PROBLEM TO BE SOLVED: To provide a technique by which steering angles can be calculated accurately based on rotation angles of a motor.SOLUTION: The electric power steering device comprises: an input shaft that rotates in interlocking with a steering wheel; a handle-side pinion shaft that is connected to the input shaft through a torsion bar and has a pinion formed therein; an assist-side pinion shaft that is driven by rotation of an electric motor and has a pinion formed therein; a rack shaft that has rack teeth, which engage with the pinions formed in the handle-side pinion shaft and the assist-side pinion shaft; a torque detecting device 40 that detects steering torque of the steering wheel on the basis of torsion angles of the torsion bar; a resolver 35 that detects rotation angles of an electric motor 30M; a motor rotation angle calculating portion 110; and a steering angle calculating portion 120 that calculates the rotation angles or steering angles α of the steering wheel on the basis of detected motor rotation angles β and the torsion angles of the torsion bar calculated based on output values from the torque detecting device 40.SELECTED DRAWING: Figure 5

    【課題】モータ回転角度に基づいて精度よく操舵角を算出することができる技術を提供する。【解決手段】ステアリングホイールと連動して回転する入力軸と、入力軸とトーションバーを介して連結されるとともにピニオンが形成されたハンドル側ピニオン軸と、電動モータの回転により駆動されるとともにピニオンが形成されたアシスト側ピニオン軸と、ハンドル側ピニオン軸及びアシスト側ピニオン軸に形成されたピニオンと噛み合うラック歯が形成されたラック軸と、トーションバーの捩れ角度に基づいてステアリングホイールの操舵トルクを検出するトルク検出装置40と、電動モータ30Mの回転角度を検出するレゾルバ35,モータ回転角度算出部110と、検出したモータ回転角度βと、トルク検出装置40からの出力値に基づいて算出したトーションバーの捩れ角度とに基づいてステアリングホイールの回転角度である操舵角αを算出する操舵角算出部120とを備える。【選択図】図5


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    Title :

    ELECTRIC POWER STEERING DEVICE AND STEERING ANGLE CALCULATION METHOD


    Additional title:

    電動パワーステアリング装置、操舵角算出方法


    Contributors:

    Publication date :

    2016-10-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01L Messen von Kraft, mechanischer Spannung, Drehmoment, Arbeit, mechanischer Leistung, mechanischem Wirkungsgrad oder des Drucks von Fluiden , MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE



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