There is provided a current detection device including a current detection unit (35a to 35f) configured to detect current flowing through a switching element of a lower-side arm (or an upper-side arm); a correction value calculation unit (50b) configured to calculate an offset correction value, based on a detection value of the current detected by the current detection unit in a period during which the switching element off during PWM control, and to hold and update the calculated offset correction value; and a correction unit (50c) configured to correct, by the offset correction value held by the correction value calculation unit, the detection value of the current detected by the current detection unit in a period during which the switching element is on. The correction value calculation unit (50b) is configured to not update the offset correction value in a case where a duty ratio of the PWM control is equal to or less than a duty ratio lower limit value (or equal to or greater than a duty ratio upper limit value).


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    Title :

    CURRENT DETECTION DEVICE, MOTOR CONTROL DEVICE, AND ELECTRIC POWER STEERING DEVICE


    Additional title:

    STROMDETEKTIONSVORRICHTUNG, MOTORSTEUERUNGSVORRICHTUNG UND ELEKTRISCHE SERVOLENKVORRICHTUNG
    DISPOSITIF DE DÉTECTION DE COURANT, DISPOSITIF DE COMMANDE DE MOTEUR ET DISPOSITIF DE DIRECTION ASSISTÉE ÉLECTRIQUE


    Contributors:

    Publication date :

    2025-01-29


    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 / B62D MOTOR VEHICLES , Motorfahrzeuge / G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen



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