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. 09, 2016
Filed:
Apr. 05, 2013
Yazaki Corporation, Minato-ku, Tokyo, JP;
Keisuke Ueta, Shizuoka, JP;
Akinori Maruyama, Shizuoka, JP;
Yoshihide Nakamura, Shizuoka, JP;
Yoshinori Ikuta, Shizuoka, JP;
YAZAKI CORPORATION, Tokyo, JP;
Abstract
A switching circuit protector switches a semiconductor device () provided in a switching circuit connecting a power supply (VB) to a load (RL), from a PWM drive state to a DC drive state when an estimated temperature of a cable of the switching circuit estimated by a temperature estimator () exceeds a threshold temperature (Tth), in the state where the semiconductor device () is controlled to operate in the PWM drive state to drive the load (RL). Therefore, when an overcurrent is caused in the cable, the estimated temperature exceeds the threshold temperature (Tth) so as to break the semiconductor device (). Accordingly, the switching circuit can surely be protected by the switching circuit protector.