Title:
MAGNETIC CORE AND CURRENT SENSOR USING THE MAGNETIC CORE
Document Type and Number:
Japanese Patent JP2001052933
Kind Code:
A
Abstract:
To obtain a magnetic core, having appropriately high initial permeability and high permeability to a strong magnetic field induced by a large current.
By a method, such as a heat treatment in a magnetic field using a magnetic field applied perpendicular to a magnetic path, an initial permeability μi is set to 50,000-100,000 and a permeability μ4A under a bias magnetic field of 4 A/m applied along the magnetic path is set to 0.4-0.6 times the initial permeability μi. As a result, a magnetic core can be obtained, which has appropriately high initial permeability and high permeability to a strong magnetic field induced by large current.
Inventors:
MORIYA YASUAKI
Application Number:
JP22862399A
Publication Date:
February 23, 2001
Filing Date:
August 12, 1999
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
H01F1/153; H01F27/24; H01F38/28; (IPC1-7): H01F27/24; H01F1/153; H01F38/28
Attorney, Agent or Firm:
Suyama Saichi