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11. 发明专利

JPS636467A ZERO PHASE CURRENT DETECTING DEVICE USING MAGNETO-OPTICAL ELEMENT 失效
公开(公告)号：JPS636467A
公开(公告)日：1988-01-12
申请号：JP15003686
申请日：1986-06-26
申请人： HITACHI LTD
发明人： TAKAHASHI GENJI , HIGAKI MASARU
IPC分类号： G01R15/24 , G01R29/16
摘要： PURPOSE:To share a sensor having magneto-optical effect with an optical current transformer too for phase current detection by detecting the current flowing in each phase by the use of an optical current sensor utilizing a magneto-optical effect and finding the sum of each detecting value. CONSTITUTION:Light generated from a light source 24 is conducted to a polarizer 18 by means of an optical fiber 26 to be made incident on a detector 16 as straight polarized light at an polarizing angle of 45 deg., then a plane of polarization rotates due to the magnetic field induced by the current flowing in a conductor 10 when said light passes through the detector 16. The polarized light which is made incident on a detector 20 is inputted to a receiver 28 through an optical fiber 30 and a voltage proportional to a phase current of each phase is outputted from an operational amplifier part 29 to an output terminal (a) of the optical CT. The voltage outputted to a terminal (b) of the zero phase output is inputted to a computing element 31, thus the zero phase current I0 is outputted by each phase current found from the inputted voltage.

12. 发明专利

JPS62865A OPTICAL CURRENT TRANSFORMER 失效
公开(公告)号：JPS62865A
公开(公告)日：1987-01-06
申请号：JP13999885
申请日：1985-06-26
申请人： HITACHI LTD
发明人： KANAI MINORU , TAKAHASHI GENJI , HIGAKI MASARU
IPC分类号： G01R15/24
摘要： PURPOSE:To measure small - large currents that an electric power system requires with high precision by specifying the range of the Verdet constant of a material which is used for a Faraday cell installed wound around a conductor through which a current to be measured flows. CONSTITUTION:The Faraday cell 11 is provided wound around the conductor 10 through which the current to be measured flows, and the current flowing through the conductor 10 is detected on the basis of the angle of polarization rotation of light traveling in the Faraday cell 11. For a precise measurement (within an about + or -2% error), the AC component of an output voltage inputted from a photodiode 5 to an initial-stage circuit needs to be at least 5mV and never exceeds 10Vpeak so that a signal processing circuit 6 is not saturated. For the purpose, the Verdet constant of the Faraday cell 11 is set beteen 1.2X10 and 5.2X10 (rad/AT). The Verdet constant is determined by the wavelength of a light source 2 and the material of the Faraday cell 11, so the light source 2 and Faraday cell 11 use a GaAlAs systme and borosilicate crown glass which have light emission wavelength within the range of about 800-900nm.

13. 发明专利

JPS618909A Winding construction of stationary induction electric apparatus 失效
标题翻译：静电感应电机的卷绕结构
公开(公告)号：JPS618909A
公开(公告)日：1986-01-16
申请号：JP12960384
申请日：1984-06-22
申请人： Hitachi Ltd
发明人： KUMASAKA TAKAO , FUJIWARA SHIGETAKA , KIYONO KAZUYUKI , UENO YOSHITO , HIGAKI MASARU
IPC分类号： H01F27/28 , H01F27/32
CPC分类号： H01F27/2876 , H01F27/322
摘要： PURPOSE:To enable equalizing the rise of temperature in each coil by making the diameters of innermost and outermost vertical ducts smaller than the diameters of the other vertical ducts. CONSTITUTION:The diameter delta1 of innermost and outermost vertical duct 3 is made smaller than the diameter delta2 of the other vertical ducts 3. The flow rate of a refrigerant in the innermost and the outermost vertical ducts 3 is reduced and the reduced quantity can be added to the flow rate of the central vertical ducts 3. That is, in accordance with the quantity of heat given to each vertical duct 3, the flow rate of the refrigerant can be adjusted and the rise of temperature of the refrigerant in each vertical duct can be equalized. This can make the rise of temperature of each coil 4 equal.
摘要翻译：目的：通过使最内侧和最外侧的垂直管道的直径小于其他垂直管道的直径，使每个线圈中的温度上升均衡。构成：使最内侧和最外侧的垂直导管3的直径δ1小于其他垂直导管3的直径delta2。最内侧和最外侧的垂直导管3内的制冷剂的流量减少，并且可以添加减少的量也就是说，根据每个垂直管道3的热量，可以调节制冷剂的流量，并且可以调节每个垂直管道中的制冷剂的温度升高平衡这可以使每个线圈4的温度升高相等。

14. 发明专利

JPS60258839A ION BEAM APPARATUS 失效
公开(公告)号：JPS60258839A
公开(公告)日：1985-12-20
申请号：JP11459484
申请日：1984-06-06
申请人： HITACHI LTD
发明人： SATOU TADASHI , KUROSAWA TOMOE , FUJIWARA SHIGETAKA , HIGAKI MASARU
IPC分类号： H01J37/317 , C23C14/22 , C23F4/00 , H01F41/14 , H01F41/18 , H01J37/305 , H01J37/32 , H01J37/34 , H01L21/203
摘要： PURPOSE:To reduce leakage of magnetic field to the target and substrate by employing such system where the plasma is confined by means of magnetic field to be produced through N and S poles of permanent magnet arranged alternatively. CONSTITUTION:A plasma generating container 32 forming a plasma generating chamber will also function as an anode for producing arc discharge between a cathode 31. 16 rows of permanent magnets 33 magnetized vertically are provided on the outercircumference of the container 32 while alternating the polarity and two permanent magnets having same width and height and predetermined length are on the side of holding a filament 31. Consequently, leakage of magnetic field is reduced to the level of terrestrial magnetism resulting in reduction of leakage to the target and the substrate.

15. 发明专利

JPS609650B2 失效
公开(公告)号：JPS609650B2
公开(公告)日：1985-03-12
申请号：JP2666680
申请日：1980-03-05
申请人： HITACHI LTD
发明人： MIKI ATSUSHI , MORI ETSUNORI , HOSHI MINORU , HIGAKI MASARU
IPC分类号： H01F27/28 , H01F27/34
摘要： A winding for a static induction apparatus such as a transformer, a reactor and the like comprises a plurality of interleaved coils each formed by winding an electrically insulated strand conductor in a radial spiral. The coils are stacked axially and electrically connected in series between a line terminal and another terminal such as a neutral terminal. The winding is divided into a plurality of blocks each including a plurality of ones of the interleaved coils. The number of turns of each coil belonging to the block on the other terminal side is decreased as compared with that of each coil belonging to the block located closer to the line terminal, to thereby reduce the series electrostatic capacitance of the coils stepwise from one to another block starting from the one located on the line terminal side. The distribution constant is thus decreased. Favorable surge withstanding characteristics are attained, reliable insulation is assured and the winding can be realized in a reduced size.

16. 发明专利

JPS5874022A FORCED OIL CIRCULATION TYPE TRANSFORMER 失效
公开(公告)号：JPS5874022A
公开(公告)日：1983-05-04
申请号：JP17084482
申请日：1982-10-01
申请人： HITACHI LTD
发明人： HIGAKI MASARU , HIRAISHI KIYOTO , MIYAO HIROSHI
IPC分类号： H01F27/28 , H01F27/12
摘要： PURPOSE:To eliminate generation of discharge within the oil with simplified structure and to improve reliability of insulation by forming the inlet end surface of oil guides of the lower insulator in the specified curvature of radius in order to make less disturbance of oil flow. CONSTITUTION:The inlet end surfaces of oil guides 11, 12 of insulator 8 are formed with the specified curvature of radius R (5mm. or more is preferable) in order to make smooth oil flow in the vicinity of inlet of oil guides 11, 12 provided on the insulator 8 above the hole 20 of an iron core tightening metal 5 at the lower part and to reduce generation of static field in this area. Thereby, the oil sent to the iron core tightening metal 5 from the cooling device by means of a pump 5 is less disturbed and is sent to coils. According to this structure, the generation of discharge within the oil can be eliminated with simplified structure and reliability of insulation can be enhanced.

17. 发明专利

JPS5372125A STATIC INDUCTION APPARATUS 失效
公开(公告)号：JPS5372125A
公开(公告)日：1978-06-27
申请号：JP14772576
申请日：1976-12-10
申请人： HITACHI LTD
发明人： HIGAKI MASARU , MIYAO HIROSHI , HONDA AKIJIROU
IPC分类号： H01F5/06 , H01F27/24 , H01F27/28
摘要： PURPOSE:To reduce electric charge accumlated on the surface of an insulating material, and to prevent generation of discharge in oil caused by current of oil.

18. 发明专利

JPH08227816A AMORPHOUS WOUND CORE 失效
公开(公告)号：JPH08227816A
公开(公告)日：1996-09-03
申请号：JP27526295
申请日：1995-10-24
申请人： HITACHI LTD
发明人： SAITO TATSU , HAGIWARA SHUYA , HIGAKI MASARU , YAMAGUCHI SHOYU , SAKAMOTO MASARU , YAMANAKA KOJI
IPC分类号： H01F41/02 , H01F27/24 , H01F27/25
摘要： PURPOSE: To increase a productivity and magnetic characteristics of a core by forming the core in such a structure that nearly rectangular blocks which are made by winding thin belts in the stacking direction in a specified thickness and which have specified outer diameters are substantially adhered tightly to each other. CONSTITUTION: An amorphous magnetic alloy-made thin belt 2 is wound from a material hoop 4 around an iron block 3 which is nearly square and has a specified size. By this method, a set of nearly square-shaped three iron blocks 3a, 3b, and 3c, each of which has curved sections only at four corners, are adhered tightly at linear sections. At the four corners, nearly crescent-shaped spaces 7 are formed between the iron blocks 3a, 3b, and 3c. By this, over- tightening is prevented at the corners of a core and thereby the transmission of excess compressive force to the inside of a core window can be prevented and the deterioration in characteristics of the amorphous magnetic alloy-made thin belts can be remarkably lessened.

19. 发明专利

JPH02143173A OPTICAL DC TRANSFORMER 失效
公开(公告)号：JPH02143173A
公开(公告)日：1990-06-01
申请号：JP29706688
申请日：1988-11-24
申请人： HITACHI LTD
发明人： HIGAKI MASARU , TAKAHASHI GENJI
IPC分类号： G01R15/24
摘要： PURPOSE:To make correction constantly for the error caused from temperature characteristic, secular change, etc., by electrically detecting orthogonal two components of a polarized light to which a magnetic or electrical light effect is given by a sensor and processing with a prescribed calculation. CONSTITUTION:The orthogonal two components of the polarized light to which the magnetic effect outputted from a Faraday cell sensor impressed with a AC magnetic file is given, are detected by an analyzer and photoelectric conversion circuits 8, 9 as the electrical signals Ip, Is expressed in equations I, II. Then, AC components of the signals Ip, Is by BPF 101, 102 of arithmetic circuits are divided in a divider 104, whereby a ratio of changing constants k1, k2 is decided. This ratio and DC components of the signals Ip, Is by LPF 105, 106 are calculated in a multiplier 108, subtraction device 109, adding device 110 and divider 111, then a Faraday rotation angle theta1 corresponding to the AC magnetic field is accurately obtained by correcting the error based on the change of constants caused by the temperature characteristic, secular change, etc. The same can be made for an electric field using a Pockels cell sensor.

20. 发明专利

JPH0282167A CURRENT MEASURING INSTRUMENT WITH OPTICAL SYSTEM 失效
公开(公告)号：JPH0282167A
公开(公告)日：1990-03-22
申请号：JP23466288
申请日：1988-09-19
申请人： HITACHI LTD , CHUBU ELECTRIC POWER
发明人： TAKAHASHI GENJI , HIGAKI MASARU , TAKAI TSUTOMU , KANAI MINORU , TAKAGI ISAO
IPC分类号： G01R15/24
摘要： PURPOSE:To measure currents in the range from the small to the large currents in the manner of using a single magnetooptical element by branching an optical signal outputted from a light detecting element to plural optical signals having the different light intensities and processing the signals with a photoelectric conversion respectively. CONSTITUTION:By the light detecting element 44, optical signals P0, S0 having the components of a P-polarization and a S-polarization among the optical signals A are transmitted to optical branching devices 56, 58 respectively. In the branching devices 56, 58, the signals P0, S0 are branched to the optical signals P1, P2, S1, S2 respectively and set in the relations of P1>P2, S1>S2, P1/P2=S1/S2. Further, the signals P1, S1 are set to correspond to the currents for the measurement in the small currents range, and the signals P2, S2 are set to correspond to those in the large currents range. The signals P1 - S2 are subjected to photoelectric conversion respectively by light receiving elements 68, 72, 70, 74. Voltage signals VA, VB proportional to the current (i) are calculated in the manner of processing the signals CH-1,CH-2 respectively based on the signals P1, S1 and P2, S2 subjected to the photoelectric conversion. Then, the signal VA is outputted up to the time when the signal VA exceeds a rated value, and when it exceeds the rated value, the signals VB is outputted.

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