Patents by Inventor Junichi Aizawa
Junichi Aizawa 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: 10418929Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.Type: GrantFiled: January 18, 2016Date of Patent: September 17, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Junichi Aizawa, Yoshikazu Nakano, Akihiro Daikoku, Shota Hanioka
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Patent number: 10361603Abstract: In a mechanically and electrically integrated driving apparatus, a common coolant flow channel for cooling a motor unit and an inverter unit is disposed inside a wall portion of a frame unit. Power modules are placed in close contact with an inner wall surface of the frame unit. A bracket that is separate from the frame unit is fitted into the frame unit. A space inside the frame unit is divided by the bracket into: a space in which the motor unit is housed; and a space in which the inverter unit is housed.Type: GrantFiled: October 20, 2014Date of Patent: July 23, 2019Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Junichi Aizawa, Yoshihiro Miyama, Akihiro Daikoku, Norihiro Watanabe, Hideaki Arita, Shota Hanioka, Shigetoshi Ipposhi
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Publication number: 20180269822Abstract: Provided are: a synchronous machine having permanent magnets as a field system; a stress estimator that estimates stress acting on the permanent magnets; and a first magnet temperature corrector that calculates an amount of demagnetization due to stress of armature interlinkage magnetic flux on the basis of the estimated stress, estimates an amount of demagnetization due to stress of the armature interlinkage magnetic flux on the basis of the rotor position of the synchronous machine, a current command and a voltage command, and the amount of demagnetization due to stress of the armature interlinkage magnetic flux; and outputs a permanent magnet temperature estimated value after correction, having factored therein the amount of demagnetization due to stress of the armature interlinkage magnetic flux from the estimated armature interlinkage magnetic flux.Type: ApplicationFiled: January 18, 2016Publication date: September 20, 2018Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Junichi AIZAWA, Yoshikazu NAKANO, Akihiro DAIKOKU, Shota HANIOKA
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Patent number: 9531368Abstract: A semiconductor switch circuit comprises: a first switch pair including two MOSFETs having gates connected one another and sources connected to one another, and a zener diode reversely connected between the gates and sources of the MOSFETs; a second switch pair including two MOSFETs having gates connected one another and sources connected to one another, and a zener diode reversely connected between the gates and sources of the MOSFETs; and a third switch pair comprising two MOSFETs having gates connected to one another and sources connected to one another. The first switch pair and the second switch pair are connected in series between two input/output terminals through a connecting node. The third switch pair is connected to the connecting node between the first switch pair and the second switch pair.Type: GrantFiled: August 16, 2014Date of Patent: December 27, 2016Assignee: Hitachi Power Semiconductor Device, Ltd.Inventors: Hironobu Honda, Fumiaki Yamashita, Junichi Aizawa
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Publication number: 20160276895Abstract: In a mechanically and electrically integrated driving apparatus, a common coolant flow channel for cooling a motor unit and an inverter unit is disposed inside a wall portion of a frame unit. Power modules are placed in close contact with an inner wall surface of the frame unit. A bracket that is separate from the frame unit is fitted into the frame unit. A space inside the frame unit is divided by the bracket into: a space in which the motor unit is housed; and a space in which the inverter unit is housed.Type: ApplicationFiled: October 20, 2014Publication date: September 22, 2016Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Junichi AIZAWA, Yoshihiro MIYAMA, Akihiro DAIKOKU, Norihiro WATANABE, Hideaki ARITA, Shota HANIOKA, Shigetoshi IPPOSHI
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Publication number: 20150087990Abstract: A semiconductor switch circuit comprises: a first switch pair including two MOSFETs having gates connected one another and sources connected to one another, and a zener diode reversely connected between the gates and sources of the MOSFETs; a second switch pair including two MOSFETs having gates connected one another and sources connected to one another, and a zener diode reversely connected between the gates and sources of the MOSFETs; and a third switch pair comprising two MOSFETs having gates connected to one another and sources connected to one another. The first switch pair and the second switch pair are connected in series between two input/output terminals through a connecting node. The third switch pair is connected to the connecting node between the first switch pair and the second switch pair.Type: ApplicationFiled: August 16, 2014Publication date: March 26, 2015Inventors: Hironobu HONDA, Fumiaki YAMASHITA, Junichi AIZAWA
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Patent number: 8391326Abstract: To obtain a laser light source module, a copper-based material is press-fitted into a through hole formed in a stem made of an iron-based material, thereby forming a first heat sink. A mount made of a copper-based material is fixed to the first heat sink and at least one semiconductor laser device is mounted on the mount. A second heat sink is bonded to lower surfaces of the stem and the first heat sink by a thermal conductive adhesive. An upper surface of the first heat sink is located on a same plane as that of the stem, and a lower surface of the first heat sink is located higher than that of the stem.Type: GrantFiled: March 18, 2008Date of Patent: March 5, 2013Assignee: Mitsubishi Electric CorporationInventors: Motoaki Tamaya, Kenji Okuda, Chise Nanba, Akira Nakamura, Junichi Aizawa
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Publication number: 20120054573Abstract: A communication apparatus is provided that can prevent decrease of transmission efficiency. In the apparatus, transmission processing section (107) transmits data, provides a non-transmission period on an intermittent basis, and stops transmission of the data in the non-transmission period. Reception processing section (103) receives a retransmission request for the data transmitted by transmission processing section (107). HARQ control section (105) performs retransmission processing of data requested to be retransmitted, wherein when a time of retransmission of the data requested to be retransmitted is in the non-transmission period, the HARQ control section stops the retransmission processing, and when the retransmission request is received again, the HARQ control section resumes the retransmission processing.Type: ApplicationFiled: May 7, 2010Publication date: March 1, 2012Applicants: NEC CASIO Mobile Communications, Ltd., PANASONIC CORPORATIONInventors: Hideki Kanemoto, Junichi Aizawa
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Patent number: 7883220Abstract: A projection apparatus includes an optical engine (10) that projects an image on a screen from a rear side, an engine supporting plate (100) on which the optical engine (10) is placed, an adjusting member (500) of a substantially wedge-shape inserted into between a base portion (11) and a lower surface of the engine supporting plate (100) so that front or rear end of the engine supporting plate (100) is vertically rotatable, a front-to-rear position adjusting unit (56) capable of moving the adjusting member (500) in front-to-rear direction, a slope portion (108) having a slope surface (109) that gradually increases or decreases an angle of a surface of the adjusting member (500) contacting the engine supporting plate (100) in accordance with a movement of the adjusting member (500), and a fixing unit (551, 552) that fixes the engine supporting plate (100) to an adjusted position.Type: GrantFiled: December 28, 2006Date of Patent: February 8, 2011Assignee: Mitsubishi Electric CorporationInventors: Atsushi Michimori, Junichi Aizawa, Eiji Niikura, Hidekazu Kodera
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Patent number: 7816637Abstract: An image display projector is provided so as to reduce scintillation. The image display projector comprises: an optical engine for emitting light according to an inputted imaging signal; a Fresnel lens disposed to receive the light emitted from the optical engine, for emitting the incident light as collimated one; a diffusion member, placed in front of the Fresnel lens in the light-traveling direction, for diffusing the collimated light emitted from the Fresnel lens; and a drive unit for moving either the Fresnel lens or the diffusion member, along a predetermined track (orbit), in a plane parallel to either the plane from which the collimated light or the diffused light is emitted. And then, the moving velocity of either the Fresnel lens or the diffusion member is at any moment larger than zero in any direction within the parallel plane.Type: GrantFiled: April 2, 2007Date of Patent: October 19, 2010Assignee: Mitsubishi Electric CorporationInventors: Atsushi Michimori, Junichi Aizawa, Tomohiro Sasagawa, Hiroaki Sugiura
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Patent number: 7330700Abstract: When a CQI that is based on CQI update cycle information and a CQI that is based on repetition count information have an overlapping transmission timing, CQI transmission timing controller 110 and CQI transmission timing priority determiner 120 transmit the CQI that is based on the CQI repetition count with priority. As a result, the receiving side is able to secure the combining count of the CQI and prevent deterioration in CQI error rate characteristics.Type: GrantFiled: July 29, 2004Date of Patent: February 12, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventor: Junichi Aizawa
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Patent number: 7295538Abstract: A base station apparatus (radio transmission apparatus) transmits a radio signal of data to a mobile terminal apparatus (communication apparatus of a transmission destination). The mobile terminal apparatus receiving the radio signal determines (ST1010) information (CQI) on a downlink transmission rate enabling reception in the mobile terminal apparatus based on reception quality such as CIR to transmit to the base station apparatus. The base station apparatus extracts a CQI value from the received radio signal, while obtaining likelihood of received data (ST1020), and corrects the CQI value based on the likelihood (ST1030). Then, based on the corrected CQI value, the base station apparatus determines a downlink transmission rate (ST1040).Type: GrantFiled: February 3, 2004Date of Patent: November 13, 2007Assignee: Matsushita Electric Industrial Co., LtdInventors: Junichi Aizawa, Hitoshi Iochi, Kazuyuki Miya
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Patent number: 7292862Abstract: An assignment section 101 determines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer section 102 to output forward transmission data. In addition, the assignment section 101 instructs a frame creation section 103 to perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer section 102 holds forward transmission data, and outputs forward transmission data to the frame creation section 103 in accordance with instructions from the assignment section 101. The frame creation section 103 symbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section 104.Type: GrantFiled: February 15, 2001Date of Patent: November 6, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Atsushi Sumasu, Osamu Kato, Mitsuru Uesugi, Yoshiko Saito, Toyoki Ue, Junichi Aizawa, Keiichi Kitagawa, Toshiyuki Uehara, Guizeng Shi
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Publication number: 20070247707Abstract: An image display projector and a method of displaying images are provided so as to enable reducing the occurrence of scintillation. The image display projector comprises: an optical engine for emitting light according to an inputted imaging signal; a Fresnel lens disposed to receive the light emitted from the optical engine, for emitting the incident light as collimated one; a diffusion member, placed in a position frontal to the Fresnel lens in the light-traveling direction, for emitting diffused light, by diffusing the collimated light emitted from the Fresnel lens; and a drive unit for moving either the Fresnel lens or the diffusion member, along a predetermined track (orbit), in a plane parallel to either the one from which the collimated light is emitted or the one from which the diffused light is emitted. And then, the moving velocity of either the Fresnel lens or the diffusion member is at any moment larger than zero in any direction within the parallel plane.Type: ApplicationFiled: April 2, 2007Publication date: October 25, 2007Applicant: Mitsubishi Electric CorporationInventors: Atsushi Michimori, Junichi Aizawa, Tomohiro Sasagawa, Hiroaki Sugiura
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Publication number: 20070183032Abstract: A projection apparatus includes an optical engine (10) that projects an image on a screen from a rear side, an engine supporting plate (100) on which the optical engine (10) is placed, an adjusting member (500) of a substantially wedge-shape inserted into between a base portion (11) and a lower surface of the engine supporting plate (100) so that front or rear end of the engine supporting plate (100) is vertically rotatable, a front-to-rear position adjusting unit (56) capable of moving the adjusting member (500) in front-to-rear direction, a slope portion (108) having a slope surface (109) that gradually increases or decreases an angle of a surface of the adjusting member (500) contacting the engine supporting plate (100) in accordance with a movement of the adjusting member (500), and a fixing unit (551, 552) that fixes the engine supporting plate (100) to an adjusted position.Type: ApplicationFiled: December 28, 2006Publication date: August 9, 2007Applicant: Mitsubishi Electric CorporationInventors: Atsushi Michimori, Junichi Aizawa, Eiji Niikura, Hidekazu Kodera
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Patent number: 7215642Abstract: In a receiving side apparatus 150, reception quality of receive data is measured by a reception quality measurement section 157, receive data errors are detected by an error detection section 156, and when an error is detected a retransmission request signal and reception quality signal are transmitted multiplexed with transmit data by a transmit frame creation section 158. In a transmitting side apparatus 100, when a retransmission request signal is received a capacity necessary for demodulating data in a receiving side apparatus 150 is detected from a reception quality signal by a scheduling section 110, and data is retransmitted at that capacity. By this means it is possible to reduce the number of data retransmissions during transmission and reception, and to improve transmission efficiency.Type: GrantFiled: May 18, 2001Date of Patent: May 8, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Mitsuru Uesugi, Katsuhiko Hiramatsu, Kazuyuki Miya, Osamu Kato, Junichi Aizawa, Toyoki Ue
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Patent number: 7206587Abstract: A communication mode determination section 201 determines the communication mode based on the CIR measured by a CIR measurement section 219; a DRC signal creation section 202 creates a DRC signal with a number corresponding to the communication mode; and a DRC power controller 205 refers to a transmission power table 206 showing the correspondence between DRC numbers and transmission power, and, based on the transmission power of the pilot signal output from a pilot power controller 209, increases transmission power in proportion as the DRC signal indicates that downlink channel quality is good.Type: GrantFiled: December 18, 2002Date of Patent: April 17, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Kenichi Miyoshi, Osamu Kato, Junichi Aizawa
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Publication number: 20060203727Abstract: A base station apparatus (radio transmission apparatus) transmits a radio signal of data to a mobile terminal apparatus (communication apparatus of a transmission destination). The mobile terminal apparatus receiving the radio signal determines (ST1010) information (CQI) on a downlink transmission rate enabling reception in the mobile terminal apparatus based on reception quality such as CIR to transmit to the base station apparatus. The base station apparatus extracts a CQI value from the received radio signal, while obtaining likelihood of received data (ST1020), and corrects the CQI value based on the likelihood (ST1030). Then, based on the corrected CQI value, the base station apparatus determines a downlink transmission rate (ST1040).Type: ApplicationFiled: February 3, 2004Publication date: September 14, 2006Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Junichi Aizawa, Hitoshi Iochi, Kazuyuki Miya
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Patent number: RE43614Abstract: An assignment section 101 determines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer section 102 to output forward transmission data. In addition, the assignment section 101 instructs a frame creation section 103 to perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer section 102 holds forward transmission data, and outputs forward transmission data to the frame creation section 103 in accordance with instructions from the assignment section 101. The frame creation section 103 symbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section 104.Type: GrantFiled: February 15, 2001Date of Patent: August 28, 2012Assignee: Panasonic CorporationInventors: Atsushi Sumasu, Osamu Kato, Mitsuru Uesugi, Yoshiko Saito, Toyoki Ue, Junichi Aizawa, Keiichi Kitagawa, Toshiyuki Uehara, Guizeng Shi
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Patent number: RE45312Abstract: An assignment section 101 determines communication resource assignment to communication terminals based on a transmission rate at which communication is possible for each subcarrier of each communication terminal, and instructs a buffer section 102 to output forward transmission data. In addition, the assignment section 101 instructs a frame creation section 103 to perform forward transmission data symbolization, and also outputs a signal indicating communication resource assignment to each communication terminal. The buffer section 102 holds forward transmission data, and outputs forward transmission data to the frame creation section 103 in accordance with instructions from the assignment section 101. The frame creation section 103 symbolizes a resource assignment signal and transmission data to create a frame, which it outputs to a spreading section 104.Type: GrantFiled: July 3, 2012Date of Patent: December 30, 2014Assignee: Panasonic Intellectual Property Corporation of AmericaInventors: Atsushi Sumasu, Osamu Kato, Mitsuru Uesugi, Yoshiko Saito, Toyoki Ue, Junichi Aizawa, Keiichi Kitagawa, Toshiyuki Uehara, Guizeng Shi