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:
May. 18, 2021
Filed:
Feb. 21, 2020
Fuji Electric Co., Ltd., Kanagawa, JP;
Masaki Hirakata, Tokyo, JP;
FUJI ELECTRIC CO., LTD., Kawasaki, JP;
Abstract
An inverter device includes gate driving circuits for upper and lower arms of a bridge circuit, a first power supply supplying a power supply voltage to each driving circuit, and a second power supply having a reference potential different from that of the first power supply. The inverter device also includes a first fail-safe circuit having a reference potential common to the first power supply and generating driving commands with respect to the upper and lower arms, and a second fail-safe circuit having a reference potential common to the second power supply and generating driving commands with respect to the upper or lower arm. The lower arm gate driving circuit has two driving command input functions having different reference potentials, one function inputs the driving commands from the first fail-safe circuit, and the other function inputs the driving commands from the second fail-safe circuit.