Title:
RELAY STATE DETERMINATION DEVICE, RELAY STATE DETERMINATION SYSTEM, RELAY STATE DETERMINATION METHOD, AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/129518
Kind Code:
A1
Abstract:
The relay state determination device (10) according to the present invention is provided with: a voltage value acquisition unit (22) that momently measures detected voltage detected from both ends of a shunt resistor (9); a voltage value difference calculation unit (28a) that calculates a voltage value difference (VD) between a first voltage value (V1) when the detected voltage becomes minimum by an armature starting displacement after a primary-side switch is turned off, and a second voltage value (V2) when a secondary-side contact (4b1, 4b2) is opened; and a state determination unit (28b) that determines that a relay (4) has deteriorated when the voltage difference value (VD) falls below a predetermined threshold value (Th).
Inventors:
MATSUO SHINYA (JP)
YAMAZAKI TAKUYA (JP)
YAMAZAKI TAKUYA (JP)
Application Number:
PCT/JP2019/045184
Publication Date:
June 25, 2020
Filing Date:
November 19, 2019
Export Citation:
Assignee:
OMRON TATEISI ELECTRONICS CO (JP)
International Classes:
H01H47/00
Domestic Patent References:
| WO2005111641A1 | 2005-11-24 | |||
| WO2007108063A1 | 2007-09-27 |
Foreign References:
| JP2005513729A | 2005-05-12 | |||
| JP2013089603A | 2013-05-13 |
Other References:
See also references of EP 3901978A4
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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