JPS5726415A - Demagnetizing method - Google Patents

Demagnetizing method

Info

Publication number
JPS5726415A
JPS5726415A JP10090080A JP10090080A JPS5726415A JP S5726415 A JPS5726415 A JP S5726415A JP 10090080 A JP10090080 A JP 10090080A JP 10090080 A JP10090080 A JP 10090080A JP S5726415 A JPS5726415 A JP S5726415A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic unit
coercive force
magnetic field
demagnetized
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP10090080A
Other languages
Japanese (ja)
Other versions
JPS5814057B2 (en
Inventor
Hideo Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP10090080A priority Critical patent/JPS5814057B2/en
Publication of JPS5726415A publication Critical patent/JPS5726415A/en
Publication of JPS5814057B2 publication Critical patent/JPS5814057B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F13/00—Apparatus or processes for magnetising or demagnetising
    • H01F13/006—Methods and devices for demagnetising of magnetic bodies, e.g. workpieces, sheet material

Abstract

PURPOSE:To demagnetize a magnetic unit having large coercive force in a short time by rotating the magnetic unit to be demagnetized in a DC magnetic field and reducing the intensity of the DC magnetic field via the value larger than the coercive force of the magnetic unit toward zero, thereby eliminating the influence of its inductance. CONSTITUTION:A core 1 is composed of a yoke 1a and magnetic poles 1b, 1c, which are opposed via an air gap 4 in the yoke 1a, and coils 2 are wound thereon. A magnetic unit 3 to be demagnetized is rotatably disposed in the air gap 4, is rotated in the direction of the arrow, a direct current I is flowed through the coil 2, is so controlled that the current I reaches the maximum value Im for generating the magnetic field larger than the coercive force of the magnetic unit 3, and is gradually reduced thereafter toward zero. Then, magnetic field +H and -H of similar current waveform to the current I between the gap 4, thereby eliminating the influence of its inductance, and the magnetic unit having large coercive force can be demagnetized in a short time.
JP10090080A 1980-07-23 1980-07-23 Demagnetization method Expired JPS5814057B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10090080A JPS5814057B2 (en) 1980-07-23 1980-07-23 Demagnetization method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10090080A JPS5814057B2 (en) 1980-07-23 1980-07-23 Demagnetization method

Publications (2)

Publication Number Publication Date
JPS5726415A true JPS5726415A (en) 1982-02-12
JPS5814057B2 JPS5814057B2 (en) 1983-03-17

Family

ID=14286210

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10090080A Expired JPS5814057B2 (en) 1980-07-23 1980-07-23 Demagnetization method

Country Status (1)

Country Link
JP (1) JPS5814057B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006086316A (en) * 2004-09-16 2006-03-30 Yokohama Rubber Co Ltd:The Demagnetization method and apparatus thereof
JP2006261226A (en) * 2005-03-15 2006-09-28 Kanetec Co Ltd Demagnetizer and demagnetizing device
JP2007281242A (en) * 2006-04-07 2007-10-25 National Institute For Materials Science Demagnetizing method and demagnetizer performing the same
JP2008258502A (en) * 2007-04-06 2008-10-23 Nippon Denji Sokki Kk Demagnetization apparatus and demagnetization method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006086316A (en) * 2004-09-16 2006-03-30 Yokohama Rubber Co Ltd:The Demagnetization method and apparatus thereof
JP2006261226A (en) * 2005-03-15 2006-09-28 Kanetec Co Ltd Demagnetizer and demagnetizing device
JP2007281242A (en) * 2006-04-07 2007-10-25 National Institute For Materials Science Demagnetizing method and demagnetizer performing the same
JP2008258502A (en) * 2007-04-06 2008-10-23 Nippon Denji Sokki Kk Demagnetization apparatus and demagnetization method

Also Published As

Publication number Publication date
JPS5814057B2 (en) 1983-03-17

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