PROBLEM TO BE SOLVED: To provide a magnetostrictive torque sensor and an electrically driven power steering device with which it is possible to suppress a reduction in the accuracy of detecting a torque applied to a shaft.SOLUTION: A magnetostrictive torque sensor 10 constituting an electrically driven power steering device 12A is configured such that the temperature characteristic change of the first impedance of a first magnetic path including a first detection coil 76 and the temperature characteristic change of the third impedance of a third magnetic path including a third detection coil 80 are mutually different, and the temperature characteristic change of the second impedance of a second magnetic path including a second detection coil 78 and the temperature characteristic change of the fourth impedance of a fourth magnetic path including a fourth detection coil 82 are different from each other.SELECTED DRAWING: Figure 3
【課題】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12Aを構成する磁歪式トルクセンサ10は、第1検出コイル76を含む第1磁気経路の第1インピーダンスの温度特性変化と第3検出コイル80を含む第3磁気経路の第3インピーダンスの温度特性変化とが互いに異なると共に、第2検出コイル78を含む第2磁気経路の第2インピーダンスの温度特性変化と第4検出コイル82を含む第4磁気経路の第4インピーダンスの温度特性変化とが異なる。【選択図】図3
MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRICALLY DRIVEN POWER STEERING DEVICE
磁歪式トルクセンサ及び電動パワーステアリング装置
2016-10-06
Patent
Electronic Resource
Japanese
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