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Title:
MAGNETIC FORCE ADJUSTMENT METHOD AND DEVICE OF FERRITE/MAGNET ELEMENT
Document Type and Number:
Japanese Patent JP2011077779
Kind Code:
A
Abstract:

To provide a magnetic force adjustment method and device of ferrite/magnet elements, which avoids the size increase of the device and the increase of power consumption.

The magnetic force adjustment method and device of ferrite/magnet elements has an ferrite which has a plurality of center electrodes that are electrically insulated each other and crossly arranged, and permanent magnets which apply a DC magnetic field to the ferrite. The ferrite/magnet element passes through between the facing permanent magnets 63 of a magnetizing magnetic circuit member 61, so that the permanent magnet of the ferrite/magnet element is magnetically saturated. Then, the magnetically saturated ferrite/magnet element passes through a magnetic flux density distribution that is formed between the facing permanent magnets 67 of a demagnetizing magnetic circuit member 65 and simply changes, so that the permanent magnet of the ferrite/magnet element is demagnetized.


Inventors:
TSUNODA HISAYA
ASAI TAKAMASA
Application Number:
JP2009226429A
Publication Date:
April 14, 2011
Filing Date:
September 30, 2009
Export Citation:
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Assignee:
MURATA MANUFACTURING CO
International Classes:
H01P1/36; H01F13/00; H01P11/00
Domestic Patent References:
JP2002330003A2002-11-15
JP2005223199A2005-08-18
JPS647485B21989-02-09
JP2006033055A2006-02-02
JPS63239805A1988-10-05
JPH03263902A1991-11-25
JP2005117500A2005-04-28
JPH03190110A1991-08-20
Attorney, Agent or Firm:
Takeichi Morishita
Tani Kazuhiro