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).

  • Patent number: 9929618
    Abstract: An inverter-integrated electric compressor for which an inverter device is integrally incorporated, with a main circuit board being housed while the four corners thereof are supported by boss parts at locations above high-voltage electrical components and semiconductor switching elements. The multiple high-voltage electrical components are arranged in parallel along one side of the main circuit board at one side of an inverter housing part, with one side of the main circuit board being supported from below by the upper surface of these components. The multiple semiconductor switching elements are arranged in parallel along the other side opposing the one side of the main circuit board, at the other side of the inverter housing part, with the other side of the main circuit board being supported from below by multiple lead terminals extending upwards.
    Type: Grant
    Filed: February 18, 2014
    Date of Patent: March 27, 2018
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Hiroyuki Kamitani, Koji Nakano
  • Patent number: 9768671
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor that has improved inverter device assemblability with respect to a housing, allows for improved productivity and reduced manufacturing costs, and allows an inverter device, and thus the electric compressor itself, to be made more compact and lightweight. Provided is an inverter-integrated electric compressor (1), wherein an inverter device (7) is provided with a resin structure (12) formed as a single unit with a housing section for high-voltage system components and a circuit board assembly section, and by assembling a power system circuit board, a control system circuit board (15), a busbar, a plurality of high-voltage system components that make up the inverter device (7), and the like onto the resin structure (12), the inverter device (7) is made into a unit (34) and this unit (34) is assembled onto and integrated with the inverter housing section (8).
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: September 19, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai
  • Patent number: 9735644
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor in which a DC power input system is simplified as a configuration for directly connecting a power source cable connector to a P-N terminal on a substrate, stress caused to the substrate can be reduced even in this case, and damage to the substrate and mounting components can be prevented. In the inverter-integrated electric compressor, a P-N terminal for inputting high-voltage DC power is provided on a main substrate of an inverter device, a power source cable can be connected by inserting a connector into the P-N terminal, the connector being provided to one end the terminal, an electrical component constituting the inverter device is placed on the opposite side of the P-N terminal to sandwich the main substrate therebetween, and the stress caused to the main substrate when the connector is inserted is borne by the electrical component.
    Type: Grant
    Filed: October 7, 2013
    Date of Patent: August 15, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Hiroyuki Kamitani
  • Patent number: 9722474
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor which, even with the connector of a power source-side cable configured to be connected directly to a P-N terminal on a circuit board, reduces the stress on the circuit board by support by a high voltage electric component and can implement this support with high precision.
    Type: Grant
    Filed: December 25, 2013
    Date of Patent: August 1, 2017
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai
  • Patent number: 9385643
    Abstract: An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive apparatus calculates a voltage pulse width at which a motor does not rotate or vibrate using a both-end voltage of a smoothing capacitor and an inductance estimation value of the motor, and applies a voltage with the voltage pulse width to the motor to calculate an inductance. Then, a rotor position is estimated using the inductances calculated for individual switching patterns. A motor current is caused to flow on the basis of the estimated rotor position to perform discharge of charge accumulated in the smoothing capacitor.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: July 5, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Hideo Nakamura, Naoki Nishikawa, Masahiko Asai, Hiroyuki Kamitani
  • Publication number: 20160111942
    Abstract: In an inverter-integrated electric compressor, a sub-board (26) divided from a main board is mounted with a communication circuit (25) and is connected to a communication harness (24) via a connector (34).
    Type: Application
    Filed: May 19, 2014
    Publication date: April 21, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Patent number: 9293969
    Abstract: The present invention has an object to provide an inverter module and an inverter integrated electric compressor capable of reliably suppressing noise interference on a control circuit board and facilitating filling with a resin gel material. Provided is an inverter module including a power system circuit board and a control circuit board (30) that are integrated through a resin case, in which an insulating through hole (47) is provided in a region between: a frame ground (42) connected to a high voltage system formed on the control circuit board (30); and a low voltage circuit (46) adjacent to the frame ground (42).
    Type: Grant
    Filed: October 6, 2011
    Date of Patent: March 22, 2016
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Publication number: 20160020680
    Abstract: In this inverter-integrated electric compressor, the circuit board of an inverter device is divided into: a main circuit board having a shape and size that can be housed within an inverter housing section; and a sub-circuit board that is electrically connected to the main circuit board. The main circuit board is affixed and installed to boss sections at at least the (four) corners, and is also affixed and supported by electrical components mounted to the circuit board. The sub-circuit board has a flaring shape from the front end side to the back end side, and is affixed and installed to boss sections at three front/back points in a space below the main circuit board to the back of a bottom section inclined downwards toward the back from the front of the inverter housing section.
    Type: Application
    Filed: March 31, 2014
    Publication date: January 21, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Publication number: 20160020664
    Abstract: An inverter-integrated electric compressor for which an inverter device is integrally incorporated, with a main circuit board being housed while the four corners thereof are supported by boss parts at locations above high-voltage electrical components and semiconductor switching elements. The multiple high-voltage electrical components are arranged in parallel along one side of the main circuit board at one side of an inverter housing part, with one side of the main circuit board being supported from below by the upper surface of these components. The multiple semiconductor switching elements are arranged in parallel along the other side opposing the one side of the main circuit board, at the other side of the inverter housing part, with the other side of the main circuit board being supported from below by multiple lead terminals extending upwards.
    Type: Application
    Filed: February 18, 2014
    Publication date: January 21, 2016
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYS TEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI, Hiroyuki KAMITANI, Koji NAKANO
  • Publication number: 20150372559
    Abstract: Provided is an inverter circuit board to which a P-N terminal is attached firmly and attached such that stress applied to the circuit board can be distributed, making it possible to prevent detachment of the P-N terminal or damage to the circuit board or any components mounted thereon. Also provided is an inverter-containing electric compressor. A P-N terminal (29) via which DC power is inputted is attached to this inverter circuit board (23), on which an inverter circuit (22) is mounted. The P-N terminal (29) is provided with the following: a pair of pins; a busbar of a prescribed length joined perpendicularly to one end of each pin; a resin molded member formed integrally with the pair of pins and the busbars; and surface-mounting terminals, soldered to the surface of the circuit board, and through-hole terminals, inserted into and soldered to through-holes (23A) in the circuit board, said terminals being provided on the pair of busbars.
    Type: Application
    Filed: February 7, 2014
    Publication date: December 24, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Publication number: 20150349613
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor which, even with the connector of a power source-side cable configured to be connected directly to a P-N terminal on a circuit board, reduces the stress on the circuit board by support by a high voltage electric component and can implement this support with high precision.
    Type: Application
    Filed: December 25, 2013
    Publication date: December 3, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Publication number: 20150340933
    Abstract: Provided is an inverter-integrated electric compressor which uses the filter circuit as the substrate to eliminate a bulbar connection, improves assembly properties of the inverter device, optimizes the substrate structure, and makes the inverter device more compact and economical. In this inverter-integrated electric compressor, the inverter device is provided with multiple high-voltage electrical components which configure a noise removal filter circuit, a power substrate on which a power element is mounted, a control substrate on which a control circuit is mounted, and a filter circuit substrate which configures the filter circuit by the multiple high-voltage electrical components being connected in a pattern and mounted thereon, wherein the high-voltage electrical components, the power substrate, the control substrate and the filter circuit substrate are configured to be so as to be unitized together and housed and arranged in an inverter housing unit.
    Type: Application
    Filed: January 8, 2014
    Publication date: November 26, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Publication number: 20150333604
    Abstract: Provided is an inverter-integrated electric compressor which comprises an inverter device having a simplified configuration, reduced size and weight, and decreased cost, and which has improved assembly properties and assembly precision, and improved productivity. In this inverter-integrated electric compressor, a P-N terminal is provided on the inverter device main substrate, and a power source-side cable can be connected to the P-N terminal by inserting a connector provided at one end; by arranging and mounting multiple high-voltage electric components on the back of the main substrate in the area where the P-N terminal is arranged, a filter circuit is provided on the main substrate. The multiple high-voltage electric components are integrally coupled via fitting units provided on the housing cases of one another and are arranged in a prescribed position on the back of the main substrate with a positioning means provided on one of the housing cases.
    Type: Application
    Filed: January 8, 2014
    Publication date: November 19, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto HATTORI, Masahiko ASAI
  • Publication number: 20150295467
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor in which a DC power input system is simplified as a configuration for directly connecting a power source cable connector to a P-N terminal on a substrate, stress caused to the substrate can be reduced even in this case, and damage to the substrate and mounting components can be prevented. In the inverter-integrated electric compressor, a P-N terminal for inputting high-voltage DC power is provided on a main substrate of an inverter device, a power source cable can be connected by inserting a connector into the P-N terminal, the connector being provided to one end the terminal, an electrical component constituting the inverter device is placed on the opposite side of the P-N terminal to sandwich the main substrate therebetween, and the stress caused to the main substrate when the connector is inserted is borne by the electrical component.
    Type: Application
    Filed: October 7, 2013
    Publication date: October 15, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Hiroyuki Kamitani
  • Publication number: 20150288258
    Abstract: The purpose of the present invention is to provide an inverter-integrated electric compressor that has improved inverter device assemblability with respect to a housing, allows for improved productivity and reduced manufacturing costs, and allows an inverter device, and thus the electric compressor itself, to be made more compact and lightweight. Provided is an inverter-integrated electric compressor (1), wherein an inverter device (7) is provided with a resin structure (12) formed as a single unit with a housing section for high-voltage system components and a circuit board assembly section, and by assembling a power system circuit board, a control system circuit board (15), a busbar, a plurality of high-voltage system components that make up the inverter device (7), and the like onto the resin structure (12), the inverter device (7) is made into a unit (34) and this unit (34) is assembled onto and integrated with the inverter housing section (8).
    Type: Application
    Filed: October 2, 2013
    Publication date: October 8, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai
  • Publication number: 20150249411
    Abstract: An object is to perform discharge of a capacitor using a motor without rotating the motor even when connected to a position sensorless motor. The motor drive apparatus calculates a voltage pulse width at which a motor does not rotate or vibrate using a both-end voltage of a smoothing capacitor and an inductance estimation value of the motor, and applies a voltage with the voltage pulse width to the motor to calculate an inductance. Then, a rotor position is estimated using the inductances calculated for individual switching patterns. A motor current is caused to flow on the basis of the estimated rotor position to perform discharge of charge accumulated in the smoothing capacitor.
    Type: Application
    Filed: October 16, 2013
    Publication date: September 3, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Hideo Nakamura, Naoki Nishikawa, Masahiko Asai, Hiroyuki Kamitani
  • Patent number: 9033715
    Abstract: Provided are an inter-board connection terminal with which electrical connection between two boards can be simplified, the operability and productivity thereof can be enhanced, and reliability of electrical connection can also be ensured, as well as an inverter and an electric compressor employing the same. An inter-board connection terminal includes a group of numerous metal terminals which is inserted, individually at both tips thereof, into through-holes in boards to electrically connect two boards, wherein paired resin linking members are provided, which have a predetermined space therebetween with respect to the group of metal terminals and which join the group of metal terminals into a single unit by linking the terminals in the form of a row at both tips thereof near the bases of portions to be inserted into the through-holes in the boards.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: May 19, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa, Hiroyuki Kamitani, Takashi Hattori
  • Publication number: 20150069878
    Abstract: An electric motor is provided with a stator core (3) configured by laminating a required number of annular electromagnetic steel sheets (5) having a plurality of tooth portions (4) around each of which a coil winding is wound, on the inner periphery side, wherein circumferential widths (B) of the tooth portion (4) in the plurality of electromagnetic steel sheets (5) which are laminated on both end. sides of the stator core (3) become gradually narrow coward the respective end portion sides, and the coil winding is directly wound around the tooth portion (4) in which shoulder portions (7) on doth sides in a circumferential direction of the tooth portion (4) which is formed by lamination of the electromagnetic steel sheets (5) are shoulder portions (7) which smoothly change so as to narrow in width in a stepwise fashion toward the respective end portions.
    Type: Application
    Filed: April 23, 2013
    Publication date: March 12, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES AUTOMOTIVE THERMAL SYSTEMS CO., LTD.
    Inventors: Makoto Hattori, Masahiko Asai, Kazuki Niwa
  • Patent number: 8952766
    Abstract: An object is to provide a control board, an inverter device, and an integrated-inverter electric compressor that are capable of improving electromagnetic compatibility (EMC property) and improving reliability against input/output of electromagnetic noise, which shows a tendency towards greater complexity and intensity. A control board to which two power systems, that is, a low-voltage power system and a high-voltage power system, are inputs, comprising a low-voltage circuit and a high-voltage circuit, and a low-voltage-side ground region and a high-voltage-side ground region that are formed in correspondence with the circuits, respectively, wherein frame ground regions are provided at a plurality of positions on the control board, and a plurality of communication line patterns connected to the low-voltage circuit are respectively connected to both the low-voltage-side ground region and the frame ground region through capacitance elements with various capacitances.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: February 10, 2015
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Makoto Hattori, Masahiko Asai
  • Patent number: 8882479
    Abstract: 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: Grant
    Filed: November 13, 2008
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masahiko Asai, Makoto Hattori, Hiroyuki Kamitani, Koji Nakano, Koji Toyama