Patents by Inventor Hiroshi Murakami

Hiroshi Murakami 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).

  • Patent number: 7902775
    Abstract: An object of the present invention is to provide a motor driving device capable of outputting an accurate rotation signal while preventing a false detection of B-EMF in a position detecting comparator. The motor driving device includes an output circuit, filter circuit, comparison circuit, current zero ampere detecting circuit, position detecting circuit, sensorless drive arithmetic operation circuit, noise reduction current waveform generating circuit, signal synthesizing circuit, and output transistor control circuit, the comparison circuit including a comparator, polarity switching portion connected to a + terminal and ? terminal of the comparator and signal switching portion, the comparator being structured to be able to set and release an offset having a predetermined voltage value set preliminarily.
    Type: Grant
    Filed: August 20, 2008
    Date of Patent: March 8, 2011
    Assignee: Renesas Electronics Corporation
    Inventors: Satoshi Narumi, Hiroshi Murakami, Toshiya Suzuki
  • Publication number: 20110050022
    Abstract: Supposing a straight line joining rotation center O of a rotor and a magnetic pole middle, that is, a middle of permanent magnets (25) to be a d-axis, and a straight line joining rotation center O and an intermediate point of mutually adjacent permanent magnets (25) to be a q-axis, mutually adjacent arcs A1 and A2 are composed such that radius R1 of arc A1 at the d-axis side is larger than radius R2 of arc A2 at the q-axis side, and that, at intersection point ? of mutual arcs A1 and A2, angle ? of tangent u of arc A2 at the q-axis side with respect to tangent t of arc A1 at the d-axis side is set by ?3 degrees???2 degrees.
    Type: Application
    Filed: March 21, 2008
    Publication date: March 3, 2011
    Applicant: Panasonic Corporation
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami, Hiroki Sato
  • Patent number: 7894081
    Abstract: The present invention relates to a component mounted to a device and provides a configuration recognizing system, etc. of a device to enable configuration information of the component to be comprehended regardless of electric connection between the component and the device. A configuration recognizing system of a device (electronic device 6, server apparatus 60) with one or a plurality of components (units 41, 42, 43 . . . 4N) mounted includes a displaying unit (tag 101, 102, 103 . . . 10N) that displays configuration information on the component and a recognizing unit (non-contact recognizing unit 12) that recognize the configuration information from the displaying unit of the component mounted to the inside of the case without contact.
    Type: Grant
    Filed: January 4, 2007
    Date of Patent: February 22, 2011
    Assignee: Fujitsu Limited
    Inventors: Jun Kawahara, Hiroshi Murakami
  • Publication number: 20110012465
    Abstract: A rotor (21) is an interior permanent magnet rotor formed of a rotor core (24) in which a plurality of permanent magnets (25) are embedded at predetermined intervals. First protruding portions (26) and second protruding portions (27) are formed on an outer peripheral face of the rotor, the first protruding portions (26) each opposing the vicinity of a central portion of each of the permanent magnets and having a substantially arc-shaped cross section protruding outward and the second protruding portions (27) each opposing the vicinity of an end portion of each of the permanent magnets and protruding outward. One first protruding portion and two second protruding portions correspond to one permanent magnet. The formation of the first and second protruding portions as described above on the outer peripheral face of the rotor makes it possible to sufficiently reduce the torque ripple and the noise caused by the distortion of air-gap magnetic flux distribution.
    Type: Application
    Filed: March 6, 2009
    Publication date: January 20, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Kiyomi Kawamura, Takashi Ogawa, Hiroshi Murakami, Yuichi Yoshikawa, Yasuyuki Yokouchi
  • Publication number: 20110004740
    Abstract: A method of setting transfer rate for information processing apparatus having a plurality of processing apparatus including a processor outputting data and connected by one or a plurality of data transfer apparatuses for transferring the data outputted from the processor, the method includes obtaining a dividing information indicating a manner of dividing the information processing apparatus into a plurality of partitions including at least one of the plurality of processing apparatuses, and setting a transfer rate of each partition for broadcasting data to all of the processors included in the plurality of processing apparatuses in each partition based on the obtained dividing information.
    Type: Application
    Filed: June 28, 2010
    Publication date: January 6, 2011
    Applicant: FUJITSU LIMITED
    Inventors: Yuuji KONNO, Hiroyuki Wada, Hiromi Fukumura, Hiroshi Murakami
  • Publication number: 20100295401
    Abstract: A motor includes a stator which includes: a stator core having an annular stator yoke, a plurality of outer teeth projecting outward from the stator yoke, and a plurality of inner teeth having the same number of teeth as the outer teeth and projecting inward from the stator yoke; and a plurality of windings wound on the stator core, and the motor includes an outer rotor confronting the outer teeth via an air gap and an inner rotor confronting the inner teeth via an air gap. The outer rotor and the inner rotor have holes for accommodating permanent magnets respectively. The permanent magnets having a rectangular shape in sectional views thereof are accommodated in the holes.
    Type: Application
    Filed: January 9, 2007
    Publication date: November 25, 2010
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Yukinori Nakagawa, Yuichi Yoshikawa, Hu Li, Masahiko Morisaki, Hiroshi Murakami
  • Publication number: 20100259126
    Abstract: A motor comprising a stator having a plurality of magnetic poles disposed in a circumferential direction along an outer periphery thereof, a rotor disposed rotatably around the outer periphery of the stator, and a magnet disposed in a circumferential direction along an inner periphery of the rotor. The stator is formed by laminating sheet-like plates. A plurality of the sheet-like plates including an outermost layer of this laminated body comprises a flat portion substantially perpendicular to the magnet, and an extended portion bent to a direction substantially parallel to the magnet. A part of the sheet-like plate having the extended portion disposed to the outermost side is formed into a thickness smaller than thicknesses of the other parts.
    Type: Application
    Filed: November 12, 2008
    Publication date: October 14, 2010
    Applicant: Panasonic Corporation
    Inventors: Yuichi Yoshikawa, Hiroshi Murakami, Atsuyoshi Koshiba, Haruki Kato, Yasuo Kunishige, Koji Kadowaki, Hiroyuki Asai
  • Publication number: 20100244616
    Abstract: A dual-rotor motor in which inner slot angle ?i is larger than outer slot angle ?o. An inner notched portion is provided on both circumferential ends of an inner head. This inner notched portion provides a broader space between the inner head and an inner rotor toward both utmost ends of the inner head. An outer notched portion is provided on both circumferential ends of an outer head. This outer notched portion provides a broader space between the outer head and the outer rotor toward both utmost ends of the outer head.
    Type: Application
    Filed: October 9, 2009
    Publication date: September 30, 2010
    Inventors: Hu Li, Yuichi Yoshikawa, Hiroshi Murakami
  • Publication number: 20100244637
    Abstract: A motor comprises a stator having a plurality of magnetic poles disposed at first predetermined intervals along an outer periphery thereof, and a rotor having a permanent magnet with poles magnetized alternately to have different polarities at second predetermined intervals and disposed rotatably around the outer periphery of the stator with a predetermined gap. The magnetic poles of the stator has extended portions formed in a manner to extend from magnetic polar bases into a direction generally parallel to the permanent magnet, and the extended portions are formed of a high-permeability magnetic steel sheet with silicon content less than 3.0 wt-%.
    Type: Application
    Filed: December 11, 2008
    Publication date: September 30, 2010
    Applicant: Panasonic Corporation
    Inventors: Yuichi Yoshikawa, Hiroshi Murakami, Atsuyoshi Koshiba, Koji Kadowaki, Haruki Kato, Yasuo Kunishige
  • Publication number: 20100240953
    Abstract: A light source device emits normal illumination light and special illumination light interchangeably at a charge-storage time of an imaging device. A DRP is reconfigurable between a normal image producing circuit and a special image producing circuit. A CPU instructs the reconfiguration of the DRP when detecting that a vertical synchronization signal from a drive circuit falls to zero level. The DRP gains an access to a configuration memory to load circuit information of the normal or special image producing circuit. According to the circuit information loaded, the DRP changes functions and interconnection of processor elements.
    Type: Application
    Filed: March 4, 2010
    Publication date: September 23, 2010
    Applicant: FUJIFILM Corporation
    Inventor: Hiroshi MURAKAMI
  • Publication number: 20100237752
    Abstract: This motor includes a stator whereupon a plurality of magnetic poles are arranged at first prescribed intervals on the outer circumference section, and a rotor which is rotatively arranged on the outer circumference of the stator by having a prescribed space in between and has permanent magnets magnetized to different polarities at second prescribed intervals. The magnetic pole of the stator forms an extending section which extends from a magnetic pole base section in a direction parallel to the permanent magnet, and the extending length of the extending section in the direction parallel to the permanent magnet is same as that of the magnetic pole base section in the direction parallel to the permanent magnet or shorter.
    Type: Application
    Filed: October 8, 2008
    Publication date: September 23, 2010
    Applicant: Panasonic Corporation
    Inventors: Yuichi Yoshikawa, Hiroshi Murakami, Atsuyoshi Koshiba, Koji Kadowaki, Haruki Kato, Yasuo Kunishige
  • Publication number: 20100239894
    Abstract: In an ECU, a coolant fan performs cooling operation such that a control DUTY value is limited by a control DUTY value according to tolerable noise level of the cooling fan based on a vehicle speed in a case in which the temperature in the high-voltage battery is lower than a predetermined limitation for highest temperature. In a case in which the temperature in the high-voltage battery is higher than the predetermined limitation for highest temperature, the cooling fan performs the cooling operation by using an energy storage device cooling operation requirement value and an IPU cooling operation requirement value such that performance in the high-voltage battery is not affected. By doing this, a temperature controlling apparatus for batteries in which it is possible to cool the battery and solve temperature difference among a plurality of batteries can be provided.
    Type: Application
    Filed: June 4, 2010
    Publication date: September 23, 2010
    Applicants: HONDA GIKEN KOGYO KABUSHIKI KAISHA, KEIHIN CORPORATION
    Inventors: Mitsunobu SAITO, Morio KAYANO, Tomohiko MAEDA, Hiroshi MURAKAMI, Kazushi OTA
  • Publication number: 20100226802
    Abstract: A fan motor includes a pair of fans axially mounted to both sides of a rotary shaft of the motor. The motor includes an inner rotor placed inside a stator wound with windings and an outer rotor placed outside the stator. The motor thus has a dual-rotor structure where the inner rotor and the outer rotor are held such that both the rotors can rotate on the rotary shaft.
    Type: Application
    Filed: March 3, 2010
    Publication date: September 9, 2010
    Applicant: Panasonic Corporation
    Inventors: Kiyomi Kawamura, Hu Li, Yuichi Yoshikawa, Hiroshi Murakami, Yasushi Kato
  • Publication number: 20100218365
    Abstract: A process of manufacturing segments, an anisotropic direction of which is continuously changed in a plane vertically by a uniform magnetic field maintained in a constant direction and a process of arranging a plurality of segments on a circumference, extruding the segments in a ring shape by rheology based on the viscous deformation of the segments, from one thrust-direction end surface of the segments, and subsequently compressing the segments from both thrust-direction end surfaces of the segments are necessarily included. A ring magnet, anisotropy of which is controlled in a continuous direction, is provided, and a source for generating a static magnetic field has energy density (BH) max?160 to 180 kJ/m3.
    Type: Application
    Filed: May 20, 2009
    Publication date: September 2, 2010
    Applicant: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Kiyomi Kawamura, Yukihiro Okada, Hiroshi Murakami
  • Publication number: 20100223488
    Abstract: A storage apparatus includes: a plurality of storage sections each of which corresponds to each of a plurality of addresses; a read pointer register that outputs a read pointer indicating an address of a storage section from which data is read; a write pointer register that outputs a write pointer indicating an address of a storage section to which data is written; a control circuit that receives first clock signals of a first frequency and second clock signals of a second frequency that is different from the first frequency, determines selection signals indicating either the first clock signals or the second clock signals on the basis of the read pointer or the write pointer for each of the plurality of storage sections, and outputs the selection signals; and selection circuits selects signals indicated by the selection signals, and outputs the selected signals.
    Type: Application
    Filed: May 14, 2010
    Publication date: September 2, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Yuuji Konno, Hiroshi Murakami
  • Patent number: 7767354
    Abstract: In an ECU, a coolant fan performs cooling operation such that a control DUTY value is limited by a control DUTY value according to tolerable noise level of the cooling fan based on a vehicle speed in a case in which the temperature in the high-voltage battery is lower than a predetermined limitation for highest temperature. In a case in which the temperature in the high-voltage battery is higher than the predetermined limitation for highest temperature, the cooling fan performs the cooling operation by using an energy storage device cooling operation requirement value and an IPU cooling operation requirement value such that performance in the high-voltage battery is not affected. By doing this, a temperature controlling apparatus for batteries in which it is possible to cool the battery and solve temperature difference among a plurality of batteries can be provided.
    Type: Grant
    Filed: December 10, 2002
    Date of Patent: August 3, 2010
    Assignees: Honda Giken Kogyo Kabushiki Kaisha, Keihin Corporation
    Inventors: Mitsunobu Saito, Morio Kayano, Tomohiko Maeda, Hiroshi Murakami, Kazushi Ota
  • Patent number: 7759833
    Abstract: A motor generally has a contradictory relation between decrease of cogging torque and increase of torque density. To overcome this problem, continuous direction control is provided for anisotropy with modification of magnetic poles so that the average absolute value of differences between M? and 90×sin [?{2?/(360/p)}] is set to be 3° or less, where M? is a direction of anisotropy with respect to a radial tangent line of a magnetic pole plane, ? is a mechanical angle, and p is the number of pole pairs.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 20, 2010
    Assignee: Panasonic Corporation
    Inventors: Fumitoshi Yamashita, Hiroshi Murakami, Yukihiro Okada, Kiyomi Kawamura
  • Publication number: 20100168380
    Abstract: The objective is to provide a novel process for synthesizing a cyclic peptide compound. It is also an objective to provide a novel cyclic peptide compound. The novel process for synthesizing a cyclic peptide compound comprises the steps of: (1) translationally synthesizing a non-cyclic peptide compound having in a molecule a functional group 1 and a functional group 2, which are a pair of functional groups capable of reacting to form a bond, and (2) cyclizing the non-cyclic peptide compound by the reaction of the functional groups 1 and 2 to form a bond. The novel cyclic peptide compound can be synthesized by the process.
    Type: Application
    Filed: March 26, 2008
    Publication date: July 1, 2010
    Applicant: THE UNIVERSITY OF TOKYO
    Inventors: Hiroaki Suga, Hiroshi Murakami, Yuki Goto, Yusuke Yamagishi, Hiroshi Ashigai, Yusuke Sako
  • Patent number: 7723877
    Abstract: A stator of a motor includes a stator core formed of a plurality of teeth and an annular yoke connecting the teeth to each other, and windings wound on the teeth. A rotor of the motor confronts the stator while supported rotatably, and includes a rotor magnet, a rotor core, and a position sensing magnet. The motor further includes a position sensor for sensing a rotational position of the rotor and a circuit board for supplying an electric current to the windings in response to the rotational position of the rotor. The rotor magnet, the rotor core, and the position sensing magnet are integrated into one unit, which is mounted on a shaft of the rotor.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: May 25, 2010
    Assignee: Panasonic Corporation
    Inventors: Hideharu Hiwaki, Hiroshi Murakami, Kiyomi Kawamura
  • Patent number: 7714474
    Abstract: In a stator core having “N” slots, a tooth-width centerline of a linear yoke and a first extension line extended horizontally from a center of rotary shaft toward the linear yoke form a first angle. Assume there are first point on the first extension line at a first distance from the center, a second extension line drawn at a second distance horizontally from the center toward the linear yoke and extended vertically toward arc-shaped yokes, and a third extension line drawn from the center toward teeth ends of the linear yokes with angle “K”. The second and third extension line intersect at a second point. A line between the first and second points intersects with the first extension line, thereby forming the first angle. In this structure, 0<a<b, and (360/2N?60/2N)°<K<(360/2N+60/2N)° are established, where “a”, “b” are the first and the second distances respectively.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: May 11, 2010
    Assignee: Panasonic Corporation
    Inventors: Yuichi Yoshikawa, Yuichi Tanabe, Hiroshi Murakami, Hideharu Hiwaki, Koji Kuyama, Akio Ando