A brushless motor control apparatus calculates the number of rotations of an engine based on a cycle of zero-cross points of the phase voltage induced to a sub-coil of a three-phase brushless motor. When the number of rotation of the engine is smaller than the first number of rotations, before it becomes impossible to detect the zero-cross points, the control state of the three-phase brushless motor is changed from the state of phase control by a phase control regulator unit with respect to the AC output voltages to the state of interphase short circuit of motor coils by a short regulator unit. When the number of rotations of the engine exceeds the first number of rotations and the phase voltage becomes the voltage level such that the zero-cross points can be detected, the control state is changed again to the state of phase control by the phase control regulator unit.


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    Title :

    Brushless motor control apparatus and brushless motor control method


    Contributors:

    Publication date :

    2016-01-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02N STARTING OF COMBUSTION ENGINES , Anlassen von Brennkraftmaschinen / 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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