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:
Jun. 05, 2018
Filed:
Oct. 13, 2016
Jtekt Corporation, Osaka-shi, Osaka, JP;
Naoki Yamano, Okazaki, JP;
Hidenori Itamoto, Tajimi, JP;
Takashi Kodera, Okazaki, JP;
Yoshihiro Yamashita, Okazaki, JP;
Koji Anraku, Okazaki, JP;
JTEKT CORPORATION, Osaka-shi, JP;
Abstract
An update amount calculation processing circuit manipulates a control angle based on an update amount in order to perform feedback-control for causing a steering torque to be adjusted to a target torque. In this case, the update amount calculation processing circuit executes a guard process on the update amount with reference to an estimated amount of change that is a speed equivalent value based on estimation by an induced voltage observer. However, when a command current set by a command current setting processing circuit is zero, the update amount calculation processing circuit determines the estimated amount of change subjected to the guard process to be the update amount. When the command current is zero and the update amount is fixed to a guard value, an electric path between the synchronous motor and a battery is blocked.