To provide a rotation detector with which it is possible to appropriately carry out the computation of an absolute angle, and an electric power steering device using the same.SOLUTION: Sensor units 130, 230 detect the rotation of a motor 80, and output mechanical angles θm1, θm2 that are the angle of rotation during one rotation and count values TC1, TC2 that pertain to the number of revolutions of the motor 80. Signal acquisition units 171, 271 acquire the mechanical angles θm1, θm2 and the count values TC1, TC2 from the sensor units 130, 230. Absolute angle computation units 172, 272 compute absolute angles θa1, θa2 on the basis of the mechanical angles θm1, θm2 and the count values TC1, TC2. Reference value storage units 174, 274 are nonvolatile storage regions for storing reference values B1, B2 that are used in the correction of computation errors of the absolute angles θa1, θa2 due to detection shift of the count values TC1, TC2. Thus, it is possible to appropriately compute the absolute angles θa1, θa2 immediately after system startup.SELECTED DRAWING: Figure 21

    【課題】絶対角の演算を適切に実施可能な回転検出装置、および、これを用いた電動パワーステアリング装置を提供する。【解決手段】センサ部130、230は、モータ80の回転を検出し、1回転中における回転角度である機械角θm1、θm2、および、モータ80の回転回数に係るカウント値TC1、TC2を出力する。信号取得部171、271は、センサ部130、230から機械角θm1、θm2およびカウント値TC1、TC2を取得する。絶対角演算部172、272は、機械角θm1、θm2およびカウント値TC1、TC2に基づいて絶対角θa1、θa2を演算する。基準値記憶部174、274は、カウント値TC1、TC2の検出ずれによる絶対角θa1、θa2の演算誤差の補正に用いられる基準値B1、B2を記憶する不揮発記憶領域である。これにより、システム起動直後から絶対角θa1、θa2を適切に演算することができる。【選択図】 図21


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    Title :

    ROTATION DETECTOR AND ELECTRIC POWER STEERING DEVICE USING THE SAME


    Additional title:

    回転検出装置、および、これを用いた電動パワーステアリング装置


    Contributors:

    Publication date :

    2019-12-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein / B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen



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