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:
Sep. 03, 2019
Filed:
Aug. 08, 2016
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
Provided is an electronic control device including inverter circuits of first and second systems for driving a multiphase motor with first and second coil sets by use of upper and lower arm switching elements selectively controlled to be ON/OFF in each coil of the first and second coil sets. The upper arm switching elements of all phases in the inverter circuit of the first system are turned ON to apply a high potential to the first coil set, and the lower arm switching elements of all phases in the inverter circuit of the second system are turned ON to control the second coil set to a low potential. When a value of current flowing through the lower arm switching element in the inverter circuit of the second system is a predetermined value or more, it is determined that a power supply failure has occurred between the first and second systems.