Patents by Inventor Hideo Okayama
Hideo Okayama 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: 9281760Abstract: A first pair including a highest-outer-side switching element and a switching element that operates as a neutral clamp diode on a higher potential side, a second pair including a lowest-outer-side switching element and a switching element that operates as a neutral clamp diode on a lower potential side, and a third pair including a higher-inner-side switching element and a lower-inner-side switching element are respectively configured from power modules that are two-element-inclusive power modules, a power conversion circuit portion being configured from the first pair, the second pair, and the third pair.Type: GrantFiled: April 26, 2012Date of Patent: March 8, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomohiro Kobayashi, Yukio Nakashima, Hideo Okayama
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Publication number: 20150078052Abstract: A first pair including a highest-outer-side switching element and a switching element that operates as a neutral clamp diode on a higher potential side, a second pair including a lowest-outer-side switching element and a switching element that operates as a neutral clamp diode on a lower potential side, and a third pair including a higher-inner-side switching element and a lower-inner-side switching element are respectively configured from power modules that are two-element-inclusive power modules, a power conversion circuit portion being configured from the first pair, the second pair, and the third pair.Type: ApplicationFiled: April 26, 2012Publication date: March 19, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Tomohiro Kobayashi, Yukio Narashima, Hideo Okayama
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Patent number: 8716884Abstract: There is provided a vehicle controller that is mounted in a box-shaped manner beneath the floor or on the roof of a vehicle so as to supply electric power to vehicle apparatuses. The vehicle controller is configured with a plurality of functional modules 4; each of the functional modules 4 has at one side thereof an interface side 22 in which a first interface region 5 where signal-line terminals are arranged and a second interface region 6 where power-line terminals are arranged are separated; in each of the interface sides 22, the first interface region 5 is disposed in the vicinity of one and the same end and the second interface region 6 is disposed in the vicinity of the other and the same end; the plurality of functional modules includes a monitoring circuit, an overvoltage protection circuit, and an inverter.Type: GrantFiled: January 26, 2007Date of Patent: May 6, 2014Assignee: Mitsubishi Electric CorporationInventors: Minoru Ikemoto, Hideo Okayama, Hidetoshi Kitanaka, Hidetoshi Sumita, Yoshinobu Koji, Kiyonobu Ueda, Yasuhisa Adachi, Makoto Sugiura
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Patent number: 8712618Abstract: To include a power converter that drives an induction machine and a control unit that controls the, power converter. The control unit includes a drive stopping unit. The drive stopping unit includes a secondary-resistance-temperature detecting unit that detects temperature rise of a secondary resistance of the induction machine based on a current (a d-axis-current detection value and a q-axis-current detection value, or a d-axis current command and a q-axis current command) detected by the induction machine, an inverter angular frequency calculated based on the current, and speed information of an electric vehicle detected by an external-speed-information detecting unit, and the drive stopping unit also includes a drive-stopping-signal output unit that outputs a drive stopping signal for stopping a driving operation of the power converter based on the speed information ?train of an electric vehicle and an output (deviation) from the secondary-resistance-temperature detecting unit.Type: GrantFiled: December 28, 2009Date of Patent: April 29, 2014Assignee: Mitsubishi Electric CorporationInventors: Masaki Kono, Hideo Okayama
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Patent number: 8701809Abstract: A vehicle control device includes plural functional modules each of which is a minimum part unit that contributes to change in input/output potentials, and has an input and an output of one power line or one set of power lines, except for power lines having a same potential as that on an overhead wire side or that on a ground side. The functional module has an interface surface on one side surface, to which both of a signal line and the power line are connected. Each interface surface is divided into a first interface area in which a signal line terminal connected to the signal line is placed, and a second interface area in which a power line terminal connected to the power line is placed. The plural functional modules are adjacently arranged such that the interface surfaces face in a same direction, the first interface areas are located on one end side in common, and the second interface areas are located on the other end side in common.Type: GrantFiled: October 10, 2008Date of Patent: April 22, 2014Assignee: Mitsubishi Electric CorporationInventors: Minoru Ikemoto, Hideo Okayama, Yasuaki Mamoto, Yoshio Nagatsuka, Tetsuya Takahashi, Hidetoshi Sumita
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Patent number: 8598837Abstract: An object is to provide a driving controller for an AC motor that can prevent generation of an excessive voltage between lines of a motor and between contacts of a motor cut-off contactor and a continuous arc between contacts of the motor cut-off contactor, regardless of the type of a fault occurred, even when a phase in which a current zero point is not generated and a phase in which a current zero point is generated coexist in a fault current that flows between an inverter and the motor. A control unit is configured to open a motor cut-off contactor not at a time when a state of a detected current is determined to be abnormal but at a time when the state of the current is determined to be normal, even when a basic contactor-close command MKC0 becomes off (L level).Type: GrantFiled: February 29, 2008Date of Patent: December 3, 2013Assignee: Mitsubishi Electric CorporationInventors: Hidetoshi Kitanaka, Hideo Okayama, Shinichi Furutani, Toshie Takeuchi, Mitsuru Tsukima
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Patent number: 8493731Abstract: There is provided a first accommodating chamber that accommodates a cooling unit frame that supports a cooling unit. The cooling unit includes a cooler that cools heat generated from a snubber circuit component and a semiconductor device utilizing cooling air from an air blower, a conductor bar that electrically connects the semiconductor device and a capacitor with each other, the snubber circuit component, and the semiconductor device. There is also provided a second accommodating chamber that accommodates the capacitor. The cooling unit and the capacitor can be separated from each other by detaching one of a connecting portion between a laminated bus bar and the conductor bar and a connecting portion between the laminated bus bar and the capacitor.Type: GrantFiled: November 5, 2008Date of Patent: July 23, 2013Assignee: Mitsubishi Electric CorporationInventors: Tetsuya Takahashi, Hideo Okayama
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Publication number: 20120209467Abstract: To include a power converter that drives an induction machine and a control unit that controls the, power converter. The control unit includes a drive stopping unit. The drive stopping unit includes a secondary-resistance-temperature detecting unit that detects temperature rise of a secondary resistance of the induction machine based on a current (a d-axis-current detection value and a q-axis-current detection value, or a d-axis current command and a q-axis current command) detected by the induction machine, an inverter angular frequency calculated based on the current, and speed information of an electric vehicle detected by an external-speed-information detecting unit, and the drive stopping unit also includes a drive-stopping-signal output unit that outputs a drive stopping signal for stopping a driving operation of the power converter based on the speed information ?train of an electric vehicle and an output (deviation) from the secondary-resistance-temperature detecting unit.Type: ApplicationFiled: December 28, 2009Publication date: August 16, 2012Applicant: Mitsubishi Electric CorporationInventors: Masaki Kono, Hideo Okayama
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Patent number: 8225854Abstract: A heat sink including a compact cooling system, superior uniformity of heating, provides a compact cooling unit superior in uniformity of cooling. A heat sink includes a header for distribution connected to a cooling fluid inlet, a header for confluence connected to a cooling fluid outlet and parallel to and adjacent to the header for distribution and a heat transfer vessel including a heating element mounting surface as well as channels inside. The channels are connected to the header for distribution and the header for confluence.Type: GrantFiled: January 11, 2006Date of Patent: July 24, 2012Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigetoshi Ippoushi, Akira Yamada, Takeshi Tanaka, Akihiro Murahashi, Kazuyoshi Toya, Hideo Okayama
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Patent number: 8104558Abstract: A vehicle controller is mounted in a box-shaped manner beneath the floor or on the roof of a vehicle so as to supply electric power to vehicle apparatuses. The vehicle controller is configured with a plurality of functional modules; each of the functional modules has at one side thereof an interface side in which a first interface region where signal-line terminals are arranged and a second interface region where power-line terminals are arranged are separated; in each of the interface sides, the first interface region is disposed at one and the same end and the second interface region is disposed at the other and the same end.Type: GrantFiled: January 26, 2007Date of Patent: January 31, 2012Assignee: Mitsubishi Electric CorporationInventors: Hideo Okayama, Yoshinobu Koji, Kiyonobu Ueda, Yasuhisa Adachi
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Publication number: 20110188200Abstract: There is provided a first accommodating chamber that accommodates a cooling unit frame that supports a cooling unit. The cooling unit includes a cooler that cools heat generated from a snubber circuit component and a semiconductor device utilizing cooling air from an air blower, a conductor bar that electrically connects the semiconductor device and a capacitor with each other, the snubber circuit component, and the semiconductor device. There is also provided a second accommodating chamber that accommodates the capacitor.Type: ApplicationFiled: November 5, 2008Publication date: August 4, 2011Applicant: Mitsubishi Electric CorporationInventors: Tetsuya Takahashi, Hideo Okayama
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Publication number: 20110176281Abstract: A vehicle control device includes plural functional modules each of which is a minimum part unit that contributes to change in input/output potentials, and has an input and an output of one power line or one set of power lines, except for power lines having a same potential as that on an overhead wire side or that on a ground side. The functional module has an interface surface on one side surface, to which both of a signal line and the power line are connected. Each interface surface is divided into a first interface area in which a signal line terminal connected to the signal line is placed, and a second interface area in which a power line terminal connected to the power line is placed. The plural functional modules are adjacently arranged such that the interface surfaces face in a same direction, the first interface areas are located on one end side in common, and the second interface areas are located on the other end side in common.Type: ApplicationFiled: October 10, 2008Publication date: July 21, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Minoru Ikemoto, Hideo Okayama, Yasuaki Mamoto, Yoshio Nagatsuka, Tetsuya Takahashi, Hidetoshi Sumita
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Publication number: 20100289439Abstract: An object is to provide a driving controller for an AC motor that can prevent generation of an excessive voltage between lines of a motor and between contacts of a motor cut-off contactor and a continuous arc between contacts of the motor cut-off contactor, regardless of the type of a fault occurred, even when a phase in which a current zero point is not generated and a phase in which a current zero point is generated coexist in a fault current that flows between an inverter and the motor. A control unit is configured to open a motor cut-off contactor not at a time when a state of a detected current is determined to be abnormal but at a time when the state of the current is determined to be normal, even when a basic contactor-close command MKC0 becomes off (L level).Type: ApplicationFiled: February 29, 2008Publication date: November 18, 2010Applicant: Mitsubishi Electric CorporationInventors: Hidetoshi Kitanaka, Hideo Okayama, Shinichi Furutani, Toshie Takeuchi, Mitsuru Tsukima
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Publication number: 20090240384Abstract: There is provided a vehicle controller that is mounted in a box-shaped manner beneath the floor or on the roof of a vehicle so as to supply electric power to vehicle apparatuses. The vehicle controller is configured with a plurality of functional modules 4; each of the functional modules 4 has at one side thereof an interface side 22 in which a first interface region 5 where signal-line terminals are arranged and a second interface region 6 where power-line terminals are arranged are separated; in each of the interface sides 22, the first interface region 5 is disposed in the vicinity of one and the same end and the second interface region 6 is disposed in the vicinity of the other and the same end; the plurality of functional modules includes a monitoring circuit, an overvoltage protection circuit, and an inverter.Type: ApplicationFiled: January 26, 2007Publication date: September 24, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Minoru Ikemoto, Hideo Okayama, Hidetoshi Kitanaka, Hidetoshi Sumita, Yoshinobu Koji, Kiyonobu Ueda, Yasuhisa Adachi, Makoto Sugiura
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Publication number: 20090114372Abstract: A heat sink includes a heat-transfer container incorporating a flow path through which a cooling fluid flows, for cooling a heating element in contact with the heat-transfer container The flow path includes a first cross-sectional portion that becomes narrower as the distance between a given point in the flow path and a side of the heat-transfer container which makes contact with the heating element becomes longer in a direction perpendicular to the direction in which the cooling fluid flows, and a second cross-sectional portion that is approximately constant in the direction perpendicular to the direction in which the cooling fluid flows. The first cross-sectional portion and the second cross-sectional portion alternately continue in the direction in which the cooling fluid flows causing a three-dimensional flow so the heat-transfer properties are enhanced with a simplified structure.Type: ApplicationFiled: September 13, 2005Publication date: May 7, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shigetoshi Ippoushi, Tetsuro Ogushi, Seiji Haga, Toru Kimura, Akira Yamada, Hiroshi Yamabuchi, Akihiro Murahashi, Hideo Okayama, Nobuaki Uehara
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Publication number: 20090101419Abstract: There is provided a vehicle controller that is mounted in a box-shaped manner beneath the floor or on the roof of a vehicle so as to supply electric power to vehicle apparatuses. The vehicle controller is configured with a plurality of functional modules 4; each of the functional modules 4 has at one side thereof an interface side 22 in which a first interface region 5 where signal-line terminals are arranged and a second interface region where power-line terminals are arranged are separated; in each of the interface sides 22, the first interface region 5 is disposed at one and the same end and the second interface region 6 is disposed at the other and the same end.Type: ApplicationFiled: January 26, 2007Publication date: April 23, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hideo Okayama, Yoshinobu Koji, Kiyonobu Ueda, Yasuhisa Adachi
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Publication number: 20090080159Abstract: A heat sink including a compact cooling system, superior uniformity of heating, provides a compact cooling unit superior in uniformity of cooling. A heat sink includes a header for distribution connected to a cooling fluid inlet, a header for confluence connected to a cooling fluid outlet and parallel to and adjacent to the header for distribution and a heat transfer vessel including a heating element mounting surface as well as channels inside. The channels are connected to the header for distribution and the header for confluence.Type: ApplicationFiled: January 11, 2006Publication date: March 26, 2009Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Shigetoshi Ippoushi, Akira Yamada, Takeshi Tanaka, Akihiro Murahashi, Kazuyoshi Toya, Hideo Okayama
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Patent number: 7345379Abstract: A power converter includes a steady-state controller for outputting a first voltage command such that a detected power value matches a power command, a transient controller for outputting a second voltage command such that a voltage detected before the occurrence of a fault is maintained when the fault occurs, and a voltage command selector for switching the voltage command in such a way that the first voltage command is output when no power fault is detected and the sum of the first and second voltage commands is output when any power fault is detected.Type: GrantFiled: November 30, 2004Date of Patent: March 18, 2008Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Hideo Okayama, Toshiyuki Fujii
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Publication number: 20050141157Abstract: A power converter includes a steady-state controller for outputting a first voltage command such that a detected power value matches a power command, a transient controller for outputting a second voltage command such that a voltage detected before the occurrence of a fault is maintained when the fault occurs, and a voltage command selector for switching the voltage command in such a way that the first voltage command is output when no power fault is detected and the sum of the first and second voltage commands is output when any power fault is detected.Type: ApplicationFiled: November 30, 2004Publication date: June 30, 2005Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventors: Hideo Okayama, Toshiyuki Fujii
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Publication number: 20040240237Abstract: A power converter outputting a large current while reducing harmonics flowing into an AC power supply and an AC load. The power converter includes power units, each of which includes an input transformer having at least one primary winding connected with a polyphase AC power supply and at least one secondary winding, a polyphase self-excited rectifier circuit connected with the secondary winding, and a single-phase self-excited inverter circuit connected with the polyphase self-excited rectifier circuit through a DC link circuit to generate a single-phase output. One of single-phase outputs of each power unit is connected with one of single-phase outputs of another power unit so that the outputs of the power units are cascaded in series with one another, with serially connected outputs of the power units connected to a polyphase AC load.Type: ApplicationFiled: April 14, 2004Publication date: December 2, 2004Applicant: Mitsubishi Denki Kabushiki KaishaInventors: Hideo Okayama, Yasuhito Shimomura