Patents by Inventor Chiaki Fujimoto
Chiaki Fujimoto 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: 11952441Abstract: A method for producing polytetrafluoroethylene, which includes polymerizing tetrafluoroethylene in an aqueous medium in the presence of a nucleating agent and a hydrocarbon anionic surfactant to obtain polytetrafluoroethylene. A total amount of the nucleating agent and the hydrocarbon anionic surfactant at the initiation of polymerization is more than 50 ppm based on the aqueous medium.Type: GrantFiled: October 3, 2019Date of Patent: April 9, 2024Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Taketo Kato, Yohei Fujimoto, Kenji Ichikawa, Hiroyuki Sato, Yoshinori Nanba, Hirotoshi Yoshida, Kengo Ito, Chiaki Okui, Masamichi Sukegawa, Taku Yamanaka
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Publication number: 20240067258Abstract: A rotating machine control device comprises: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotating machine, based on a first direct-current voltage that has been output from a direct-current power supply of the first system; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotating machine, based on a second direct-current voltage that has been output from a direct-current power supply of the second system; a first controller; and a second controller, in that the first controller and the second controller each limit an own system voltage command related to a voltage to be applied to the three-phase windings of an own system by use of a direct-current voltage of an other system, in a case where a direct-current voltage of the own system is higher than the direct-current voltage of the other system, and also generate a value obtained by normalizing the own system voltagType: ApplicationFiled: April 16, 2021Publication date: February 29, 2024Applicant: Mitsubishi Electric CorporationInventors: Tomohiro TAMARU, Tatsuya MORI, Chiaki FUJIMOTO
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Publication number: 20240051598Abstract: A rotary machine control device includes: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotary machine, according to a first direct-current voltage; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotary machine; a first controller that generates a command value of a d-axis electric current of the first system, according to a direct-current voltage minimum value and a command value of the rotary machine, the direct-current voltage minimum value being a lower one of the first direct-current voltage and the second direct-current voltage, that generates a command value of a q-axis electric current of the first system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the first system, and that controls the first inverter, according to the command value of the d-axis electric current of the first system and the cType: ApplicationFiled: April 16, 2021Publication date: February 15, 2024Applicant: Mitsubishi Electric CorporationInventors: Yuya TSUCHIMOTO, Tatsuya MORI, Chiaki FUJIMOTO, Kenta KUBO
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Patent number: 11595144Abstract: Based on a count value held by a transmission counter, an information multiplex apparatus forms multiplexed transmission data by selecting or dividing at least part of each of two or more information items, based on the respective sizes of the two or more information items, a counter period of the transmission counter, and a transmission margin degree.Type: GrantFiled: July 23, 2021Date of Patent: February 28, 2023Assignee: Mitsubishi Electric CorporationInventors: Takahiro Yamaguchi, Chiaki Fujimoto
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Patent number: 11206096Abstract: Based on a count value held by a transmission counter, an information multiplex apparatus forms multiplexed transmission data by selecting or dividing at least part of each of two or more information items, based on the respective sizes of the two or more information items, a counter period of the transmission counter, and a transmission margin degree.Type: GrantFiled: May 10, 2018Date of Patent: December 21, 2021Assignee: Mitsubishi Electric CorporationInventors: Takahiro Yamaguchi, Chiaki Fujimoto
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Publication number: 20210351857Abstract: Based on a count value held by a transmission counter, an information multiplex apparatus forms multiplexed transmission data by selecting or dividing at least part of each of two or more information items, based on the respective sizes of the two or more information items, a counter period of the transmission counter, and a transmission margin degree.Type: ApplicationFiled: July 23, 2021Publication date: November 11, 2021Applicant: Mitsubishi Electric CorporationInventors: Takahiro YAMAGUCHI, Chiaki FUJIMOTO
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Publication number: 20210058182Abstract: Based on a count value held by a transmission counter, an information multiplex apparatus forms multiplexed transmission data by selecting or dividing at least part of each of two or more information items, based on the respective sizes of the two or more information items, a counter period of the transmission counter, and a transmission margin degree.Type: ApplicationFiled: May 10, 2018Publication date: February 25, 2021Applicant: Mitsubishi Electric CorporationInventors: Takahiro YAMAGUCHI, Chiaki FUJIMOTO
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Patent number: 10333311Abstract: A control unit of an electric motor control device includes an inverter circuit 6 that supplies power to an electric motor, a current control unit that outputs a voltage command value as a drive command of the inverter circuit, a current detecting unit that detects current flowing to each phase of the electric motor, and a failed phase identifying unit that identifies a location of a failure in the current detecting unit. The failed phase identifying unit determines whether or not a magnitude or a phase of a frequency component of the test voltage command included in a detected current value when the inverter circuit is driven with a test voltage command having a frequency higher than a rotational frequency of the electric motor as a drive command is within a predetermined range, and determines that a failure has occurred in a phase that is not within the predetermined range.Type: GrantFiled: January 14, 2016Date of Patent: June 25, 2019Assignee: Mitsubishi Electric CorporationInventors: Chiaki Fujimoto, Kenta Tanaka, Tatsuya Mori, Isao Kezobo
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Patent number: 10322747Abstract: Vehicle state information is input, and a control amount, which is control state information, is calculated from the vehicle state information to control a controlled device. A control state is monitored by a monitor unit, and an abnormality is detected based on a state where the vehicle state information or the control state information exists in an abnormality region in which the vehicle state information or the control state information has not reached a failure region corresponding to a failure. The vehicle state information, the control state information, and monitor information are stored in a buffer for a period set in advance while always updating the latest vehicle state information, control state information, and monitor information. When the abnormality is detected, the above respective information before and after the abnormality detection including the information stored in the buffer are stored in a nonvolatile storage unit.Type: GrantFiled: November 26, 2014Date of Patent: June 18, 2019Assignee: Mitsubishi Electric CorporationInventors: Chiaki Fujimoto, Tomoya Itsuji
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Patent number: 10298162Abstract: Disclosed is a brushless-motor drive apparatus provided with: a current detecting means (6) for detecting currents flowing through armature windings (9) during periods when switching elements (5H, 5L) of a drive circuit are ON; a calculation processing means for comparing a target current value and the detected current value, and calculating voltage command values to be applied to the armature windings (9); and a PWM driving means (4) for controlling the ON/OFF of the switching elements on the basis of the voltage command values.Type: GrantFiled: May 14, 2010Date of Patent: May 21, 2019Assignee: Mitsubishi Electric CorporationInventors: Chiaki Fujimoto, Masahiro Kimata
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Publication number: 20180323613Abstract: A control unit of an electric motor control device includes an inverter circuit 6 that supplies power to an electric motor, a current control unit that outputs a voltage command value as a drive command of the inverter circuit, a current detecting unit that detects current flowing to each phase of the electric motor, and a failed phase identifying unit that identifies a location of a failure in the current detecting unit. The failed phase identifying unit determines whether or not a magnitude or a phase of a frequency component of the test voltage command included in a detected current value when the inverter circuit is driven with a test voltage command having a frequency higher than a rotational frequency of the electric motor as a drive command is within a predetermined range, and determines that a failure has occurred in a phase that is not within the predetermined range.Type: ApplicationFiled: January 14, 2016Publication date: November 8, 2018Applicant: Mitsubishi Electric CorporationInventors: Chiaki FUJIMOTO, Kenta TANAKA, Tatsuya MORI, Isao KEZOBO
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Publication number: 20170233000Abstract: Vehicle state information is input, and a control amount, which is control state information, is calculated from the vehicle state information to control a controlled device. A control state is monitored by a monitor unit, and an abnormality is detected based on a state where the vehicle state information or the control state information exists in an abnormality region in which the vehicle state information or the control state information has not reached a failure region corresponding to a failure. The vehicle state information, the control state information, and monitor information are stored in a buffer for a period set in advance while always updating the latest vehicle state information, control state information, and monitor information. When the abnormality is detected, the above respective information before and after the abnormality detection including the information stored in the buffer are stored in a nonvolatile storage unit.Type: ApplicationFiled: November 26, 2014Publication date: August 17, 2017Applicant: Mitsubishi Electric CorporationInventors: Chiaki FUJIMOTO, Tomoya ITSUJI
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Patent number: 9410792Abstract: A resolver device (14) includes: a microcomputer (1) for outputting a control signal for driving a motor (4) to a drive circuit (3); a sensor section (5) (resolver) for outputting detection values (a sine signal and a cosine signal) in accordance with a rotation angle of the motor (4); and a signal circuit (13) provided between the microcomputer (1) and the sensor section (5). The microcomputer (1) determines an abnormality when the detection values of the sensor section (5) are out of a first normal range and then determines return of the sensor section (5) to normal when the detection value is present within a second normal range and in a plurality of regions obtained by dividing the first normal range.Type: GrantFiled: April 12, 2012Date of Patent: August 9, 2016Assignee: Mitsubishi Electric CorporationInventors: Takayuki Yamamoto, Shunichi Wada, Katsuya Ikemoto, Chiaki Fujimoto
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Patent number: 9065364Abstract: An object is to provide a specific achievement means for achieving reliable failure determination in a control system in a motor control device. The motor control device includes motor drive means for supplying a motor current to a motor; motor current detection means for detecting the motor current; and a controller to which a motor current detection value from the motor current detection means is input, and which outputs a drive signal to the motor drive means, in which the controller includes voltage control means for controlling a voltage applied to the motor; power supply voltage detection means; means for limiting the maximum value (%) of a drive duty ratio in a PWM circuit to a smaller value, upon determining power supply voltage drop; and failure determination means for determining a failure in a case of an abnormal motor current value.Type: GrantFiled: May 26, 2011Date of Patent: June 23, 2015Assignee: Mitsubishi Electric CorporationInventors: Katsuya Ikemoto, Chiaki Fujimoto, Shunichi Wada
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Publication number: 20140375241Abstract: A resolver device (14) includes: a microcomputer (1) for outputting a control signal for driving a motor (4) to a drive circuit (3); a sensor section (5) (resolver) for outputting detection values (a sine signal and a cosine signal) in accordance with a rotation angle of the motor (4); and a signal circuit (13) provided between the microcomputer (1) and the sensor section (5). The microcomputer (1) determines an abnormality when the detection values of the sensor section (5) are out of a first normal range and then determines return of the sensor section (5) to normal when the detection value is present within a second normal range and in a plurality of regions obtained by dividing the first normal range.Type: ApplicationFiled: April 12, 2012Publication date: December 25, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takayuki Yamamoto, Shunichi Wada, Katsuya Ikemoto, Chiaki Fujimoto
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Patent number: 8895521Abstract: Pharmaceutical compositions are disclosed that are of use for the treatment of uveitis. These compositions include a suppressive oligonucleotide. These compositions including an immunosuppressive oligonucleotide can be used for the treatment of uveitis, including anterior, posterior, and diffuse uveitis.Type: GrantFiled: May 5, 2005Date of Patent: November 25, 2014Assignee: The United States of America as represented by the Secretary of the Department of Health and Human ServicesInventors: Dennis M. Klinman, Igal Gery, Chiaki Fujimoto
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Publication number: 20130307448Abstract: An object is to provide a specific achievement means for achieving reliable failure determination in a control system in a motor control device. The motor control device includes motor drive means for supplying a motor current to a motor; motor current detection means for detecting the motor current; and a controller to which a motor current detection value from the motor current detection means is input, and which outputs a drive signal to the motor drive means, in which the controller includes voltage control means for controlling a voltage applied to the motor; power supply voltage detection means; means for limiting the maximum value (%) of a drive duty ratio in a PWM circuit to a smaller value, upon determining power supply voltage drop; and failure determination means for determining a failure in a case of an abnormal motor current value.Type: ApplicationFiled: May 26, 2011Publication date: November 21, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Katsuya Ikemoto, Chiaki Fujimoto, Shunichi Wada
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Patent number: 8478485Abstract: An electric power steering apparatus is configured in such a way as to include a first filtering unit that applies filtering processing to the detected steering torque signal and outputs the processed torque signal; a control unit that generates and outputs a motor drive signal, based on a steering torque signal outputted from a first filtering unit; a second filtering unit that applies filtering processing to the detected steering torque signal and outputs the processed torque signal; and an interlock unit that generates and outputs a motor drive inhibition signal, based on the steering torque signal outputted from the second filtering unit. The second filtering unit performs filtering processing in such a way as to output a steering torque signal the same as or similar to the steering torque signal that is outputted from the first filtering unit at least when a vehicle is in a predetermined driving condition.Type: GrantFiled: December 18, 2008Date of Patent: July 2, 2013Assignee: Mitsubishi Electric CorporationInventors: Hiroshi Nishimura, Chiaki Fujimoto, Mamoru Shiraki
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Publication number: 20130026960Abstract: Disclosed is a brushless-motor drive apparatus provided with: a current detecting means (6) for detecting currents flowing through armature windings (9) during periods when switching elements (5H, 5L) of a drive circuit are ON; a calculation processing means for comparing a target current value and the detected current value, and calculating voltage command values to be applied to the armature windings (9); and a PWM driving means (4) for controlling the ON/OFF of the switching elements on the basis of the voltage command values.Type: ApplicationFiled: May 14, 2010Publication date: January 31, 2013Applicant: Mitsubishi Electric CorporationInventors: Chiaki Fujimoto, Masahiro Kimata
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Patent number: 8232752Abstract: An electric motor control apparatus that can quickly and accurately locate a short-circuit fault point. The electric motor control apparatus includes: a current controller determining respective phase voltage commands according to currents flowing in respective phases of an electric motor and a torque current command; a switching element drive circuit instructing, based on the respective phase voltage commands, an inverter to perform a switching operation; the inverter receiving a switching operation signal to drive the electric motor; current detectors disposed in series with the switching elements in the respective phases of the inverter; and a short-circuit point locating mechanism storing a test pattern indicative of a predetermined combination for turning on the switching elements of the inverter, and locating a short-circuit fault point based on the test pattern and current detection values in the respective phases detected by the current detectors in response to the test pattern.Type: GrantFiled: April 16, 2007Date of Patent: July 31, 2012Assignee: Mitsubishi Electric CorporationInventors: Isao Kezobo, Masahiro Kimata, Takayuki Kifuku, Kazumichi Tsutsumi, Chiaki Fujimoto, Noriyuki Inoue