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:
Apr. 10, 2012
Filed:
Jan. 27, 2009
Hayato Komatsu, Ama-gun, JP;
Akira Tanizawa, Yao, JP;
Masaya Segawa, Nara, JP;
Yuji Kariatsumari, Yamatotakada, JP;
Hayato Komatsu, Ama-gun, JP;
Akira Tanizawa, Yao, JP;
Masaya Segawa, Nara, JP;
Yuji Kariatsumari, Yamatotakada, JP;
JTEKT Corporation, Osaka-shi, JP;
Abstract
A low speed region position estimating portion is designed to be suitable for when the motor is operating in a low speed region, and estimates a low speed estimated rotational position θ^. A high speed region position estimating portion is designed to be suitable for when the motor is operating in a high speed region, and estimates a high speed estimated rotational position θ^. A dividing portion obtains a divided estimated rotational position θ^by internally dividing the low speed estimated rotational position θ^and the high speed estimated rotational position θ^. A rotation speed calculating portion obtains a rotation speed ω of a rotor based on an output signal from a steering sensor. The rotational position of the rotor is then obtained by selecting one of i) the low speed estimated rotational position θ^, the high speed estimated rotational position θ^, or the divided estimated rotational position θ^, based on that rotation speed ω.