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:
Oct. 15, 2013
Filed:
Sep. 06, 2011
Hayato Komatsu, Aichi, JP;
Yoshinobu Shimizu, Sakai, JP;
Yuji Kariatsumari, Yamatotakada, JP;
Shingo Maeda, Okazaki, JP;
Yasuyuki Yoshii, Tenri, JP;
Hayato Komatsu, Aichi, JP;
Yoshinobu Shimizu, Sakai, JP;
Yuji Kariatsumari, Yamatotakada, JP;
Shingo Maeda, Okazaki, JP;
Yasuyuki Yoshii, Tenri, JP;
JTEKT Corporation, Osaka-shi, JP;
Abstract
An electric power steering system includes a motor that applies assist force to a steering system, and updates a motor resistance (Rm) that is a value indicating a resistance of the motor. Specifically, the motor resistance (Rm) is updated on the basis of the fact that an induced voltage (EX) of the motor is smaller than a first determination value (GA). In addition, when the induced voltage (EX) is smaller than or equal to a second determination value (GB), a divided value that is obtained by dividing a motor voltage (Vm) by a motor current (Im) is set as a new motor resistance (Rm).