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:
Feb. 22, 2022
Filed:
Jan. 11, 2018
Mitsubishi Electric Corporation, Tokyo, JP;
Yoshimasa Nishijima, Tokyo, JP;
Masahiro Iezawa, Tokyo, JP;
Shinji Nishimura, Tokyo, JP;
Ryosuke Shigematsu, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
A rotation angle detection device for accurately detecting a rotation angle is obtained even when electromagnetic noise due to an electrical component(s) and the like of an electric automotive vehicle is superimposed on detection signals of the rotation angle detection device. The device includes a multi-phase/two-phase transformation unit for converting a plurality of detection signals, each being outputted from rotation detectors in accordance with a rotation angle of a rotating body so as to output transformed signals as two-phase signals; an addition-subtraction calculation unit for generating addition-subtraction signals by mutually performing addition to the two-phase signals and subtraction therefrom; an amplitude correction unit for modifying amplitudes of the addition-subtraction signals in accordance with an amplitude correction value, and for outputting post-correction addition-subtraction signals; and an angle calculation unit for calculating an angle based on the post-correction addition-subtraction signals, and for outputting an angular signal.