The invention relates to a method for protecting safety switches (Q7, Q8, Q9) of a control unit (11) of an electric motor, wherein the control unit (11) has a microcontroller (12) and a gate driver (13), which control a driver circuit (14) having 2n FETs (Q1, Q2, Q3, Q4, Q5, Q6), n being the number of phase windings of the electric motor, and the FETs being arranged in half bridges, and the safety switch being arranged in the middle tap of any half bridge, between the driver circuit (14) and the phase winding of the electric motor, wherein the safety switches are FETs, which are designed to break the electrical connection between the driver circuit (14) and any phase winding in the event of fault, and wherein the method, in the event of an electrical malfunction in the driver circuit (14), comprises the following steps: (a) activating one of the 2n FETs (Q1, Q2, Q3, Q4, Q5, Q6) of the driver circuit (14), (b) measuring the current flow in a supply line (19-) of the driver circuit (14) and detecting a current value, (c) deactivating the activated FET (Q1, Q2, Q3, Q4, Q5, Q6) of the driver circuit (14), (d) successively carrying out a test switching pattern in accordance with steps (a) to (c) for the remaining 2n-1 FETs (Q1, Q2, Q3, Q4, Q5, Q6), (e) evaluating the detected current values for failure to reach a specified threshold value, the highest detected current value being ignored, (f) in the event that the threshold value is not reached, breaking the electrical connection between the driver circuit (14) and at least one of the phase windings (u, v, w) by switching the safety switches (Q7, Q8, Q9). The invention further relates to a electromechanical motor vehicle steering system having a control unit, which is designed to carry out a method of this kind.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    VERFAHREN ZUM SCHUTZ EINES SICHERHEITSSCHALTERS EINER STEUEREINHEIT EINES ELEKTROMOTORS, SOWIE ELEKTROMECHANISCHE KRAFTFAHRZEUGLENKUNG


    Weitere Titelangaben:

    METHOD FOR PROTECTING A SAFETY SWITCH OF A CONTROL UNIT OF AN ELECTRIC MOTOR, AND ELECTROMECHANICAL VEHICLE STEERING
    PROCÉDÉ DE PROTECTION D'UN COMMUTATEUR DE SÉCURITÉ D'UNE UNITÉ DE COMMANDE D'UN MOTEUR ÉLÉCTRIQUE, ET DIRECTION ÉLECTROMÉCANIQUE DE VÉHICULES


    Beteiligte:
    KALAPOS GÁBOR (Autor:in)

    Erscheinungsdatum :

    18.06.2025


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Deutsch


    Klassifikation :

    IPC:    H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / H03K PULSE TECHNIQUE , Impulstechnik / B62D MOTOR VEHICLES , Motorfahrzeuge



    Verfahren zum Schutz eines Sicherheitsschalters einer Steuereinheit eines Elektromotors

    KALAPOS GÁBOR | Europäisches Patentamt | 2021

    Freier Zugriff

    VERFAHREN ZUM SCHUTZ EINES SICHERHEITSSCHALTERS EINER STEUEREINHEIT EINES ELEKTROMOTORS

    KALAPOS GÁBOR | Europäisches Patentamt | 2021

    Freier Zugriff

    Elektromechanische Kraftfahrzeuglenkung sowie Kraftfahrzeug mit einer derartigen Kraftfahrzeuglenkung

    SCHUMANN HEIKO / DREES MARKUS / THIES JOACHIM | Europäisches Patentamt | 2020

    Freier Zugriff

    Steuervorrichtung zur Ansteuerung eines Elektromotors einer Kraftfahrzeuglenkung

    HORVATH GERGELY / VARGA TAMAS | Europäisches Patentamt | 2022

    Freier Zugriff