The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 28, 2017
Filed:
Sep. 08, 2014
Jtekt Corporation, Osaka-shi, Osaka, JP;
So Saito, Kashiwara, JP;
Yuji Kariatsumari, Kitakatsuragi-gun, JP;
JTEKT CORPORATION, Osaka-shi, JP;
Abstract
In a rotation angle detecting device, a first magnetic sensor and a second magnetic sensor are disposed at an interval of an electrical angle of 120 degrees around a rotation center axis of a rotor. An output signal of the first magnetic sensor is expressed by V=sin θ, and an output signal of the second magnetic sensor is expressed by V=sin(θ+120). A determination device determines whether both the magnetic sensors are normal, or there is a failure in at least one of the magnetic sensors, based on whether an expression of L≦V+V+V·V−0.75≦U is satisfied, where L is a lower limit and U is an upper limit.