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1. 发明专利

JPH0833336A POWER CONVERTER 失效
公开(公告)号：JPH0833336A
公开(公告)日：1996-02-02
申请号：JP16769694
申请日：1994-07-20
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： ANDO TAKESHI , HORIE SATORU , SAITO HIDEJI , TAKAKU TOSHIHIKO , TAKASAKI TOSHIO
IPC分类号： H02M7/219 , B60L9/24 , B60L15/00 , H02M7/00 , H02M7/04 , H02M7/12 , H02M7/48
摘要： PURPOSE:To reduce the size of cooler while sharing the unit by arranging one phase of a converter for converting AC power into DC power and one phase of an inverter for converting DC power into AC power on a same cooler. CONSTITUTION:Main circuit units 9a-9c, 10 are constituted such that four phases are arranged on one cooler and three phases 7a-7c among four phases of a PWM converter are combined with PWM inverters 7e-7g. The one remaining phase 7d of the PWM converter is combined with an overvoltage protective circuit 8 to obtain a main circuit unit 10. Consequently, the power converter can be shared and the capacity of a cooler required for the power converter of a PWM converter/inverter electric vehicle can be reduced.

2. 发明专利

JPH0746849A INVERTER 失效
公开(公告)号：JPH0746849A
公开(公告)日：1995-02-14
申请号：JP26837991
申请日：1991-09-19
申请人： HITACHI LTD , HITACHI TECHNO ENG , HITACHI MITO ENG KK
发明人： MATSUI TAKAYUKI , HORIE SATORU , SAITO HIDEJI , TOYODA EIICHI , SAKATA KAZUHIRO , ANDO TAKESHI , TSUBOI TAKASHI , KAWAKAMI TETSUYA , TAKAKU TOSHIHIKO
IPC分类号： H02M7/497 , H02M7/515 , H02M7/5387 , H03K17/04 , H03K17/10 , H03K17/12 , H03K17/56 , H02M7/48
摘要： PURPOSE:To make uniform the loss of switching elements by employing semiconductor devices having low forward voltage drop for the second and third switching elements and semiconductor elements having high switching rate for the first and fourth switching elements. CONSTITUTION:When a series multiplex inverter 1 is subjected to V/f control, the interval where the output voltage goes zero in proportion to the output frequency decreases thus increasing the average current of outside switching elements in proportion to the output frequency although the average current of inside switching elements is substantially constant. In this regard, switching elements having low forward voltage drop are employed for the inside switching elements S2, S3 constituting each phase whereas switching elements having short turn OFF time are employed for the outside switching elements S1, S4. Consequently, the loss due to forward voltage drop of the inside switching element decreases more than the increase of loss due to forward voltage drop of the outside switching element. This constitution prevents increase of loss even it the switching frequency is increased.

3. 发明专利

JPH0637198A SEMICONDUCTOR STACK 失效
公开(公告)号：JPH0637198A
公开(公告)日：1994-02-10
申请号：JP18787992
申请日：1992-07-15
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： TAKAKU TOSHIHIKO , SAITO HIDEJI
IPC分类号： H01L23/04
摘要： PURPOSE:To reduce the weight of a semiconductor stack by interposing coned disc springs between connecting bodies sandwiched between stacked bodies of semiconductor stacks and fixing the connecting plates held between the coned disc springs to a mounting frame. CONSTITUTION:A coned disc spring 8 is provided in the counterbored part of a supporting body 1 and an insulator 4 is provided by pressing the insulator 4 with a spring seat 10. Then an insulator 4, spring seat 20, coned disc spring 19, connecting plate 13, coned disc spring 19, spring seat 20, and insulator 4 are put between stacked bodies each of which is composed of a cooling fin 5, semiconductor device 6, cooling fin 5, and connecting conductor 7. A ball seat 3, ball 2, and supporting body 19 are arranged at the end section and, while they are pressed in the direction directed by the arrow, stack bolts 11 are tightened with nuts 11. Then the plate 13 is fitted to a fitting 14 with bolts 15 and the fitting 14 is fixed to a mounting frame 18 with bolts 16. Therefore, an unbalanced load caused by the flexure of the semiconductor stack can be absorbed by the coned disc springs 19 on both sides of the plate 13 and the weight of the stack can be reduced.

4. 发明专利

JPH08251940A SERIES MULTIPLEX POWER CONVERTER 失效
公开(公告)号：JPH08251940A
公开(公告)日：1996-09-27
申请号：JP4809195
申请日：1995-03-08
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： ANDO TAKESHI , HORIE SATORU , SAITO HIDEJI , TAKASAKI TOSHIO , TSUBOI TAKASHI , TAKAKU TOSHIHIKO
IPC分类号： H02M7/483 , H02M7/5387 , H03K17/12 , H02M7/48
摘要： PURPOSE: To eliminate breakdown when switching elements are connected in parallel by arranging switching elements connected in series and arranging clamp diodes on the opposite sides thereof. CONSTITUTION: Switching element modules 11a-14a, 11b-14b are arranged in the center and clamp diodes 15a, 15b, 16a, 16b, connected in parallel, are arranged symmetrically on the opposite sides of the switching element modules 11a-14a, 11b-14b. Consequently, the switching element modules 11a-14a, 11b-14b can be arranged proximately and the wiring connecting the switching element and a gate drive therefor can be shortened. Since the inductance of wiring connecting the switching element and the gate drive, as well as the inductance among the switching element modules 11a-14a, 11b-14b is reduced, oscillatory current is reduced between the switching elements which are thereby protected against breakdown.

5. 发明专利

JPH0583976A ALTERNATING CURRENT MOTOR CONTROLLER AND ELECTRIC ROLLING STOCK CONTROLLER WITH THIS 失效
公开(公告)号：JPH0583976A
公开(公告)日：1993-04-02
申请号：JP23779691
申请日：1991-09-18
申请人： HITACHI LTD , HITACHI TECHNO ENG , HITACHI MITO ENG KK
发明人： MATSUI TAKAYUKI , HORIE SATORU , SAITO HIDEJI , TOYODA EIICHI , SAKATA KAZUHIRO , ANDO TAKESHI , TSUBOI TAKASHI , KAWAKAMI TETSUYA , TAKAKU TOSHIHIKO
IPC分类号： H02P21/00 , B60L9/16 , B60L9/22 , B60L15/02 , H02P21/08 , H02P27/04 , H02P27/06 , H02P27/08
摘要： PURPOSE:To perform stable torque control in the whole operation region by providing a means for controlling the primary current vector of a motor and a means for controlling the slip frequency of the motor, and performing torque control by a vector control system in a low-speed operation region and by a slip frequency control system in the high-speed operation region. CONSTITUTION:A PWM inverter 1 converts DC voltage into 3-phase AC voltage and supplies it to an induction motor 2 to run an electric rolling stock. Forward/ backward command signals and power running/braking command signals outputted from a main controller 7 are put into a control command generator 6. The control command generator 6 generates an exciting current command signal and a torque current command signal for the induction motor 2 on the basis of a filter capacitor voltage signal, a primary angular frequency command signal, the power running/braking command signals and the forward/backward command signals, and transmits them to a voltage command calculator 5, a current controller 8, and a slip angular frequency calculator 19. And the PWM inverter 1 is controlled by both slip frequency control and vector control.

6. 发明专利

JPH04206563A SEMICONDUCTOR STACK 失效
公开(公告)号：JPH04206563A
公开(公告)日：1992-07-28
申请号：JP32893090
申请日：1990-11-30
申请人： HITACHI LTD , HITACHI MITO ENG KK
发明人： TAKAKU TOSHIHIKO , ITAHANA HIROSHI , TSUNODA KOJI , SAITO HIDEJI
IPC分类号： H01L25/11
摘要： PURPOSE:To use components such as spring washers and the like in common and to dispense with a support so as to enable a semiconductor stack to be miniaturized and lightweight by a method wherein unit laminates sandwiching a thin plate between them are compressed, and the thin plate is fixed to a rigid body through the intermediary of a dimension adjusting mechanism. CONSTITUTION:Spring washers 8 are arranged in a support 1, an insulating seat 4 which insulates a support 10 that supports a spring from fins 5 is provided, a semiconductor element 6, the cooling fins 5, a connector 7, and a thin plate 13 are provided, the spring washers 8 are arranged at the end of a support 9, the spring washers 8 are pressed by supports 3, a stud bolt 11 is fastened by a nut 12, the thin plate 13 is fixed both to a mounting plate 14 by a bolt 15 and to a rigid body 17 by a bolt 16. The laminate concerned is controlled in mounting position by the bolts 14 and 15, and the positional deviation of the laminate in an axial direction caused by thermal expansion can be absorbed by the thin plates 13. By this setup, a laminate long in an axial direction in which it is compressed can be pressed to uniformly give pressure to the contact surface of semiconductors and mounted on a rigid body.

7. 发明专利

JPH06163770A COOLING DEVICE OF INVERTER APPARATUS FOR ELECTRIC TRAIN 失效
公开(公告)号：JPH06163770A
公开(公告)日：1994-06-10
申请号：JP31523092
申请日：1992-11-25
申请人： HITACHI LTD
发明人： SAITO HIDEJI , TSUBOI TAKASHI , HORIE SATORU , ANDO TAKESHI , TOYODA EIICHI , MATSUI TAKAYUKI , TAKAKU TOSHIHIKO , NAKAMURA KIYOSHI , NAKADA KIYOSHI , KUWABARA HEIKICHI , ISAKA KOICHI
IPC分类号： H01L23/427 , H05K7/20
摘要： PURPOSE:To achieve miniaturization of a device including a cooler system as a whole by a method wherein a semiconductor switching element for a main circuit is mounted on one face of a heat-receiving plate and a heat pipe is buried into the other face. CONSTITUTION:Heat-receiving plates 31, 32 are attached so as to constitute one part of the outer wall of an enclosure 6 which houses constituent components for an inverter apparatus for an electric train. Semiconductor switching modules SM1 to SM4 are mounted on faces, one one side, of the heat-receiving plates 31, 32, the straight part, one one side, of a heat pipe 51 which has been bent to be L-shaped is buried into faces on the other side, and a radiating fin 52 is attached to the straight part, on the other side, of the heat pipe 51. Thereby, a cooling device is constituted. Since the semiconductor switching modules SM1 to SM4 are not turned on at the same time, the amount of heat entering the heat-receiving plates 31, 32 is made uniform. Thereby, coolers 53, 54 can be made small-sized. Especially when they are mounted on the lower part of the floor of an electric train, their cooling efficiency can be increased when the heat-receiving plates 31, 32 are attached so as to constitute one part of the vertical outer wall face, along the traveling direction of the electric train, of the enclosure 6.

8. 发明专利

JPH06225548A INVERTER DEVICE FOR ELECTRIC ROLLING STOCK 失效
公开(公告)号：JPH06225548A
公开(公告)日：1994-08-12
申请号：JP24478493
申请日：1993-09-30
申请人： HITACHI LTD
发明人： SAITO HIDEJI , TSUBOI TAKASHI , HORIE SATORU , ANDO TAKESHI , TOYODA EIICHI , MATSUI TAKAYUKI , TAKAKU TOSHIHIKO , NAKAMURA KIYOSHI , NAKADA KIYOSHI
IPC分类号： B60L9/18 , H01L23/427 , H02M1/00 , H02M7/483 , H02M7/515 , H02M7/5387
摘要： PURPOSE:To reduce the electromagnetic noise of a motor and downsize an inverter device for an electric rolling stock. CONSTITUTION:Each phase of inverter main circuit is constituted by connecting semiconductor modules SM1-SM4 in series to a DC power source, and connecting the junction between switch modules SM1 and SM2 and the junction between switch modules SM3 and SM4 to the neutral point of a DC power source through clamp diodes, respectively, and using the junction between the switch modules SM2 and SM3 as AC output. The loss of the switch modules SM1 and SM2 is at its peak when a load motor is on-load, and the loss of the switch modules SM2 and SM3 is at its peak when the load motor is at braking. So, the quantities of thermal load of coolers are averaged by attaching the pair of SM1 and SM2 and the pair of SM3 and SM4 whose peaks are slipped each to the same heat receiving plates 31 and 32, respectively, thus the coolers 53 and 54 are downsized.

9. 发明专利

JPH06163769A COOLING DEVICE OF POWER CONVERTER 失效
公开(公告)号：JPH06163769A
公开(公告)日：1994-06-10
申请号：JP31522992
申请日：1992-11-25
申请人： HITACHI LTD
发明人： SAITO HIDEJI , TSUBOI TAKASHI , HORIE SATORU , ANDO TAKESHI , TOYODA EIICHI , MATSUI TAKAYUKI , TAKAKU TOSHIHIKO , NAKAMURA KIYOSHI , NAKADA KIYOSHI , KUWABARA HEIKICHI , ISAKA KOICHI
IPC分类号： H01L23/427
摘要： PURPOSE:To achieve that a device including a cooler system is made small-sized as a whole. CONSTITUTION:Heat-receiving plates 31, 32 are supported by an enclosure which houses constituent components for a power converter, semiconductor switching modules SM1 to SM4 are mounted on faces, on one side, of the heat- receiving plates 31, 32, the straight part, on one side, of a heat pipe 51 is buried into faces on the other side, the stright part on the other side of the heat pipe 51 is pulled out to the outside of the enclosure, and a heat-radiating fin 52 is attached to the straight part. Thereby, a cooling device is constituted. Since the semiconductor switching modules SM1 to SM4 are not turned on at the same time, the amount of heat entering the heat-receiving plates 31, 32 is made uniform. Thereby, coolers 53, 54 are made small-sized.

10. 发明专利

JPH118982A INVERTER DEVICE 失效
公开(公告)号：JPH118982A
公开(公告)日：1999-01-12
申请号：JP14275398
申请日：1998-05-25
申请人： HITACHI LTD
发明人： SAITO HIDEJI , TSUBOI TAKASHI , HORIE SATORU , ANDO TAKESHI , TOYODA EIICHI , MATSUI TAKAYUKI , TAKAKU TOSHIHIKO , NAKAMURA KIYOSHI , NAKADA KIYOSHI , TSUTSUI YOSHIO
IPC分类号： H05K7/20 , H02M1/00 , H02M7/48 , H02M7/483
摘要： PROBLEM TO BE SOLVED: To ensure size reduction in the overall inverter device and ease of maintenance by reducing the size of a cooler and so the like. SOLUTION: A set of positive arm elements SM1 , SM2 and negative arm elements SM3 , SM4 of a semiconductor switch module SM is fitted on at least the same heat-receiving plates 31, 32 in consideration of inverter operating characteristics, thermal loads of the incoming radiation plates 31, 32 are averaged to reduce the size of cookers 53, 54. The power module of inverter main circuits is formed phase by phase. At the time of maintenance, a necessary power module is removed from a housing for maintainability, thereby ensuring ease of maintenance.

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