Title:
CURRENT SENSOR
Document Type and Number:
WIPO Patent Application WO/2013/161496
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a current sensor, which is less affected due to noise, and which is capable of performing highly accurate current value measurement. This current sensor is characterized in being provided with: a magnetic material core (11), which is disposed at a position surrounding a current path (CB) having flowing therein a current to be measured, and which is provided with a first gap and a second gap; a first magnetoelectric conversion element (13A), which is provided in the first gap of the magnetic material core; a second magnetoelectric conversion element (13B), which is provided in the second gap of the magnetic material core; and a calculating apparatus, which calculates a difference between output of the first magnetoelectric conversion element and that of the second magnetoelectric conversion element. The current sensor is also characterized in that: an angle formed by the direction of a first magnetic field of an inductive magnetic field applied to the first magnetoelectric conversion element, and the first magnetic sensing direction detected by means of the first magnetoelectric conversion element, and an angle formed by the direction of a second magnetic field of an inductive magnetic field applied to the second magnetoelectric conversion element, and the second magnetic sensing direction detected by means of the second magnetoelectric conversion element are different from each other; and total electrostatic capacitance between the current path and the first magnetoelectric conversion element, and total electrostatic capacitance between the current path and the second magnetoelectric conversion element are equal to each other.
Inventors:
HEBIGUCHI HIROYUKI (JP)
Application Number:
PCT/JP2013/059094
Publication Date:
October 31, 2013
Filing Date:
March 27, 2013
Export Citation:
Assignee:
ALPS GREEN DEVICES CO LTD (JP)
International Classes:
G01R15/20
Foreign References:
| JP2011158337A | 2011-08-18 | |||
| JP2012047564A | 2012-03-08 | |||
| JPS4871681A | 1973-09-27 | |||
| JP2003315376A | 2003-11-06 | |||
| JPS57128854A | 1982-08-10 | |||
| JPH04250365A | 1992-09-07 |
Attorney, Agent or Firm:
AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)
Hiroyoshi Aoki (JP)
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