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. 12, 2021
Filed:
Jul. 18, 2019
Yazaki Corporation, Tokyo, JP;
Yoshihiro Kawamura, Makinohara, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
A ground fault detection apparatus is configured to be connected to an ungrounded battery for supplying power to a load via a step-up circuit and to detect ground fault by calculating an insulation resistance of a system provided with the battery, and includes a capacitor that operates as a flying capacitor, a set of switches that switch between a first voltage measurement path including the battery and the capacitor, a second voltage measurement path including the battery, the capacitor and a negative-electrode-side insulation resistor as an insulation resistor between a negative-electrode side of the battery and a ground, a third voltage measurement path including the battery, the capacitor and a positive-electrode-side insulation resistor as an insulation resistor between a positive-electrode side of the battery and the ground, and a capacitor charge voltage measurement path, and a pair of Form C contact relays that can reverse connection direction of the capacitor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile