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91. 发明专利

JPH04144542A MAGNETIC FIELD GENERATING DEVICE 失效
公开(公告)号：JPH04144542A
公开(公告)日：1992-05-19
申请号：JP26744890
申请日：1990-10-04
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： A61B5/055 , G01R33/383 , H01F7/02
摘要： PURPOSE:To obtain the magnetic field generating device being economical and light in weight by utilizing the advantages of both by using a ferrite magnet for an anisotropic trapezoidal segment magnet having the magnetizing direction being parallel to the direction of a magnetic field of a uniform magnetic field formed in a dipole ring magnet, and using a rare earth magnet for the anisotropic trapezoidal segment magnet having the magnetizing direction which is not parallel. CONSTITUTION:In an anisotropic trapezoidal segment magnets 30(1) to 30(16) for constituting a dipole ring magnet 28, as for the anisotropic trapezoidal segment magnets 30(5) and 30(13) having the magnetizing direction being parallel to a uniform magnetic field 31 formed in the inside of the dipole ring magnet, a ferrite magnet which is low in its magnetic characteristic but low in its cost is used since these magnets are not important for forming the uniform magnetic field 31, comparing with other segment magnets, and as for other segment magnets than the magnets 30(5) and 30(13), a rare earth magnet which is expensive but high in its magnetic characteristic is used in order to make the device light in weight. Dipole ring magnets 40, 42, 44 and 46 are also constituted in the same way as the dipole ring magnet 28.

92. 发明专利

JPH04144540A MAGNETIC FIELD GENERATING DEVICE 失效
公开(公告)号：JPH04144540A
公开(公告)日：1992-05-19
申请号：JP26744690
申请日：1990-10-04
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： A61B5/055 , H01F7/02
摘要： PURPOSE:To make the device economical and light in weight by utilizing the advantages of both by combining a ferrite magnet by which weight of the device increases due to a low magnetic characteristic, and a rare earth magnet by which the device can be made light in weight due to a high magnetic characteristic although it is expensive. CONSTITUTION:The inside of each of an anisotropic trapezoidal segment magnet l or 16 constituting a dipole ring magnet 28 uses a rare earth magnet 32, and the outside uses a ferrite magnet 34. That is, the rare earth magnet is used for the inside of the segment magnet for working effectively in order to make a uniform magnetic field in a magnetic field area 50 in the center part of the device, and as for the outside, the ferrite magnet is used to the extent that weight of the magnet does not increase remarkably. With regard to other dipole ring magnets 40, 42, 44 and 46, as well, the inside and the outside of the anisotropic trapezoidal segment magnet use the rare earth magnet and the ferrite magnet, respectively. Comparing with the case when the trapezoidal segment is constituted of only the ferrite magnet, the device can be made light in weight remarkably.

93. 发明专利

JPH0422336A MAGNETIC FIELD GENERATING DEVICE 失效
公开(公告)号：JPH0422336A
公开(公告)日：1992-01-27
申请号：JP12844490
申请日：1990-05-18
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： G01R33/383 , A61B5/055 , G01R33/38 , H01F7/02
摘要： PURPOSE:To generate uniform magnetic field of good quality in a wide range by furnishing a means to adjust the position of an anisotropic trapezoidal segmental magnet into the direction perpendicular to the axis of a bipolar ring magnet. CONSTITUTION:Three position adjusting means 36, 38, 40 are provided. No.1 means 36 has eight adjusting tools 36, 1 through 36, 8, which are installed on anistropic trapezoidal segmental magnets 30, 1 through 30, 8, respectively. No.2 means 38 has also eight adjusting tools 38, 1 through 38, 8, which are mounted on respective anisotropic trapezoidal segmental magnets. Further, No.3 means 40 has eight adjusting tools 40, 1 through 40, 8, which are mounted on respective anisotropic trapezoidal segmental magnets. The position of each segmental magnet is adjusted into the direction perpendicular to the center axis of a bipolar ring 30, and thereby a uniform magnetic field of good quality is generated over a wide range.

94. 发明专利

JPH02214431A PERMANENT MAGNET ROTARY MACHINE 失效
公开(公告)号：JPH02214431A
公开(公告)日：1990-08-27
申请号：JP3330989
申请日：1989-02-13
申请人： HONDA MOTOR CO LTD , SHINETSU CHEMICAL CO
发明人： KOMURO NOBUAKI , HARUI YOSHITO , MOTODATE SHIYOUJI , MATSUI YUKIHIRO , HIDA TERUAKI , MIYATA KOJI
IPC分类号： H02K1/17 , H02K23/04
摘要： PURPOSE:To stabilize the characteristic of a permanent magnet rotary machine by saturating the flux density of a yoke under normal temperature thereby reducing fluctuation of flux in the magnetic path of the rotary machine against temperature variation from normal temperature to high temperature. CONSTITUTION:Flux density in a yoke is set higher than the saturated flux density under normal temperature. Consequently, leakage flux phi' is reduced at first, even if the motor temperature rises to weaken the magnetic force of permanent magnets 2, 3, thus relieving magnetic saturation of the yoke. Since fluctuation of flux passing through an armature 1 is minimized, a motor can continue rotation stably with no influence of temperature.

95. 发明专利

JP2001145280A PERMANENT MAGNET SYNCHRONOUS MOTOR 失效
公开(公告)号：JP2001145280A
公开(公告)日：2001-05-25
申请号：JP32106199
申请日：1999-11-11
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： H02K1/18 , H02K21/14
摘要： PROBLEM TO BE SOLVED: To reduce disturbance of magnetic flux between stators and permanent magnets to reduce fluctuation of torque during rotating operation, even when the number of permanent magnet groups provided to the rotor yokes of a radial air gap type permanent magnet synchronous motor is set to 2 or 3. SOLUTION: In a radial air gap type permanent magnet synchronous motor wherein a stator has a plurality of magnetic material plates laminated in the axial direction of the rotor, the rotor has at least two sets of permanent magnet groups allocated with the intervals in the axial direction around the rotor yoke provided in the axial direction, these two sets of permanent magnet respectively have a plurality of permanent magnets magnetized in the radius direction of the rotating axis, and these two sets of permanent magnet groups are provided with the predetermined deviation angle on the rotor yoke. The magnetic material plate corresponding to the gap between two permanent magnet groups among a plurality of magnetic material plates is replaced with non-magnetic material plate.

96. 发明专利

JP2000350393A PERMANENT-MAGNET MOTOR 失效
公开(公告)号：JP2000350393A
公开(公告)日：2000-12-15
申请号：JP2000091430
申请日：2000-03-29
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： H02K1/22 , H02K1/27 , H02K21/14
摘要： PROBLEM TO BE SOLVED: To obtain a permanent-magnet motor having a magnet buried type rotor, in which cogging torque is reduced, and a high output and high accuracy are controlled. SOLUTION: In the permanent-magnet motor in which a rotor 3, in which a plurality of permanent magnets 1 are buried into a rotor yoke 2 in the radial direction, and a stator, in which windings are wound on a core with a plurality of slots 6, are arranged through an air gap, the motor has the petal-shaped rotor 3 in which the center of an outside diameter is made eccentric so that the outside diameter passing through the external contour of the permanent magnet 1 is made smaller than that passing through the apex of the contour of the adjacent permanent magnet 1.

97. 发明专利

JP2000184679A VCM MAGNETIC CIRCUIT 失效
公开(公告)号：JP2000184679A
公开(公告)日：2000-06-30
申请号：JP35314198
申请日：1998-12-11
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： G11B21/02 , H02K33/18
摘要： PROBLEM TO BE SOLVED: To reduce the leakage magnetic field of upper and lower parts of a magnetic circuit by installing two permanent magnet thin plates while the plates are brought into contact with an end face, so that the direction of magnetization is different by specified degrees, and at the same time are brought into contact with the outside of each magnetic body yoke with polarity opposite to that of a flat permanent magnet. SOLUTION: A thin-plate permanent magnet 44 (a counter magnet) is provided on the external surface of upper/lower up yokes 41a and 41b in a VCM magnetic circuit. However, in the counter magnet 44, two permanent magnet thin plates are brought into contact each other on an end face, so that the directions of magnetization are different by 180 degrees and are magnetized with polarity opposite to that of a permanent magnet 40 opposing while sandwiching the up yokes 41s and 41b. Also, in the case of magnet one-side arrangement, two permanent magnet thin plates are brought into contact each other on an end face so that the directions of magnetization are different by 180 degrees and are magnetized with polarity opposite to that of a permanent magnet 40. More specifically, the counter magnet 44 is arranged on the upper surface of the upper up yoke 41a and the lower surface of the lower up yoke 41b, thus achieving high flux density and miniaturization, and reducing a leakage magnetic field without increasing costs.

98. 发明专利

JPH11329788A MAGNETIC FIELD GENERATING DEVICE FOR MAGNETRON PLASMA 失效
公开(公告)号：JPH11329788A
公开(公告)日：1999-11-30
申请号：JP14067898
申请日：1998-05-22
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： H05H1/46 , C23C14/35 , C23F4/00 , H01F7/02 , H01J37/34
摘要： PROBLEM TO BE SOLVED: To provide a horizontal magnetic field sufficiently uniform on a plane lower than the central cross section in the longitudinal direction of a dipole ring magnet by arranging a magnetic substance ring on the top surface or in its vicinity of the dipole ring magnet in which a plurality of pillar-shaped anisotropic segment magnets are arranged in a ring-shape. SOLUTION: An anisotropic segment magnet 80 is constituted with a magnetic substance ring 90 arranged in the vicinity of the top surface or in contact with the top surface of a dipole ring magnet 81 embedded in a non-magnetic stand 82. The dipole ring magnet 81 used in a magnetic field generating device is formed by using 16 anisotropic segment magnets 80 made of square pillar-shaped Nd-Fe-B based magnet having a length RL of 110 mm, for example, and arranging the ring-shaped iron magnetic substance ring 90 on the top surface of the dipole ring magnet 81 for operation. The surface capable of obtaining a horizontal magnetic field becomes 5 mm lower than the central cross section of the dipole ring magnet 81 compared with the case where the magnetic substance ring 90 is not arranged on the top surface of the dipole ring magnet 81.

99. 发明专利

JPH11104109A MAGNETIC FIELD GENERATOR 失效
公开(公告)号：JPH11104109A
公开(公告)日：1999-04-20
申请号：JP27402997
申请日：1997-10-07
申请人： SHINETSU CHEMICAL CO
发明人： MIYATA KOJI
IPC分类号： G01R33/383 , A61B5/055 , G01R33/385
摘要： PROBLEM TO BE SOLVED: To inhibit senses of pressure and fear, by making the width of the column part of a C-shape connected iron frame smaller than the radius of a magnetic pole piece in a magnetic field generator comprising a pair of disk permanent magnets magnetized in the thickness direction and placed facing each other on the inside face of the C-shaped iron frame and a magnetic pole pieces equipped on the permanent magnets. SOLUTION: A pair of disk magnets 10 magnetized in the thickness direction are placed faced on the inside face of a C-shape connected iron frame to form a closed circuit and magnetic pole pieces 14 with ring protrusions 15 for generating a uniform magnetic field in a wider range are placed on facing planes of magnets 10 to constitute this magnetic field generator. In that case, the width W of the column part of the connected iron frame 12 is made smaller than the radius R (=D/2) of the magnetic pole piece 14. That is, the thickness T of the column part of the connected iron frame to sufficiently pass magnetic flux of the magnet is taken as large as possible keeping the minimum cross section area S of the column required for passing the magnetic flux, and the width W is made smaller corresponding to that extent to inhibit senses of pressure and fear given to a patient. The access angle θ is made larger than that of conventional one.

100. 发明专利

JPH0935979A MANUFACTURE OF ANISOTROPIC SINTERED PERMANENT MAGNET 失效
公开(公告)号：JPH0935979A
公开(公告)日：1997-02-07
申请号：JP20681395
申请日：1995-07-21
申请人： SHINETSU CHEMICAL CO
发明人： MINOWA TAKEHISA , MIYATA KOJI , TAKAGUCHI KAZUHIRO
IPC分类号： B22F3/02 , H01F1/055 , H01F1/057 , H01F41/02 , B22F3/087
摘要： PROBLEM TO BE SOLVED: To provide a manufacturing method of an anisotropic sintered magnet for improving residual magnetic flux density. SOLUTION: In a molding process of anisotropic sintered magnet manufacturing, at least a tip part of an upper punch and a lower punch is formed of a metallic material having saturation magnetization 4πIs of 500 to 12000G and residual magnetization 4πIr of 6000G or less, permanent magnet powder is supplied into a cavity of a molding comprised of a die, an upper punch and a lower punch, magnetic field for orienting an easy magnetization direction of permanent magnet powder is applied, compression is carried out for molding and an anisotropic sintered magnet is manufactured. Especially, this method is a manufacturing method of an anisotropic sintered magnet wherein permanent magnet powder is R-Fe-B or R-Co rare earth permanent magnet powder.

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