Patents by Inventor Shintaro Araki
Shintaro Araki 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: 9467086Abstract: An object of the present invention is to achieve reductions in size and costs of a vehicle-mounted motor driving control board in a configuration which allows the redundancy of a power supply to be ensured. The vehicle-mounted motor driving control board is formed by one printed circuit board on which are formed two inverter driving circuits for driving two inverter circuits for three-phase motors, and a voltage step-up/step-down driving circuit for driving a voltage step-up/step-down circuit for supplying electric power to the inverter circuits. The vehicle-mounted motor driving control board further includes a first power supply circuit for supplying electric power to part of constituent circuits constituting the voltage step-up/step-down driving circuit and the two inverter driving circuits, and a second power supply circuit for supplying electric power to the remainder of the constituent circuits in the voltage step-up/step-down driving circuit and the two inverter driving circuits.Type: GrantFiled: July 12, 2012Date of Patent: October 11, 2016Assignee: Mitsubishi Electric CorporationInventors: Shoji Saito, Yoshikazu Tsunoda, Khalid Hassan Hussein, Shintaro Araki
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Patent number: 9455718Abstract: A semiconductor device includes a semiconductor element having a gate and controlled with a gate voltage, a gate drive circuit which controls the gate voltage, an electrode connected to the semiconductor element, a principal current in the semiconductor element flowing through the electrode, a temperature sensing part which senses the temperature of the electrode, a generation section which generates, on the basis of the temperature sensed by the temperature sensing part, a first control signal for giving a maximum amount of energization to the semiconductor element in such a range that the temperature of the electrode does not exceed a predetermined temperature, and a comparison section which compares the first control signal and a second control signal transmitted from the outside for the purpose of controlling the gate voltage, and selects a selective control signal which is one of the control signals with which the temperature of the electrode can be limited.Type: GrantFiled: December 28, 2012Date of Patent: September 27, 2016Assignee: Mitsubishi Electric CorporationInventors: Mitsunori Aiko, Shintaro Araki
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Publication number: 20160276245Abstract: According to the present invention, a grease layer having a grease as a constituent material is provided in a filling region lying between a heat dissipation surface that is a bottom surface of a heat dissipation material of a semiconductor module and a surface of a cooler. Further, a seal material is formed on the surface of the cooler and covers the entire side surface region of the grease layer without any gap. The seal material has a liquid curable sealing agent as a constituent material.Type: ApplicationFiled: January 6, 2014Publication date: September 22, 2016Applicant: Mitsubishi Electric CorporationInventors: Ryoji MURAI, Shintaro ARAKI, Takaaki SHIRASAWA, Korehide OKAMOTO
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Publication number: 20160126168Abstract: A first switching element and a second switching element are thermally connected to each other since the first switching element and the second switching element are fixed on a second substrate. An upper arm is capable of increasing the current capacity of the semiconductor device because of the parallel connection of the first switching element and the second switching element. The lower arm is capable of increasing the current capacity of the semiconductor device because of the parallel connection of the first switching element and the second switching element.Type: ApplicationFiled: July 16, 2013Publication date: May 5, 2016Applicant: Mitsubishi Electric CorporationInventors: Shintaro ARAKI, Mitsunori AIKO, Takaaki SHIRASAWA, Khalid Hassan HUSSEIN
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Publication number: 20160079221Abstract: Fixing a semiconductor element to a substrate, electrically connecting signal and main terminals to the semiconductor element, a terminal aggregate includes a frame portion, the signal terminal, the main terminal, which has a larger width than the signal terminal, and a dummy terminal, and forming a to-be-encapsulated body in which the substrate, the semiconductor element, and the terminal aggregate are integrated, mounting the to-be-encapsulated body on a lower mold half such that a plurality of blocks formed in the lower mold half are meshed with the signal, main, and dummy terminals with no space left therebetween after the mounting, placing a bottom surface of an upper mold half on top surfaces of the plurality of blocks, and top surfaces of the signal, main, and dummy terminals to form a cavity for the substrate and the semiconductor element, and performing molding by injecting mold resin into the cavity are included.Type: ApplicationFiled: July 4, 2013Publication date: March 17, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Seiichiro INOKUCHI, Mitsunori AIKO, Shintaro ARAKI, Natsuki TSUJI
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Publication number: 20150333757Abstract: A semiconductor device includes a semiconductor element having a gate and controlled with a gate voltage, a gate drive circuit which controls the gate voltage, an electrode connected to the semiconductor element, a principal current in the semiconductor element flowing through the electrode, a temperature sensing part which senses the temperature of the electrode, a generation section which generates, on the basis of the temperature sensed by the temperature sensing part, a first control signal for giving a maximum amount of energization to the semiconductor element in such a range that the temperature of the electrode does not exceed a predetermined temperature, and a comparison section which compares the first control signal and a second control signal transmitted from the outside for the purpose of controlling the gate voltage, and selects a selective control signal which is one of the control signals with which the temperature of the electrode can be limited.Type: ApplicationFiled: December 28, 2012Publication date: November 19, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Mitsunori AIKO, Shintaro ARAKI
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Publication number: 20150155816Abstract: An object of the present invention is to achieve reductions in size and costs of a vehicle-mounted motor driving control board in a configuration which allows the redundancy of a power supply to be ensured. The vehicle-mounted motor driving control board is formed by one printed circuit board on which are formed two inverter driving circuits for driving two inverter circuits for three-phase motors, and a voltage step-up/step-down driving circuit for driving a voltage step-up/step-down circuit for supplying electric power to the inverter circuits. The vehicle-mounted motor driving control board further includes a first power supply circuit for supplying electric power to part of constituent circuits constituting the voltage step-up/step-down driving circuit and the two inverter driving circuits, and a second power supply circuit for supplying electric power to the remainder of the constituent circuits in the voltage step-up/step-down driving circuit and the two inverter driving circuits.Type: ApplicationFiled: July 12, 2012Publication date: June 4, 2015Applicant: Mitsubishi Electric CorporationInventors: Shoji Saito, Yoshikazu Tsunoda, Khalid Hassan Hussein, Shintaro Araki
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Patent number: 8749047Abstract: A power module includes a first semiconductor device having a collector terminal and an emitter terminal which extend outwardly from a molded resin, wherein at least one of the collector and emitter terminals is a bilaterally extending terminal extending outwardly from two opposite surfaces of the molded resin, and a second semiconductor device having the same construction as the first semiconductor device. The bilaterally extending terminal of the first semiconductor device is connected to a bilaterally extending terminal of the second semiconductor device.Type: GrantFiled: December 2, 2011Date of Patent: June 10, 2014Assignee: Mitsubishi Electric CorporationInventors: Shintaro Araki, Korehide Okamoto, Khalid Hassan Hussein, Mitsunori Aiko
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Patent number: 8710646Abstract: A power module includes a first semiconductor device having a collector terminal and an emitter terminal which extend outwardly from a molded resin, wherein at least one of the collector and emitter terminals is a bilaterally extending terminal extending outwardly from two opposite surfaces of the molded resin, and a second semiconductor device having the same construction as the first semiconductor device. The bilaterally extending terminal of the first semiconductor device is connected to a bilaterally extending terminal of the second semiconductor device.Type: GrantFiled: December 2, 2011Date of Patent: April 29, 2014Assignee: Mitsubishi Electric CorporationInventors: Shintaro Araki, Korehide Okamoto, Khalid Hassan Hussein, Mitsunori Aiko
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Publication number: 20120228741Abstract: A power module includes a first semiconductor device having a collector terminal and an emitter terminal which extend outwardly from a molded resin, wherein at least one of the collector and emitter terminals is a bilaterally extending terminal extending outwardly from two opposite surfaces of the molded resin, and a second semiconductor device having the same construction as the first semiconductor device. The bilaterally extending terminal of the first semiconductor device is connected to a bilaterally extending terminal of the second semiconductor device.Type: ApplicationFiled: December 2, 2011Publication date: September 13, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shintaro ARAKI, Korehide Okamoto, Khalid Hassan Hussein, Mitsunori Aiko
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Patent number: 5475157Abstract: There is disclosed a process for producing an aromatic hydroxylic compound by acid decomposition of a hydroperoxide having the general formula (I) ##STR1## wherein Ar represents an aromatic hydrocarbon group having a valence of n; and n represents an integer of 1 or 2, in the presence of an acid catalyst, thereby to provide an aromatic hydroxylic compound having the general formula (II)Ar--(OH)n (II)wherein Ar and n are the same as above defined, characterized in that tetrafluoroboric acid, hexafluorosilicic acid or hexafluorophosphoric acid is used as the acid catalyst. According to this process, the aromatic hydroxylic compound is obtained in a high yield while the by-production of hydroxyacetone is effectively suppressed.Type: GrantFiled: September 2, 1994Date of Patent: December 12, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shintaro Araki, Hiroshi Iwasaki, Hiroyasu Ohno, Isao Hashimoto, Teruaki Mukaiyama
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Patent number: 5475183Abstract: A process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms which comprises using a .gamma.-alumina catalyst containing 0.3% by weight or less of impurities in total excluding SiO.sub.2, the impurities including 0.2% by weight or less of sulfur content calculated in terms of SO.sub.4 - and 0.05% by weight or less of sodium content calculated in terms of Na.sub.2 O, and/or a process for the production of lower olefins by dehydrating lower alcohols having 2 to 4 carbon atoms that comprises using a .gamma.-alumina catalyst which contains 0.5 to 5% by weight of SiO.sub.2.According to the process of the present invention, lower olefins can be produced from lower alcohols with high yield and high selectivity for a prolonged period of time without reducing the catalytic activity.Type: GrantFiled: December 3, 1993Date of Patent: December 12, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Shintaro Araki, Katsuo Taniguchi, Toshiyuki Isaka
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Patent number: 5304555Abstract: This invention provides novel pyrimidines or their pharmaceutically acceptable salts thereof and process for preparation thereof. The novel compounds are useful for neurological diseases of the peripheral and central nervous systems of animals.Type: GrantFiled: October 19, 1990Date of Patent: April 19, 1994Assignees: Mitsui Petrochemical Industries, Ltd., Mitsui Pharmaceuticals, Inc.Inventors: Akira Awaya, Kazutoshi Horikomi, Tadayuki Sasaki, Hisashi Kobayashi, Akira Mizuchi, Takuo Nakano, Ikuo Tomino, Shintaro Araki, Mitsuyuki Takesue, Koji Kato, Keiichi Yokoyama
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Patent number: 5227563Abstract: Propylene can be prepared in high yield and selectivity by dehydrating isopropanol in the presence of a .gamma.-alumina catalyst having a mean pore diameter of from 30 to 150 .ANG. with a standard deviation (.sigma..sub.n) of from 10 to 40 .ANG. based on statistic calculation from pore diameter and pore volume.Type: GrantFiled: May 9, 1991Date of Patent: July 13, 1993Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Hiroshi Fukuhara, Fujihisa Matsunaga, Mitsuki Yasuhara, Shintaro Araki, Toshiyuki Isaka
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Patent number: 5015786Abstract: In a first form, a process is provided for preparing phenol by converting acetone by-produced by the cumene process into isopropanol, and alkylating benzene with the isopropanol and optional propylene, thereby forming phenol without acetone by-product. And cumene is prepared by alkylating benzene in the presence of a zeolite catalyst using isopropanol or a mixture of isopropanol and propylene as an alkylating agent. Further provided is the continuous alkylation of benzene with isopropanol wherein a reaction mixture is divided into first and second portions, with the first portion being recycled to the reactor and the second portion being taken out as a reaction product.Type: GrantFiled: November 27, 1989Date of Patent: May 14, 1991Assignee: Mitsui Petrochemical Industries Inc.Inventors: Shintaro Araki, Fujihisa Matsunaga, Hiroshi Fukuhara