Patents by Inventor Kenji Ogawa
Kenji Ogawa 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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Publication number: 20150326151Abstract: Provided is a motor control device that includes an inverter circuit that includes a plurality of P-side switching elements and a plurality of N-side switching elements and drives a motor via a plurality of motor terminals; a first dynamic brake that brakes the motor by turning on all the phases of the plurality of P-side switching elements or turning on all the phases of the plurality of N-side switching elements; a second dynamic brake that brakes the motor by connecting dynamic brake resistors between the motor terminals; and a control unit that switches, according to the motor speed, between the first dynamic brake and the second dynamic brake, which are the dynamic brakes that brake the motor.Type: ApplicationFiled: December 13, 2012Publication date: November 12, 2015Applicant: Mitsubishi Electric CorporationInventor: Kenji OGAWA
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Patent number: 9110451Abstract: Each of a host controller and a motor control apparatus included in a motor control system that drives a motor includes a step of determining, with respect to motor rotation state estimation information estimated based on an electric current and a voltage to the motor, whether an operation state of the motor is normal according to what kind of a relation an operation command output by the host controller and a detected motor position or motor speed have.Type: GrantFiled: November 11, 2010Date of Patent: August 18, 2015Assignee: Mitsubishi Electric CorporationInventor: Kenji Ogawa
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Patent number: 9053746Abstract: A disk device includes a recording medium having a plurality of recording surfaces, where each of the recording surfaces includes a system region for recording system data related to an operation of the disk device, and a controller configured to control recording of the system data in the system region. The controller is further configured to divide the system data to be recorded into a plurality of portions of divided data of the same size. The controller is further configured, after recording of a first portion of divided data in a first system region disposed on a first recording surface, to start recording a second portion of divided data in a second system region disposed on a second recording surface. The recording of the second portion of divided data is started after a switching time, during which switching from the first recording surface to the second recording surface transpires.Type: GrantFiled: February 26, 2014Date of Patent: June 9, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Kenji Ogawa, Hidekazu Masuyama, Michio Yamamoto, Katsushi Ohta, Yuji Karakawa
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Patent number: 9043090Abstract: An automatic steering apparatus that can suppress steering wheel vibration and that can also smooth angular control. In the automatic steering apparatus, a motor that steers steered wheels is controlled by a control unit. Information from an angle sensor that generates a signal that corresponds to a steering angle of the steered wheels is sent to the control unit. The control unit corrects a target steering angle of the steered wheels such that angular acceleration of the target steering angle is less than or equal to a limiting value. The control unit controls the motor such that the steering angle of the steered wheels tracks the corrected target steering angle based on the information from the angle sensor.Type: GrantFiled: May 18, 2011Date of Patent: May 26, 2015Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Masaya Endo, Masahiko Kurishige, Kenji Ogawa, Takayuki Kifuku, Hiroyuki Kozuki
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Publication number: 20150114953Abstract: In order to provide an induction heating cooking device in which a supporting configuration of a heating coil unit is simple and can be easily assembled, and which can accurately and constantly maintain a distance between a top plate and heating coils, opposite side surfaces of a framework laid out below the top plate are configured to have first vertical parts, first horizontal parts, and second vertical parts. A heating coil supporting member that supports the heating coils is disposed to be bridged between the first horizontal parts of the opposite side surfaces of the framework, and the heating coil unit having the heating coil is configured to be securely supported by the first horizontal parts.Type: ApplicationFiled: March 10, 2014Publication date: April 30, 2015Inventors: Hidekazu Suzuki, Tomoya Takahashi, Kenji Ogawa, Hiroshi Isago, Shumpei Ando, Masahiro Yokono, Ryuuji Nagata, Katsuyuki Aihara, Shozo Ushio
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Publication number: 20150085394Abstract: A disk device includes a recording medium having a plurality of recording surfaces, where each of the recording surfaces includes a system region for recording system data related to an operation of the disk device, and a controller configured to control recording of the system data in the system region. The controller is further configured to divide the system data to be recorded into a plurality of portions of divided data of the same size. The controller is further configured, after recording of a first portion of divided data in a first system region disposed on a first recording surface, to start recording a second portion of divided data in a second system region disposed on a second recording surface. The recording of the second portion of divided data is started after a switching time, during which switching from the first recording surface to the second recording surface transpires.Type: ApplicationFiled: February 26, 2014Publication date: March 26, 2015Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kenji OGAWA, Hidekazu MASUYAMA, Michio YAMAMOTO, Katsushi OHTA, Yuji KARAKAWA
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Patent number: 8879192Abstract: An information recording device includes a recording medium that includes a data area, and a controller that controls recording of data on the recording medium, wherein in response to a request for execution of formatting of the data area of the recording medium, the controller does not record data for the formatting in the data area and records format information about the formatting in a nonvolatile recording area that is different from the data area.Type: GrantFiled: February 25, 2014Date of Patent: November 4, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Nobuhiro Sugawara, Hidekazu Masuyama, Hironori Kanno, Kenji Ogawa, Tetsuo Kuribayashi, Seiji Toda
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Patent number: 8605013Abstract: Provided to stabilize generation of address discharge and improve gradation characteristics of display images are the following elements: a plasma display panel; a sustain pulse generating circuit; and a ramp voltage generating circuit including a first ramp voltage generating circuit, a second ramp voltage generating circuit, and a switching circuit. The first ramp voltage generating circuit generates a first ramp voltage gently increasing in an initializing period. The second ramp voltage generating circuit generates a second ramp voltage increasing with a gradient gentler than that of the rising edge of a sustain pulse and steeper than that of the first ramp voltage, at the end of each sustain period. The switching circuit stops the operation of the second ramp voltage generating circuit immediately after the second ramp voltage reaches a predetermined electric potential. In at least one sustain period of one field, no sustain pulse but the second ramp voltage is generated.Type: GrantFiled: June 12, 2008Date of Patent: December 10, 2013Assignee: Panasonic CorporationInventors: Shinichiro Hashimoto, Kenji Ogawa, Shunsuke Kawai
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Publication number: 20130322038Abstract: An antenna includes two elements having an antenna element which resonates by a frequency f1 and a ground wire element which resonates by a frequency f2 higher than the frequency f1. The antenna element is directed so that an antenna radiation part is located to be substantially parallel to a surface of a casing on which an operating part is provided. The ground wire element is directed so that a ground wire radiation part is located substantially vertically to the surface of the casing on which the operating part is provided. Further, a space between a feeding terminal connecting part of the antenna element and a ground terminal connecting part of the ground wire element is set to be equal to a space between a feeding terminal and a ground terminal and the feeding terminal connecting part is arranged to be parallel to the ground terminal connecting part.Type: ApplicationFiled: February 16, 2012Publication date: December 5, 2013Applicant: PANASONIC CORPORATIONInventors: Kenji Ogawa, Yoshio Koyanagi, Kouta Aoki
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Patent number: 8571757Abstract: In a steering apparatus for a vehicle which has a steering mechanism for steering steerable road wheels by means of a steering wheel operated by a driver and an electrically controllable auxiliary steering angle superposition mechanism, and in which a target auxiliary steering angle is set in accordance with a steering wheel angle, and an electric motor of the auxiliary steering angle superposition mechanism is driven and controlled according to the target auxiliary steering angle, the rotation of the electric motor 212 is inhibited without regard to the state of the driving control. A short-circuit relay 13 is provided for short-circuiting opposite terminals of the electric motor 212, and the short-circuit relay 13 is operated so as to short-circuit the opposite terminals of the electric motor 212 through a short-circuit relay driving unit 14 in accordance with the kind of a failure detected by a failure detection unit 18, whereby the rotation of the electric motor 212 is inhibited.Type: GrantFiled: May 30, 2007Date of Patent: October 29, 2013Assignee: Mitsubishi Electric CorporationInventors: Kenji Ogawa, Masafumi Okazaki, Masayoshi Yamamoto
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Publication number: 20130206444Abstract: For providing an electric connection box including a metal core board, which can limit increase of a size thereof and be prevented from bending along the slit, the electric connection box 10 includes a metal core board 1, in which a plurality of core metal plates 21, 22 is laminated and insulation resin is filled between each of the plurality of core metal plates 21, 22. The plurality of core metal plates 21, 22 are provide with slits 3A, 3B to divide the core metal plates 21, 22 to a plurality of separate plates 21a, 21b, 22a, 22b and be filled with insulation resin. The slits 3A, 3B is formed not to overlap each other on the same one line when viewing in a vertical direction about the metal core board 1. The electric connection box 10 distributes electric power inputted from a plurality of power systems to each separate plates 21a, 21b, 22a, 22b.Type: ApplicationFiled: October 20, 2011Publication date: August 15, 2013Applicant: Yazaki CorporationInventors: Manabu Ooishi, Maki Sugiura, Kazuhiro Yamamoto, Kenji Ogawa
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Publication number: 20130194725Abstract: An electrical junction box for distributing electric power in a vehicle includes: a metal core substrate 1 provided with a core metal assembly having two core metal plates arranged with a gap, and an insulating layer embedded in the gap and covering surfaces of the metal core plates to integrate the metal core plates; and electronic components. Electric power from a battery is inputted into the core metal plate, and electric power from an alternator is inputted into the core metal plate. The electronic components are provided with a plurality of attaching portions soldered or screwed to the metal core substrate. At least one of the attaching portions is attached to the core metal plate, and at least one of the attaching portions is attached to the core metal plate.Type: ApplicationFiled: October 20, 2011Publication date: August 1, 2013Applicant: YAZAKI CORPORATIONInventors: Manabu Ooishi, Maki Sugiura, Kazuhiro Yamamoto, Kenji Ogawa
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Patent number: 8497402Abstract: Provided is a process and an apparatus for producing at low cost gas hydrate pellets having an excellent storability. A gas hydrate generated from a raw-material gas and raw-material water is dewatered and simultaneously molded into pellets with compression-molding means under conditions suitable for generating the gas hydrate while the gas hydrate is generated from the raw-material gas and the raw-material water that exist among particles of the gas hydrate.Type: GrantFiled: July 25, 2012Date of Patent: July 30, 2013Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.Inventors: Toru Iwasaki, Masahiro Takahashi, Takashi Arai, Shinji Takahashi, Kouhei Takamoto, Kenji Ogawa, Masafumi Aoba
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Publication number: 20130154538Abstract: Each of a host controller and a motor control apparatus included in a motor control system that drives a motor includes a step of determining, with respect to motor rotation state estimation information estimated based on an electric current and a voltage to the motor, whether an operation state of the motor is normal according to what kind of a relation an operation command output by the host controller and a detected motor position or motor speed have.Type: ApplicationFiled: November 11, 2010Publication date: June 20, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Kenji Ogawa
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Patent number: 8405576Abstract: A sustain pulse generation circuit of a plasma display device generates and switches a first sustain pulse for causing light emission having double peaks, a second sustain pulse having a falling edge steeper than that of the first sustain pulse, and a third sustain pulse having a rising edge and a falling edge steeper than those of the first sustain pulse and causing light emission having a single peak. The second sustain pulse or the third sustain pulse is generated immediately before the third sustain pulse. The first sustain pulse is generated immediately before the second sustain pulse. Provided between the second sustain pulse and the third sustain pulse and between the third sustain pulses is a first overlap period in which a time period for causing the corresponding sustain pulse to rise is overlapped with a time period for causing the corresponding sustain pulse to fall.Type: GrantFiled: April 14, 2008Date of Patent: March 26, 2013Assignee: Panasonic CorporationInventors: Kosuke Makino, Taku Okada, Shinichiro Hashimoto, Kenji Ogawa, Shigeo Kigo
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Patent number: 8379007Abstract: A method for driving a plasma display panel that includes a plurality of discharge cells including a display electrode pair composed of a scan electrode and a sustain electrode. One field period includes a plurality of subfields each including an initializing period, an address period and a sustain period. The method includes applying at least two kinds of sustain pulses to one electrode of the scan electrode and the sustain electrode in the sustain period, the two kinds of sustain pulses including a first sustain pulse as a reference and a second sustain pulse rising more steeply and falling more gently than the first sustain pulse. In the method, a drive waveform voltage applied to the one electrode includes a last drive waveform voltage in the sustain period and a predetermined number of the second sustain pulses continuously disposed immediately before the last drive waveform voltage.Type: GrantFiled: April 9, 2008Date of Patent: February 19, 2013Assignee: Panasonic CorporationInventors: Shinichiro Hashimoto, Kenji Ogawa
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Publication number: 20130041557Abstract: An automatic steering apparatus that can suppress steering wheel vibration and that can also smooth angular control. In the automatic steering apparatus, a motor that steers steered wheels is controlled by a control unit. Information from an angle sensor that generates a signal that corresponds to a steering angle of the steered wheels is sent to the control unit. The control unit corrects a target steering angle of the steered wheels such that angular acceleration of the target steering angle is less than or equal to a limiting value. The control unit controls the motor such that the steering angle of the steered wheels tracks the corrected target steering angle based on the information from the angle sensor.Type: ApplicationFiled: May 18, 2011Publication date: February 14, 2013Applicant: Mitsubishi Electric CorporationInventors: Masaya Endo, Masahiko Kurishige, Kenji Ogawa, Takayuki Kifuku, Hiroyuki Kozuki
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Patent number: 8330367Abstract: A plasma display panel has a first substrate, plural pairs of display electrodes, a second substrate, and plural data electrodes. Each pair of the display electrodes is made up of a scanning electrode and a sustain electrode which are arranged parallel to each other on the first substrate. The second substrate is disposed opposite to the first substrate. A discharge space is formed between the first substrate and second substrate. The data electrodes are arranged in a direction perpendicular to the display electrodes on the second substrate. The data electrode is wider in peripheral portion of the second substrate than in a central portion of the second substrate.Type: GrantFiled: February 22, 2012Date of Patent: December 11, 2012Assignee: Panasonic CorporationInventors: Tomohiro Murakoso, Kenji Ogawa, Toru Ando, Kentaro Ueda, Yohei Koshio, Ryuichi Murai
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Publication number: 20120285083Abstract: Provided is a process and an apparatus for producing at low cost gas hydrate pellets having an excellent storability. A gas hydrate generated from a raw-material gas and raw-material water is dewatered and simultaneously molded into pellets with compression-molding means under conditions suitable for generating the gas hydrate while the gas hydrate is generated from the raw-material gas and the raw-material water that exist among particles of the gas hydrate.Type: ApplicationFiled: July 25, 2012Publication date: November 15, 2012Applicant: MITSUI ENGINEERING & SHIPBUILDING CO., LTD.Inventors: Toru Iwasaki, Masahiro Takahashi, Takashi Arai, Shinji Takahashi, Kouhei Takamoto, Kenji Ogawa, Masafumi Aoba
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Patent number: 8303293Abstract: Provided is a process and an apparatus for producing at low cost gas hydrate pellets having an excellent storability. A gas hydrate generated from a raw-material gas and raw-material water is dewatered and simultaneously molded into pellets with compression-molding means under conditions suitable for generating the gas hydrate while the gas hydrate is generated from the raw-material gas and the raw-material water that exist among particles of the gas hydrate.Type: GrantFiled: October 3, 2007Date of Patent: November 6, 2012Assignee: Mitsui Engineering & Shipbuilding Co., Ltd.Inventors: Toru Iwasaki, Masahiro Takahashi, Takashi Arai, Shinji Takahashi, Kouhei Takamoto, Kenji Ogawa, Masafumi Aoba