Invention Grant
- Patent Title: Switching circuit protector
- Patent Title (中): 开关电路保护器
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Application No.: US14391833Application Date: 2013-04-05
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Publication No.: US09413159B2Publication Date: 2016-08-09
- Inventor: Keisuke Ueta , Akinori Maruyama , Yoshihide Nakamura , Yoshinori Ikuta
- Applicant: YAZAKI CORPORATION
- Applicant Address: JP Tokyo
- Assignee: YAZAKI CORPORATION
- Current Assignee: YAZAKI CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Mots Law, PLLC
- Priority: JP2012-098899 20120424
- International Application: PCT/JP2013/002369 WO 20130405
- International Announcement: WO2013/161198 WO 20131031
- Main IPC: H02H3/08
- IPC: H02H3/08 ; H02H9/02 ; H02H5/04
Abstract:
A switching circuit protector switches a semiconductor device (11) 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 (22) exceeds a threshold temperature (Tth), in the state where the semiconductor device (11) 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 (11). Accordingly, the switching circuit can surely be protected by the switching circuit protector.
Public/Granted literature
- US20150138682A1 SWITCHING CIRCUIT PROTECTOR Public/Granted day:2015-05-21
Information query
