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11. 发明专利

JPH0684672A AMMETER FOR BUS 失效
公开(公告)号：JPH0684672A
公开(公告)日：1994-03-25
申请号：JP23345492
申请日：1992-09-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO
IPC分类号： G01R15/18 , H01F38/28 , H01F40/06 , G01R15/02
摘要： PURPOSE:To downsize ammeter for bus by detecting current flowing through a bus by means of a plurality of current detectors located at same position of bus. CONSTITUTION:A plurality of coils 3a, 3b are wound around an annular insulator core 2 disposed around a bus 1 and an external impedance ZL connected with the coils 3a, 3b is set as follows; ZL>N.E.(M-1)/(5X10 .I) where, M: number of coils, N: number of turns of each coil, E: voltage induced in the coil (V), I: current to be measured (A). Since a plurality of coils 3a, 3b are wound around a common core 2 disposed around the bus 1, ammeter can be downsized and since the external impedance ZL connected with the coils 3a, 3b is set higher than a predetermined value, accuracy does not deteriorate in the measurement of current.

12. 发明专利

JPH0643189A AMMETER 失效
公开(公告)号：JPH0643189A
公开(公告)日：1994-02-18
申请号：JP23948992
申请日：1992-09-08
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO
IPC分类号： G01R15/18 , G01R19/00 , G01R15/02
摘要： PURPOSE:To obtain an ammeter with a high measurement accuracy when measuring bus current according to the induced voltage of a coil. CONSTITUTION:Split coils 41-412 formed by winding a coil winding on the outer periphery surface of a cylinder core by a specific number of turns are constituted. Terminals 91-912 for regulating voltage are provided near the winding end of the coils windings of the split coils 41-412. Further, the split coils 41-412 are laid out on a plane which is vertical to the axis center of a bus 1 and are connected in series with an equal spacing at the same distance in reference to the axis center of the bus 1 so that the center axis may be equal to the tangential line of a circle in reference to the axis center of the bus 1.

13. 发明专利

JPH0250421B2 失效
公开(公告)号：JPH0250421B2
公开(公告)日：1990-11-02
申请号：JP14530285
申请日：1985-07-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO , YAMADA TADATOSHI , JIZO YOSHIHIRO
IPC分类号： G01N27/72

14. 发明专利

JPH01109498A SUPERCONDUCTING SIGNAL LINE 失效
公开(公告)号：JPH01109498A
公开(公告)日：1989-04-26
申请号：JP26538287
申请日：1987-10-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO
IPC分类号： G01R33/02 , G01D5/245 , G01R33/035 , G08C19/00 , H01F6/06 , H01L39/00 , H05K9/00
摘要： PURPOSE:To transmit a signal without receiving the influence of noise by transmitting the signal with a magnetic field in the superconductor tube of a loop shape. CONSTITUTION:A primary coil 7 to be a signal source is coiled to one side of a core body 6 of the loop shape composed of the material of high permeability and a secondary coil 8 to be a detecting part is coiled to the other side of the core body 6. The core body 6, the primary coil 7 and the secondary coil 8 are received in a superconductor tube 9 of the loop shape composed of superconductor. Then, the superconducting tube 9 has structure not to be electrically connected in the surrounding direction of a section and cooled. A voltage generated in a coil 3 excites the primary coil 7 and a magnetic flux in a major axis direction is generated in the core body 6. Thus, the voltage is generated to the secondary coil 8 and processed by a revolution counter 5 and the number of revolution is displayed. Since the core body 6, the primary coil 7 and the secondary coil 8 are covered with the superconductor tube 9, they do not receive the influence of the external magnetic field of the noise, etc.

15. 发明专利

JPH01108714A CURRENT TRANSFORMER 失效
公开(公告)号：JPH01108714A
公开(公告)日：1989-04-26
申请号：JP26538387
申请日：1987-10-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO
IPC分类号： H01F38/28 , H01L39/00 , H05K9/00
摘要： PURPOSE:To prevent AC and DC external magnetic fields from entering a secondary winding by a method wherein a ring-shape shield composed of a superconductor is provided along at least one circumferential direction of a primary conductor and the secondary winding is provided inside the shield. CONSTITUTION:A shield 6 composed of a superconductor surrounding both side ends and circumferential parts of a core 2 and a secondary winding 3 is provided and the temperature of the shield 6 is kept below the critical temperature by a heat insulating container 7. The heat insulating container 7 contains coolant and has a structure holding the core 2 and the secondary winding 3. With this constitution, the secondary winding 3 is shielded from all external magnetic fields regardless to AC components or DC components by the Meissner effect of the superconductor of which the shield 6 is composed so that misoperation can be avoided and the sectional area of the core 2 which is enlarged in order to avoid misoperation in the conventional constitution can be reduced and the weight can be reduced.

16. 发明专利

JPS63134972A CURRENT TESTING METHOD FOR SWITCHGEAR 失效
公开(公告)号：JPS63134972A
公开(公告)日：1988-06-07
申请号：JP28067486
申请日：1986-11-27
申请人： MITSUBISHI ELECTRIC CORP
发明人： YAMASHITA YUJI , OGURA SHINZO
IPC分类号： H01H1/00 , G01R31/327 , G01R31/333
摘要： PURPOSE:To test a switchgear of large capacity by a testing equipment of small capacity, by thinning out a contact of the switchgear at a suitable ratio, and executing an electric conduction test by using this thinned-out contact. CONSTITUTION:Instead of a regular arc contact and a main movable contact, a movable are contact 30a and a main movable contact 27a, which have thinned out contact pieces 100, 200 to 1/2 are integrated into a switchgear. In this state, a test current which has been decreased in accordance with a ratio of said thinning-out is conducted electrically to said contact, and the capacity of the contact is verified. In such a way, the verification of a switchgear of a current value exceeding the capacity of the present testing equipment can be executed by the present testing equipment.

17. 发明专利

JPS61285623A VACUUM BREAKER 失效
公开(公告)号：JPS61285623A
公开(公告)日：1986-12-16
申请号：JP12744385
申请日：1985-06-12
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAJIWARA MASAYUKI , OGURA SHINZO
IPC分类号： H01H33/66

18. 发明专利

JPS61279014A VACUUM BREAKER 失效
公开(公告)号：JPS61279014A
公开(公告)日：1986-12-09
申请号：JP12290285
申请日：1985-06-04
申请人： MITSUBISHI ELECTRIC CORP
发明人： KAJIWARA MASAYUKI , OGURA SHINZO
IPC分类号： H01H33/18 , H01H33/66

19. 发明专利

JPS61270655A METHOD AND INSTRUMENT FOR MEASURING CONTENT OF PARAMAGNETIC ADDITIVE 失效
公开(公告)号：JPS61270655A
公开(公告)日：1986-11-29
申请号：JP11262085
申请日：1985-05-25
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO
IPC分类号： G01N27/72
摘要： PURPOSE:To permit easy arithmetic processing and to improve accuracy by making use of the differential voltage of search coils which is proportional to the content of a paramagnetic material. CONSTITUTION:A DC magnetic field is changed in the long axis direction of a fuel rod in such a manner that the direction of the DC magnetic field H2 by a magnetization coil 13a is made opposite from the DC magnetic field H4 by a magnetization coil 13b. The search coils 14, 15 are attached to a supporting rod 16 and are oscillated in the long axis direction of the fuel rod 1 by an oscillating device 17 connected to the rod 16. The coils 14, 15 are so connected that the difference between the respective induced voltage is taken. The differential value thereof is amplified K times by an amplifier 8 and is inputted to a recorder 19 which displays the content of the paramagnetic additive. The output is proportional to the content of the paramagnetic additive simply by amplifying the induced voltages of the coils 14, 15 while the rod 1 is held still and therefore the arithmetic processing is easy and the accuracy is improved.

20. 发明专利

JPH03146874A CURRENT DETECTING DEVICE 失效
公开(公告)号：JPH03146874A
公开(公告)日：1991-06-21
申请号：JP28293789
申请日：1989-11-01
申请人： MITSUBISHI ELECTRIC CORP
发明人： OGURA SHINZO , SHIMADA MOTOHIRO
IPC分类号： G01R15/24 , G01R19/00
摘要： PURPOSE:To simplify mounting work for a device and repairing/adjusting works for a magnetic sensor by providing a ferromagnetic member so that both end parts are positioned on the outer peripheral surface of a conductor and providing the magnetic sensor between both end parts of this ferromagnetic member. CONSTITUTION:Holes 1a, 1b penetrating inner/outer peripheral surfaces are provided in the cylindrical conductor 1 and a spiral notch 1c going the round of conductor 1 from the hole 1a up to the hole 1b is provided. The ferromagnetic member 6 is provided so as to encircle a detection part and both end parts of the member is positioned on the outer peripheral surface of the conductor 1. The member 6 consists of a bar-shaped part 6a provided inside(hollow part) of the conductor 1 and two L-shaped parts 6b connected to the bar-shaped part 6a with penetrating the holes 1a, 1b. The magnetic sensor 3 is provided between both end parts of the member 6 on the outer peripheral surface of conductor 1 and a sensitivity direction of sensor 3 is subjected to face to the shaft direction of conductor 1. By means of detecting a magnetic field caused from a current I flowing to the detection part 1d by the sensor 3 and forwarding it through photoelectric conversion and amplification parts, an electrical output proportional to the current I is detected.

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