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. 23, 2011
Filed:
Jul. 11, 2006
Applicant:
Takayoshi Endou, Hiratsuka, JP;
Inventor:
Takayoshi Endou, Hiratsuka, JP;
Assignee:
Komatsu Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/08 (2006.01); G01R 31/00 (2006.01); G01R 19/00 (2006.01); H02J 7/00 (2006.01); H02H 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A leakage detection can be correctly performed both in a DC high voltage circuit and in an AC high voltage circuit in a vehicle-mounted power supply system. Under a state where a contactoris turned off, all IGBT elements (switching elements)in an IGBT inverter circuitare turned on, and an AC signal Vs is applied to an applying point P. Then, a voltage measured at a voltage measurement point Q is compared with a threshold value to detect whether or not the leakage exists.
Endou, Takayoshi. (2011). Leakage detection device of vehicle mounted power supply system (U.S. Patent No. 8004285). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/8004285
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile