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:
Dec. 12, 2023
Filed:
Jan. 14, 2021
Nissan Motor Co., Ltd., Yokohama, JP;
Yuta Kaneko, Kanagawa, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Abstract
A diagnostic method of a three-phase AC motor including: applying predetermined voltage in an order of first, second, and third current paths among three current paths in which current flows from a first phase winding to a second phase winding, from the second phase winding to a third phase winding, from the third phase winding to the first phase winding, respectively, via a neutral point; and detecting an abnormality based on current values flowing in these paths, wherein the second current path is a path in which a rate of change of generated torque to change of the rotation angle at a current rotation angle of the motor is greatest among the three paths, and a rotation direction of the motor when the first current path is energized is a direction in which an absolute value of torque generated when starting energization of the second current path decreases.