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1. 发明专利

JP2002186180A METHOD AND APPARATUS FOR VOLTAGE COMPENSATION IN DIRECT-CURRENT POWER SUPPLY 失效
公开(公告)号：JP2002186180A
公开(公告)日：2002-06-28
申请号：JP2000380014
申请日：2000-12-14
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KITAMI HIDEYOSHI , SATO OSAMU , OBARA TOSHIYUKI , KUSAYAMA YOSHIO
IPC分类号： H02J1/00
摘要： PROBLEM TO BE SOLVED: To solve the problem that, if a direct-current motor for auxiliary equipment in a direct-current power supply unit is started at a plant failure, a terminal voltage of a control device is reduced beyond an allowable range by a starting current at that time. SOLUTION: Direct-current power is supplied from an alternating-current power supply 1 to the control device 6 via a charger 3 and a storage battery 4. A bypass contactor 5b opens when the control device terminal voltage is above an allowable upper limit voltage, and closes when the control device terminal voltage is below the allowable lower limit voltage, and inserts or bypasses a silicon dropper 5a to regulate the voltage. When a motor operation command is given to a motor control circuit 7a at the plant failure, a contactor 6a, together with a synchronous contactor 5g, is closed. As a result, the bypass contactor 5b is closed by MC 5f and the silicon dropper 5a is bypassed. Thus a transient and excessive voltage drop due to the starting current is avoided.

2. 发明专利

JPH09189289A STARTING SYSTEM OF WATER FEED PUMP 失效
公开(公告)号：JPH09189289A
公开(公告)日：1997-07-22
申请号：JP1496
申请日：1996-01-04
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： KUWANA MAMORU , SATO OSAMU , NAGUMO TOMIO , KUSAKA SATOSHI
IPC分类号： F01D15/08 , F04B49/00
摘要： PROBLEM TO BE SOLVED: To use an outlet regulating valve in common without arranging a piping which is arranged in the downstream of each check valve and a water feed stopping valve by arranging the outlet regulating valve between a water feed pump outlet header which is common to a turbine driving water feed pump and a motor driving water feed pump, and a high pressure water feed heater. SOLUTION: An outlet regulating valve 5 is arranged between a water feed pump outlet header which is common to a turbine driving water feed pump 7 and a motor driving water feed pump 2 and a high pressure water feed heater 6. The valve 5 is used in such a way that one is closed and the other one is opening exchanged by respective outlet valves 4, 9 of the pumps 2, 7, and thereby, the valve 5 is used in common without arranging a piping which is arranged in the rear of each check valve 3, 8 and a water feed stopping valve. It is thus possible to obtain good effect economically.

3. 发明专利

JPH10191561A START CONTROLLER 失效
公开(公告)号：JPH10191561A
公开(公告)日：1998-07-21
申请号：JP34304896
申请日：1996-12-24
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAKAGI NOBORU , OKAMOTO SHUJI , SATO OSAMU
IPC分类号： H02J1/00 , H02P1/54
摘要： PROBLEM TO BE SOLVED: To lock the start adequately in response to a permitted voltage value for each induction motor and a circuit voltage value during the start of the induction motor by locking the closing of a power source switch if the circuit voltage value is lower than the permissible start value of the induction motor. SOLUTION: A permissible start voltage of each induction motor calculated in advance by the impedance or the like of a transformer is set to an induction motor permissible start voltage data file 13 by data input key board 15. And if there is a closing command for a certain induction motor power source switch 4, a circuit voltage value at that time and permissible start voltage value of that induction motor are compared to each other by a computing element 16; if the circuit voltage value is lower, then an excessive voltage drop due to start current is prevented by locking the start permit signal 18. By doing this, the start of induction motor can be adequately operated and controlled for each induction motor by removing previous extreme restriction on the start.

4. 发明专利

JPH09209709A TURBINE PROTECTIVE DEVICE 失效
公开(公告)号：JPH09209709A
公开(公告)日：1997-08-12
申请号：JP3563596
申请日：1996-01-30
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO OSAMU , WATANABE YOSHIE , IKEDA HIROSHI
IPC分类号： F01D17/24 , F01D21/00 , F01D21/16 , F01K7/24
摘要： PROBLEM TO BE SOLVED: To prevent an unnecessary turbine trip from occurring by bringing the setting of the opening of a low pressure turbine bypass valve as near the tolerance close of a high pressure turbine as possible and also reducing the possibility of unnecessary operation as small as possible. SOLUTION: In a thermal power generating equipment provided with a high pressure turbine bypass valve and a low pressure turbine bypass valve, a calculation means 29 is provided in which the allowable opening of the low pressure turbine bypass valve is set as a function of a turbine output which is determined by the tolerance dose of a high pressure turbine, the actual output 27 of the turbine and the actual opening 28 of the low pressure turbine bypass valve are input, and the actual opening and allowable opening of the low pressure turbine bypass valve are compared from each other. When the actual opening of the low pressure turbine bypass valve exceeds the allowable opening while the high pressure turbine bypass valve is fully closed 22, the low pressure turbine bypass valve is suddenly closed forcibly so as to trip the turbine.

5. 发明专利

JPH1061408A OPERATION METHOD OF TURBINE IN INDIVIDUAL OPERATION 失效
公开(公告)号：JPH1061408A
公开(公告)日：1998-03-03
申请号：JP23987996
申请日：1996-08-22
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO OSAMU , IKEDA HIROSHI , KANEDA HIDEAKI , KONDO SATOSHI
IPC分类号： F01D17/24 , F01K7/22 , F01K7/24
摘要： PROBLEM TO BE SOLVED: To suppress excessive reduction of frequency (number of revolution) generated at the time of individual operation and make the individual operation in a system a success. SOLUTION: In repeat cycle thermal power generation facility which consists of a high pressure turbine having a high pressure turbine bypass line and a low pressure turbine bypass line, and an intermediate and low pressure turbine at the time of individual operation when a power system linked with this power generation facility is shut off and load of a generator is reduced, reheat steam pressure 14 is set temporarily in such a manner that it is kept at pressure 14 before the generation of individual operation by an analog switch 20 which is operated by an individual operation generation signal 39 in a system. A deviation between actual repeat steam pressure 16 and it is obtained based on the set pressure, proportional integration operation 18 is done to adjust a degree of opening of a low pressure turbine bypass valve 8, and output of the intermediate and low pressure turbine is controlled in such a manner that it is higher than output at the time of normal high and intermediate pressure operation.

6. 发明专利

JPH06276662A BACK-UP PROTECTIVE RELAY DEVICE FOR GENERATOR 失效
公开(公告)号：JPH06276662A
公开(公告)日：1994-09-30
申请号：JP5540593
申请日：1993-03-16
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： SATO OSAMU , YOSHIZAKI KYOICHI
IPC分类号： H02H3/40 , H02J3/38
摘要： PURPOSE:To make it possible to set a distance relay coordinated with a protective equipment on the power transmission line side by changing the value of an input voltage of the distance relay by using a resistor depending on the operating conditions of other generators. CONSTITUTION:If a plurality of generators T, 8 and 9 are connected to a power transmission bus 3, a current 12 decreases so that an impedance 2 seen from the distance relay 10 becomes larger than the line impedance up to the actual short-circuit point. At this time, among the inputs of short-circuit back-up protection distance relay 10, the voltage of the distance relay 10 is reduced by resistors 25 to 27 having respectively different resistance values switched by auxiliary contacts 19 to 20 of the generators 7, 8 and 9 in an input circuit of voltage (PT secondary voltage) as generator information, by which the value of generator voltage V seen from the distance relay is virtually made smaller in response to the change in T1, and the result V/11 is made constant. In this way, by making constant the impedance seen from the distance relay 10, the protection range can be made constant regardless of the number of operating units of generators.

7. 发明专利

JPH09280007A TURBINE PROTECTION DEVICE 失效
公开(公告)号：JPH09280007A
公开(公告)日：1997-10-28
申请号：JP9079896
申请日：1996-04-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： OKAYASU YOSHIHEI , SATO OSAMU , IKEDA HIROSHI
IPC分类号： F01D21/16
摘要： PROBLEM TO BE SOLVED: To minify possibility of unnecessary operation to the utmost so as to prevent unnecessary turbine trip from generating by transmitting a signal from a computer, exciting the quick closing solenoid valve of a low pressure bypass valve, and forcedly quickly closing the low pressure turbine so as to perform turbine trip. SOLUTION: For preventing an injury of a high pressure turbine due to what is called erroneous opening that a low pressure turbine bypass valve is opened during full closing 22 of a high pressure turbine bypass valve, output of a turbine and low pressure turbine bypass flow are inputted. When the low pressure turbine bypass flow is over the setting conformed to the bearing quantity of a high pressure turbine even in transition, a signal indicating erroneous opening of the low pressure turbine bypass valve is output from a computer 29. By the signal 25 from the computer 29, the low pressure turbine bypass valve is forcedly quickly closed so as to perform turbine trip. Hereby unnecessary trip of the turbine due to unnecessary operation of a protection device can be avoided to the utmost, by setting a function to be a very close value to a bearing quantity curve.

8. 发明专利

JP2001325912A ELECTRON BEAM INSPECTION DEVICE 失效
公开(公告)号：JP2001325912A
公开(公告)日：2001-11-22
申请号：JP2000148574
申请日：2000-05-16
申请人： HITACHI LTD
发明人： SATO OSAMU , KITSUNAI HIROYUKI , SHIMIZU MINORU
IPC分类号： G01B15/00 , G01B15/04 , G01N23/20 , G01N23/225 , H01J37/16 , H01J37/20
摘要： PROBLEM TO BE SOLVED: To prevent contamination of samples in a simple structure without deterioration of resolution in an electron beam inspection device. SOLUTION: The electron beam inspection device irradiates electron beam from an electron gun in an electron gun chamber onto samples placed in a sample room and detects secondary electron and reflected electron generated from the samples. With this kind of the electron beam inspection device, a means for generating active species of hydrogen is provided in the sample room, where hydrocarbon system gas remaining in the sample room is dissolved into carbon dioxide (CO2) and water (H2O) through oxidization by activated species of oxygen, to eliminate hydrocarbon system gas from inside the sample room, thus, contamination of the samples can be cut off.

9. 发明专利

JP2001217304A SUBSTRATE STAGE, SUBSTRATE PROCESSING APPARATUS AND METHOD USING THE SUBSTRATE STAGE 失效
公开(公告)号：JP2001217304A
公开(公告)日：2001-08-10
申请号：JP2000027360
申请日：2000-01-31
申请人： HITACHI LTD
发明人： KITSUNAI HIROYUKI , SATO OSAMU
IPC分类号： H01L21/302 , C23C14/54 , H01L21/203 , H01L21/3065 , H01L21/68 , H01L21/683
摘要： PROBLEM TO BE SOLVED: To provide a substrate stage capable of very accurately controlling the temperature distribution of a substrate in processing, a substrate processing device which processes the substrate while controlling its temperature distribution by the above substrate state, and a substrate processing method. SOLUTION: The parts of a glass substrate stage 4 which are brought into contact with a substrate 1 are formed of conductors 2 and 2', power supplies 5 and 5' which apply voltages to the conductors 2 and 2' are provided. Furthermore, gas piping having a temperature controlling function and introducing thermally conductive gas to the rear of the substrate is provided inside the board stage 4. The substrate 1 is efficiently controlled in temperature when it is being processed, so that the substrate can be very uniformly processed through its surface.

10. 发明专利

JP2001075815A METHODS FOR GENERATING AND LOADING SOURCE BUILT-IN TYPE EXECUTABLE PROGRAM AND COMPUTER-READABLE RECORDING MEDIUM WITH SOURCE BUILT-IN TYPE EXECUTABLE PROGRAM GENERATION PROGRAM RECORDED THEREON 失效
公开(公告)号：JP2001075815A
公开(公告)日：2001-03-23
申请号：JP25119399
申请日：1999-09-06
申请人： HITACHI LTD
发明人： SAWARA HIROSHI , KAWAI MASAO , SATO OSAMU , TAKEDA KOICHI , NAKAJIMA HIROTO , YOSHIKAWA SATOSHI
IPC分类号： G06F9/06 , G06F9/45 , G06F21/22
摘要： PROBLEM TO BE SOLVED: To clarify the correspondence among a load module, source data needed to produce it and data such as project information and to manage the load module, the source data and the data such as project information. SOLUTION: A compiler 50 compiles source data 100 and generates and stores an object module, a compressing part 60 compresses the data 100 and project information 200 (compiler option, linker option and information necessary to load production such as load name to be generated) and acquires and stores a compressed source 150 and compressed project information 250, and a linker 58 links the object module, generates a load module 350, also unites the module 350, the source 150 and the information 250 into one and generates a source built-in type executable program 320. A header label 500 that is referred to when included load, source and project information are later extracted is attached to the program 320.

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