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. 28, 2026
Filed:
Jan. 12, 2024
Nsk Steering & Control, Inc., Tokyo, JP;
NSK STEERING & CONTROL, INC., Tokyo, JP;
Abstract
A switching control unit, when a target duty ratio of a first phase, the first phase being a phase having the highest target duty ratio among a plurality of phases of a polyphase inverter, is greater than a predetermined first threshold value set to less than 100%, drives a switching element of the first phase at a duty ratio of 100% and also drives a switching element of a second phase, the second phase being a phase other than the first phase, at a corrected duty ratio obtained by correcting to increase a target duty ratio of the second phase, and a voltage command value limiting unit limits a q-axis voltage command value and a d-axis voltage command value in such a way that the corrected duty ratio does not exceed a predetermined second threshold value set to less than 100%.