A sampling period of information according to a load state of an alternating-current motor is controlled so as to be variable with respect to a carrier period of a PWM circuit, and a predetermined arithmetic operation for aggregating information sampled in one period of the carrier period is performed in a separate arithmetic circuit from a CPU. Thereby, in a situation where the rotation of the alternating-current motor becomes too fast with respect to the carrier period, motor rotation control for suppressing a sudden fluctuation of a motor load can be performed by faster reaction while suppressing an increase in an arithmetic control load of a CPU.


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    Title :

    Motor control device and motor drive device


    Contributors:

    Publication date :

    2018-07-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    H03M Codieren, Decodieren oder Codeumsetzung allgemein , CODING, DECODING OR CODE CONVERSION, IN GENERAL / 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



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