To provide a torque detector, etc., with which interference between magnetostrictive torque sensors hardly occurs and beat hardly occurs in an output signal and thereby reduce a sense of discomfort of a driver.SOLUTION: The torque detector comprises: a plurality of torque detection units 210 having an excitation coil 223 for performing excitation and provided in the radial periphery of a first magnetostrictive film 211 and a second magnetostrictive film 212 formed in the radial direction of a shaft and a first detection coil 221 and a second detection coil 222 for outputting an output signal that corresponds to a change of inductance that changes in accordance with the magnitude of torque added to the shaft; and a torque detection circuit 250 for detecting the magnitude of torque added to the shaft on the basis of the output signal outputted from the torque detection unit 210. The excitation frequency that is a frequency with which the excitation coil 223 of each of the plurality of torque detection units 250 is excited is set to be different from each other.SELECTED DRAWING: Figure 2
【課題】磁歪式トルクセンサ間に干渉が生じにくく、出力信号にうなりが発生しにくいトルク検出装置等を提供することにより、運転者の違和感を低減させる。【解決手段】軸の径方向に形成された第1磁歪膜211および第2磁歪膜212の径方向周囲に設けられ、励磁を行なう励磁コイル223と軸に加わるトルクの大きさに応じて変化するインダクタンスの変化に応じた出力信号を出力する第1検出コイル221および第2検出コイル222と、を有する複数のトルク検出部210と、トルク検出部210から出力された出力信号を基に、軸に加わるトルクの大きさを検出するトルク検出回路250と、を備え、複数のトルク検出部250のそれぞれの励磁コイル223を励磁する周波数である励磁周波数を互いに異なるように設定するトルク検出装置。【選択図】図2
TORQUE DETECTOR AND POWER STEERING DEVICE
トルク検出装置及びパワーステアリング装置
08.10.2020
Patent
Elektronische Ressource
Japanisch
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