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:
Aug. 27, 2019
Filed:
Jan. 20, 2016
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Katsuhiro Hoshino, Hitachinaka, JP;
Toshisada Mitsui, Hitachinaka, JP;
Seigo Yukutake, Hitachinaka, JP;
Hideki Miyazaki, Hitachinaka, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
A motor drive control device is a device which drives and controls a permanent magnet synchronous motor in which each phase is independently controlled, and includes a 0-axis current calculation unit which calculates and outputs a 0-axis current ion the basis of a motor current; a 0-axis current determination unit which compares and determines a reference 0-axis current value i, which is the 0-axis current value when the temperature of a permanent magnet provided in the permanent magnet synchronous motor is a reference temperature with the calculated 0-axis current i; and a switching signal generation unit which drives and controls inverters on the basis of the result of comparison determination of the 0-axis current determination unit.