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1. 发明专利

DE3046304A1 未知
公开(公告)号：DE3046304A1
公开(公告)日：1981-09-17
申请号：DE3046304
申请日：1980-12-09
申请人： HITACHI LTD
发明人： KANO TAKASHI
IPC分类号： H03K17/10 , H02H7/12 , H02M1/096 , H03K17/08 , H03K17/725 , H03K17/73 , H03K17/78
摘要： A high voltage converter apparatus having overvoltage protection circuits for thyristors is disclosed in which, in order to protect series-connected thyristors in the converter against overvoltage, the converter is stopped when the overvoltage is generated by a trouble in the primary circuit of a pulse transformer, which is included in a gate circuit for the thyristors, and one of the overvoltage protection circuits, each of which is connected between an anode and a gate of a corresponding thyristor, is prevented from being operated when the overvoltage is generated by a trouble in the secondary circuit of the pulse transformer.

2. 发明专利

CA1154087A HIGH VOLTAGE CONVERTER APPARATUS HAVING OVERVOLTAGE PROTECTION CIRCUITS FOR THYRISTORS 未知
公开(公告)号：CA1154087A
公开(公告)日：1983-09-20
申请号：CA366431
申请日：1980-12-09
申请人： HITACHI LTD
发明人： KANO TAKASHI
IPC分类号： H03K17/10 , H02H7/12 , H02M1/096 , H03K17/08 , H03K17/725 , H03K17/73 , H03K17/78 , H02M1/18 , H02H7/125
摘要： A high voltage converter apparatus having overvoltage protection circuits for thyristors is disclosed in which, in order to protect series-connected thyristors in the converter against overvoltage, the converter is stopped when the overvoltage is generated by a trouble in the primary circuit of a pulse transformer, which is included in a gate circuit for the thyristors, and one of the overvoltage protection circuits, each of which is connected between an anode and a gate of a corresponding thyristor, is prevented from being operated when the overvoltage is generated by a trouble in the secondary circuit of the pulse transformer.

3. 发明专利

JPH01148037A COOLING DEVICE FOR SOLAR BATTERY 失效
公开(公告)号：JPH01148037A
公开(公告)日：1989-06-09
申请号：JP30316487
申请日：1987-12-02
申请人： HITACHI LTD
发明人： EGUCHI YOSHIO , KANO TAKASHI
IPC分类号： H01L31/042 , H01L31/04 , H01L39/14 , H02J15/00
摘要： PURPOSE:To enhance efficiency, by using a part of the thermal source of a superconducting coil for cooling a solar battery. CONSTITUTION:An energy storing system is composed of a thermal source 1 for cooling a superconducting coil, a solar battery panel 3, a cooling pipe 2, a cooling fin 4, and a base 5. Then, out of the thermal source 1 for cooling the superconducting coil, a cooling medium is taken by the cooling pipe 2 and is transmitted to the back side surface of the solar battery 3. Accordingly, the cooling medium tranamitted from the thermal source 1 is circulated in the cooling fin 4 and is returned to the thermal source 1, and in the meantime, heat generated in the solar battery 3 is transmitted to the cooling fin 4, but the heat is absorbed by the cooling medium passing the internal section of the cooling fin 4, and so the solar battery 3 can te cooled.

4. 发明专利

JPS63207242A ROUTING CONTROL SYSTEM FOR PACKET SWITCHING NETWORK 失效
公开(公告)号：JPS63207242A
公开(公告)日：1988-08-26
申请号：JP4066787
申请日：1987-02-24
申请人： HITACHI LTD , HITACHI SEIBU SOFTWARE KK
发明人： SUZUKI MICHIO , KASHIO JIRO , KANO TAKASHI , TANAKA MASAHIKO
IPC分类号： H04L12/711 , H04L12/733 , H04L12/803
摘要： PURPOSE:To improve the stability for routing change by by-passing respective destination exchanges stepwise in accordance with states of queue length abnormality of lines with destination exchanges as units. CONSTITUTION:Queue lengths of lines l1 and l2 are counted; and if they are different from each other, destination packet exchange which divides traffic into two or more directions with respect to the same destination are ob tained and only lines whose queue lengths are shorter are defined as transmission directions. If exchanges are already by-passed to the line l1, having the longer queue length in case that lines l1 and l2 are different in queue length, one exchange is selected from them and by-pass of this exchange is immediately stopped. Thus, if an abnormality of queue length occurs, the number of releating hops to all destination exchanged in the pertinent direction is increased by one and the transmission direction is changed in accordance with this number of repeating hops.

5. 发明专利

JPS63178757A CONTROL DEVICE FOR GATE 失效
公开(公告)号：JPS63178757A
公开(公告)日：1988-07-22
申请号：JP600987
申请日：1987-01-16
申请人： HITACHI LTD
发明人： KASHIWAZAKI HIROSHI , KANO TAKASHI
IPC分类号： H02M1/088
摘要： PURPOSE:To secure the conduction of a thyristor arm, by outputting a reignition pulse after a set time from outputting a normal gate pulse. CONSTITUTION:A forward voltage, applied on (n) sets of thyristors S1-Sn, constituting the arm of a thyristor converter and connected in series, is detected by a detector FV whereby ignition is driven from a pulse amplifier PA through a pulse transformer PT. This control circuit is equipped with a controller CC and outputs an ON pulse P1 as well as an OFF pulse P2 to a flip-flop (FF) circuit. Further, the control circuit is equipped with an AND circuit AN, a differential circuit DF and a time delay circuit T1. According to this constitution, the output of the time delay circuit T1 is eliminated after a time T1 even when the output of the detector FV has been left in being outputted, therefore, the outputs of the AND circuits AN1, AN may be eliminated once. An output is generated in the differential circuit DF when the output is generated again after a time T2 whereby the thyristors S1-Sn are supplied with gate pulses.

6. 发明专利

JPS63155839A CONTROL SYSTEM FOR ROUTING INFORMATION OF PACKET SWITCHING NETWORK 失效
公开(公告)号：JPS63155839A
公开(公告)日：1988-06-29
申请号：JP30130186
申请日：1986-12-19
申请人： HITACHI LTD , HITACHI SEIBU SOFTWARE KK
发明人： KANO TAKASHI , SUZUKI MICHIO , KASHIO JIRO , TANAKA MASAHIKO
摘要： PURPOSE:To reduce the processing value of table distribution by extracting the changed parts of a routing table compared with the previously distributed one and informing these changed parts only to the switching stations and switching modules requiring the routing tables when these tables are distributed. CONSTITUTION:A packet switching network consists of a network control station 1, packet switching stations 2-5, and a trunk circuit which securs mutual connections among these stations. the station 1 has a function to produce the routing tables based on the state reports of stations 2-5 and to distribute them to each switching station in addition to a normal exchange function. When the routing tables are distributed to the stations 2-5 from the station 1, the changed parts of the table are extracted in comparison with the previously distributed one. These changed parts are information only to the switching stations that require the routing tables, thus. Thus it is possible to reduce the routing table value when these tables are distributed to the stations 2-5 from the station 1.

7. 发明专利

JPS6236474B2 失效
公开(公告)号：JPS6236474B2
公开(公告)日：1987-08-07
申请号：JP15955980
申请日：1980-11-14
申请人： HITACHI LTD
发明人： KAWAGUCHI YOSHINOBU , KANO TAKASHI
IPC分类号： G01R31/00 , H02M1/00 , H02M7/04

8. 发明专利

JPS62168267A CALCULATION SYSTEM FOR SHORTEST ROUTE 失效
公开(公告)号：JPS62168267A
公开(公告)日：1987-07-24
申请号：JP20652885
申请日：1985-09-20
申请人： HITACHI LTD , HITACHI SEIBU SOFTWARE KK
发明人： SUZUKI MICHIO , KANO TAKASHI , HOSHI TORU , KASHIO JIRO
IPC分类号： G06F17/10
摘要： PURPOSE:To improve the processing efficiency for calculation of the shortest route by treating adjacent matrices where the relation between adjacent nodes is shown by the elements of '1' and '0' by means of logical operation of bits. CONSTITUTION:In a network consisting of nodes A-F, each element of an adjacent matrix ¦A¦ containing an element of '0' or '1' showing an adjacent state between two nodes is set at a single bit. Then the rows of the ¦A¦ are stored in the memory areas (1)-(6) with the columns stored in the memory areas (7)-(12) respectively. While areas (13)-(24) are set for arrivable matrices ¦R1¦-¦Rn¦ expressed by ¦Rn¦=¦Rn-1¦*¦A¦. The calculation of the arrivable matrix R2 is calculated by performing an operation for an AND corresponding to the bits of the 1st row (13) of the arrivable matrix ¦R1¦ (=¦A¦) and the 1st col umn (7) of an adjacent matrix ¦A¦ and then setting the arithmetic result at '1' since the contents of said register are not equal to '0'. A distance matrix is calculated by an equation based on the arithmetic result of the arrivable matrix. Thus is it possible to calculate the shortest route with small memory capacity and high arithmetic efficiency.

9. 发明专利

JPS62115949A PACKET SWITCHING EQUIPMENT 失效
公开(公告)号：JPS62115949A
公开(公告)日：1987-05-27
申请号：JP25386985
申请日：1985-11-14
申请人： HITACHI LTD , HITACHI SEIBU SOFTWARE KK
发明人： SUZUKI MICHIO , KANO TAKASHI , HOSHI TORU , KASHIO JIRO
摘要： PURPOSE:To improve the processing ability by making a packet switching circuit into the self-rooting switching circuit composed of plural switching elements mutually connected to the line interface and executing the necessary switching control in accordance with the transfer packet from the line interface by the control part. CONSTITUTION:Line interfaces 4-6 provided corresponding to respective lines examine the classification of the received packet, discriminates the packet which may be conveyed to the address line as it does and the packet to need the processing by a control part 2, the former sticks the address of the conveying destination line interface, sends it to a self-rooting packet switching circuit 3 and the latter transfers it to the control part. The self-rooting packet switching circuit 3 sends the sent packet to the equivalent line interface in accordance with the address stuck to it. Thus, the burden of the control part is decreased, further, the problems of the competition and the congestion of the access to the common memory will not occur and the wide improvement of the processing ability of the packet switching equipment can be expected.

10. 发明专利

JPS61185071A SELF-EXCITED SWITCHING REGULATOR 失效
公开(公告)号：JPS61185071A
公开(公告)日：1986-08-18
申请号：JP2170285
申请日：1985-02-08
申请人： HITACHI LTD , HITACHI METALS LTD
发明人： ABE KIMIHITO , ONDA KENICHI , YABUNO KOHEI , KANO TAKASHI , NAKAJIMA SUSUMU
IPC分类号： H02M3/338
摘要： PURPOSE:To obtain a stable output by providing an ON period deciding circuit for deciding the ON period of a main switch element and an OFF period deciding circuit for deciding the OFF period at the primary side of a transformer independently, thereby compensating an input change. CONSTITUTION:The primary windings w1 of a transformer 6 and a main switch element 3 are connected in series with a DC power source 5. An OFF period deciding circuit 1 and an ON period deciding circuit 2 are independently provided at the primary side of the transformer 6. The circuit 1 decides the OFF period of a main switch element 3, and the circuit 3 decides the ON period. A starter 4 operates the element 3 when the power source 5 is the prescribed voltage or higher.

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