Jtekt Corporation

Koyo Seiko Company, Ltd.

Shunsuke Nakaura

Yoshitomo Tokumoto

Ken Fukuda

A torque detecting apparatus detects torque applied upon a torsion bar of an electric power steering apparatus, as two sensors, which have ratiometric characteristics and have the same characteristics, simultaneously detect the amount of torsion of the torsion bar. With a gain of one of the two sensors set to the positive polarity and a gain of the other sensor set to the negative polarity, a control circuit calculates the torque applied upon the torsion bar by multiplying a difference between detection outputs from the two sensors by a predetermined coefficient. A torque detecting apparatus which is capable of detecting the torsional angle of a rotation shaft, namely, torque applied upon the rotation shaft easily and accurately using two sensors is thus realized.

Torque detecting apparatus

A torque detecting apparatus which includes two detection systems, each formed with a switching element, a sample hold circuit and an output circuit, to be alternately operated, thereby successively outputting, as a signal, torque detected by a torque detecting coil.

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Gose, Japan

Shunsuke Nakaura