PROBLEM TO BE SOLVED: To provide a highly reliable magnetostrictive torque sensor or the like.SOLUTION: A magnetostrictive torque sensor 18 includes: a magnetostrictive part provided at a pinion shaft 14; coils 183a, 183b for detection and a bias coil 182 disposed so as to surround the magnetostrictive part; a bias current circuit 184a for supplying bias currents to the bias coil 182; a torque detection IC 184c for calculating steering torque which acts on the pinion shaft 14; power supply wiring having first wiring U1 and second wiring U2; a first capacitor 184d connected to the first wiring U1; a second capacitor 184e connected to the second wiring U2; and a first switching element 184f provided at the second wiring U2 for interrupting power supply from a power source A to the second capacitor 184e when the torque detection IC 184c is started.SELECTED DRAWING: Figure 3
【課題】信頼性の高い磁歪式トルクセンサ等を提供する。【解決手段】磁歪式トルクセンサ18は、ピニオン軸14に設けられる磁歪部と、前記磁歪部を囲むように配置される検出用コイル183a,183b及びバイアスコイル182と、バイアスコイル182にバイアス電流を供給するバイアス電流回路184aと、ピニオン軸14に作用する操舵トルクを演算するトルク検出IC184cと、第1配線U1及び第2配線U2を有する給電配線と、第1配線U1に接続される第1コンデンサ184dと、第2配線U2に接続される第2コンデンサ184eと、第2配線U2に設けられ、トルク検出IC184cの起動時に、電源Aから第2コンデンサ184eへの電力供給を遮断する第1スイッチング素子184fと、を備える。【選択図】図3
MAGNETOSTRICTIVE TORQUE SENSOR AND ELECTRICALLY-DRIVEN POWER STEERING DEVICE HAVING THE SAME
磁歪式トルクセンサ、及びこれを備える電動パワーステアリング装置
2017-01-19
Patent
Electronic Resource
Japanese
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