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:
Feb. 27, 2024
Filed:
Jul. 12, 2022
Denso Corporation, Kariya, JP;
Yusaku Kawaguchi, Kariya, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
A motor control device includes a motor, a drive circuit, a current detection unit, and a control unit. The motor has a plurality of phases of motor windings. The drive circuit is provided on a low potential side of the motor windings. The current detection unit has current detection resistors corresponding to each phase, and is provided on a low potential side of the drive circuit. The control unit includes an actuator control unit and an abnormality diagnosis unit. The abnormality diagnosis unit determines that the current detection unit is abnormal, when a difference between a maximum current, which is a maximum value of the phase current when a same duty ratio is commanded to each phase, and a minimum current, which is a minimum value of the phase current when a same duty ratio is commanded to each phase, is equal to or greater than an abnormality determination threshold.