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1. 发明专利

JPH09219904A POWER CONVERTER FOR ELECTRIC MOTORCAR 失效
公开(公告)号：JPH09219904A
公开(公告)日：1997-08-19
申请号：JP2645296
申请日：1996-02-14
申请人： HITACHI LTD , HITACHI MITO ENG KK , HITACHI TECHNO ENG
发明人： SUZUKI ATSUSHI , KUWABARA HEIKICHI , TSUBOI TAKASHI , ITAHANA HIROSHI , KONDO HISASHI , SAITO HIDEJI , MIZUGUCHI NOBUAKI , MATSUURA MASAHIRO , FUJIEDA NOBUO , KATO CHIYUKI , IKEGAWA MASAHIRO , HATTORI MORISHIGE
IPC分类号： B61C17/00 , B60L9/16 , H02M1/00
摘要： PROBLEM TO BE SOLVED: To make a power converter a cooling mechanism where the freedom in arrangement of equipment can be raised, even if the density of mounting increase, by fitting out a heat receiving plate, where a switching element is attached and coolant is let pass inside, a heat exchanger for the coolant, a pump for circulating the coolant, a means for blowing cooling air to the heat exchanger, and others, under the floor of an electric motorcar. SOLUTION: Elements being the objects of cooling are attached to both sides of a heat receiving plate 10, and cooling water from a liquid circulation pump 11 is let flow into the heat receiving plate 10, and the cooling water which is heated, receiving the heat, is sent to a radiator, and the temperature of the cooling water is lowered by the cooling air from outside the car. On the other hand, the cooling air 30 being taken in from an air intake 24 opened at the top of a casing 2 to a ventilation port 25 through an air filter 20 installed at a skirt 4 and an air duct 21 is discharged from an air exhaust port 27 to a truck face through a radiator 12, a blower 29, and a cavity 26. This way, the cooling efficiency of the device can be improved, by taking in cooling air 30 from the topside and exhausting air to the bottom side thereby preventing the exhaust air heated by the heat generation of the device from being taken into the casing again.

2. 发明专利

JPH1011421A SIMULTANEOUS LINEAR EQUATION SOLUTION FOR PARALLEL ARITHMETIC PROCESSING 失效
公开(公告)号：JPH1011421A
公开(公告)日：1998-01-16
申请号：JP15950496
申请日：1996-06-20
申请人： HITACHI LTD
发明人： TAKAHASHI KATSUNORI , IKEGAWA MASAHIRO , KATO CHIYUKI , KAIHO MASAYUKI
IPC分类号： G06F9/38 , G06F17/12
摘要： PROBLEM TO BE SOLVED: To perform an analysis of a large scale in a short calculation time by calculating every area via each relevant processor based on the coefficient matrix concerning every area and the connection boundary information on divided areas and calculating a solution of an entire analysis area. SOLUTION: A solver part 5 inputs the coefficient matrices A14 to A16 and the right side vectors b17 to b19 which are produced from the areas 1 to 3 managed by processors 1 to 3 respectively in response to the area division. The part 5 also inputs the connection boundary information 13 on the areas 1 to 3 of processors 1 to 3 which are produced when an area is divided. Then the processors 1 to 3 solve the simultaneous linear equations of their areas 1 to 3 respectively and perform the communication 20 of data with other processor 1 to 3 having the nodes of a connection boundary 12 against the value concerning these nodes. Furthermore, the part 5 carries out the communication shared by all processors against the value which is necessary for convergence of the matrix calculation. In such a processing procedure, the processors 1 to 3 output the answers x22 to x24 of their relevant area 1 to 3 respectively.

3. 发明专利

JPH08216879A EQUIPMENT FOR ROLLING STOCK AND SUPER-EXPRESS RAILROAD VEHICLE 失效
公开(公告)号：JPH08216879A
公开(公告)日：1996-08-27
申请号：JP2369595
申请日：1995-02-13
申请人： HITACHI LTD
发明人： SUZUKI ATSUSHI , KATO CHIYUKI , KUWABARA HEIKICHI , IKEGAWA MASAHIRO , KONDO HISASHI
IPC分类号： B61C17/04 , B61D27/00
摘要： PURPOSE: To prevent a large quantity of water spraying out of a sprinkler or the like from being infiltrated into underflooring equipment, in this rolling stock that adopted a body mount system covering a electrical equipment group to be set up under the floor of a car body smoothly along the body form en bloc. CONSTITUTION: A louver 3 being composed of plural pieces of partition plates perpendicular to the ground as an air intake is set up in a body-mount system's housing 2 covering a controller group set up under the floor of a car body 1 smoothly along the body form in a lump, and an air filter 4 is set up in a partition plate 4 between the louver 3 and a fan chamber 7 at a position where it is not crossed with all straight lines passing through an opening part of the louver 3 from the outside of the body.

4. 发明专利

JPS6451577A ANALYZING METHOD FOR GRADUALLY CHANGING TRANSPORTATION /DIFFUSION FIELD 失效
公开(公告)号：JPS6451577A
公开(公告)日：1989-02-27
申请号：JP20812487
申请日：1987-08-24
申请人： HITACHI LTD
发明人： KATO CHIYUKI , IKEGAWA MASAHIRO
IPC分类号： G06F17/50 , G06F17/13 , G06F19/00
摘要： PURPOSE:To analyze a successively changing transportation/diffusion field by representing an analysis area as the aggregation of discrete points by a finite difference method or a finite volume method and obtaining the value of the quantity of a state after DELTAt time from a point going upstream by uDELTAt/2 (u is transportation vector) from the respective discrete points. CONSTITUTION:In the analysis of the unsteady temperature field of one of the transportation/diffusion fields, the analysis area is divided to proper grids intersecting orthogonally with each other. An area for storing the quantity phiof the status in the respective grid points (for instance, temperature), the quantity F of unbalance and flow velocities (u), (v), is maintained. The flow velocities ui,j, vi,j of the respective grid points are set. An initial temperature distribution Ti,j is set. The quantity of the unbalance of the quantity of the status is calculated and the temperature Ti,j of the respective grid points after DELTAt time from the calculated quantity of the unbalance is calculated. The numerical analysis of the unsteady temperature field can be attained by repeating such a calculation by the number of applied repetitions.

5. 发明专利

JPS6214682B2 失效
公开(公告)号：JPS6214682B2
公开(公告)日：1987-04-03
申请号：JP7426280
申请日：1980-06-04
申请人： HITACHI LTD
发明人： IKEGAWA MASAHIRO , TORII TAKUJI , KAWAMURA KEIZO
IPC分类号： F01D5/18

6. 发明专利

JPS56165703A TURBINE DYNAMIC BLADE 失效
公开(公告)号：JPS56165703A
公开(公告)日：1981-12-19
申请号：JP6782780
申请日：1980-05-23
申请人： HITACHI LTD
发明人： TORII TAKUJI , IKEGAWA MASAHIRO , KAWAMURA KEIZOU
IPC分类号： F01D5/18
摘要： PURPOSE:To prevent a cooling medium flowing path from rising the pressure in such a way of making film cooling on the blade by providing a steam separating part on the half way to the flowing path, and by making steam jetting holes on the cores, in a gas turbine blade in which a sinuate cooling path is installed. CONSTITUTION:A sinuate flowing path 4 is installed in a turbine dynamic blade 1, and a steam flowing path 6 is provided on its half way through a steam separating part 5. Steam jetting holes 7 are made on cores 2 corresponding to the flowig path 6. Cooling water is made to flow in through the root of the blade, evaporated by the heat from the cores 2 and the film 3, and part of the steam is jetted through the steam flowing path 6 via the steam jetting holes 7 to a high temperature main gas flowing path.

7. 发明专利

JPS54104531A ELECTRIC WINDING 失效
公开(公告)号：JPS54104531A
公开(公告)日：1979-08-16
申请号：JP1145778
申请日：1978-02-06
申请人： HITACHI LTD
发明人： OOGURO TAKAHIRO , NAKAYAMA HISASHI , IKEGAWA MASAHIRO , KAMIIDE YASUO
IPC分类号： H01F27/28
摘要： PURPOSE:To uniformly cool effectively electric windings by improving the cooling fluid flow in horizontal cooling passages among respective winding units and restricting the local temperature increase of the windings. CONSTITUTION:Controllers 15 for reducing the peripheral width of vertical cooling passages and being thinner than horizontal duct pieces are disposed at every twice the pitches of the pieces at the position corresponding to the end of the pieces 13 within at least one of the inside and outside vertical cooling passages 6, 7. Thus, it can effectively uniformly cool the respective horizontal cooling passages 5 formed by the cooling fluid flowing through the inside and outside cooling passages 6, 7 and flow controllers 15 in the winding units 1 disposed between the inside and the outside insulating columns 3 and 4.

8. 发明专利

JPS5484230A COOLING DEVICE OF RADIATOR 失效
公开(公告)号：JPS5484230A
公开(公告)日：1979-07-05
申请号：JP15052577
申请日：1977-12-16
申请人： HITACHI LTD
发明人： IKEGAWA MASAHIRO , OOGURO TAKAHIRO , NAKAYAMA HISASHI
IPC分类号： H01F27/08
摘要： PURPOSE:To secure wind amount which is effective in cooling, and intend to improve the radiation efficiency, by providing a device which has rectifying function for killing whirling stearm component of fan wind among the fan and the radiator. CONSTITUTION:A rectifying body 8 which has a horizontal direction rectifying plate for killing whirling stream component of fan wind among a fan 4 and a radiator 3. Wind from the fan 4 is streamed straight, as shown in arrow mark 9, and also, wind range in IV-IV section is shown as oblique lines 10 without deviated enlargement. From this, deviated enlargement of wind range can be eliminated, and drop of radiation efficiency accompanied by increase of leaked wind amount which has been existed in the former cooling method inevitablly can be prevented.

9. 发明专利

JPH06202750A NUMERICAL ANALYSIS METHOD 失效
公开(公告)号：JPH06202750A
公开(公告)日：1994-07-22
申请号：JP34794492
申请日：1992-12-28
申请人： HITACHI LTD
发明人： WATANABE MASATOSHI , IKEGAWA MASAHIRO
IPC分类号： G01M9/00 , G06D5/00 , G06F17/10 , G06F15/31
摘要： PURPOSE:To shorten calculation time and to reduce a storage capacity by dividing the whole of an area into areas and reducing the dimensions to analyze the areas in the case of areas which can be approximated to lower dimensions. CONSTITUTION:With respect to formation of a compression wave due to, for example, plunge of a vehicle into a tunnel, its propagation, and analysis of its discharge to a tunnel exit shell, an area 31 is an entrance area until the vehicle plunges into a tunnel, and an area 32 in an area around the vehicle. The compression wave is generated when the vehicle included in the area 32 plunges into the tunnel. The compression wave is generated three-dimensionally; and when the vehicle velocity is smaller than the acoustic velocity, the compression wave proceeds in the tunnel more quickly than the vehicle because the compression wave proceeds forward at the acoustic velocity. Since the compression wave proceeding in the tunnel can be approximated as a one-dimensional phenomenon, a tunnel area 33 can be subjected to one-dimensional analysis. As the result, the storage capacity is made smaller and the calculation time is reduced in comparison with those for three-dimensional analysis of all of areas.

10. 发明专利

JPH06195425A NUMERICAL ANALYSIS METHOD FOR FLUID 失效
公开(公告)号：JPH06195425A
公开(公告)日：1994-07-15
申请号：JP34390592
申请日：1992-12-24
申请人： HITACHI LTD
发明人： KATO CHIYUKI , IKEGAWA MASAHIRO
IPC分类号： G06F17/50 , G06F17/17 , G06F15/60 , G06F15/353
摘要： PURPOSE:To provide an accurate fluid analyzing method by providing a virtual flow passage which includes a virtual object such as a column and is attached a periodic condition at in/out-flow border and giving the outflow condition of the virtual flow passage as the inflow condition of an analytic flow passage. CONSTITUTION:An inflow turbulence intensity ko which is known by an experiment, etc., the shapes of the analytic flow-passage A and the virtual flow passage B (in which column is arranged) are set, the respective flow passages A and B are divided into differential meshes, a joint border C is set so as to set the outflow condition of the virtual flow passage B to be the inflow condition of the analytic flow passage A and the periodic condition is set at the in/out-flow border so as to grow turbulence in the virtual flow passage B. Then, a proper initial value to a parameter alpha is set so as to execute the flow calculation of the virtual flow passage B until convergence. Furthermore, when the value of the parameter alpha capable of realizing the necessary turbulence intensity ko is obtained, time (t) is set to be zero again so as to alternately execute the flow calculation of the virtual flow passage B and the analitic flow passage A until an objective time tend by a time step DELTAt.

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