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:
Jul. 05, 2005
Filed:
Jul. 25, 2003
Kazumasa Kodama, Toyota, JP;
Masahiro Miyata, Kariya, JP;
Kazumasa Kodama, Toyota, JP;
Masahiro Miyata, Kariya, JP;
Toyoda Koki Kabushiki Kaisha, Kariya, JP;
Abstract
The terminal voltages of respective phase coils of a steering shaft driving motor constituted by a three-phase brushless motor are separately detected. When the terminal voltages detected at at least three different conducting terminals u, v, and w are made Vu, Vv, and Vw, respectively, and the values when those detected values Vu, Vv, and Vw are arranged in order from largest to smallest voltage are made V, V, and V, respectively, provided that V≧V≧V, a calculation is performed to determine if V+Vcoincides with 2*Vwithin a predetermined allowable range, and a failure is determined based on results obtained from such a calculation.