METHOD FOR DETERMINING A SYNCHRONOUS SPEED

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 i...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	JANJIC, Boris, KLUNKE, Tobias, MADES, Jochen
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BLASTING CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION HEATING LIGHTING MECHANICAL ENGINEERING METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS NON-POSITIVE DISPLACEMENT PUMPS PHYSICS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS SOUND-PRODUCING DEVICES WEAPONS
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Beschreibung
Zusammenfassung:	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.