Method for Determining a Synchronous Speed
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United States of America Patent
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Issued Date -
Aug 15, 2024
app pub date -
Aug 12, 2021
filing date -
Aug 18, 2020
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Abstract
A method for determining a synchronous speed of an electric machine, in particular a speed-controlled asynchronous machine, in a work machine driven by the electric machine is provided. A control device is provided for controlling the speed of the electric machine. The method includes the steps of initiating a detection of at least one mechanical measurement variable in the electric machine and/or the driven work machine to obtain detection information specific to a rotation-induced sound of the electric machine and/or the driven work machine, carrying out a frequency analysis of the detection information to obtain a frequency spectrum of the detection information, carrying out a selection of at least one frequency range in the frequency spectrum on the basis of a clock frequency of the control device, carrying out an identification of at least one peak value in the frequency range to determine at least one frequency specific to the synchronous speed, and carrying out the determination of the synchronous speed using the at least one determined frequency.
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