Title:
CURRENT SENSOR AND WATT-HOUR METER
Document Type and Number:
Japanese Patent JP2019109195
Kind Code:
A
Abstract:
To provide a current sensor and a watt-hour meter that can be manufactured easily, are less affected by an external magnetic field, and have improved linearly in current detection characteristics in a wide range.SOLUTION: In a current sensor 2 for detecting a current signal flowing through a current bar 1 by measuring a magnetic field formed around the current bar 1 for allowing current to flow, a pair of boards 2a, 2c and a pair of board 2b, 2d in which an identical coil pattern is formed are disposed symmetrically to an axis C of the current bar 1. The coil pattern is connected in series by a connection wire 31 so as to add an induced voltage generated in the coil pattern, and a return wire 32 returning along the connection line 31. Each of the boards 2a to 2d is a multilayer board in which a plurality of coil patterns are laminated and disposed.SELECTED DRAWING: Figure 2
Inventors:
YAMAUCHI YOSHINORI
KURIHARA SUSUMU
KURIHARA SUSUMU
Application Number:
JP2017243839A
Publication Date:
July 04, 2019
Filing Date:
December 20, 2017
Export Citation:
Assignee:
FUJI ELECTRIC METER CO LTD
International Classes:
G01R15/18; G01R11/00
Domestic Patent References:
| JP2009210406A | 2009-09-17 | |||
| JP2010048755A | 2010-03-04 | |||
| JPS4815097Y1 | 1973-04-25 | |||
| JPS5962557U | 1984-04-24 | |||
| JP2000266784A | 2000-09-29 | |||
| JP2002040057A | 2002-02-06 | |||
| JP2003315373A | 2003-11-06 | |||
| JP2011220952A | 2011-11-04 |
Foreign References:
| US20040257061A1 | 2004-12-23 | |||
| US20110025304A1 | 2011-02-03 |
Attorney, Agent or Firm:
Sakai International Patent Office