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41. 发明专利

JPH07191083A COMPENSATING REACTOR DEVICE FOR TESTING POWER CABLE 失效
公开(公告)号：JPH07191083A
公开(公告)日：1995-07-28
申请号：JP35491593
申请日：1993-12-24
申请人： TOKYO ELECTRIC POWER CO , SUMITOMO ELECTRIC INDUSTRIES , NISSIN ELECTRIC CO LTD
发明人： TSUCHIYA SHINICHI , YOKOYAMA KAZUNOBU , SUDO YOSHIJI , KAWAI KOHEI , WATANABE TAKASHI , KUWATA MINORU
IPC分类号： G01R31/12 , G01R31/14
摘要： PURPOSE:To easily perform withstand voltage tests on connecting sections between the cable heads of graded-insulated compensating reactors and cables. CONSTITUTION:The phase advancing capacity of a power cable to be tested is compensated by connecting graded-insulated compensating reactors 5 respectively housing reactor bodies 8 in parallel with each other. A disconnecting switch 15 is connected between the reactor body 8 and cable heads 11 and 12 in each reactor 5. When a withstand voltage testing voltage is applied across connecting sections between the cable heads 11 and 12 and cables, the reactor body 8 and a low-voltage terminal 10 are disconnected from the heads 11 and 12 by opening the switch 15 so that the testing voltage cannot be applied across the body 8 and terminal 10.

42. 发明专利

JPH03184315A NEUTRAL-POINT GROUNDING DEVICE 失效
公开(公告)号：JPH03184315A
公开(公告)日：1991-08-12
申请号：JP32301889
申请日：1989-12-13
申请人： NISSIN ELECTRIC CO LTD
发明人： KUWATA MINORU
IPC分类号： H01F30/12 , H02H3/02
摘要： PURPOSE:To simplify constitution when a node for the neutral-point grounding of a circuit is obtained by housing a grounding transformer, a neutral-point reactor and a series resistor in one tank. CONSTITUTION:In a neutral-point grounding device having a grounding transformer 1, a neutral-point reactor 2 grounding the neutral point of the grounding transformer 1 and a series resistor, the grounding transformer 1, the neutral- point reactor 2 and the series resistor are housed in one tank 15. The grounding transformer 1 is composed of a core 11 and a coil 12 wound on the core 11, and the neutral-point reactor 2 is manufactured as an electromagnetic shielding air core type constituted of a cylinder 13 for shielding consisting of aluminum, etc., and a reactor winding 14. The series resistor functions as a resistance value in combination by using a resistance winding as the reactor winding 14 organizing the neutral-point reactor 2.

43. 发明专利

JPS6413712A APPARATUS FOR NEUTRAL GROUNDING 失效
公开(公告)号：JPS6413712A
公开(公告)日：1989-01-18
申请号：JP17048387
申请日：1987-07-08
申请人： NISSIN ELECTRIC CO LTD
发明人： YOMO TATSUO , KUWATA MINORU
IPC分类号： H01F30/12
摘要： PURPOSE:To improve both of reliability and earthquake proof, and to make maintenance easy, by winding primary windings which are connected to respective transmission lines and specific secondary windings round the main legs of a grounding transformer, with the leakage impedance being formed between the primary and secondary windings to serve as a neutral reactor. CONSTITUTION:Since a grounding accident occurring in a transmission line 42 results in the flow of a magnetic flux C being cut off in a main leg 22, the balance of the magnetic flux in an upper and lower yokes 32, 34 is lost to cause a magnetic flux D of zero-phase-sequence component owing to the composite vector of magnetic fluxes A and B. Therefore, the magnetic flux D of zero-phase-sequence component flows in both of side legs 28 and 30, which causes current flow through secondary windings 50, 52 and 54 to form the leakage impedance between the primary windings 44, 46, 48 and the secondary windings 50, 52, 54 which serves as a neutral reactor. Moreover, since the primary windings 44, 46, 48 or the secondary windings 50, 52, 54 are of conductor with resistivity of 5-50muOMEGA.cm, so-called resistance wire, the conductor serves as series resistor.

44. 发明专利

JPS59172709A Air-core reactor 失效
标题翻译：空芯反应堆
公开(公告)号：JPS59172709A
公开(公告)日：1984-09-29
申请号：JP4840883
申请日：1983-03-22
申请人： Nissin Electric Co Ltd
发明人： NOGAWA SHIYUUICHI , KUWATA MINORU
IPC分类号： H01F27/36 , H01F30/08 , H01F39/00
CPC分类号： H01F37/005
摘要： PURPOSE:To control the inductance without local overheating by a method wherein an electromagnetic shield is composed of a plurality of short-circuited coils and short-circuit switches are provided to some of the short-circuited coils. CONSTITUTION:A plurality of short-circuited coils 4' are piled along the axial direction to form a shield and a coil 1 is inserted into the shield. Some 4'' of the short-circuited coils 4' are opened and closed by short-circuit switches 6. When a short-circuited coil 4'' with the short-circuit switch 6 is closed by the switch 6, it works as a shield to flux like other short-circuited coils 4' but when it is opened, as no current is induced in that coil, it has no effect on the flux produced by the coil 1. Therefore, the inductance of the coil 1 increases a little at this portion. With this constitution, the inductance of the reactor can be controlled by the ON-OFF of the short-circuited coils 4''.
摘要翻译：目的：通过一种电磁屏蔽由多个短路线圈组成并且短路开关提供给一些短路线圈的方法来控制电感而没有局部过热。构成：多个短路线圈4'沿着轴向堆叠形成屏蔽，线圈1插入屏蔽件中。短路线圈4'的大约4“由短路开关6断开。当短路开关6的短路线圈4”被开关6封闭时，它作为像其他短路线圈4'一样屏蔽焊剂，但是当它被打开时，由于在该线圈中没有电流感应，其对线圈1产生的磁通没有影响。因此，线圈1的电感增加一点在这一部分。利用这种结构，可以通过短路线圈4“的导通断开来控制电抗器的电感。

45. 发明专利

JPS574106A COOLER FOR MOLDED COIL 失效
公开(公告)号：JPS574106A
公开(公告)日：1982-01-09
申请号：JP7797180
申请日：1980-06-10
申请人： NISSIN ELECTRIC CO LTD
发明人： OSHIMIBE MITSUMASA , EJIRI HIROMICHI , KUWATA MINORU
IPC分类号： H01F27/18 , H01F27/22
摘要： PURPOSE:To enable to cool sufficiently even a molded coil for large capacity by a method wherein a path for circulation of a refrigerant is formed in the molded coil, and the evaporable refrigerant is made to circulate in the path. CONSTITUTION:The molded coil 3 is consisted of a conductor 4 wound around in a coil type and a mold part 5 being molded thereof with a resin, and the path 6 for circulation of the refrigerant is formed in the mold part 5. The evaporable refrigerant of fluorine 11, etc., is sent in the path 6 in a liquid phase condition from a refrigerant tank 8 through a feeding pipe 9. The path 6 is formed at the same time when the mold part 5 is to be molded, the upper and lower ends thereof are opened respectively, the refrigerant is fed from the lower end of the path 6, and is heated and evaporated during passing in the path 6 by the mold part 5 being risen the temperature thereof owing to generation of heat of the conductor 4, and heat is taken away from the mold part 5 by latent heat at this time. Accordingly even the molded coil of large capacity can be cooled sufficiently effectively.

46. 发明专利

JP2000308261A AC FILTER 失效
公开(公告)号：JP2000308261A
公开(公告)日：2000-11-02
申请号：JP10759299
申请日：1999-04-15
申请人： NISSIN ELECTRIC CO LTD
发明人： KUWATA MINORU
IPC分类号： H02J3/01 , G05F1/70 , H02J3/18
摘要： PROBLEM TO BE SOLVED: To enabled compensation with higher accuracy of deviation by continuously varying the resonance frequency, without enlarging facility scale, moreover without being affected by the vibration of reactor due to the electromagnetic effect effectively using the internal space of capacitor case, in an AC filter of the serial resonance circuit structure of the self-tuning system for power. SOLUTION: A main capacitor 10 is accommodated within a capacitor case 13 that is filled with insulation oil 5, one end of this capacitor 10 is connected to an AC power line 4, while the other end is grounded via a reactor 2, a series resonance circuit 11 for filter is formed of the main capacitor 10 and reactor 2 and a fixed electrode 15 of variable capacitor 12 of the parallel flat plate structure to compensate for deviation in the resonance frequency of the series resonance circuit 11 is provided in the ground insulating region at the external side of the main capacitor 10 within the case 13, and a grounded variable electrode 16 of the variable capacitor 12, in which the opposing distance to electrode 15 changes due to the compensation, is provided between this electrode 15 and the internal wall surface of the case 13.

47. 发明专利

JP2000114060A OIL FILLED COIL EQUIPMENT 失效
公开(公告)号：JP2000114060A
公开(公告)日：2000-04-21
申请号：JP28664298
申请日：1998-10-08
申请人： NISSIN ELECTRIC CO LTD
发明人： KUWATA MINORU
IPC分类号： H01F27/12 , H01F30/12 , H01F37/00
摘要： PROBLEM TO BE SOLVED: To provide an oil-filled coil equipment for realizing miniaturization and setting space reduction by removing any switch box. SOLUTION: This oil-filled coil equipment is provided with an equipment main body 3 housed in a tank 2 in which a coil 5 is wound around an iron core 4; insulating coil 6 packed in the tank 2 while a gas space is left at the upper part in the tank 2, and immersed in the equipment main body 3; and auxiliary equipments such as a switch 9 and an arrester 10 connected with the line side of the equipment main body 3, provided in the gas space 7, and mounted to the inner wall of the tank 2.

48. 发明专利

JPH1154340A REACTOR 失效
公开(公告)号：JPH1154340A
公开(公告)日：1999-02-26
申请号：JP22763197
申请日：1997-08-07
申请人： NISSIN ELECTRIC CO LTD
发明人： KUWATA MINORU
IPC分类号： H01F27/36 , H01F30/08
摘要： PROBLEM TO BE SOLVED: To provide an electromagnetically shielded reactor, which has a simple structure and the inductance which continuously changes. SOLUTION: A reactor is provided with an air-core coil 1, inner mobile shields 3a and 3b which are provided coaxially to the coil 1 on the outside of the coil 1 in such a state that the shields 3a and 3b can move in the axial direction of the coil 1 and composed of cylindrical nonmagnetic conductors, and an outer fixed shield 4 which is provided coaxially to the coil 1 on the outside of the shields 3a and 3b and composed of a cylindrical nonmagnetic conductor. The outside electromagnetic shield of the coil 1 is doubled with the mobile shields 3a and 3b and fixed shield 4.

49. 发明专利

JPH09246058A WOUND IRON CORE 失效
公开(公告)号：JPH09246058A
公开(公告)日：1997-09-19
申请号：JP8986296
申请日：1996-03-06
申请人： NISSIN ELECTRIC CO LTD
发明人： NODA KENSUKE , KUWATA MINORU , NOGAWA SHUICHI
IPC分类号： H01F27/25
摘要： PROBLEM TO BE SOLVED: To avoid local generation of eddy current and generation of magnetic saturation, by dispersing magnetic flux distributed on the winding start part and the winding end part of a silicon steel plate, along the longitudinal direction of the silicon steel plate. SOLUTION: End edges of the winding start part 2 and the winding end part 3 of a silicon steel plate 1 are obliquely cut so as to slant to the longitudinal direction of the silicon steel plate 1. It is considered that magnetic flux concentrates along end edges of the winding start part 2 and a winding end part 3 of the silicon steel plate 1, so that the shape wherein the end edges are slanted is used, and the magnetic flux is dispersed on the slant direction, i.e., along the longitudinal direction of the silicon steel plate 1. Thereby generation of eddy current is reduced, and magnetic flux density can be reduced.

50. 发明专利

JPH0851031A CORE STRUCTURE FOR TRANSFORMER WITH GAP 失效
公开(公告)号：JPH0851031A
公开(公告)日：1996-02-20
申请号：JP21517194
申请日：1994-08-05
申请人： NISSIN ELECTRIC CO LTD
发明人： KUWATA MINORU
IPC分类号： C22C38/02 , H01F27/24 , H01F27/245
摘要： PURPOSE:To enhance the reliability of a core structure while simplifying the core stopper metal by composing the leg core and the yoke core of a non- oriented silicon steel plate and setting the abutting part between the leg core and the yoke core normal to the longitudinal direction of the leg core or in parallel therewith. CONSTITUTION:A leg core 1 and yoke cores 2, 3 are composed of non-oriented silicon steel plate and each leg core 1 is abutted, on the upper and lower end faces thereof, against the longitudinal side faces of the yoke cores 2, 3 so that the abutting part 5 intersects the longitudinal direction of the leg core 1 perpendicularly. A gap 4 intersects the longitudinal direction of the leg core 1 perpendicularly and an external force (p) prevailing over the magnetic attraction in the gap is imparted by an appropriate tightening metal along the longitudinal direction of the leg core 1. However, the external force (p) is applied perpendicularly to the abutting part 5 and a component of force is not generated toward the side face of the core 1. Since a stopper metal for preventing the shift on the side face is simplified, the external force (p) can be increased sufficiently and thereby the reliability is enhanced.

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