Centrifuge rotor positioning method, involves controlling rotor with voltage or frequency characteristic controller by using three phase asynchronous motor, where characteristic controller is subordinated by control loop

The method involves controlling a rotor (5) of a centrifuge (6) with a voltage or frequency characteristic controller (29) by a frequency converter by using a three phase asynchronous motor (1), where the voltage or frequency characteristic controller is subordinated by a control loop. The control l...

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Bibliographische Detailangaben
Hauptverfasser:	BEHRMANN, VOLKER, KOPP, DIETMAR, LANDRATH, JOACHIM
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL ORCHEMICAL PROCESSES CENTRIFUGES 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 PERFORMING OPERATIONS TRANSPORTING
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Beschreibung
Zusammenfassung:	The method involves controlling a rotor (5) of a centrifuge (6) with a voltage or frequency characteristic controller (29) by a frequency converter by using a three phase asynchronous motor (1), where the voltage or frequency characteristic controller is subordinated by a control loop. The control loop supplies an actual current from a current source of the frequency converter. A probe is arranged in the rotor of the centrifuge, and is positioned in a predetermined probe processing position. An independent claim is also included for a centrifuge with a device for positioning a rotor in a predetermined idle position. Die Erfindung betrifft ein Verfahren zur Positionierung eines Rotors (50) einer Zentrifuge (60) in mindestens eine vorbestimmte Ruheposition (R1-Rn), wobei der Rotor (50) mittels eines Dreiphasen-Drehstromasynchronmotors (1) durch einen Frequenzumrichter (27) mit einer Spannungs-/Frequenz-Kennliniensteuerung (29) angesteuert wird, welche einen Drehzahlregler (11) aufweist, wobei der Drehzahlregler (11) der Spannungs-/Frequenz-Kennliniensteuerung (29) von einem Stromregler (16) unterlagert wird.