Pulse Frequency Wobbling - Siemens SINAMICS G150 Operating Instructions Manual

Converter cabinet units 75 kw to 1500 kw

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Table of Contents

Functions, Monitoring, and Protective Functions

9.2 Drive Functions

Function diagram

Pulse frequency wobbling

Pulse frequency wobbling is when the pulse frequency is varied slightly according to a

statistical process. The average pulse frequency value is still the value set; the statistical

variation of the instantaneous value results in a modified noise spectrum.

This procedure reduces the subjectively noticeable motor noise, especially for the relatively

low pulse frequencies set in the factory.

Pulse frequency wobbling is activated with p1810.2 = 1. The amplitude of the static wobbling

signal can be set in the range from 0% to 20% via p1811.

For units connected in parallel, pulse frequency wobbling is activated automatically during

commissioning.

Signals and monitoring functions - thermal monitoring power unit

Power unit overload I2t

CO: Power unit temperatures

Sampling times for internal control loops

Drive filter type, motor side

Power unit overload response

Maximum speed

Fault thermal overload power unit

Thermal overload in power unit alarm

Converter cabinet units

Operating Instructions, 03/2012, A5E03263466A