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1. 发明专利

JPS5523447A DETECTION CIRCUIT FOR COMMUTATION FAILURE OF CHOPPER 失效
公开(公告)号：JPS5523447A
公开(公告)日：1980-02-19
申请号：JP9617978
申请日：1978-08-09
申请人： HITACHI LTD
发明人： SATOU HIROSHI , KIWAKI HISAKATSU , ISOBE EISUKE , KOBAYASHI TEIJI
IPC分类号： G01R31/00 , H02M3/135
摘要： PURPOSE:To make it possible to detect definitely the commutation failute of a chopper by providing a voltage detector in parallel to the chopper and then by detecting variation in voltage across the chopper disappearing. CONSTITUTION:The series circuit of resistor 18 and rectifier 19 with a gap is provided across chopper 6 and a current through rectifier 19 is converted by resistance 20 into a voltage, which is applied to commutation failure detection circuit 21. In series to main thyristor 11 of chopper 6, saturable reactor 13 is connected, voltages across saturable reactor 13 and across chopper 6 in turning ON and OFF the main thyristor are detected by the occurrence of the variation in current flowing through rectifier 19, so that the commutation failure of the chopper can definitely be detected.

2. 发明专利

JPS5353749A TRANSFORMER PROTECTIVE DEVICE 失效
公开(公告)号：JPS5353749A
公开(公告)日：1978-05-16
申请号：JP12835476
申请日：1976-10-27
申请人： HITACHI LTD
发明人： KOBAYASHI TEIJI , YAMADA YUKIO , ODASAWA NOBUAKI
IPC分类号： H02H7/04 , H02H3/08
摘要： PURPOSE:To enable identification of excitation rush current and overcurrent by connecting diodes with overcurrent relay coils in parallel and connecting these two in series to butt the diodes and connect to the output circuit of a current transformer.

3. 发明专利

JPS5619306A CONTROLLER FOR ELECTRIC ROLLING STOCK 失效
公开(公告)号：JPS5619306A
公开(公告)日：1981-02-24
申请号：JP9151079
申请日：1979-07-20
申请人： HITACHI LTD
发明人： KOBAYASHI TEIJI , KIKUCHI KIYOSHI
IPC分类号： B60L3/00 , B60L15/38 , H02M1/08 , H02P7/28 , H02P7/29
摘要： PURPOSE:To prevent overvoltage and power consumption generated until a main circuit is interrupted by a mechanism wherein pattern voltage is clamped when alternating current voltage for controlling a gate drops. CONSTITUTION:A pattern generating portion PD generates pattern voltage VP corresponding to notch instructions, and supplies it to an operational amplifier OP. A transistor Tr is connected to an output circuit of the pattern generating portion through a resistor R. A main circuit current converting portion FD converts output from a main circuit current detecting portion DCCT into feedback signals VF, and feeds them to the operational amplifier. Output from the operational amplifier OP is supplied to a main thyristor MTh and a gate pulse generating portion GP through a phase-shifting controlling portion PS, and controls the main thyristor by output pulses VG. When alternating current voltage drops, a voltage detector VD functions, the transistor Tr is at ON, and pattern voltage is clamped at a fixed value. Thus, the width of the pulses VG is narrowed, and power consumption until a main circuit is interrupted can be suppressed.

4. 发明专利

JPS54132914A TROUBLE DETECTOR FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPS54132914A
公开(公告)日：1979-10-16
申请号：JP4034478
申请日：1978-04-07
申请人： JAPAN NATIONAL RAILWAY , HITACHI LTD
发明人： HORIIE YUUJI , KOBAYASHI TEIJI
IPC分类号： B60L3/00 , B60L15/24
摘要： PURPOSE:To prevent the overcurrent due to the jump-over of a notch, by detecting the jump-over and breaking a circuit. CONSTITUTION:If a notch N2 is jumped over, a notch jump-over detection contact 17 is closed. Since, there is no proceeding instruction or intermediate feed instruction at that time, a proceeding breaker 14 remains de-energized. Therefore, a notch jump-over circuit is closed and an output 200 is transmitted to break a circuit to protect it.

5. 发明专利

JPS5495407A PROTECTOR FOR ELECTRIC VEHICLE 失效
公开(公告)号：JPS5495407A
公开(公告)日：1979-07-27
申请号：JP15778
申请日：1978-01-06
申请人： HITACHI LTD
发明人： ISOBE EISUKE , KOBAYASHI TEIJI
IPC分类号： B60L3/04
摘要： PURPOSE:To prevent the degree of defectiveness of an appliance or circuit from increasing, by hindering the restoring operation of a protective detector by a resetting unit and opening the defective appliance or circuit depending on the number of times of repetition of the restoring operation. CONSTITUTION:The protective detector consists of a high-speed circuit breaker HB, an overcurrent relay OCR1 for a first group and an overcurrent relay OCR2 for a second group. When the high-speed circuit breaker operates, the restoring operation by a reset switch RS can be performed once. When the relays OCR1, OCR2 operate, the restoring operation can be performed up to two times. Main motor breakers COS11-COS22 and the relays are operated when the restoring operation is performed three or more times. A memory CD is provided so that it operates in response to the AND of the operation of the protective detector with a resetting operation. When the number of repetition of the restoring operation reaches a predetermined value, the motor breakers and the relays are caused to operate in connection with the resetting operation.

6. 发明专利

JPS52121721A BRAKE CONTROL DEVICE 失效
公开(公告)号：JPS52121721A
公开(公告)日：1977-10-13
申请号：JP3823576
申请日：1976-04-07
申请人： HITACHI LTD
发明人： KOBAYASHI TEIJI , ISAKA MASAYOSHI
IPC分类号： H02P3/12 , B60L7/04
摘要： PURPOSE:To control rising of brake current smoothly and quickly controlling chipper by energizing to constant current control system changing over on current detector output pattern for brake current control unitl rising brake current to fixed vlaue and pattern correspond to brake output order from driver's seat after rising brake current to fixed value.

7. 发明专利

JPS5290020A GENERATING BRAKE CONTROL DEVICE FOR ELECTRIC TRAIN 失效
公开(公告)号：JPS5290020A
公开(公告)日：1977-07-28
申请号：JP593176
申请日：1976-01-23
申请人： HITACHI LTD
发明人： ISAKA MASAYOSHI , KOBAYASHI TEIJI
IPC分类号： H02P3/12 , B60L7/02 , B60L7/04
摘要： PURPOSE:To obtain a circuit capable of making a smooth control for brake current by a chopper and extending the control range of a generating brake when electric train speed in starting the generating brake is low.

8. 发明专利

JPS5845665B2 失效
公开(公告)号：JPS5845665B2
公开(公告)日：1983-10-12
申请号：JP9617978
申请日：1978-08-09
申请人： HITACHI LTD
发明人： SATO HIROSHI , KIWAKI HISAKATSU , ISOBE EISUKE , KOBAYASHI TEIJI
IPC分类号： G01R31/00 , H02M3/135

9. 发明专利

JPS5463213A SERIES PARALLEL CONTROL CIRCUIT OF DC MOTORS 失效
公开(公告)号：JPS5463213A
公开(公告)日：1979-05-22
申请号：JP11595578
申请日：1978-09-22
申请人： HITACHI LTD
发明人： ARAI SHINICHI , YAMADA YUKIO , KOBAYASHI TEIJI
IPC分类号： B60L15/22 , B60L15/32 , H02P5/68
摘要： PURPOSE:To protect a diode by flowing a failure current through a change over circuit when a failure is generated in one motor at other motor opening time by providing a change over switch on a diode for a traversing use be used at series parallel connection time of motors. CONSTITUTION:In case when DC motors M1, M2 are connected in series, switches 1, 4 are opened and a switch 2 is also opened. And in case when motors are to be connected in parallel switches 1, 3, 4 are thrown in and a switch 2 is opened. At this time for example after a motor M1 is opened by throwing in switches COS1, COS2 to under side contacts of the drawing groundings etc. are caused in a motor M2 and a failure current flows, then a change over switch S of a diode Dd for a traversing use is thrown in to the upper side contact and makes a failure current not to flow through the diode.

10. 发明专利

JPS5421522A POWER CONVERSION SYSTEM 失效
公开(公告)号：JPS5421522A
公开(公告)日：1979-02-17
申请号：JP8601377
申请日：1977-07-20
申请人： HITACHI LTD
发明人： KIWAKI HISAKATSU , KIMURA AKIRA , KOBAYASHI TEIJI
IPC分类号： H02M3/135 , H02M7/04 , H02M7/155
摘要： PURPOSE:To remove the phenomenon of beating by such an arrangement that while a power source for obtaining DC is normal a power conversion system, which uses the DC as its power supply, is operated in synchronism to the frequency of the original power source.

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