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:
Sep. 18, 2018
Filed:
Feb. 16, 2016
Jtekt Corporation, Osaka-shi, Osaka, JP;
Toshiaki Murakami, Nagoya, JP;
JTEKT CORPORATION, Osaka-shi, JP;
Abstract
A temperature detection apparatus and a rotation angle detection apparatus are provided that allow a temperature of a resolver to be calculated in real time. A rotation angle detection apparatus () (temperature detection apparatus) includes a resolver () with an excitation coil and output coils wound thereon, the excitation coil being subjected to an excitation voltage (VA) and the output coil outputting voltage signals (VB, VC) corresponding to the excitation voltage (VA), and a temperature calculation circuit (sensor microcomputer ()) that detects a phase of the excitation voltage (VA) and that detects a phase of an excitation current (IA). The temperature calculation circuit (sensor microcomputer ()) calculates a temperature of the resolver () based on a phase difference between the excitation voltage (VA) and the excitation current (IA).