Patents by Inventor Masahiko Asai
Masahiko Asai 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: 20110116950Abstract: In an inverter-integrated electric compressor having an inverter unit integrated therein, the inverter unit is provided with a plurality of CAN (Controller Area Network) receiver circuits for CAN communications with a vehicle-side control unit, at least one of the CAN receiver circuits being a high-speed CAN receiver circuit allowing connection with a high-speed CAN bus and at least one of the other CAN receiver circuits being a low-speed CAN receiver circuit allowing connection with a low-speed CAN bus.Type: ApplicationFiled: November 13, 2009Publication date: May 19, 2011Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Kazuki Niwa, Makoto Hattori, Masahiko Asai, Toyohisa Kawashima, Takashi Nakagami, Koji Nakano
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Publication number: 20100247349Abstract: A common mode coil can be installed without having to increase the planar area for an inverter accommodating section so that high performance and size reduction and compactness of an inverter device can be achieved.Type: ApplicationFiled: November 13, 2008Publication date: September 30, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Masahiko Asai, Makoto Hattori, Hiroyuki Kamitani, Koji Nakano, Koji Toyama
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Publication number: 20100232991Abstract: In an inverter control apparatus in which a control circuit board is fixed by use of pin-like terminals provided in a power board, the breakage of the pin-like terminals is prevented. The power board 160 is provided with a plurality of signal transmission terminals 210a, 210b, 220a, 220b for signal transmission to and from the control circuit board 150 and for grounding along each of a pair of opposed sides, the control circuit board 150 is electrically connected to the plurality of signal transmission terminals 210a etc. and is fixed by soldering to the plurality of signal transmission terminals 210a etc., and the plurality of signal transmission terminals 210a etc. are arranged along each of the pair of sides in a plurality of rows.Type: ApplicationFiled: June 27, 2008Publication date: September 16, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takashi Nakagami, Shunsuke Yakushiji, Koji Nakano, Masahiko Asai, Makoto Hattori, Kazuki Niwa
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Publication number: 20100172764Abstract: There is provided an electric compressor that can protect a component to be protected from heat damage according to a capability of the component. The electric compressor 10 includes a compression mechanism 11, an electric motor 12 that drives the compression mechanism 11, and a control portion 13 that controls to drive the electric motor 12, incorporated into a single casing, and further includes a temperature detector 14 that detects a temperature of one or more components that constitute one or both of the control portion 13 and the electric motor 12, and a current detector 15 that detects a current flowing through the component.Type: ApplicationFiled: June 24, 2008Publication date: July 8, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Koji Nakano, Takashi Nakagami, Hideto Noyama, Masahiko Asai, Makoto Hattori, Takayuki Takashige
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Publication number: 20100170294Abstract: The object is to provide an integrated compressor that enables a control board to be miniaturized while ensuring a layout in which the heat radiation of parts is considered. Diodes 43 and IGBTs 42 that correspond to each of the U-phase, V-phase and W-phase are arrayed in series for each phase. Rectangular chips are used for the diodes 43 and IGBTs 42. As a result of this, a power board 16 is substantially miniaturized, and the diode 43, the IGBT 42, a P-terminal electrode pattern 40, an N-terminal electrode pattern 41, a shunt resistor 44, output terminal patterns 48U, 48V, 48W, and a feed pattern 50 are disposed so as to lie in a region in contact with an outer surface of a housing.Type: ApplicationFiled: September 8, 2008Publication date: July 8, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takashi Nakagami, Koji Nakano, Masahiko Asai, Makoto Hattori, Kazuki Niwa
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Publication number: 20100064706Abstract: There is provided a control device of a permanent-magnet type synchronous motor that sets a synchronous operation current at start-up in response to a current limiting value determined from the temperature of an inverter that supplies three-phase power to the permanent-magnet type synchronous motor, that monitors an output voltage or an output current of the inverter during a rotation stabilizing period after start-up, and that updates the synchronous operation current using this output voltage or output current.Type: ApplicationFiled: May 18, 2007Publication date: March 18, 2010Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige, Koji Nakano, Takashi Nakagami
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Publication number: 20090230902Abstract: The object is to provide an inverter system for a vehicle-mounted air conditioner capable of reducing standby power requirements during nonuse. The voltage supply from a communication power source 80 is turned on and off on the basis of a signal from a communication driver 27a and an electric switch is changed over, whereby the voltage supply from a vehicle-mounted battery power source 50 to a DC-DC converter 26 is turned on and off and the voltage supply to a motor-control microcomputer 24 and a gate circuit 22 is turned on and off. As a result of this, during nonuse the operating state of the motor-control microcomputer 24 is shifted to a sleep mode by performing control by a host ECU 60, whereby the voltage supply is suspended and it becomes possible to reduce power consumption.Type: ApplicationFiled: July 16, 2008Publication date: September 17, 2009Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Takashi Nakagami, Koji Nakano, Masahiko Asai, Makoto Hattori, Kazuki Niwa
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Patent number: 7560885Abstract: An apparatus for controlling a motor includes a plurality of switching elements configured to switch energizing phases of the motor; and a driving unit configured to drive at least one of the switching elements. The driving unit drives a predetermined switching element from among the switching elements so as to position the rotor to a predetermined position. When starting the motor, the driving unit first drives the predetermined switching element.Type: GrantFiled: September 30, 2005Date of Patent: July 14, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige
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Patent number: 7534109Abstract: A control board has a pattern for a low-voltage circuit including a ground pattern connectable to a ground and a pattern for a high-voltage circuit including a ground pattern. The patterns for the low-voltage and high-voltage circuits each have one or more ground-connection lands configured to connect the ground patterns thereof to each other via one or more capacitors.Type: GrantFiled: February 13, 2007Date of Patent: May 19, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Hattori, Masahiko Asai, Koji Toyama, Koji Nakano
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Patent number: 7473080Abstract: A compressor having an internally mounted inverter and having improved safety at low cost is provided. The compressor has a motor; a compressor mechanism driven by the motor; a first housing section having an opening and within which the motor is housed; a second housing section which is mounted on the first housing section and which closes the opening; a fixing member which fixes the second housing section to the first housing section; a controller which is provided on the first housing section and which controls the operation of the motor; a power supply section which supplies power to the controller; a protective cover which covers the controller; and a power source control apparatus which stops the supply of power to the controller by the power supply section or carries out a prescribed safety measure operation when the protective cover is removed from the controller.Type: GrantFiled: February 7, 2006Date of Patent: January 6, 2009Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Minoru Kawada, Takayuki Hagita, Makoto Hattori, Masahiko Asai, Hirofumi Hirata
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Publication number: 20080087458Abstract: A control board has a pattern for a low-voltage circuit including a ground pattern connectable to a ground and a pattern for a high-voltage circuit including a ground pattern. The patterns for the low-voltage and high-voltage circuits each have one or more ground-connection lands configured to connect the ground patterns thereof to each other via one or more capacitors.Type: ApplicationFiled: February 13, 2007Publication date: April 17, 2008Inventors: Makoto Hattori, Masahiko Asai, Koji Toyama, Koji Nakano
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Patent number: 7273357Abstract: A control device includes a shot-pulse control unit that provides, at a time of starting a synchronous motor, a predetermined current to each phase of a stator of the motor for a short time; a detecting unit that detects a current flowing through each phase when the predetermined current is provided; an estimating unit that estimates a position of the rotor by comparing detected values; a voltage control unit that controls application of a voltage to the synchronous motor based on a high-pressure side pressure of the compressor when the compressor is failed to be started due to any cause; and a magnetism-resistant section having a conductive layer sandwiched by insulating layers. The magnetism-resistant section covers a portion of a substrate of the control device, and a portion at which the conductive layer is exposed is in contact with the housing or a part conducting heat to the housing.Type: GrantFiled: February 16, 2006Date of Patent: September 25, 2007Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige, Koji Nakano, Takashi Nakagami
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Publication number: 20070035272Abstract: A control device includes a shot-pulse control unit that provides, at a time of starting a synchronous motor, a predetermined current to each phase of a stator of the motor for a short time; a detecting unit that detects a current flowing through each phase when the predetermined current is provided; an estimating unit that estimates a position of the rotor by comparing detected values; a voltage control unit that controls application of a voltage to the synchronous motor based on a high-pressure side pressure of the compressor when the compressor is failed to be started due to any cause; and a magnetism-resistant section having a conductive layer sandwiched by insulating layers. The magnetism-resistant section covers a portion of a substrate of the control device, and a portion at which the conductive layer is exposed is in contact with the housing or a part conducting heat to the housing.Type: ApplicationFiled: February 16, 2006Publication date: February 15, 2007Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige, Koji Nakano, Takashi Nakagami
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Publication number: 20060230781Abstract: A compressor having an internally mounted inverter and having improved safety at low cost is provided. The compressor has a motor; a compressor mechanism driven by the motor; a first housing section having an opening and within which the motor is housed; a second housing section which is mounted on the first housing section and which closes the opening; a fixing member which fixes the second housing section to the first housing section; a controller which is provided on the first housing section and which controls the operation of the motor; a power supply section which supplies power to the controller; a protective cover which covers the controller; and a power source control apparatus which stops the supply of power to the controller by the power supply section or carries out a prescribed safety measure operation when the protective cover is removed from the controller.Type: ApplicationFiled: February 7, 2006Publication date: October 19, 2006Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Minoru Kawada, Takayuki Hagita, Makoto Hattori, Masahiko Asai, Hirofumi Hirata
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Publication number: 20060186843Abstract: An apparatus for controlling a motor includes a plurality of switching elements configured to switch energizing phases of the motor; and a driving unit configured to drive at least one of the switching elements. The driving unit drives a predetermined switching element from among the switching elements so as to position the rotor to a predetermined position. When starting the motor, the driving unit first drives the predetermined switching element.Type: ApplicationFiled: September 30, 2005Publication date: August 24, 2006Applicant: MITUSBISHI HEAVY INDUSTRIES, LTD.Inventors: Makoto Hattori, Masahiko Asai, Takayuki Takashige
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Publication number: 20050035241Abstract: A magnetic tape drive is equipped with a travel device for running a magnetic tape and a plurality of guides for guiding the magnetic tape, which is running, along a predetermined route. Each of the guides has a roller portion and a flange portion. A surface hardening treatment is dispensed to a guide out of the guides where a ratio of a peripheral speed of the guide for a running speed of the magnetic tape is not more than 0.9.Type: ApplicationFiled: July 15, 2004Publication date: February 17, 2005Inventors: Toru Nakao, Masahiko Asai
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Patent number: 4840326Abstract: An magnetic tape cassette of the type in which the tape is wound on flangeless hubs and the tape is pulled out through an opening in the cassette for recording and reproducing having improved tape winding characteristics. An annular projection is formed around each of the flangeless hubs, and a rib having about the same height as the annular projection extends radially outwardly from the radial projection in an area corresponding to the first-wound portion of the tape. The rib keeps the tape from deviating sideways as it is initially wound onto the hub.Type: GrantFiled: January 13, 1988Date of Patent: June 20, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shingo Katagiri, Keiji Mori, Masahiko Asai