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1. 发明专利

JP2005130541A Inverter apparatus 有权
标题翻译：逆变器装置
公开(公告)号：JP2005130541A
公开(公告)日：2005-05-19
申请号：JP2003360276
申请日：2003-10-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OHATA KOJI , HIGASHIMURA YUTAKA , FUKUSHI YOSHISHIGE , TAKEUCHI RYOZO
IPC分类号： H02H3/16 , H02H7/122 , H02M7/12 , H02M7/48 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide a transformerless inverter 3 capable of suppressing fluctuation in a ground voltage to prevent mulfunction of a system protection device 2. SOLUTION: An intermediate connection point 10 of a filter capacitor 8 of a DC intermediate circuit of a transformerless inverter 3, which does not contain a transformer, is grounded between a converter 7 and a zero-phase current transformer 5. The zero-phase current that flows an earth line 11 is detected with a current transformer 12 that penetrates the earth line 11 (1), or a differential current that flows the positive/negative connection line of the DC intermediate circuit is detected with a current transformer 15 or a reactor 17 (2). The output is made to penetrate the zero-phase current transformer 5, in the direction opposite to that of a system 1, through a band pass filter 13 whose impedance is low to a third harmonics 3f 0 frequency of the voltage of the three-phase AC system 1. The transformerless inverter detects a zero-phase current that flows due to grounding, which is offset with the signal detected by the zero-phase current transformer 5, to prevent mulfunction of the system protection device 2 for suppressing fluctuation in a ground voltage. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决方案：提供能够抑制接地电压波动的无变压器逆变器3，以防止系统保护装置2的结合。解决方案：DC的滤波电容器8的中间连接点10 不包含变压器的无变压器逆变器3的中间电路在转换器7和零相电流互感器5之间接地。流过接地线11的零相电流用渗透的电流互感器12检测用电流互感器15或电抗器17（2）检测接地线11（1）或流过直流中间电路的正/负连接线的差动电流。输出通过带阻滤波器13穿过零相电流互感器5，该带通滤波器13的阻抗低于第三谐波3f 0 频率的带通滤波器13，与系统1相反的方向三相交流系统的电压1.无变压器逆变器检测由于接地而流过的零相电流，其由零相电流互感器5检测到的信号偏移，以防止系统保护装置 2，用于抑制接地电压的波动。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JPH11196501A PROPULSIVE COIL DEVICE FOR MAGNETIC LEVITATED RAILWAY 失效
公开(公告)号：JPH11196501A
公开(公告)日：1999-07-21
申请号：JP35939397
申请日：1997-12-26
申请人： HITACHI LTD , TOKAI RYOKAKU TETSUDO KK
发明人： FUKUSHI YOSHISHIGE , UMEKI TAKESHI
IPC分类号： B65G54/02 , B60L13/03
摘要： PROBLEM TO BE SOLVED: To provide a small-sized propulsive coil device for a magnetic leviated railway, in which insulation degradation of each of propulsive coils can be detected. SOLUTION: Cable conductors 5 are connected at both ends of a propulsive coil 1 through terminal leads 4, cable external conductor layers 7 are divided into sections such as 7a and 7b in the connections, and both sections 7a and 7b are joined by leads 8a, 8b. Both leads are passed through cores 9, and signal detecting coils 10 are wound on the cores. A current generated by partial discharge is flowed through conductive layers 3, the leads 8, and detected by signal detecting coils 10.

3. 发明专利

JPH10172833A MOLD TRANSFORMER 失效
公开(公告)号：JPH10172833A
公开(公告)日：1998-06-26
申请号：JP32849796
申请日：1996-12-09
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIO , FUKUSHI YOSHISHIGE , TAKEUCHI RYOZO , IZUNA TOMOKI
IPC分类号： H01F27/32 , H01F27/00
摘要： PROBLEM TO BE SOLVED: To safely measure partial discharge generating inside a mold transformer. SOLUTION: This transformer is provided with a high voltage coil 10, a low voltage coil 12 and an iron core, and a low voltage winding 66 of the coil 12 is embedded in a resin 18, and then a coupled capacitor 40 and a detection impedance element 42 are embedded together with a high voltage winding 20 in a thickness part 38 of a resin 16 of the coil 10. Further, both ends of the element 42 are connected with terminals 46 and 48 on the surface of the resin 16, and one end of the capacitor 40 is connected with a terminal 22. When partial discharge is subject to measurement, a partial discharge measuring device is connected with the terminals 46 and 48 through a coaxial wire.

4. 发明专利

JPH0260107A GROUND COIL FOR MAGNETIC LEVIATION TRAIN 失效
公开(公告)号：JPH0260107A
公开(公告)日：1990-02-28
申请号：JP21072988
申请日：1988-08-26
申请人： HITACHI LTD
发明人： FUKUSHI YOSHISHIGE , TAKEUCHI RYOZO , HIGASHIMURA YUTAKA , KOIDE TOMOMICHI , KANO YASUSHI , FUJIOKA SHINEI , TAKAMURA MAKOTO
IPC分类号： B61B13/08 , H01F7/20
摘要： PURPOSE:To obtain a ground coil, having an excellent mass-productivity and a high durability, equipped with an external shielding layer by a method wherein, after a conductivity coating material has been coated on the internal surface of a molding die, molding resin is injected into the molding die, and at the same time, the coated material is dried up. CONSTITUTION:A propulsive guide coil 1 is composed of a molded insulating layer 5 and an external shield 6, both of which are provided around a coil winding 4. The winding 4 is constituted by winding a plurality of turns of a conductor 10 after a strand insulation 11 has been provided on the conductor 10. After a moldreleasing treatment has been performed on the internal surface of molding dies 14 and 15, a conductivity coating material 17 is coated uniformly thereon. Said coating material 17 is hardened, and the shield 6 is formed. A conductor 4 is set inside the dies 14 and 15, on which a mold-releasing treatment is conducted as above-mentioned through the intermediary of spacers 13 which are used to secure the thickness of insulation. Subsequently, molding resin is injected into the dies 14 and 15 through an injection inlet 16, and the resin is hardened at the prescribed temperature. The obtained coil 1 is buried in and fixed to a concrete panel 3, and a large number of the coil 1 are provided on both sides of the travelling track.

5. 发明专利

JPH01293509A MOLDED COIL 失效
公开(公告)号：JPH01293509A
公开(公告)日：1989-11-27
申请号：JP12413888
申请日：1988-05-21
申请人： HITACHI LTD
发明人： FUKUSHI YOSHISHIGE , FUJIOKA SHINEI , KANO YASUSHI
IPC分类号： H01F27/32 , H01F5/06 , H02K15/12
摘要： PURPOSE:To obtain a molded coil having high reliability and excellent mass- productivity by employing insulating hollow fillers having independent spaces in them as fillers. CONSTITUTION:The coil conductors 1 of a molded coil 4 are provided in a die so as to be floated by predetermining insulating spacers and the circumference of the coil conductors 1 is molded with resin 2 with fillers. Insulating hollow fillers 3 having independent spaces in them are employed as the fillers. Glass balloons, volcanic ash balloons, alumina balloons and so forth may be employed as the hollow fillers and the particle diameter less than 0.1mm is recommended. For instance, the hollow fillers 3 and short fibers 13 as reinforcing material are mixed with thermosetting resin 12 such as epoxy resin to produce the resin 2 with fillers. Glass fibers, aramid fibers, oriented polyethylene fibers and so forth may be employed as the short fibers 13. The floating of the hollow fillers 3 can be suppressed by adding a suitable quantity of the short fibers 13.

6. 发明专利

JPS63310498A SUPERCONDUCTING LIFT 失效
公开(公告)号：JPS63310498A
公开(公告)日：1988-12-19
申请号：JP14510187
申请日：1987-06-12
申请人： HITACHI LTD
发明人： FUKUSHI YOSHISHIGE , NAGAI MATAO , MIYAO HIROSHI , SATO TAKANORI , TSUTSUMI YASUYUKI
IPC分类号： B66B9/02 , B66B9/00 , B66F3/00 , H01F6/00 , H01L39/00 , H02N15/04
摘要： PURPOSE:To simplify the structure by combining a cylinder made of superconducting material and annular superconducting floats where magnets for producing magnetic field are arranged around the superconducting cylinder. CONSTITUTION:When a cylinder 2 made of superconducting material is erected vertically and coolant 6 having temperature lower than the critical temperature of superconducting material is fed through a coolant inlet/outlet 4 at the lower end, the portion of the superconducting cylinder 2 contacting with the coolant 6 is brought into superconducting condition. When power is fed to a magnet 1 under this condition and flux is produced, flux is confined in the cylinder 2 and rises to non-superconducting portion of the cylinder 2(portion not contacting with the coolant 6) and spreads to the outside of the cylinder 2. When an annular superconductor(containing coolant 6 at the inside) is fitted over the cylinder 2 and moved downward, floating force is produced through repulsion against the flux at the portion where the flux spreads to the outside of the cylinder, and the annular superconductor 5 stops in place. Then the coolant 6 id taken in/out of the cylinder 2 so as to vary the level of coolant 6 thus varying the floating height of the superconductor 5.

7. 发明专利

JPS6266608A SUPERCONDUCTING COIL 失效
公开(公告)号：JPS6266608A
公开(公告)日：1987-03-26
申请号：JP20737585
申请日：1985-09-19
申请人： HITACHI LTD
发明人： NAGAI MATAO , FUKUSHI YOSHISHIGE , KAMIYA HIROYUKI , ASANO KATSUHIKO , YAMAGIWA TAKESHI
IPC分类号： H01F6/04 , H01F6/06
摘要： PURPOSE:To prevent the surface of a superconducting conductor from being coated with resin by providing protrusion preventing means on an interlayer insulating layer, and forming a projection to be engaged with part in a recess of a disk of a unit coil to block the recess of the conductor. CONSTITUTION:A projection 10 to be engaged with part of a recess 9 of a superconducting conductor 1a is formed on an interlayer insulating layer 2a of a superconducting coil 1A. The projection 10 of the layer 2a is wound on the part of the recess 9 of the conductor 1a to form a disk 3 of a unit coil. Protrusion preventing means is formed on the layer 2a, the projection 10 to be engaged with the part of the recess 9 of the conductor 1a is formed, the recess 9 of the conductor 1a is blocked, the surface is coated with resin to prevent the surface from being coated with the resin to prevent cooling effect.

8. 发明专利

JPS61210603A CRYOSTAT 失效
公开(公告)号：JPS61210603A
公开(公告)日：1986-09-18
申请号：JP5048785
申请日：1985-03-15
申请人： HITACHI LTD
发明人： FUKUSHI YOSHISHIGE , NAGAI MATAO
IPC分类号： F25D3/10 , F04B37/08 , F17C3/08 , H01F6/00 , H01F6/04 , H01L39/04
摘要： PURPOSE:To make a manufacture easy and to contrive the improvement of reliability by adhering an inner tank made of FRP to an outer tank made of FRP both of which are integrally formed with pressure inserting a glass mat, a glass nonwoven fabric, etc. impregnated with adhesives. CONSTITUTION:Between the flanges 2, 4 of an inner tank 13 and an outer tank 14 both of which are made of FRP, a material 15 placed with a glass fiber such as a glass mat 18, a glass nonwoven fabric 19, etc. impregnated with adhesives at random is provided and the adhesives are hardened by pressing. Since the glass mat 18, the glass nonwoven fabric 19, etc. have no continuous fiber in the radial direction, the effect of the reduction of the transmittance of a gas due to the mixing of glass fiber can be obtained. Even if the inner and the outer flanges have somewhat deformation or roughness, these are absorbed by the elasticity of the glass mat or the glass nonwoven fabric and a highly reliable adhesive structure can be obtained. This enables to obtain a cryostat made of FRP which is easy in manufacture and has good airtightness and high reliability.

9. 发明专利

JPS60109740A STATOR OF CANNED MOTOR 失效
公开(公告)号：JPS60109740A
公开(公告)日：1985-06-15
申请号：JP21391683
申请日：1983-11-16
申请人： HITACHI LTD
发明人： HIGASHIMURA YUTAKA , FUKUSHI YOSHISHIGE , FUJIOKA SHINEI , IWAASA SHIYUUZOU
IPC分类号： H02K5/132 , H02K5/128
摘要： PURPOSE:To improve the reliability by enabling to axially move one of covers at the end for coating the stator of a canned motor without losing a waterproof structure, thereby independently contacting the end cover with the bonded portion of the inside cylinder. CONSTITUTION:The end of a can which coats the molding resin 8 of a stator is divided into covers 5c, 5d, which are connected by a thin plate 23 of a stainless steel. The plate 23 is slackened to be movable axially between the covers 5c and 5d, connected over the entire periphery as a waterproof structure. The cover 5d is tapered, and contacted by a nut 21 with the tapered portion of the inside cylinder 4. Thus, the stator of the canned motor of the waterproof structure can be readily manufactured.

10. 发明专利

JPS609652B2 失效
公开(公告)号：JPS609652B2
公开(公告)日：1985-03-12
申请号：JP338078
申请日：1978-01-18
申请人： HITACHI LTD
发明人： TAKEUCHI RYOZO , FUKUSHI YOSHISHIGE , SHIMIZU TOSHIO , WATANABE HIROSHI , TAWARA TAKASHI
IPC分类号： H01F41/12 , H01F27/08

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