PROBLEM TO BE SOLVED: To provide a relative angle detection device that is suitable for enlarging a torque detection range, and to provide a torque sensor, electrically-driven power steering device and vehicle that include the relative angle detection device.SOLUTION: On the basis of a first sign expressing sin(θ+Δθ) corresponding to a rotation angle θof a first multi-polar magnet 10 rotating in synchronization with an input axis 22a of the input axis 22a and an output axis 22b coaxially arranged, and a first cosine signal expressing cos(θ+Δθ), and a second sign expressing sinθcorresponding to a rotation angle θof a second multi-polar magnet 11 rotating in synchronization with the output axis 22b, and a second cosine signal expressing cosθ, sinΔθ and cosΔθ are computed that correspond to a relative angle Δθ between the input axis 22a and output axis 22b, and the relative angle Δθ is computed from Δθ=arctan(sinΔθ/cosΔθ).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、この相対角度検出装置を備えるトルクセンサ、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sin(θos+Δθ)を表す第1サイン信号及びcos(θos+Δθ)を表す第1コサイン信号と、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sinθosを表す第2サイン信号及びcosθosを表す第2コサイン信号に基づき、入力軸22aと出力軸22bとの相対角度Δθに応じたsinΔθ及びcosΔθを演算し、Δθ=arctan(sinΔθ/cosΔθ)から相対角度Δθを演算する。【選択図】図6
RELATIVE ANGLE DETECTION DEVICE, TORQUE SENSOR, ELECTRICALLY-DRIVEN 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
2017-01-19
Patent
Electronic Resource
Japanese
IPC: | 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 / B62D MOTOR VEHICLES , Motorfahrzeuge / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01D MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE , Anzeigen oder Aufzeichnen in Verbindung mit Messen allgemein |
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