PROBLEM TO BE SOLVED: To provide a relative angle detection device suitable to enlarge a torque detection range, a torque sensor, an electric power steering device, and a vehicle.SOLUTION: A rotation angle θis is calculated by an inverse tangent function, from a first sin signal sinθis and a first cos signal cosθis according to the rotation angle θis of a first multipolar ring magnet 10 synchronously rotating with an input shaft 22a out of the input shaft 22a and an output shaft 22b arranged coaxially; a rotation angle θos is calculated by an inverse tangent function, from a second sin signal sinθos and a second cos signal cosθos according to the rotation angle θos of a second multipolar ring magnet 11 synchronously rotating with the output shaft 22b; and thereby a relative angle Δθ between the input shaft 22a and the output shaft 22b is calculated from a differential value between the rotation angle θis and the rotation angle θos.SELECTED DRAWING: Figure 6
【課題】トルク検出範囲を拡大するのに好適な相対角度検出装置、トルクセンサ、電動パワーステアリング装置、及び車両を提供する。【解決手段】同軸上に配置されている入力軸22a及び出力軸22bのうち入力軸22aと同期回転する第1多極リング磁石10の回転角度θisに応じた第1sin信号sinθis及び第1cos信号cosθisから逆正接関数によって回転角度θisを演算すると共に、出力軸22bと同期回転する第2多極リング磁石11の回転角度θosに応じた第2sin信号sinθos及び第2cos信号cosθosから逆正接関数によって回転角度θosを演算し、回転角度θisと回転角度θosとの差分値から入力軸22aと出力軸22bとの相対角度Δθを演算する。【選択図】図6
RELATIVE ANGLE DETECTION DEVICE, TORQUE SENSOR, ELECTRIC POWER STEERING DEVICE AND VEHICLE
相対角度検出装置、トルクセンサ、電動パワーステアリング装置及び車両
2017-03-02
Patent
Electronic Resource
Japanese
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