The invention relates to a method for monitoring the operating mode of an electric asynchronous machine with a variable rotational speed, said asynchronous machine being used for driving and braking purposes in a rail vehicle. The asynchronous machine is supplied with voltage or current by an inverter, wherein the operating mode of the asynchronous machine is set and regulated by setting the phase position of the supplied voltage or current. According to the invention, the sign of the electric slip frequency of the asynchronous machine is ascertained. Furthermore, the sign of the rotational speed of the asynchronous machine is ascertained, and the sign of the slip frequency is compared with the sign of the rotational speed of the asynchronous machine. If the rotational speed and the slip frequency have the same sign, the drive mode is detected. If the rotational speed and the slip frequency have different signs, the braking mode is detected. The sign of a variable which is proportional to the slip frequency is ascertained from the stator currents and the rotational speed of the asynchronous machine.


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    Title :

    VERFAHREN ZUR ÜBERWACHUNG DER BETRIEBSART EINER DREHZAHL-VERÄNDERLICHEN ELEKTRISCHEN ANTRIEBSMASCHINE


    Additional title:

    METHOD FOR MONITORING THE OPERATING MODE OF AN ELECTRIC DRIVE MACHINE WITH A VARIABLE ROTATIONAL SPEED
    PROCÉDÉ DE SURVEILLANCE DU MODE DE FONCTIONNEMENT D'UNE MACHINE ÉLECTRIQUE À VITESSE DE ROTATION VARIABLE


    Contributors:

    Publication date :

    2023-12-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    German


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern