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1. 发明专利

JP2003181968A THIN SHEET-LAMINATED CORE AND METHOD OF MANUFACTURING THE SAME 审中-公开
公开(公告)号：JP2003181968A
公开(公告)日：2003-07-03
申请号：JP2001390586
申请日：2001-12-21
申请人： TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： HIRAMA NAOMICHI , NAGASAKI KIYOSHI , TAKADO TEIJI
IPC分类号： B32B7/02 , H01F27/245 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a thin sheet-laminated core, which can be easily manufactured and assembled and has improved magnetic properties, and a method of manufacturing the same. SOLUTION: This thin sheet-laminated core includes a plurality of punched magnetic thin strip layers which have been stacked on top of each other or one another and integrally fixed to each other or one another by caulking parts. The caulking parts are in a semi-caulking state. The gap between the layers is not less than 0.01 mm and not more than 0.2 mm, and the proportion of the total gap size of all the layers in the apparent height of the thin sheet- laminated core is not less than 1% and not more than 25%. Further, an outer covering of a resin coating is provided for electrical insulation purposes. COPYRIGHT: (C)2003,JPO

2. 发明专利

JPH11186044A MODEM TRANSFORMER 失效
公开(公告)号：JPH11186044A
公开(公告)日：1999-07-09
申请号：JP35753897
申请日：1997-12-25
申请人： TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： HIRAMA NAOMICHI , KAWAKITA KATSUHIKO
IPC分类号： H01F1/147 , H01F1/18 , H01F17/04
摘要： PROBLEM TO BE SOLVED: To provide a modem transformer which is capable of being made thin, and small in size, exhibit high performance for attaining modem miniaturization and a large capacity for transmission capacity and the like, and can suppress the deterioration of a distortion factor to enable low-distortion transmission of a signal. SOLUTION: This modem transformer includes a bobbin 1, around which coils 2 and 3 are provided beforehand and a magnetic core 5 of magnetic core pieces 4 such as permalloy soft magnetic alloy thin plates built in the bobbin 1. Each magnetic core piece 4 has a metal oxide layer formed thereon, e.g. having a metal oxide with a thermal expansion coefficient of 2-9×10 /K.

3. 发明专利

JPH11186020A ZERO-PHASE CURRENT TRANSFORMER 失效
公开(公告)号：JPH11186020A
公开(公告)日：1999-07-09
申请号：JP34841097
申请日：1997-12-18
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： HIRAMA NAOMICHI , MORIYA YASUAKI
IPC分类号： H01F1/153 , H01F38/28
摘要： PROBLEM TO BE SOLVED: To provide a zero-phase current transformer which is superior in its excessive leakage current characteristic at high output. SOLUTION: A zero-phase current transformer ZCT has a structure, wherein a winding is wound around a core of a wound magnetic alloy thin band or of laminated layers. When the magnetic core is made up of a magnetic alloy thin band get with a D.C. squareness of 0.1-20%, a resultant zero-phase current transformer can exhibit superior excessive leakage current characteristic at high output. As the magnetic alloy a structure having permalloy, amorphous meal and crystallite is used.

4. 发明专利

JPH11176643A TRANSFORMER 失效
公开(公告)号：JPH11176643A
公开(公告)日：1999-07-02
申请号：JP34538997
申请日：1997-12-15
申请人： TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： HIRAMA NAOMICHI , NAGASAKI KIYOSHI
IPC分类号： H01F17/04
摘要： PROBLEM TO BE SOLVED: To reduce distortion of a transmitting waveform when a transformer is used for a MODEM used in data transmission, by forming a magnetic core by using magnetic material whose ratio of residual magnetic flux density to a saturation magnetic flux density is at most a specified value. SOLUTION: A magnetic metal thin plate 4 on which an insulating film is formed is punched out by press working, and the plane shape is made a specified shape such as an E-shape. After weld preventing treatment is performed by sticking magnesia (MgO) powder, alumina (Al2 O3 ) powder and zirconia (ZrO3 ) powder on the surface of the magnetic metal thin plate 4 formed in the above process, thermal treatment is performed at a temperature of 950-1100 deg.C for a specified time. After the thermal treatment is completed, cooling is performed at a cooling speed in the range of 50 to 500 deg.C/Hr. The thermal treatment condition is adjusted, and a magnetic core is so constituted that a ratio of a residual magnetic flux density to a saturation magnetic flux density is set to be equal to or lower than 0.6. A plurality of the magnetic metal thin plates 4 which are adjusted in the above processes are alternately built in a hollow part of a bobbin 3 around which a coil 2 is wound.

5. 发明专利

JP2001284116A MAGNETIC THIN PLATE, LAMINATED CORE AND MANUFACTURING METHOD FOR BOTH 失效
公开(公告)号：JP2001284116A
公开(公告)日：2001-10-12
申请号：JP2000100961
申请日：2000-04-03
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： HIRAMA NAOMICHI , KANEKO YUICHI , TSUJIMOTO KAZUYA
IPC分类号： H01F1/16 , H01F27/245
摘要： PROBLEM TO BE SOLVED: To provide a magnetic thin plate having superior space factor, when laminating by suppressing fusion bonding, in the case of heat treatment and improving operability. SOLUTION: The magnetic thin plate is obtained, by punching a metal alloy thin plate. The plate has a thickness of 1 mm or smaller and a height of a protrusion formed at an inside of an outer peripheral edge of a main surface of 5 μm or less.

6. 发明专利

JP2001057306A MAGNETIC-ALLOY THIN BAND PUNCHED BY PRESS, LAMINATED CORE, AND MANUFACTURE THEREOF 失效
公开(公告)号：JP2001057306A
公开(公告)日：2001-02-27
申请号：JP23057799
申请日：1999-08-17
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： HIRAMA NAOMICHI
IPC分类号： H01F1/16 , H01F27/245 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of the seizure of laminated magnetic-alloy thin bands when subjecting them to a heat treatment, by making not larger than a specific value the areal occupation factor of carbons existent on the surface of each magnetic- alloy thin band which is measured by an Auger electron spectroscopic method. SOLUTION: In a magnetic-alloy thin band 1 punched by a press, the areal occupation factor of carbons existent on its surface which is measured by an Auger electron spectroscopic method is made not larger than 5% to make preventable its seizure when subjecting it to a heat treatment. An insulation layer is interposed between the respective adjacent magnetic-alloy thin bands 1 when they are laminated to form a laminated core. This insulation layer serves as an interlayer insulator. The thickness of the magnetic-alloy thin band 1 is made preferably not smaller than 10 μm and not larger than 500 μm. Also, an arithmetic mean roughness Ra of its surface is made preferably not smaller than 1 μm and not larger than 12.5 μm, and more preferably not smaller than 0.5 μm and not larger than 5 μm. When the numeral value of Ra falls within this scope, the interlayer seizure of the magnetic-alloy thin bands 1 are prevented, and the volumetric factor when they are laminated can be secured to make securable the characteristic obtained as the laminated core.

7. 发明专利

JPH09228007A HIGH STRENGTH MAGNETOSTRICTION ALLOY, SENSOR CORE AND LOAD SENSOR USING THE SAME 失效
公开(公告)号：JPH09228007A
公开(公告)日：1997-09-02
申请号：JP3491496
申请日：1996-02-22
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： NAGASAKI KIYOSHI , TAKADO TEIJI , HIRAMA NAOMICHI
IPC分类号： G01G3/15 , C22C38/00 , C22C38/52 , G01L1/12 , H01L41/12 , H01L41/20
摘要： PROBLEM TO BE SOLVED: To produce a high strength magnetostriction alloy small in the possibility of generating plastic deformation and to produce a sensor core and a load sensor composed of the same alloy and small in deterioration in measuring accuracy even when an excessive load is applied. SOLUTION: This alloy has a compsn. contg., by weight, 20 to 80% Co, 0 to 4% V, 0.01 to 1% C and at least one kind selected from Al, Si, Ga, Cr, Mo, W, Ti, Nb, Ta, Zr, Mn, Ni and Cu by 0.1 to 20%, and the balance substantial Fe. Moreover, using the high strength magnetostriction alloy as a sensor core material, the sensor core and load sensor are formed.

8. 发明专利

JPH10214405A MAGNETIC CLAD MATERIAL AND MAGNETIC SHIELDING PART USING THE MATERIAL 失效
公开(公告)号：JPH10214405A
公开(公告)日：1998-08-11
申请号：JP1885997
申请日：1997-01-31
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： NAGASAKI KIYOSHI , TAKADO TEIJI , HIRAMA NAOMICHI
IPC分类号： G11B5/11
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic clad material having high magnetic permeability and excellent strain resistance by using a Ni-Mo-Si-Fe alloy material having a specified compsn. as a soft magnetic material. SOLUTION: As for the soft magnetic material, Ni is incorporated by 75 to 85wt.% so as to obtained high magnetic permeability, Si is added by 1 to 4wt.% so as to prevent deterioration in the magnetic characteristics due to strain generated by mechanical stress, and Mo is incorporated by 2 to 8wt.% so as to improve the wear resistance. Moreover, Mn, Mg, Al, etc., are added in total

9. 发明专利

JPH10214404A MAGNETIC CLAD MATERIAL AND MAGNETIC SHIELDING PART USING THE MATERIAL 失效
公开(公告)号：JPH10214404A
公开(公告)日：1998-08-11
申请号：JP1885897
申请日：1997-01-31
申请人： TOSHIBA CORP , TOSHIBA ELECTRONIC ENG
发明人： NAGASAKI KIYOSHI , TAKADO TEIJI , HIRAMA NAOMICHI
IPC分类号： G11B5/11
摘要： PROBLEM TO BE SOLVED: To obtain enough magnetic shielding property with little deterioration in magnetic characteristics after cladding by using a Ni-Cu-Mn-Si-Fe alloy material or Ni-Cu-Mn-Si-Mo-Cr-Fe alloy material having a specified compsn. as a soft magnetic material. SOLUTION: As for the soft magnetic material for the clad material, Ni is incorporated by 55 to 78wt.% so as to obtain high magnetic permeability and Cu is incorporated by 10 to 35wt.% so as to prevent deterioration in the magnetic characteristics when strain generates by the mechanical stress during cladding. Further, Mn which gives high magnetic permeability when combined with Cu is incorporated by 0.1 to 2wt.% so as to improve the hot processing property, and Si is added by 0.1 to 2wt.% to improve the hot processing property. Then, Mo and Cr are added each by 0 to 7wt.% so as to improved the magnetic characteristics and the wear resistance. As for a nonmagnetic material for cladding, a stainless steel is used to improve the wear resistance against a magnetic tape.

10. 发明专利

JP2002170720A TRANSMISSION TRANSFORMER AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002170720A
公开(公告)日：2002-06-14
申请号：JP2000363816
申请日：2000-11-29
申请人： TOSHIBA ELECTRONIC ENG , TOSHIBA CORP
发明人： HIRAMA NAOMICHI , KUSAKA TAKAO
IPC分类号： C22C19/03 , H01F1/147 , H01F19/04 , H01F27/245 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To inhibit the dispersion of characteristics such as an inductance value in a transmission transformer in which a permalloy or the like is applied to a magnetic core (a laminated core). SOLUTION: The transmission transformer 6 has a bobbin 1 on which a winding is wound, and the magnetic core 5 composed of a plurality of magnetic alloy pieces 4 incorporated into the bobbin 1 such as ones 4 consisting of the permalloy. A plurality of the magnetic alloy pieces 4 have deflection X respectively, and laminated by arranging the direction of deflection X. The deflection X of each magnetic alloy piece 4 is set so that the quantities of deflection to the length of one side of the magnetic alloy pieces 4 is kept within a range of 2-20%.

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