Patents by Inventor Keiichi Mashino
Keiichi Mashino has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7508068Abstract: One method of achieving the above subjects is by connecting a block member 14, which is connected to the side opposite to that of a semiconductor chip 11 having insulating substrates 12 and 13 connected to the top and bottom of the semiconductor chip 11, to a block member 15 across an laminated structure constituted by the semiconductor chip 11 and the insulating substrates 12 and 13.Type: GrantFiled: February 1, 2007Date of Patent: March 24, 2009Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsuhiro Yoshizaki, Keiichi Mashino, Hiromichi Anan, Yoshitaka Ochiai
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Patent number: 7471004Abstract: An AC generator comprises a rotor and a stator having a three-phase winding. A three-phase inverter is connected to the three-phase winding. Here, the three-phase winding comprises at least two independent three-phase windings. Switching elements for respective phases of the three-phase inverter are connected in parallel by the number of the independent three-phase windings, and in-phase windings are individually connected to their parallel switching elements.Type: GrantFiled: May 7, 2007Date of Patent: December 30, 2008Assignee: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Takashi Kobayashi, Noriaki Hino, Shinji Shirakawa, Keiichi Mashino, Masanori Tsuchiya
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Patent number: 7453240Abstract: A generator having a field coil L, and an SW1 control circuit 2 for controlling field current flowing through the field coil L. When a generating operation of the generator is to be ended, a switch 1 SW1 is turned off to interrupt the field current flowing through the field coil L, and a switch 2 SW2 is turned off to allow the field current remaining the field coil L to the current path including a resistance element 1 with a resistance element capable of quickly attenuating the field current.Type: GrantFiled: February 17, 2006Date of Patent: November 18, 2008Assignee: Hitachi, Ltd.Inventors: Tatsumi Yamauchi, Shinji Shirakawa, Masahiro Iwamura, Masamitsu Inaba, Keiichi Mashino, Keiji Kunii
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Patent number: 7374000Abstract: To provide a vehicle driving apparatus capable of providing a sufficient driving force. A driving high-power generator is driven by an engine. A DC motor is driven directly by energy from the generator. A driving generator output voltage control circuit controls output voltage of the generator in accordance with the demanded driving force from the vehicle to control the motor.Type: GrantFiled: February 27, 2001Date of Patent: May 20, 2008Assignee: Hitachi, Ltd.Inventors: Tatsuyuki Yamamoto, Yoshinori Fukasaku, Keiichi Mashino, Yuuji Maeda, Susumu Tajima, Hisaya Shimizu, Keisuke Nishidate
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Publication number: 20070200346Abstract: An AC generator comprises a rotor and a stator having a three-phase winding. A three-phase inverter is connected to the three-phase winding. Here, the three-phase winding comprises at least two independent three-phase windings. Switching elements for respective phases of the three-phase inverter are connected in parallel by the number of the independent three-phase windings, and in-phase windings are individually connected to their parallel switching elements.Type: ApplicationFiled: May 7, 2007Publication date: August 30, 2007Applicant: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Takashi Kobayashi, Noriaki Hino, Shinji Shirakawa, Keiichi Mashino, Masanori Tsuchiya
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Publication number: 20070182384Abstract: An inverter device is mounted on the rotating electric machine body The inverter device includes a module unit having a converter circuit and a control unit that controls the operation of the converter circuit. The converter circuit is configured by connecting a plurality of the following series circuits in parallel, each of the series circuits includes a P-channel MOS semiconductor device disposed at a higher potential side and an N-channel MOS semiconductor device disposed at a lower potential side which are electrically connected in series. An electric power that is supplied from a battery or an electric power that is supplied to the battery is controlled.Type: ApplicationFiled: April 16, 2007Publication date: August 9, 2007Applicant: HITACHI LTD.Inventors: Shinji SHIRAKAWA, Mutsuhiro MORI, Masamitsu INABA, Tatsumi YAMAUCHI, Masahiro IWAMURA, Keiichi MASHINO, Masanori TSUCHIYA
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Publication number: 20070159864Abstract: One method of achieving the above subjects is by connecting a block member 14, which is connected to the side opposite to that of a semiconductor chip 11 having insulating substrates 12 and 13 connected to the top and bottom of the semiconductor chip 11, to a block member 15 across an laminated structure constituted by the semiconductor chip 11 and the insulating substrates 12 and 13.Type: ApplicationFiled: February 1, 2007Publication date: July 12, 2007Applicants: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsuhiro Yoshizaki, Keiichi Mashino, Hiromichi Anan, Yoshitaka Ochiai
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Patent number: 7224079Abstract: An AC generator comprises a rotor and a stator having a three-phase winding. A three-phase inverter is connected to the three-phase winding. Here, the three-phase winding comprises at least two independent three-phase windings. Switching elements for respective phases of the three-phase inverter are connected in parallel by the number of the independent three-phase windings, and in-phase windings are individually connected to their parallel switching elements.Type: GrantFiled: July 11, 2005Date of Patent: May 29, 2007Assignee: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Takashi Kobayashi, Noriaki Hino, Shinji Shirakawa, Keiichi Mashino, Masanori Tsuchiya
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Patent number: 7208918Abstract: An inverter device is mounted on the rotating electric machine body The inverter device includes a module unit having a converter circuit and a control unit that controls the operation of the converter circuit. The converter circuit is configured by connecting a plurality of the following series circuits in parallel, each of the series circuits includes a P-channel MOS semiconductor device disposed at a higher potential side and an N-channel MOS semiconductor device disposed at a lower potential side which are electrically connected in series. An electric power that is supplied from a battery or an electric power that is supplied to the battery is controlled.Type: GrantFiled: April 11, 2005Date of Patent: April 24, 2007Assignee: Hitachi, Ltd.Inventors: Shinji Shirakawa, Mutsuhiro Mori, Masamitsu Inaba, Tatsumi Yamauchi, Masahiro Iwamura, Keiichi Mashino, Masanori Tsuchiya
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Patent number: 7193317Abstract: One method of achieving the above subjects is by connecting a block member 14, which is connected to the side opposite to that of a semiconductor chip 11 having insulating substrates 12 and 13 connected to the top and bottom of the semiconductor chip 11, to a block member 15 across an laminated structure constituted by the semiconductor chip 11 and the insulating substrates 12 and 13.Type: GrantFiled: July 2, 2003Date of Patent: March 20, 2007Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsuhiro Yoshizaki, Keiichi Mashino, Hiromichi Anan, Yoshitaka Ochiai
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Publication number: 20060192534Abstract: A generator having a field coil L, and an SW1 control circuit 2 for controlling field current flowing through the field coil L. When a generating operation of the generator is to be ended, a switch 1 SW1 is turned off to interrupt the field current flowing through the field coil L, and a switch 2 SW2 is turned off to allow the field current remaining the field coil L to the current path including a resistance element 1 with a resistance element capable of quickly attenuating the field current.Type: ApplicationFiled: February 17, 2006Publication date: August 31, 2006Applicant: Hitachi, Ltd.Inventors: Tatsumi Yamauchi, Shinji Shirakawa, Masahiro Iwamura, Masamitsu Inaba, Keiichi Mashino, Keiji Kunii
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Patent number: 7075201Abstract: A multi-phase alternating-current rotational electric machine wherein semiconductor switching devices are electrically insulated from heat sinks, and the heat sinks are grounded to the housing and thermally separated in each phase.Type: GrantFiled: August 19, 2003Date of Patent: July 11, 2006Assignee: Hitachi, Ltd.Inventors: Yoshimasa Takahashi, Hironori Kodama, Yutaka Kobayashi, Keiichi Mashino, Syouju Masumoto
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Patent number: 7044255Abstract: An electric generating system for automobiles has a primary generator which is driven by an internal combustion engine of an automobile and supplies power to an electric load of the automobile and an electric motor for driving wheels of the automobile which are not driven by the internal combustion engine. A secondary generator is driven by the internal combustion engine and drives the motor. A control unit controls the secondary generator and the electric motor. The control circuit controls the output of the generator according to a driving force requested by the automobile, and the driving force of the electric motor is controlled by the output of the secondary generator.Type: GrantFiled: December 15, 2000Date of Patent: May 16, 2006Assignee: Hitachi, Ltd.Inventors: Yuuji Maeda, Keiichi Mashino, Hisaya Shimizu, Tatsuyuki Yamamoto, Yoshinori Fukasaku, Susumu Tajima, Toshiyuki Innami, Keisuke Mishidate
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Publication number: 20060006655Abstract: An AC generator comprises a rotor and a stator having a three-phase winding. A three-phase inverter is connected to the three-phase winding. Here, the three-phase winding comprises at least two independent three-phase windings. Switching elements for respective phases of the three-phase inverter are connected in parallel by the number of the independent three-phase windings, and in-phase windings are individually connected to their parallel switching elements.Type: ApplicationFiled: July 11, 2005Publication date: January 12, 2006Applicant: Hitachi, Ltd.Inventors: Hiroshi Kanazawa, Takashi Kobayashi, Noriaki Hino, Shinji Shirakawa, Keiichi Mashino, Masanori Tsuchiya
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Patent number: 6965173Abstract: The present invention provides a vehicle driving apparatus capable of being mounted easily even in a narrow space such as under-floor of the vehicle. The vehicle driving apparatus comprises a first and a second generators driven by an engine for driving front wheels, and a motor driven by receiving a power supply from the second generator to drive rear wheels, the first and second generators being installed in the vicinity of an engine within an engine room, the motor being arranged in the vicinity of a differential gear with which a reduction mechanism is integrated and is positioned substantially in a central part of the rear wheels.Type: GrantFiled: February 27, 2001Date of Patent: November 15, 2005Assignee: Hitachi, Ltd.Inventors: Yoshinori Fukasaku, Tatsuyuki Yamamoto, Yuuji Maeda, Keiichi Mashino, Susumu Tajima, Hisaya Shimizu, Keisuke Nishidate, Toshiyuki Innami
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Publication number: 20050237033Abstract: An inverter device is mounted on the rotating electric machine body The inverter device includes a module unit having a converter circuit and a control unit that controls the operation of the converter circuit. The converter circuit is configured by connecting a plurality of the following series circuits in parallel, each of the series circuits includes a P-channel MOS semiconductor device disposed at a higher potential side and an N-channel MOS semiconductor device disposed at a lower potential side which are electrically connected in series. An electric power that is supplied from a battery or an electric power that is supplied to the battery is controlled.Type: ApplicationFiled: April 11, 2005Publication date: October 27, 2005Applicant: Hitachi, Ltd.Inventors: Shinji Shirakawa, Mutsuhiro Mori, Masamitsu Inaba, Tatsumi Yamauchi, Masahiro Iwamura, Keiichi Mashino, Masanori Tsuchiya
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Patent number: 6943445Abstract: The present invention provides a semiconductor device which reduces an inductance of wiring for bridge-connecting semiconductor switches and realizes a reduction in size. Within the semiconductor device formed are two controllable bridge-connected semiconductor switches 13a and 13b, an output terminal, positive/negative polarity DC terminals 2 and 3, and an insulating substrate 15a in which conductor layers 12, 17 and 19 having a conductor section and in an inner layer for bridge-connecting the semiconductor switches to the DC terminals on a surface thereof and insulating layers 16 and 18 are alternately laminated. The surface and inner-layer conductor layers 12 and 17 which interpose the insulating layer 16 therebetween are electrically connected by a conductor 20 passing through the insulating layer 16 interposed between the conductor layers 12 and 17.Type: GrantFiled: March 29, 2002Date of Patent: September 13, 2005Assignee: Hitachi, Ltd.Inventors: Shinji Shirakawa, Akira Mishima, Keiichi Mashino, Toshiyuki Innami, Shinichi Fujino, Hiromichi Anan, Yoshitaka Ochiai
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Patent number: 6938713Abstract: The present invention is characterized by a hybrid car comprising a motor generator mechanically connected with the crank shaft of an internal combustion engine for driving a car wherein the internal combustion engine is started by electric power supplied by a battery and power is generated by rotation from the internal combustion engine to charge the battery, an inverter for controlling the drive and power generation of the motor generator, and a control circuit for controlling the inverter, this hybrid car further characterized in that the motor generator is driven by battery power to start the internal combustion engine, and after the internal combustion engine has started, the battery is charged by the generator mode operation of the motor generator using the power of the internal combustion engine, wherein a step-down chopper circuit is provided between the battery and the inverter, and step-down control is provided to ensure that the power generation voltage will reach the level of the battery chargingType: GrantFiled: September 20, 1999Date of Patent: September 6, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Kazuo Tahara, Houng Joong Kim, Tsunehiro Endo, Ryoso Masaki, Kou Ajima, Toshiyuki Innami, Keiichi Mashino, Yoshimi Sakurai
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Patent number: 6873045Abstract: One method of achieving the above subjects is by connecting one of electroconductive members 12, which are pre-connected to the top and bottom of a semiconductor chip 11 and have thermal conductivity, to an electroconductive member 13, which is used with the semiconductor chip 11 to constitute a laminated structure, in electrically insulated form on the same surface as the installation surface of the electroconductive member 13 so as to straddle the laminated structure constituted by the semiconductor chip 11 and the electroconductive member 13.Type: GrantFiled: July 2, 2003Date of Patent: March 29, 2005Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.Inventors: Atsuhiro Yoshizaki, Keiichi Mashino, Hiromichi Anan, Yoshitaka Ochiai
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Patent number: 6843335Abstract: A positive side conductor and a negative side conductor of an input terminal electrically connected to semiconductor elements, are electrically insulated from each other, and are laminated with each other, and the input terminal having such a laminated structure, an output terminal and substrates mounted thereon the semiconductor elements are arranged in a checkered pattern in a container. Further, the semiconductor elements mounted on the substrates, the input terminal and the output terminal are electrically connected to one another so as to obtain a loop-like electric path on a conductive member, thereby it is possible to aim at miniaturizing the power conversion apparatus and lowering the inductance thereof.Type: GrantFiled: December 21, 2001Date of Patent: January 18, 2005Assignee: Hitachi, Ltd.Inventors: Shinji Shirakawa, Akira Mishima, Keiichi Mashino, Toshiyuki Innami, Shinichi Fujino, Hiromichi Anan, Yoshitaka Ochiai