TORQUE SENSOR AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME

Title:

TORQUE SENSOR AND ELECTRIC POWER STEERING DEVICE EQUIPPED WITH SAME

Document Type and Number:

WIPO Patent Application WO/2016/129572

Kind Code:

A1

Abstract:

[Problem] To provide a torque sensor for detecting torque by exciting a detection coil in which the impedance varies according to the torque generated, wherein noise generated due to excitation can be reliably eliminated, without affecting the frequency component to be used as a torque signal; and an electric power steering device equipped with said sensor, said device reducing pulsation and other such uncomfortable vibration, and improving the steering feel. [Solution] Provided is a torque sensor for detecting torque using a detection coil in which the impedance varies according to torque generated in a rotating shaft, wherein the sensor is equipped with an oscillator unit for exciting a detection coil at a prescribed excitation frequency, and a detection unit for detecting torque on the basis of a signal generated by variation of the impedance of the excited detection coil. The detection unit is provided with an excitation component elimination unit having a narrow stopband, for eliminating from a signal a frequency component calculated from the excitation frequency.

Inventors:

TSUBAKI TAKAHIRO (JP)

Application Number:

PCT/JP2016/053729

Publication Date:

August 18, 2016

Filing Date:

February 09, 2016

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NSK LTD (JP)

International Classes:

G01L3/10; B62D5/04; B62D6/10

Domestic Patent References:

WO2012176358A1

2012-12-27

Foreign References:

JP2001124640A	2001-05-11
JPH08271359A	1996-10-18
JPS63262536A	1988-10-28
JPH06323930A	1994-11-25