Invention Grant
- Patent Title: Abnormality detection method for electromagnetic relay, abnormality detection circuit for electromagnetic relay, and abnormality detection system
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Application No.: US15113366Application Date: 2014-08-05
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Publication No.: US10424449B2Publication Date: 2019-09-24
- Inventor: Norikazu Nishio
- Applicant: OMRON Corporation
- Applicant Address: JP Kyoto-shi
- Assignee: OMRON Corporation
- Current Assignee: OMRON Corporation
- Current Assignee Address: JP Kyoto-shi
- Agency: Metrolex IP Law Group, PLLC
- Priority: JP2014-037294 20140227
- International Application: PCT/JP2014/070619 WO 20140805
- International Announcement: WO2015/129070 WO 20150903
- Main IPC: H01H47/00
- IPC: H01H47/00 ; G01R31/327
Abstract:
An abnormal operation of a movable contact is correctly detected. The abnormal operation of the movable contact (9) to the fixed contact (10) is detected based on at least one of a separation transient response signal of a coil current passed through the excitation coil (6) during the supply of a separation pulse signal and an attraction transient response signal of the coil current during the supply of an attraction pulse signal.
Public/Granted literature
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