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. 17, 2013
Filed:
Oct. 21, 2008
Takanobu Takamatsu, Habikino, JP;
Ryouichi Suzuki, Ebina, JP;
Yuuichi Fukuyama, Yokohama, JP;
Yuji Takatsuka, Kobe, JP;
Takanobu Takamatsu, Habikino, JP;
Ryouichi Suzuki, Ebina, JP;
Yuuichi Fukuyama, Yokohama, JP;
Yuji Takatsuka, Kobe, JP;
JTEKT Corporation, Osaka, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
An electric power steering apparatus is provided that has a controller by which no current flows in one phase among current paths of three phases for supplying electric power from a motor driving circuit to a three-phase brushless motor and currents that have an identical absolute value and that have different signs flow in the other two phases. Thus, the status at one energization angle on the driving current waveform of the three-phase brushless motor can be given continuously and relatively-high currents can simultaneously flow in opposite directions in the contacts inserted to the two phases. By flowing of such high current in the contacts, a secure conduction check can be performed and foreign matters on the surface of the contact can be fused or thermally destroyed.