Vibrations with SLPSM if fdmax=C59 is higher than 650Hz

Corrected from:
Inverter Drives 8400 StateLine V16.00.00
Inverter Drives 8400 HighLine V16.00.00
Inverter Drives 8400 TopLine V16.00.00

Response of the new version:
No vibrations in the speed range higher than 650 Hz.

What happens?
Motor vibrations in the speed monitoring range.

When does this behaviour occur?
The behaviour occurs when selecting a frequency C0059 > 650Hz in the SLPSM control mode and travelling in this speed range.

Which products are affected?
Inverter Drives 8400 StateLine FW V14.00.00/V15.00.00
Inverter Drives 8400 HighLine FW V14.00.00/V15.00.00
Inverter Drives 8400 TopLine FW V14.00.00/V15.00.00

Short-term measures:
Reduce the PLL gain C0999 for fdmax=C0059 by factor 2

Evaluation/recommendations:
The vibrations may lead to high currents and voltages. High speed accuracy is no longer given.


URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/201500465/1/
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