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:
Nov. 20, 2018
Filed:
Nov. 13, 2015
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Hiroshi Ukegawa, Toyota, JP;
Yukio Onishi, Nagoya, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota, JP;
Abstract
A solder degradation information generation apparatus related to a motor drive circuit that includes a power supply, a converter, a smoothing capacitor, and an electric motor is disclosed. The solder degradation information generation apparatus includes a semiconductor element that forms an upper arm of the converter and is bonded to a substrate via a solder, the substrate being cooled by a coolant, a measuring unit configured to measure a temperature of the semiconductor element and a processing device that generates information indicating a degradation state of the solder based on a measurement result of the measuring unit that is obtained during a period in which the smoothing capacitor is charged.