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1. 发明专利

JP2003199219A GROUND INSTALLATION TYPE TRANSFORMER DEVICE 审中-公开
公开(公告)号：JP2003199219A
公开(公告)日：2003-07-11
申请号：JP2001396796
申请日：2001-12-27
申请人： HITACHI LTD
发明人： HOSOKAWA MASAO , KANEDA HIDETOSHI , FUKUI KAZUMOTO
IPC分类号： H01F27/08 , H02B1/28 , H02B1/56
摘要： PROBLEM TO BE SOLVED: To secure heat radiation, and to prevent rain, dust and the like from entering, in a ground installation type transformer device. SOLUTION: An opening varying means is provided that changes the opening area of a ventilating window depending on pressure or temperature inside an external box or inside a transformer. COPYRIGHT: (C)2003,JPO

2. 发明专利

JP2003163124A THREE-PHASE TRANSFORMER 审中-公开
公开(公告)号：JP2003163124A
公开(公告)日：2003-06-06
申请号：JP2001360891
申请日：2001-11-27
申请人： HITACHI LTD
发明人： URATA SHINYA , INAGAKI KATSUTOSHI , KANEDA HIDETOSHI , HOSOKAWA MASAO , FUKUI KAZUMOTO
IPC分类号： H01F30/12
摘要： PROBLEM TO BE SOLVED: To provide a three-phase transformer whose iron core coil assembly body has an almost round-shaped section and which improves a share of occupation in a tank having a cylindrical shape. SOLUTION: The three-phase transformer is provided with an iron core coil assembly body 1 assembling an iron core 11 and a coil 12, and with a cylindrical tank 2 to store the iron core coil assembly body 1. A multi-layer winding structure is constituted such that the iron core coil assembly body 1 has a section closely resembling to a round shape, that the iron core is composed of three interphase iron cores 11, and that at least one of the coils 12 resembles the winding shape of each leg closely to a lozenge. COPYRIGHT: (C)2003,JPO

3. 发明专利

JPH1092665A V-CONNECTION TRANSFORMER 失效
公开(公告)号：JPH1092665A
公开(公告)日：1998-04-10
申请号：JP24491396
申请日：1996-09-17
申请人： HITACHI LTD
发明人： SAWAGUCHI TOMOYUKI , HOSOKAWA MASAO , MATSUDA YOJI , HORIUCHI MASAYUKI
IPC分类号： H01F30/12
摘要： PROBLEM TO BE SOLVED: To reduce the unbalanced impedance, etc., of a V-connection transformer by reducing the difference between the ambient temperatures of the upper and lower coils of the transformer, by constituting the first- and second-phase windings of the transformer with serially connected primary windings and serially connected secondary windings, and housing the primary and secondary windings in one container. SOLUTION: An upper transformer 1 is constituted of equally constituted coils 12 and 13 and a core 11. A coil support supports the coils 12 and 13 and fixes the coils 12 and 13 in the vertical direction. The core 11 is fixed in a state where the core 11 is passed through the annular rings formed of the coils 12 and 13. A lower transformer 2 has the same constitution as the upper transformer and is composed of coils 22 and 23, a core 21, a coil support, and fasteners. The transformers 1 and 2 are arranged with the transformer 1 on the top side and the transformer 2 on the bottom side, so that the coils 22 and 23 can be respectively positioned below the coils 22 and 23. The end sections of the coils 12 and 13 are respectively connected to a U-phase terminal and a W-phase terminal, and the end sections of both coils 22 and 23 are connected to a V-phase terminal. Therefore, the temperature-dependent phase-to-phase characteristic unbalance of a V-connection transformer can be suppressed.

4. 发明专利

JPH1092651A WOUND AMORPHOUS CORE TRANSFORMER 失效
公开(公告)号：JPH1092651A
公开(公告)日：1998-04-10
申请号：JP24763296
申请日：1996-09-19
申请人： HITACHI LTD
发明人： HORIUCHI MASAYUKI , INAGAKI KATSUTOSHI , HOSOKAWA MASAO
IPC分类号： H01F27/24 , H01F27/26
摘要： PROBLEM TO BE SOLVED: To reduce the open circuit loss of a wound amorphous core and prevent the brittle fracture of the core. SOLUTION: In a wound amorphous core transformer constructed so that a transformer main body constituted of a wound core 1 of an amorphous thin steel strip and a coil 2 which is composed of pluralities of primary and secondary coils and inserted into the core 1 can be supported evenly, a horizontal surface is formed with the internal surface of the coil 2 and other supporting members 4, 8, 6, and 7 and the transformer main body is evenly supported by the horizontal surface. Therefore, the open circuit loss of the core 1 can be reduced and such a structure that does not easily allow a brittle amorphous fragment to enter is obtained, because the stress applied to the core 1 becomes even.

5. 发明专利

JPH0250574B2 失效
公开(公告)号：JPH0250574B2
公开(公告)日：1990-11-02
申请号：JP16396782
申请日：1982-09-22
申请人： HITACHI LTD
发明人： HOSOKAWA MASAO , KISHI TSUNEO , TAKAHASHI TAKESHI
IPC分类号： H01H33/70 , H01H33/16

6. 发明专利

JPS643302B2 失效
公开(公告)号：JPS643302B2
公开(公告)日：1989-01-20
申请号：JP9941583
申请日：1983-06-06
申请人： HITACHI LTD
发明人： NAKAMURA TETSUO , DAIMON GORO , HOSOKAWA MASAO
IPC分类号： H01H33/30 , H01H33/42

7. 发明专利

JPS58178931A Gas insulated electric device 失效
公开(公告)号：JPS58178931A
公开(公告)日：1983-10-20
申请号：JP6100582
申请日：1982-04-14
申请人： Hitachi Ltd
发明人： HOSOKAWA MASAO , HIRASAWA KUNIO , YAMAGUCHI MOTOO , ASAI YOSHITO
IPC分类号： H01H33/64

8. 发明专利

JPS58163110A GAS BUSHING 失效
公开(公告)号：JPS58163110A
公开(公告)日：1983-09-27
申请号：JP4472682
申请日：1982-03-23
申请人： HITACHI LTD
发明人： HOSOKAWA MASAO , TAKEUCHI SHIGETAKA , OKUMURA KIYOSHI
IPC分类号： H01B17/28 , H01B17/36

9. 发明专利

JPS5846819A LINE BREAKAGE SYSTEM 失效
公开(公告)号：JPS5846819A
公开(公告)日：1983-03-18
申请号：JP14222381
申请日：1981-09-11
申请人： HITACHI LTD
发明人： TAKAHASHI ISAO , HIRASAWA KUNIO , OZAWA ATSUSHI , HOSOKAWA MASAO , MAKINO JIYUNICHI
IPC分类号： H02H3/02 , H02H3/00

10. 发明专利

JPS56158966A METHOD AND CIRCUIT FOR MEASURING OPENING TIME DIFFERENCE OF BREAKER 失效
公开(公告)号：JPS56158966A
公开(公告)日：1981-12-08
申请号：JP6219780
申请日：1980-05-13
申请人： HITACHI LTD
发明人： SENDA YUTAKA , SATOU MINORU , KASHIMURA SHIYOUICHI , HASHIMOTO TAKESHI , HOSOKAWA MASAO
IPC分类号： G01R31/327 , G01R31/333 , G01R31/32
摘要： PURPOSE:To measure a difference in opening time efficiently by coupling an AC power source electromagnetically with the closed circuit consisting of a main contactor, making resistor and auxiliary contactor. CONSTITUTION:With the series circuit of a resistor 2A and contactor 3A of the closed circuit 4A including a main contactor 1A, making resistor 2A and the auxiliary contactor 3A, two current transformers 11A and 12A are coupled electromagnetically. One transformer 11A has an AC power source 13A, and the other transformer 12A a current detector 15A. In breaking operation, the auxiliary contactor 3A opens first to cease the current of the detector 15A. Next, when the main contactor 1A opens, the current of the detector 7A disappears. An opening time difference is therefore measured by the difference in detection time between two detectors. Thus, the measurement is taken with the assembly completed, so that the measuring operation will be performed efficiently.

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