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1. 发明专利

JPH0670401A CONTROLLER FOR ELECTRIC RAILCAR 失效
公开(公告)号：JPH0670401A
公开(公告)日：1994-03-11
申请号：JP23429092
申请日：1992-08-10
申请人： HITACHI LTD , TOKAI RYOKAKU TETSUDO KK
发明人： KOTAKE KAZUYOSHI , IWATAKI MASAHITO , HASEGAWA SANKICHI , TSUBOI TAKASHI , KAWAZOE YUJI , UEDA CHIAKI , NOZAKI YOSHIO , ONOZAKI MASAAKI , SASAKI HIROMI , ISHIZU KAZUMASA , SHIBUYA SUSUMU
IPC分类号： B60L3/00
摘要： PURPOSE:To design insulations of controllers connected in series to the ground at a potential or less between positive and negative current collectors and to reduce a voltage unbalance between the controllers. CONSTITUTION:A midpoint of a plurality of controllers connected in series of an electric railcar is brought into a rail 17 through wheels 16 to be set to 0V. Controllers are respectively connected between a positive current collector and 0V and between a negative current collector and the 0V. Accordingly, since the midpoint of the plurality of controllers connected in series becomes the 0V, designing of insulations of the controllers to the ground can be conducted by a half of a potential between the positive current collector and the negative current collector. Since the voltage unbalance between the controllers also becomes 0V at the midpoint, it substantially becomes a half.

2. 发明专利

JPH05205583A VACUUM CIRCUIT-BREAKER 失效
公开(公告)号：JPH05205583A
公开(公告)日：1993-08-13
申请号：JP24947992
申请日：1992-09-18
申请人： HITACHI LTD
发明人： TSUNODA KOJI , HASEGAWA SANKICHI , UCHII TAROU
IPC分类号： H01H33/66
摘要： PURPOSE:To eliminate parts in the lower part of an electromagnetic repulsion coil and lower the height of a vacuum circuit-breaker to make the size compact by putting a pulling back spring of a short circuit ring in the upper part than the ring and concentrically with a power transmission rod. CONSTITUTION:When an electromagnetic repulsion coil 10 is excited, a short circuit ring 11 receives the repulsing force and rises by the size G while opposing a pulling back spring 12. While opposing the pulling back spring 15, the ring pushes up a rod 5E through a bolt 8 and moves a movable pole 5 to bring it in contact with a fixed pole 4. When the repulsing force of the coil 10 disappears, the rod 5E and the bolt 8 return to the original position owing to the pulling back springs 12, 15 and the poles 5, 4 are apart from each other. Since the spring 12 is put in the upper part than the ring 11 and concentrically with a nut 7B and the bolt 8, there is no part under the coil 10 and thus the height of a vacuum circuit-breaker can be lowered by that degree and the size can be compact.

3. 发明专利

JPH05153702A MAIN CIRCUIT BREAKER FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPH05153702A
公开(公告)日：1993-06-18
申请号：JP33583991
申请日：1991-11-27
申请人： HITACHI LTD
发明人： HASEGAWA SANKICHI
IPC分类号： B60L3/00 , B60L9/18 , B60L15/00 , H01H33/66
摘要： PURPOSE:To obtain a main circuit breaker which can be suitably employed in an electric vehicle for driving a single induction motor through a single inverter unit. CONSTITUTION:DC power is fed from a stringing through a current collector 1, a main circuit fuse 2, two line switches 3, a high speed circuit breaker 4, a filter reactor 5 and a filter capacitor 6 to a plurality of inverter units 8. Each inverter unit 8 is independently inserted with a main circuit breaker 7 which can be operated through an operating coil 13. The main circuit breaker 7 comprises a vacuum valve contact which is driven from closed state to open state or from open state to closed state through short time excitation of the operating coil 13, wherein the closed state and the open state can be held mechanically.

4. 发明专利

JPH03285515A PROTECTIVE SYSTEM FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPH03285515A
公开(公告)日：1991-12-16
申请号：JP8075890
申请日：1990-03-30
申请人： HITACHI LTD
发明人： AKIYAMA HIROYUKI , HASEGAWA SANKICHI , UCHII TAROU
IPC分类号： H02H7/00 , B60L3/00 , H02H7/12
摘要： PURPOSE:To detect abnormality in a CT by logically operating a relation between externally provided operating conditions and detection values of CT when the output of the CT exceeds a predetermined value in a high speed interruptor for isolating the power supply side from the control side. CONSTITUTION:A start command 23 provided from a main controller 15 to a controller 5 and a signal representing throw-in of a main circuit switch LB3 are inputted to an AND gate 11 to produce an AND signal 26. On the other hand, a current value detected through a CT 6 is compared with a threshold at a comparing section 7b, and a signal 27 is outputted if the threshold is larger and a logical product signal 28 of the signals 27, 28 is produced from an AND gate 12. Duration of the signal 28 is measured by means of a timer 13 and when it reaches a predetermined time, a fault signal 24 is outputted and transmitted to a monitor or an operating desk in the upstream so that a target relay 18 is operated to display an alarm. The LB 3 is interrupted by that signal. Consequently, under output due to fault of the CT 6 is detected and dangerous trouble is avoided.

5. 发明专利

JPH03269966A TERMINAL CONNECTION STRUCTURE OF HIGH-TENSION LARGE-CURRENT APPARATUS FOR VEHICLE 失效
公开(公告)号：JPH03269966A
公开(公告)日：1991-12-02
申请号：JP6711390
申请日：1990-03-19
申请人： HITACHI LTD
发明人： SHIMAZAKI FUMIAKI , HASEGAWA SANKICHI
IPC分类号： H01R13/15 , H01R13/18 , H01R13/64
摘要： PURPOSE:To absorb a center discrepancy error to the whole circumference of a cylindrical plug by placing an elastic body between a side plug of a box body positioned at the center of a ring contact and an insulating holder plate. CONSTITUTION:At a fixed insulating holder plate 7 at the box body side, the holder plate 7 is held by a plug 8 and a plug holder 9 with a bolt 10. On the other hand, in a wiring at the box body side, a bolt 11 is buried in the plug holder 9 and fitted in passive rotation preventive groove. At the border of the plug holder 9 and the holder plate, an elastic body 12 is placed. A ring contact 1 is composed of a spring contacted strongly to the contact maker and the plug 8. When a center slippage is generated, the elastic body 12 is bent, and an exact inlaying can be made. Consequently, insertion and extraction in one direction can be carried out.

6. 发明专利

JPH03251005A LINE BREAKER FOR VEHICLE 失效
公开(公告)号：JPH03251005A
公开(公告)日：1991-11-08
申请号：JP4541890
申请日：1990-02-28
申请人： HITACHI LTD
发明人： HASEGAWA SANKICHI
IPC分类号： H01H33/66 , B60L15/00
摘要： PURPOSE:To prevent fault current from spreading by containing a line breaker for interrupting main circuit DC current of an electric vehicle and a high speed vacuum circuit breaker in separate boxes. CONSTITUTION:Main circuit DC current is taken in from a stringing 1 through a current collector 2 and fed through line breakers 3a, 3b, contained in a double insulation line breaker box 14, into a circuit breaker box 15a secure directly to the body 8 by means of fixing metals 16. The DC current is fed through a DC high speed vacuum circuit breaker 15, contained in the circuit breaker box 15a, and a filter reactor 5 to an inverter 6 where it is inverted into VVVF three-phase current for driving an induction motor 7. The current then flows through the body 8 and wheels 9 into a rail 10 and fed back to a substation (now shown). Consequently, no arc is produced even upon interruption of main circuit current and fault current is prevented from spreading.

7. 发明专利

JPH0359920A DIRECT CURRENT HIGH SPEED VACUUM CIRCUIT BREAKER DEVICE 失效
公开(公告)号：JPH0359920A
公开(公告)日：1991-03-14
申请号：JP19415589
申请日：1989-07-28
申请人： HITACHI LTD
发明人： SHIMAZAKI FUMIAKI , HASEGAWA SANKICHI
IPC分类号： H01H33/66 , H01H33/59
摘要： PURPOSE:To obtain a compact, large-capacity direct current vacuum circuit breaker which can be installed under the floor of an electric car by connecting a parallel magnetic field coil in series with the repulsive coil of a commutating switch to a vacuum valve. CONSTITUTION:The excessive current of a main circuit current IL8 is detected by a CT9 and the result is processed by a command portion, so that with a little delay to a trip command commutating commands are transmitted to both a repulsive coil 2 for a vacuum valve and a repulsive coil 7 for a commutating switch. Then a vacuum valve 1 is opened while a commutating switch 6 is closed. Closing of the commutating switch 6 causes a commutating current to flow reversely of the main circuit. In this case, the repulsive coil 7 for the commutating switch and the coil 4 for parallel magnetic fields are connected in series to a commutating command power source 5 whereby the breaking ability of the circuit breaker within the vacuum valve 1 is enhanced. Since the circuit breaker is thus usable with the exciting current of the repulsive coil of the commutating switch, it is compacted.

8. 发明专利

JPH01128328A PHOTOINTERRUPTER TYPE INTERLOCKING CONTACT MAKER 失效
公开(公告)号：JPH01128328A
公开(公告)日：1989-05-22
申请号：JP28334487
申请日：1987-11-11
申请人： HITACHI LTD
发明人： HASEGAWA SANKICHI
IPC分类号： H01H35/00
摘要： PURPOSE:To aim at the promotion of high reliability in an interlocking contact maker using a transmission type photointerrupter by installing at least more than one spot of nonshielding parts in a shielding plate traveling in a shielding direction. CONSTITUTION:When voltage is given to each of terminals (1), (2) of a light emitting element 1, infrared rays 2 are emitted, and a light receiving element 3 operates, whereby voltage is generated in terminals (3), (4). At this time, if a shielding plate 5 is advanced in an X direction, each voltage of these terminals (3), (4) is sharply decreased. In this case, a nonshielding part 5b and a shielding part 5c at a tip of its original shielding part 5a are installed in the shielding plate 5. Voltage in the terminals (3), (4) in this state passes through 55c once turned to OFF from an operating state 55d and 55b once turned to ON, and finally it comes to a state of 55a once turned to OFF. According to this constitution, trouble in a photointerrupter itself, especially, addition of a diagnostic function against a 'on' closed-circuit failure, reciprocation, or an operating holdup in an object itself doing its rotary motion are all detectable so that the promotion of high reliability in a device can be achieved.

9. 发明专利

JPS6353658B2 失效
公开(公告)号：JPS6353658B2
公开(公告)日：1988-10-25
申请号：JP14693380
申请日：1980-10-22
申请人： HITACHI LTD
发明人： HASEGAWA SANKICHI , YAMADA YUKIO , ISHIKAWA MITSUO , USUI YOSHINORI
IPC分类号： H01H33/18 , H01H9/34 , H01H33/08

10. 发明专利

JPS62241213A AIR BLAST BREAKER 失效
公开(公告)号：JPS62241213A
公开(公告)日：1987-10-21
申请号：JP8212486
申请日：1986-04-11
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： UCHII TAROU , HASEGAWA SANKICHI , MASUMI HIROSHI
IPC分类号： H01H3/46 , H01H33/65

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