilizing behavior.
- In the V/f control modes (refer to P1300), the resonance damping controller is activate in a range from
approximately 5 % up to 70 % of the rated motor frequency (P0310).
- An excessively high value results in instability (positive feedback).
MICROMASTER 440 Parameter List
6SE6400-5BB00-0BP0
Datatype: U16 Unit: %
Active: Immediately QuickComm.: No
Datatype: Float Unit: %
Datatype: Float Unit: -
Active: Immediately QuickComm.: No
P1338
f
P 1338
res damping
T
-
Parameter Description
Level
Min: 0
2
Def: 250
Max: 600
Level
Min: -
3
Def: -
Max: -
Level
Min: 0.00
3
Def: 0.00
Max: 10.00
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