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. 01, 2018
Filed:
Sep. 09, 2015
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, Ibaraki, JP;
Hiroyuki Saito, Isesaki, JP;
Haruhiko Fujita, Machida, JP;
HITACHI AUTOMOTIVE SYSTEMS, LTD., Hitachinaka-Shi, JP;
Abstract
In a multilayer printed circuit board (circuit board) having an inverter (switching elements) mounted thereto, only a second wiring pattern Parranged downstream of a semiconductor relaysand able to shut off an electric power supply and a third wiring pattern Parranged upstream of a shunt resistorand able to detect an overcurrent are placed in adjacent layers in a manner to face each other, and thus, even if the mutually facing portions (laminated portion) of the these two wiring patterns Pand Pare subjected to short circuit, an overcurrent caused by the short circuit can be detected by the shunt resistorand the electric power supply to the switching elementscan be shut off by the switching elements, so that overheating at the second and third wiring patterns Pand Pcan be avoided.