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:
Jun. 10, 2014
Filed:
Sep. 09, 2010
Yuuichi Hara, Yokohama, JP;
Noriko Hoshino, Kawasaki, JP;
Tsuyoshi Morita, Zama, JP;
Nissan Motor Co., Ltd., Yokohama-shi, JP;
Abstract
Disclosed are abnormality detecting apparatus and method for a high-voltage circuit (A), in which: a square wave pulse is outputted to a measuring point (p) with a switch (SW) set off, the switch (SW) provided between an inverter circuit () and the ground, a difference voltage (Vp-p) between a voltage (Vh) detected at a phase of T/2 and a voltage (V) detected at a phase of T is obtained, the occurrence of a ground fault is detected based on the size of the difference voltage (Vp-p); and the square wave pulse is outputted to the measuring point (p) with the switch (SW) set on, and it is judged that a loosening of a fastening section (p) occurs when the difference voltage (Vp-p) exceeds a reference voltage (Vref).