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101. 发明专利

JP2000208010A VACUUM CIRCUIT BREAKER 失效
公开(公告)号：JP2000208010A
公开(公告)日：2000-07-28
申请号：JP1081699
申请日：1999-01-19
申请人： MITSUBISHI ELECTRIC CORP
发明人： KIMURA TOSHINORI , KOYAMA KENICHI , KOGA HIROMI , SAWADA ATSUSHI
IPC分类号： H01H33/66
摘要： PROBLEM TO BE SOLVED: To economically manufacture a vane-shaped electrode of a vacuum circuit breaker and reduce variations in cutoff performance. SOLUTION: A vane-shaped electrode 4 is provided with vane parts 10 formed by a plurality of grooves 9 forged out of a material of high conductivity and spirally directed from its middle part toward its outer circumferential parts. The vane-shaped electrode 4 is further equipped with an auxiliary electrode 12 provided, on its peripheral part, with a projecting part 13 projecting from the middle part and a main contact part 11 joined to the projecting part 13 of the auxiliary electrode 12.

102. 发明专利

JP2000115925A SWITCHGEAR 失效
公开(公告)号：JP2000115925A
公开(公告)日：2000-04-21
申请号：JP27911198
申请日：1998-09-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： MARUYAMA TOSHIMASA , OKUNO MITSUHARU , SATO TOSHIBUMI , MIYAMOTO SEIICHI , ITOTANI TAKAYUKI , YANO TOMOTAKA , KOBAYASHI MINORU , KOYAMA KENICHI
IPC分类号： H02B13/02
摘要： PROBLEM TO BE SOLVED: To provide a small-sized switchgear of high safety. SOLUTION: A circuit for one phase consists of a disconnector 23 a breaker 24 and a ground switch 25. Three pairs of the circuits are connected with bus side conductors 22a, 22b, 22c in vacuum vessels 20a, 20b, 20c. As a result, miniaturization can be realized, and short-circuit between phases is not generated in the vacuum vessels 20a, 20b, 20c so that a switchgear of high safety can be realized.

103. 发明专利

JPH11265644A SWITCHING DEVICE 失效
公开(公告)号：JPH11265644A
公开(公告)日：1999-09-28
申请号：JP6545098
申请日：1998-03-16
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOYAMA KENICHI , KISHIDA YUKIMORI , SASAO HIROYUKI , KIMURA TOSHINORI , TAKAHASHI TOMOE
IPC分类号： H01H33/59 , H01H9/54 , H03K17/725
摘要： PROBLEM TO BE SOLVED: To provide a switching device using a semiconductor switch with small capacity without reducing the time responsiveness performance of input and cutoff by reducing the withstand current capacity of the semiconductor switch. SOLUTION: This device is formed of a thyristor 1A, a resistor 10 connected in series to the thyristor 1A, and a mechanical switch 2A connected in parallel to the serial circuit. The mechanical switch 2A is openable at high speed by an electromagnetic repelling mechanism. The current-limiting element is a reactor or the resistor 10, and it is a nonlinear current-limiting element having a nonlinear resistance value to passing current value. The semiconductor switch is formed of a pair of reversely juxtaposed thyristors 1A.

104. 发明专利

JPH11111123A AC SWITCHGEAR 失效
公开(公告)号：JPH11111123A
公开(公告)日：1999-04-23
申请号：JP27481997
申请日：1997-10-07
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOYAMA KENICHI , KISHIDA YUKIMORI , SASAO HIROYUKI , TAKAHASHI TOMOE
IPC分类号： H01H33/59
摘要： PROBLEM TO BE SOLVED: To provide an AC switchgear, capable of instantaneously breaking an alternating current at any time even when an alternating current is out of a zero-cross point by forcibly create a time when an alternating current flowing in a contact is zero, independently of the polarity of the alternating current flowing the contact. SOLUTION: An AC switchgear has a main contact (contact, mechanism) 2a freely approachable/separable to make/break an alternating current, a mechanism 2a to approach/separate the contact 2a, a control 5 to drive and control the mechanism 2a and high frequency current circuits 10, 20 connected in parallel to the contact 2a to superpose a high frequency current with a higher frequency than that of the alternating current on the alternating current when the control 5 drives the mechanism 2a to separate the contact 2a. When the alternating current is about zero with the high frequency current circuits 10, 20 superposing the high frequency current, the alternating current is shut off.

105. 发明专利

JPH05159710A NEGATIVE CHARGE GENERATION APPARATUS 失效
公开(公告)号：JPH05159710A
公开(公告)日：1993-06-25
申请号：JP9786092
申请日：1992-04-17
申请人： MITSUBISHI ELECTRIC CORP
发明人： TORIIE HIDEAKI , KOYAMA KENICHI
IPC分类号： H01J27/08 , H01J37/08 , H05H7/08
摘要： PURPOSE:To provide a simple and inexpensive negative charge generator which eliminates the necessity of using a negative-charge draw-out grid and a bias source, and enables generating a contraction arc with a small arc current and thus requires the use of no arc source of large capacity. CONSTITUTION:A negative charge generation apparatus is constructed such that an anode 16 and a cathode 14 oppose each other so that their opposing faces define an angle of 30 to 60 deg. while, on the other hand, a negative charge accumulator section 22 is provided in a direction substantially orthogonal to a center axis of the cathode 14 or the anode 16. Further, the cathode electrode 14 is formed into a needle or a bar whereas the anode electrode 16 is formed into a circular disc larger in outside diameter than the cathode 14.

106. 发明专利

JPH0567415A VACUUM CIRCUIT BREAKER 失效
公开(公告)号：JPH0567415A
公开(公告)日：1993-03-19
申请号：JP22907191
申请日：1991-09-09
申请人： MITSUBISHI ELECTRIC CORP
发明人： TORIIE HIDEAKI , KOYAMA KENICHI
IPC分类号： H01H33/66
摘要： PURPOSE:To enhance a breaking performance for a large current to obtain a small-sized vacuum circuit breaker. CONSTITUTION:Electrode rods 5a, 5b of a fixed side and a movable side respectively are introduced on an axis of a vacuum vessel 1 in such a manner as to keep airtightness and to be free in approaching/separating relatively. Electrodes 6a, 6b of the fixed side and the movable side respectively are each constituted of an arc running electrode 11 and a contact 12 and are arranged respectively at inner end parts of the paired electrode rods 5a, 5b. In the vacuum vessel 1 an arc shield 10 is arranged for encircling the pair of electrodes 6a, 6b. An arc transfer 14 is fixed to the arc shield 10 by means of a fitting metal fixture 15 formed of a material having heat conductivity smaller than the arc transfer 14 so as to encircle the pair of electrodes 6a, 6b inside the arc shield 10.

107. 发明专利

JPH04133651A ELECTROMAGNETIC ACCELERATOR 失效
公开(公告)号：JPH04133651A
公开(公告)日：1992-05-07
申请号：JP25257590
申请日：1990-09-20
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOYAMA KENICHI , TORIIE HIDEAKI
IPC分类号： H02K33/00
摘要： PURPOSE:To prevent decrease of dielectric strength and damage of an insulator by providing constitution such that at least a notch or hole is provided in a direction of flowing a current through an arc, generated between electrodes, in a flying vehicle rear part to confine the arc in these notch or hole. CONSTITUTION:A notch 2d is provided in a direction of current flowing through an arc, generated between electrodes 1a, 1b, in a flying vehicle 2, and both blades of the notch 24, that is, arc guides 2a, 2b are connected by a flying vehicle head part 2c. The arc 3, generated in a rear part of the flying vehicle 2, receives force in a direction of an arrow mark 8 by a magnetic field of the current, flowing in the rail-shaped electrodes 1a, 1b, to advance into the notch 2d of the flying vehicle 2. Thereafter, the arc 3 is left as advancing between the arc guides 2a, 2b to drive the flying vehicle 2 in the direction of the arrow mark. Here, the arc is advanced between the arc guides 2a, 2b of the flying vehicle 2 in its acceleration process, so that a part, faced to a bore of insulators 6a, 6b, is prevented from directly coming into contact with a high temperature part of the arc.

108. 发明专利

JPS647447A CURRENT LIMITING DEVICE 失效
公开(公告)号：JPS647447A
公开(公告)日：1989-01-11
申请号：JP16084287
申请日：1987-06-30
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOYAMA KENICHI , HAYASHI TATSUYA , SASAO HIROYUKI
IPC分类号： H01H87/00 , H01H37/76 , H02H9/02
摘要： PURPOSE:To suppress the generation of a surge voltage by applying a superconductive substance to the current-carrying part between the terminals at both sides, and then varying the cross-sectional area orthogonal to the direction the current flows as it goes forward in the direction the current flows, and at the same time cooling the current-carrying part to a temperature required for the superconductive substance in the current-carrying part to maintain its superconductive state. CONSTITUTION:The captioned device is constituted in such a manner that the current-carrying part 13 consisting of a superconductive substance is provided between the No.1 and No.2 terminals 1, 2 at both sides so as to be joined to these terminals 1, 2, and it is formed so that the cross-sectional area orthogonal to the current-carrying direction is varied, and at the same time, a prescribed cooling is performed by a cooling device 15. Thereby, the generation of a surge voltage, which is due to a sudden collapse in the superconductive state caused by overcurrent, can be suppressed, and at the same time, a current limiting device, which can be used a vast number of times and has a long life, can be obtained.

109. 发明专利

JPS63187525A ARC EXTINGUISHER 失效
公开(公告)号：JPS63187525A
公开(公告)日：1988-08-03
申请号：JP1807087
申请日：1987-01-28
申请人： MITSUBISHI ELECTRIC CORP
发明人： MORI SADAJIRO , KOYAMA KENICHI
IPC分类号： H01H73/18

110. 发明专利

JPS63181223A POWER SWITCH 失效
公开(公告)号：JPS63181223A
公开(公告)日：1988-07-26
申请号：JP1274387
申请日：1987-01-22
申请人： MITSUBISHI ELECTRIC CORP
发明人： KOYAMA KENICHI , MORI SADAJIRO
IPC分类号： H01H33/20 , H01H9/46

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