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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

JP2001314090A INVERTER DEVICE 失效
公开(公告)号：JP2001314090A
公开(公告)日：2001-11-09
申请号：JP2000132843
申请日：2000-04-27
申请人： HITACHI LTD , HITACHI KEIYO ENG & SYS LTD
发明人： SAKAI KEIJIRO , OKUYAMA TOSHIAKI , NAKATSU KINYA , ISHIDA SEIJI , FUJII HIROSHI , KATO JUNJI , HIRAGA MASAHIRO
IPC分类号： H02M7/48 , H02P27/06 , H02P27/08 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To accurately perform current limiting in the case of the automatic torque boost control and overload of an AC electric motor by an AC phase current obtained from the DC input current of an inverter. SOLUTION: This inverter device is provided with a first sample-and-hold circuit for sampling and holding the DC input current in a gate state for turning on only one phase and turning off the other two phases out of the three phases of the positive side arm switching element or the negative side arm switching element of a three-phase inverter, and a second sample-and-hold circuit for sampling/holding the DC input current in a gate state for turning on the second phase and turning off the other phase, thus varying the output frequency or output voltage of the inverter according to the first and second sample-and-hold circuit output value that changes with 120-degree phase period of the inverter output voltage phase.

3. 发明专利

JP2000306619A CONTROL TERMINAL BLOCK 失效
公开(公告)号：JP2000306619A
公开(公告)日：2000-11-02
申请号：JP11180999
申请日：1999-04-20
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： ITO KAZUHIRO , HIRAGA MASAHIRO , NAKAMURA ATSUHIKO
IPC分类号： H01R4/30 , H01R9/00
摘要： PROBLEM TO BE SOLVED: To reduce a mounting space on a board by placing a control terminal table on a control circuit board, providing a terminal having a wire connecting form of both of pressure fastening structure and screw fastening structure, and selecting and connecting any terminal portion corresponding to a connecting wire. SOLUTION: Therminal screw portions 1 employing a screw fastening structure and screw pressure fastening structures 3 are placed on a body mold portion 2 having wiring portions 4. A positional relation between the terminal screw portions 1 and the screw pressure fastening structures 3 is not fixed and may be arbitrarily selected. For example, the screw pressure fastening structures 3 and the terminal screw portions 1 may be arranged every other portion, or they may be grouped and the screw pressure fastening structures 3 may be placed on the right side and the terminal screw portions 1 may be placed on the left side. By using this control terminal block having the pressure fastening structures and the screw fastening structures in common, a mounting space can be reduced, a user or a maker can easily a terminal structure for each application of a signal, and further an effect such as cost reduction can be achieved.

4. 发明专利

JPH1141943A INVERTER CONTROLLER 失效
公开(公告)号：JPH1141943A
公开(公告)日：1999-02-12
申请号：JP18946097
申请日：1997-07-15
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： ENDO TSUNEHIRO , NAKATSU KINYA , FUJII HIROSHI , SUZUKI NOBUNAGA , HIRAGA MASAHIRO
IPC分类号： H01L21/822 , H01L27/04 , H02M7/00 , H02M7/12 , H02M7/21 , H02M7/48 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To provide an inverter having increased degrees of freedom for installation, specification easily changed without changing the basic section of the inverter and an easy separation between the basic section of inverter, and an I/O block section. SOLUTION: An inverter equipment is constituted with two or more separable blocks. One is constituted with a power module ISPM as an inverter basic section COR, comprising a DC/AC converter and controller containing a microcomputer for performing the control of this converter. The other is used as an I/O block section 7.8, equipped with an input/output interface section containing signal connection terminals, and the inverter basic section can be connected to a plurality of I/O block section.

5. 发明专利

JP2003224982A PULSE WIDTH MODULATION METHOD, POWER CONVERTER, AND INVERTER 审中-公开
公开(公告)号：JP2003224982A
公开(公告)日：2003-08-08
申请号：JP2002020883
申请日：2002-01-30
申请人： HITACHI LTD , HITACHI KEIYO ENG & SYS LTD
发明人： FURUKAWA TEIICHI , HIRAGA MASAHIRO , TOMITA HIROYUKI , ISHIDA SEIJI , OKUYAMA TOSHIAKI
IPC分类号： H02M7/48
摘要： PROBLEM TO BE SOLVED: To provide a pulse width modulation method and a power converter which can suppress an increase in magnetic noise and further, secure a sampling time long enough to detect a current. SOLUTION: A pulse width modulation method of a power converter, which subjects an output voltage command to pulse width modulation according to a carrier wave and obtains a variable output voltage, is such that when the current detection is not required, the pulse width modulation is conducted according to the carrier wave having a carrier period, and when the current detection is required, the carrier period of the carrier wave is extended to an integral times value of the previous one. COPYRIGHT: (C)2003,JPO

6. 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.

7. 发明专利

JP2000354379A INVERTER DEVICE 失效
公开(公告)号：JP2000354379A
公开(公告)日：2000-12-19
申请号：JP2000081701
申请日：2000-03-17
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： OKUBO TOMOFUMI , HIRAGA MASAHIRO , TOKASHIKI MUTSUO
IPC分类号： H02M7/48 , H02M7/5387
摘要： PROBLEM TO BE SOLVED: To transmit command data at high speed and to increase the accuracy of an output voltage by letting an output voltage detection signal directly face a PWM command pulse signal without electrically insulating the former and, after data from an operation part is converted into pulses, by transmitting the data with command pulses through the insulated part through which high speed transmission is possible. SOLUTION: A pulse command numerical data signal 20 that regards dead time as zero is outputted from an operation part 17, and a pulse width modulating part 18 outputs it as a PWM command pulse signal 21. An insulating part 19 provides insulation against high breakdown voltage between the pulse width modulating part 18 and a pulse width correcting part 4, transmitting the PWM command pulse signal 21 to the pulse width correcting part 4 as another PWM command pulse signal 22. Here, a high breakdown voltage photocoupler is used as the insulating part 19. The pulse width correcting part 4 compares the PWM command pulse signal 22 with the fed-back output detection signal 14 of a main circuit part 6 to output PWM pulse signals 10, 11 to a driver part 5. As a result, the range of controllable output frequencies can be extended.

8. 发明专利

JPH09238494A INVERTER EQUIPMENT FOR DRIVING MOTOR 失效
公开(公告)号：JPH09238494A
公开(公告)日：1997-09-09
申请号：JP4630296
申请日：1996-03-04
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： NAKAMURA ATSUHIKO , TOMITA HIROYUKI , SASAKI TSUYOSHI , YONEMOTO SHINJI , HIRAGA MASAHIRO
IPC分类号： H02M7/48 , H02P27/06 , H02P7/63
摘要： PROBLEM TO BE SOLVED: To sufficiently restrain the transfer to inverter trip by torque limiting function while sufficiently keeping protective function, and surely prevent meaningless system down. SOLUTION: A control circuit 8 controls a power inverter part 5 by using a DC voltage VD detected by a DC voltage detecting part 4 and an output AC current IA detected by an AC current detecting part 6. Therefore, the inverter trip function for overload protection and the torque limiting function for load protection can be obtained. The inverter output frequency (f) is controlled according to the DC side voltage VD. When it exceeds a specified voltage at the time of operation of the torque limiting function, the dropping ratio of the inverter output frequency (f) is reduced, and it is prevented that a motor 7 turns to a regenerative state when the torque limiting function operates.

9. 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.

10. 发明专利

JPH04127617A FREQUENCY DIVIDER FOR PHASE DIFFERENCE PULSE SIGNAL 失效
公开(公告)号：JPH04127617A
公开(公告)日：1992-04-28
申请号：JP24714390
申请日：1990-09-19
申请人： HITACHI LTD , HITACHI KEIYO ENG
发明人： HIRAGA MASAHIRO , TOMITA HIROYUKI , TOKASHIKI MUTSUO
IPC分类号： G01D5/245 , H03K21/00
摘要： PURPOSE:To correct disturbance of a polarity inversion part and to obtain a frequency division phase difference pulse signal synchronously with an input signal and keeping the phase difference by counting correction pulses one more excessively when polarity inversion takes place in an input phase difference signal. CONSTITUTION:Pulse signals Ai, Bi being 90 deg. phase difference pulse signals are inputted to a 4-multiple circuit 5 and a phase polarity detection circuit 7, from which a 4-multiple pulse signal PLSA and a polarity signal SIGA are generated. When polarity inversion takes place and the mode of a counter 16 changes from count-up to count-down mode (when the SIGA changes from H to L), the mode is changed over after incrementing the count by 1 with a correction pulse signal PLSB. When the mode changes reversely (when the SIGA changes from L to H), the mode is changed over after the count is decremented by one. Thus, disturbance over the inputs Ai, Bi is prevented and a phase difference pulse subjected to frequency divider having a same phase difference before frequency division is obtained.

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