Title:
CURRENT DETECTION DEVICE
Document Type and Number:
Japanese Patent JP2020197396
Kind Code:
A
Abstract:
To detect abnormality in a current transformer by a simple configuration.SOLUTION: A current detection device includes: a current transformer mounted on a wire to which load can be electrically connected and disconnected; a measurement circuit which is connected between terminals of a coil of the current transformer and has a voltage dividing resistor connected in parallel with the coil with respect to a voltage source; a switch which is connected in series with the voltage dividing resistor and connected in parallel with the coil with respect to the voltage source; and a control device which performs a current detection operation for detecting a current flowing through the wire based on a measurement value measured by the measurement circuit while the switch is on, and performs an abnormality determination operation for determining the presence/absence of disconnection of the current transformer based on a measurement value measured by the measurement circuit while the switch is off.SELECTED DRAWING: Figure 3
Inventors:
IGARASHI SHOTA
ANDO YASUAKI
YAMASHITA KIYOMI
YAI KATSUNORI
ANDO YASUAKI
YAMASHITA KIYOMI
YAI KATSUNORI
Application Number:
JP2019102069A
Publication Date:
December 10, 2020
Filing Date:
May 31, 2019
Export Citation:
Assignee:
AISIN SEIKI
International Classes:
G01R31/50; G01R15/18; G01R19/00; G01R19/15; G01R35/00
Domestic Patent References:
| JP2002044856A | 2002-02-08 | |||
| JP2009025055A | 2009-02-05 | |||
| JP2018179787A | 2018-11-15 | |||
| JPH08162332A | 1996-06-21 | |||
| JPH1114691A | 1999-01-22 | |||
| JP2014511474A | 2014-05-15 | |||
| JP2015015845A | 2015-01-22 |
Foreign References:
| US5066920A | 1991-11-19 |
Attorney, Agent or Firm:
Aitec International Patent Office