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. 15, 2014
Filed:
Jul. 01, 2010
Hiroshi Suzuki, Okazaki, JP;
Naoki Yamano, Okazaki, JP;
Terutaka Tamaizumi, Okazaki, JP;
Akira Nambu, Okazaki, JP;
Hiroshi Suzuki, Okazaki, JP;
Naoki Yamano, Okazaki, JP;
Terutaka Tamaizumi, Okazaki, JP;
Akira Nambu, Okazaki, JP;
JTEKT Corporation, Osaka, JP;
Abstract
A motor control signal output unit of an electric power steering system includes a feedback gain calculation unit (), and a feedback control unit executes a feedback control with the use of a proportional gain (Kp) and an integral gain (Ki) that are calculated by the feedback gain calculation unit (). The feedback gain calculation unit () sets the feedback gains to large values (Kp=P, Ki=I) when the absolute value of an assist gradient (α) is equal to or smaller than a predetermined value (α) (|α|≦α). On the other hand, when the absolute value of the assist gradient (α) exceeds the predetermined value (α) (|α|>α), the feedback gain calculation unit () sets the feedback gains to small values (Kp=p, Ki=I:P<P, I<I).