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:
Jan. 02, 2018
Filed:
Nov. 16, 2016
Yoji Mori, Aichi, JP;
Yoji Mori, Aichi, JP;
OMRON AUTOMOTIVE ELECTRONICS CO., LTD., Aichi, JP;
Abstract
A multiphase electric motor control device includes: a bridge circuit including phase circuits each including a high potential side switching element, a low potential side switching element, and a current detector, a PWM control unit that outputs PWM signals to the switching elements; a control unit that acquires phase current values at a timing synchronized with a triangle wave; and a current value estimation unit that estimates a phase current value of one phase based on phase current values of other phases. In a case where an ON time of the PWM signal output to the low potential side switching element of the one phase from the PWM control unit is shorter than a predetermined time, the control unit acquires the phase current values which are detected by shifting the timing by using the current detectors of at least the other phases.