A circuit for actively performing short-circuit and a motor controller are provided. The circuit includes an undervoltage detecting circuit, an emergency power supply, a reverse-flow preventing circuit, and a gate level selecting switch. The undervoltage detecting circuit is configured to detect a driving power supply signal outputted from the driving power supply and output, in a case that an amplitude of the driving power supply signal is lower than a first threshold, an emergency active short-circuit enable signal. In response to the emergency active short-circuit enable signal, the emergency power supply is enabled and the gate level selecting switch is controlled to switch from a first conduction path to a second conduction path, to transmit an emergency power supply signal outputted from the emergency power supply to a bridge arm via the second conduction path. That is, in a case there is a fault in the driving power supply, the emergency power supply may be used to supply power to the bridge arm, thereby ensuring a normal drive of the bridge arm, thus ensuring the security of a vehicle. In addition, a reverse-flow preventing circuit is further arranged between the driving power supply and the emergency power supply, thereby preventing erroneous detection of the undervoltage detecting circuit on the driving power supply signal which is pulled-up by the emergency power supply signal in a case that the emergency power supply is enabled.


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    Title :

    CIRCUIT FOR ACTIVELY PERFORMING SHORT-CIRCUIT AND MOTOR CONTROLLER


    Additional title:

    SCHALTUNG ZUR AKTIVEN DURCHFÜHRUNG EINES KURZSCHLUSSES UND MOTORSTEUERGERÄT
    CIRCUIT POUR L'EXÉCUTION ACTIVE D'UN COURT-CIRCUIT ET ORGANE DE COMMANDE DE MOTEUR


    Contributors:
    CHEN WENJIE (author) / YU ANBO (author)

    Publication date :

    2024-04-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H02P CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS , Steuern oder Regeln von elektrischen Motoren, elektrischen Generatoren, dynamoelektrischen Umformern / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H03K PULSE TECHNIQUE , Impulstechnik



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