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1. 发明专利

JPH1197617A SEMICONDUCTOR MODULE 失效
公开(公告)号：JPH1197617A
公开(公告)日：1999-04-09
申请号：JP25468697
申请日：1997-09-19
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： NAKATSU KINYA , SUZUKI NOBUNAGA , HIRAGA MASAHIRO , BABA SHIGEYUKI , ITO KAZUHIRO , BENTANI HIROYUKI , SANO MASAHIRO , TOMITA HIROYUKI , ISHIDA SEIJI , YONEMOTO SHINJI , WATANABE HIROSHI
IPC分类号： H01L25/07 , H01L25/18 , H05K3/28 , H05K3/30
摘要： PROBLEM TO BE SOLVED: To prevent the attachment of a module-encapsulating resin to an electrolytic capacitor and prevent the electrolytic capacity from falling in by providing a spacer securing a distance between a wiring board and a lower part of the electrolytic capacitor which is not smaller than the resin, and covering the lower part of the capacitor to a sufficient height. SOLUTION: A resin board 19, on which a gel-like resin 14 filled to close an aperture of a power module, an element control semiconductor element 10 in a resin 9, a transformer for generating power therefor, and an electrolytic capacitor 11 for rectifying and smoothing the secondary side of the transformer are mounted, is electrically connected with an electrode and is electrically connected with a semiconductor element on a metal board 3. Then, a spacer 16 having a wall for covering the lateral side of the electrolytic capacitor 11 is provided between the electrolytic capacitor 11 mounted on the resin board 19 and the resin board 19, thus preventing the resin 9 from attaching to a lower part of the electrolytic capacitor 11. The shape of the spacer 16 may be a rectangular or others in shape, as long as the lower part of the electrolytic capacitor 11 can be housed within the spacer 16.

2. 发明专利

JPH06311760A INVERTER 失效
公开(公告)号：JPH06311760A
公开(公告)日：1994-11-04
申请号：JP8876093
申请日：1993-04-15
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： TOKASHIKI MUTSUO , IBORI SATOSHI , YAMAMOTO TOSHIHIKO , BABA SHIGEYUKI , TAKADA NAOKI , ITO KAZUHIRO , HIRAGA MASAHIRO , HIROTA MASAYUKI
IPC分类号： H01R9/22 , H01R12/71 , H02M7/48 , H05K1/14 , H01R23/68
摘要： PURPOSE:To provide many functions with a few types of inverters instead of providing a large variety of inverters and reduce the cost. CONSTITUTION:A space in which additional circuit boards are installed is provided inside a main part cover 2. Maximum two optional circuit boards 10A can be installed in the space with connectors 81, 82 and 1023. With this constitution, by preparing various types of optional circuit boards, the necessary optional circuit boards can be selected in accordance with required functions and installed, so that inverters having arbitrary functions can be obtained without changing the main parts of the inverters and, as a large variety of inverters are not necessary, the cost increase can be avoided.

3. 发明专利

JPH0830321A CONTROL PANEL WITH HELP FUNCTION 失效
公开(公告)号：JPH0830321A
公开(公告)日：1996-02-02
申请号：JP16825194
申请日：1994-07-20
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： IBORI SATOSHI , TOKASHIKI MUTSUO , BABA SHIGEYUKI , TAKADA NAOKI , ITO KAZUHIRO , SHIMOZU TADAO , HIROTA MASAYUKI
IPC分类号： G05B23/02
摘要： PURPOSE:To provide a control panel for equipment such as an inverter, with which explanation information required for operations can be sufficiently provided, to be sufficiently miniaturized while improving convenience. CONSTITUTION:When operation conditions or the like are displayed on a display screen 3 by an operation button 4 of a control panel 1, corresponding to this display, an indication expressing any prescribed page in a manual is simultaneously displayed at a line F of this display screen 3. When a selection setting operation is performed by the operating button 4 of the control panel 1, corresponding to the operation conditions set by this operation, the number of a page describing information such as the meaning of that setting or the method effective for the operation in the manual is automatically displayed on the line F of the display screen 3 so that the manual can be easily and simply referred to and effectively utilized as well. As a result, even a biginner can always perform the exact operation in a short time, and the convenience of the inverter can be sufficiently improved.

4. 发明专利

JPH09182477A MOTOR CONTROLLER 失效
公开(公告)号：JPH09182477A
公开(公告)日：1997-07-11
申请号：JP33509195
申请日：1995-12-22
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： TAKASE MASATO , ONO SHIGEO , BABA SHIGEYUKI , OHASHI TAKANORI
IPC分类号： H02P29/00 , H02P5/00
摘要： PROBLEM TO BE SOLVED: To provide a motor controller whose control changeover can be performed stably while the continuity of a speed is being kept even when the motor is being turned. SOLUTION: By a control changeover switch 5, a control operation by a speed command signal N*a to be input from the outside is changed over to a control operation by a speed command signal N*b to be input to a high-order control system inside a system. At this time, a control-system changeover circuit 11 which computes a correction value Pr on the basis of the rotational speed of a motor 3 just before the point of time of its changeover is installed, and the correction value Pr is given as the initial value of a position command counter 12. Thereby, there is no fear that the rotational speed of the motor 3 is changed at the changeover.

5. 发明专利

JPH06303779A INVERTER DEVICE 失效
公开(公告)号：JPH06303779A
公开(公告)日：1994-10-28
申请号：JP8747093
申请日：1993-04-14
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： YAMAMOTO TOSHIHIKO , IBORI SATOSHI , TOKASHIKI MUTSUO , SATO SUSUMU , BABA SHIGEYUKI , ITO KAZUHIRO , IGARASHI SADAYUKI , HIRAGA MASAHIRO
IPC分类号： H01R9/22 , H02M7/48
摘要： PURPOSE:To flexibly cope with the change in the connection format and rated voltage of an external electrical path without requiring a great modification in a device body and to reduce cost by using a terminal block with a different connection format at the inverter device and external electrical path sides of the terminal block. CONSTITUTION:A terminal block 140 which is in an electrical wire press- clamping format 142 at one X side and in a crimp style terminal format 141 at the other Y side is used for the connection part at a conductor bar side and that at an external electrical path side in an inverter device in a unit wall- mounted structure, thus coping with any electrical wire connection format, improving universality, and reducing cost.

6. 发明专利

JPH0654552A PROTECTIVE CIRCUIT OF ELECTROSTATIC INDUCTION TYPE SELF ARC-EXTINGUISHING ELEMENT 失效
公开(公告)号：JPH0654552A
公开(公告)日：1994-02-25
申请号：JP19807192
申请日：1992-07-24
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： BABA SHIGEYUKI , IHORI SATOSHI , KANBARA KOJI , NAKAMURA ATSUHIKO , HIROTA MASAYUKI
IPC分类号： H02H7/122 , H02M1/32 , H02M7/48 , H02M7/537
摘要： PURPOSE:To prevent a voltage accompanied by a high surge voltage from being applied an IGBT(insulating gate bipolar transistor) by forming a structure so as not to break an output due to an overcurrent protective circuit during the operation of a gate voltage control circuit. CONSTITUTION:When an abnormal current so that a collector voltage exceeds a reference value flows in any IGBTs, the corresponding photo coupler turns to an ON-state by a detecting signal of a gate voltage control circuit 5 of each switching device. Thus, a signal S2 turns to a low level, and a signal S1 turns to a low level L after the dead time of a delay circuit 4. Thus, since the signal S1 is a high level H, a signal S5 is firstly the high level H, and when the signal S1 turns to the low level L, the signal S5 turns to the low level, and an output of a driving signal transmission circuit 8 is broken. Since the dead time by the delay circuit 4 is set long that the abnormal current is fully attenuated, the output breaking signal S5 is forbidden and a reflux current is rapidly broken during the operation of the gate voltage control circuit 5.

7. 发明专利

JP2000014169A INVERTER 失效
公开(公告)号：JP2000014169A
公开(公告)日：2000-01-14
申请号：JP17998898
申请日：1998-06-26
申请人： HITACHI LTD
发明人： SANO MASAHIRO , SUZUKI NOBUNAGA , BABA SHIGEYUKI , NAKATSU KINYA
IPC分类号： H05K7/20 , H02M1/00 , H02M7/48
摘要： PROBLEM TO BE SOLVED: To control the generation of heat which reverse flows into an outer case via a cooling fin by providing a heat insulating wall, which also operates as a heat insulating layer for insulating heat from the heat radiating fin against the inside of outer case. SOLUTION: Heat transferred to a cooling fin 8 from the lower surface of a power module 2 is radiated mainly at the heat radiating surface to the atmosphere through natural convection or forcible convection of cooling fin. Meanwhile, a part of heat transferred to the radiating fin 8 raises the temperature of air in the side of heat insulating wall 22, and the air in the heat insulating layer 23 freely moves through the upper and lower openings of an outer case 21. The air heated by the heat radiating fin 8 always absorbs external from the opening of the outer case 21 by the natural convection to become to exhaust air. The temperature of the heat insulating wall 22 in contact with the heat insulating layer 23 rises only up to the temperature of the heat insulating layer 23, so that the temperature rise of the outer case 21 for accommodating electrolytic capacitors 4, 10, control printed circuit board 26, power circuit printed circuit board 27 and signal wiring 29 or the like or restrained.

8. 发明专利

JPH0217868A CIRCUIT FOR DISCRIMINATING ABNORMALITY OF INVERTER 失效
公开(公告)号：JPH0217868A
公开(公告)日：1990-01-22
申请号：JP16670288
申请日：1988-07-06
申请人： HITACHI LTD
发明人： BABA SHIGEYUKI , IBORI SATOSHI , SHIMOZU TADAO
IPC分类号： H02M7/48 , H02P27/06
摘要： PURPOSE:To eliminate an erroneous operation by identifying, judging and displaying a malfunction state with malfunction detection signals fed from malfunction detection circuit to a microcomputer and a discrimination program according to an operating state. CONSTITUTION:A power conversion device has a power converter 1 for converting 3-phase AC into a DC, a power inverter 2 for converting a smoothed DC into an AC having desired voltage and frequency, a smoothing capacitor 3, and a 3-phase induction motor 4. An AC overcurrent detector 5 for outputting an overcurrent detection signal SG2 to a microcomputer 7 at the time of an overcurrent, a base driver 6 for a main switching element, the microcomputer 7, a current detector 8, a DC overcurrent detector 9, a DC overvoltage detector 10, a frequency setter 11, various malfunction state indicator 12 are provided. Thus, the state at the malfunction time can be discriminated with information of the operating state immediately before the malfunction time and various detection signals S1-S3.

9. 发明专利

JPH02155477A PROTECTIVE DEVICE FOR POWER CONVERTER 失效
公开(公告)号：JPH02155477A
公开(公告)日：1990-06-14
申请号：JP30048088
申请日：1988-11-30
申请人： HITACHI LTD
发明人： IBORI SATOSHI , BABA SHIGEYUKI , FUJII HIROSHI , KANBARA KOJI
IPC分类号： H02H7/122 , H02M7/48
摘要： PURPOSE:To increase the resistance value of a resistor for current limit charging, and to improve a current limiting effect while avoiding wasteful power consumption at the time of operation by installing an electromagnetic contactor in parallel with the resistor for current limit charging and providing a means controlling the opening and closing of the electromagnetic contactor. CONSTITUTION:An electromagnetic contactor 6 is mounted in parallel with a resistor 5 for current limit charging, and the opening and closing of the electromagnetic contactor 6 are controlled by a control circuit 9. The control circuit 9 transmits a control signal over the electromagnetic contactor 6 so that the electromagnetic contactor 6 is brought to an open state until the terminal voltage of a smoothing capacitor 3 reaches fixed voltage and the electromagnetic contactor 6 is closed when the terminal voltage reaches fixed voltage. Consequently, since currents are made to flow through the smoothing capacitor 3 through the resistor 5 for current limit charging when a power supply is connected or when the power supply is turned ON, excess inrush currents are not made to flow through the smoothing capacitor 3. Accordingly, an expensive circuit element such as a switching element is not broken.

10. 发明专利

JPH027714A PROTECTION DEVICE FOR COMPONENT WHEN FAULT CURRENT FLOWS 失效
公开(公告)号：JPH027714A
公开(公告)日：1990-01-11
申请号：JP15676588
申请日：1988-06-27
申请人： HITACHI LTD
发明人： IBORI SATOSHI , BABA SHIGEYUKI , FUJII HIROSHI , KANBARA KOJI , NANTO KENJI , OKAJIMA IKUO
IPC分类号： H03K17/08 , H03K17/0812
摘要： PURPOSE:To improve the reliability of a component even at the time of flowing a faulty current such as short-circuiting a load by providing a circuit clamping a gate-emitter of the component in a way that the gate-emitter voltage does not exceed the absolute maximum rating of the component. CONSTITUTION:Constant voltage diodes ZD1, ZD2 are provided between the gate and emitter of an electrostatic induction type self extinction component 1 and a gate-emitter voltage VGE at fault current is clamped to the Zener voltage. The Zener voltage of the diode ZD1 is selected over the absolute maximum rating of the gate-emitter voltage of the component 1. Moreover, since the diode ZD2 is connected in series, it is required to select the Zener voltage of the diode ZD1 lower by the forward voltage drop of the diode ZD2. Thus, the gate-emitter voltage of the electrostatic induction type self extinction component is clamped to the specified voltage at fault current such short-circuit of load and the positive feedback effect of the component is prevented thereby suppressing the increase of current at the time of short-circuiting and improving the reliability of the component.

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