PROBLEM TO BE SOLVED: To provide a magnetostrictive torque sensor having a simple structure and being capable of reducing a temperature differential along an axial direction of a magnetostrictive film and thus minimizing degradation of accuracy in detection of torque applied to a shaft, and to provide an electric power steering device.SOLUTION: A magnetostrictive torque sensor 10 constituting an electric power steering device 12 includes a shaft 70, of which a non-magnetostrictive-film-coated portion 84 adjacent to a magnetostrictive-film-coated portion 80 coated with a magnetostrictive film 72 has a thermal resistance greater than that of the magnetostrictive-film-coated portion 80.SELECTED DRAWING: Figure 3

    【課題】簡易な構成で磁歪膜の軸線方向の温度差を小さくすることができ、これによって、シャフトに加えられたトルクの検出精度の低下を抑えることができる磁歪式トルクセンサ及び電動パワーステアリング装置を提供する。【解決手段】電動パワーステアリング装置12を構成する磁歪式トルクセンサ10において、シャフト70のうち磁歪膜72が配設された磁歪膜配設部位80に対して軸線方向に隣接する磁歪膜非配設部位84の熱抵抗は磁歪膜配設部位80の熱抵抗よりも大きい。【選択図】図3


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    Title :

    MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRIC POWER STEERING DEVICE


    Additional title:

    磁歪式トルクセンサ及び電動パワーステアリング装置


    Contributors:

    Publication date :

    2016-06-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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



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