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61. 发明专利

JPH11215615A SUPERCONDUCTING MAGNETICALLY LEVITATED RUNNING CAR 失效
公开(公告)号：JPH11215615A
公开(公告)日：1999-08-06
申请号：JP1259598
申请日：1998-01-26
申请人： HITACHI LTD , TOKAI RYOKAKU TETSUDO KK
发明人： FURUKAWA YOKO , FUKUMOTO EIJI , KOMURA AKIYOSHI , WATANABE HIROYUKI , TERAI MOTOAKI , INETAMA SATORU
IPC分类号： B61B13/08 , B60L13/10 , H01F6/06
摘要： PROBLEM TO BE SOLVED: To provide a superconducting magnetically levitated running car which produces balanced right and left driving forces, and runs stably keeping a necessary levitating force, even when a superconducting coil is quenched. SOLUTION: A compensating superconducting coil 10 composed of a short- circuited superconducting coil is provided facing a levitating/driving superconducting coil 1, a magnetic field lost by the quenching of the levitating/ driving superconducting coil 1 is compensated, by a permanent current induced in the compensating superconducting coil 10, and a levitating force is kept, when the levitating/driving superconducting coil 1 is quenched. Consequently, it becomes possible to perform stable running balancing right and left driving forces, since a necessary levitating force is kept, even when superconducting magnets are quenched while the car is running.

62. 发明专利

JPH11187503A GROUND COIL FOR MAGNETIC LEVITATION TYPE RAILROAD 失效
公开(公告)号：JPH11187503A
公开(公告)日：1999-07-09
申请号：JP35517097
申请日：1997-12-24
申请人： HITACHI LTD
发明人： KOMURA AKIYOSHI , FURUKAWA YOKO , HATTORI KENICHI , TSUJIMOTO SHIZUO
IPC分类号： B60L13/10
摘要： PROBLEM TO BE SOLVED: To reduce eddy current loss generated at an 8-shaped floating coil, by shifting the floating coil and a single-layer propellant coil in the traveling direction for disposition. SOLUTION: An 8-shaped floating coil 1 and a single-layer propellant coil 2 are arranged in parallel along the traveling direction of a vehicle. A perpendicular side 3 of the 8-shaped floating coil 1 and a perpendicular side 4 of the single-layer propellant coil 2 are shifted in the propulsion direction for disposition. Therefore, a magnetic field generated at the single-layer propellant coil 2 can reduce eddy current loss generated at the 8-shaped floating coil 1. In the case of a crossed square-shaped floating coil 5 consisting of two 8-shaped floating coils, the central position 6 in the traveling direction of the crossed square-shaped floating coil 5 in the traveling direction and the central position 7 in the traveling direction of the single-layer propellant coil 2 whose coil pitch is equal to that of the crossed square-shaped floating coil 5 are shifted in the traveling direction for disposing. The perpendicular side of the crossed square-shaped floating coil 5 and the perpendicular side of the single-layer propellant coil 2 are not overlapped, thus it is possible to reduce eddy current generated at the crossed square-shaped floating coil 5 by the magnetic field the single-layer propellant coil 2 generates.

63. 发明专利

JPH09280922A CARBON-FILM-TYPE LIQUID LEVEL GAGE 失效
公开(公告)号：JPH09280922A
公开(公告)日：1997-10-31
申请号：JP9645196
申请日：1996-04-18
申请人： HITACHI LTD
发明人： YAMAMOTO HIROE , OKADA TEIGO , TOMEOKU HIROSHI , KOMURA AKIYOSHI
IPC分类号： G01F23/24
摘要： PROBLEM TO BE SOLVED: To obtain a highly reliable apparatus which is inexpensive, strong in mechanical strength and easy to manufacture and handle by coating a surface of a non-magnetic metal cylinder with organic insulating solvent and by applying carbon paste material to the surface. SOLUTION: An upper part and a lower part of a cylindrical matrix 1 made of non-magnetic metal with a threaded part 19 cut are coated by organic insulating solvent 2, and carbon paste 3 is applied to their surfaces to constitute a carbon film sensor 4. An upper insulation fixing base 6 and a lower insulation fixing base 7 are fixed by fixing nuts 10, 11 via spring washers 8, 9, blind nuts 20, 21 are set at their tips, and they are fixed to an insulation pipe 5 after voltage current leads 14 to 17 are attached. Thus such an apparatus can be obtained at a low cost wherein it is extremely easy to manufacture and easy to handle, a sensor part is not linear but hollow, it is free from breakage or partial peeling at the time of assembling since the sensor is applied like a thin film and baked, it is resistant against impact, easy to handle, and durable with good mechanical strength.

64. 发明专利

JPH08273924A SUPERCONDUCTING MAGNET 失效
公开(公告)号：JPH08273924A
公开(公告)日：1996-10-18
申请号：JP7502595
申请日：1995-03-31
申请人： HITACHI LTD
发明人： YAMAMOTO HIROE , OKADA TEIGO , KOMURA AKIYOSHI
IPC分类号： H01F6/02
摘要： PURPOSE: To obtain a superconducting magnet of which quenching can be prevented by a method wherein a carbon sheet material is wound so as to be interposed and a temperature change which is generated in a superconducting wire before quenching and in a resin material near it is detected. CONSTITUTION: A slit 8 which makes an end plate 2a on one side communicate with a winding shaft 1 up to an end plate 2b on the other side is cut in the winding shaft 1 and the end plates 2a, 2b which form a winding recessed part 4 in a nonmagnetic bobbin 3, and a recessed part 9 and a protruding part 10 are formed. The face of the winding recessed part 4 in the winding shaft 1 and the end plates 2a, 2b in which the recessed part 9 and the protrusion part 10 have been formed is covered with an insulating layer 11. Then, a carbon sheet 12 as a temperature detection element used to detect the temperature change of a superconducting wire 5 on the face of the protruding part 10 is bonded to a carbon covered winding recessed part 13, the superconducting wire 5 is wound on the carbon covered winding recessed part 13, and a superconducting coil 6 is formed. Thereby, a temperature change in the neighborhood by the very small movement of the superconducting wire 5 due to a crack in an impregnated material or due to an electromagnetic force can be detected, and it is possible to predict the quenching of a superconducting magnet at an early stage and whose stability can be maintained.

65. 发明专利

JPH08222426A COIL STRUCTURE OF SUPERCONDUCTING MAGNET 失效
公开(公告)号：JPH08222426A
公开(公告)日：1996-08-30
申请号：JP2643895
申请日：1995-02-15
申请人： HITACHI LTD
发明人： YAMAMOTO HIROE , OKADA TEIGO , KOMURA AKIYOSHI
IPC分类号： G01K7/18 , H01F6/00 , H01F6/02
摘要： PURPOSE: To detect the temperature conditions of a superconducting material and the impregnant in the vicinity of the pole prior to the quenching by coiling dummy wire provided with a detecting means, which detects the temperature change generated on the surface of the insulator of superconducting wire and in the vicinity of the pole, and the superconducting wire. CONSTITUTION: A U-shaped insulating coil recessed part 7 is formed of dividing insulator 4 and insulator edge plates 6a and 6b. In the recessed part 7, a superconducting coil 17 is formed by coiling carbon-coated dummy wire 16, which is coated with carbon paste, on wire material formed of insulating superconducting wire 15 and nonmagnetic metal or insulator. A detecting means, which uses the carbon-coated dummy wire 16, is coated with the carbon paste, which is formed by mixing thermosetting phenol resin with carbon powder as binder, or the carbon paste which is formed by mixing formal or polyester or polyimide organic insulating solvent with carbon powder. Thus, short-circuit between the superconducting wire and the carbon film which forms the temperature detecting element and disconnection due to coiling tensile force are eliminated.

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