Patents by Inventor Mineo Yamamoto
Mineo Yamamoto 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: 11843296Abstract: A motor includes a stator, and includes a first substrate and a second substrate mounted on the stator. The stator has a stator core in a ring shape and a first coil of a first phase and a second coil of a second phase wound around the stator core. The first substrate includes a first power supply wiring to supply electric power to the first coil. The second substrate has a second power supply wiring to supply electric power to the second coil.Type: GrantFiled: August 4, 2016Date of Patent: December 12, 2023Assignee: Mitsubishi Electric CorporationInventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
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Publication number: 20230133289Abstract: Provided is a power control device that drives an electric motor including a rotor into which a rotary shaft is inserted and a stator, the stator being provided on an outer peripheral side of the rotor, the power control device including: a substrate having a through hole and disposed to face the rotor and the stator, the rotary shaft being caused to pass through the through hole; a power semiconductor module mounted on the substrate and including a drive circuit; and a microcomputer mounted on the substrate, and configured to control power supplied to the electric motor, wherein the substrate is integrally formed with the stator by using a molded resin, and a first part having a lower thermal conductivity than the molded resin is disposed on the substrate at a position between the power semiconductor module and the microcomputer.Type: ApplicationFiled: June 16, 2020Publication date: May 4, 2023Inventors: Junichiro OYA, Mineo YAMAMOTO, Hiroyuki ISHII, Hiroki ASO
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Patent number: 11624521Abstract: An electric motor includes a stator, a rotor, and a magnetic sensor. The stator has an iron core and a magnetic flux coil. The rotor has a rotary shaft and a cylindrical rotor magnet. The magnetic sensor has a sensor unit that outputs an electric signal based on an applied magnetic flux. The rotor magnet is disposed so as to face the iron core of the stator. The rotor magnet has a main magnet unit and a sensor magnet unit that is formed integrally with the main magnet unit and has an external diameter smaller than an external diameter of the main magnet unit. The magnetic sensor is disposed beside the sensor magnet unit. An outer circumferential edge of the sensor magnet unit is located farther away from the rotary shaft than a center of the sensor unit. The magnetic sensor is configured such that a center of the sensor unit and a center of the magnetic sensor do not match each other, and the center of the sensor unit is closer to the sensor magnet unit than the center of the magnetic sensor.Type: GrantFiled: September 11, 2017Date of Patent: April 11, 2023Assignee: Mitsubishi Electric CorporationInventors: Junichiro Oya, Mineo Yamamoto, Hiroyuki Ishii, Yuto Urabe, Takaya Shimokawa
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Publication number: 20230012990Abstract: An electric motor has a mechanism to detect an overcurrent in an inverter circuit. The electric motor includes a rotor, a stator, and a board. The board includes a power transistor, a first resistor, a second resistor, and a constant voltage diode. The power transistor is included in the inverter circuit, which is configured to change a direction of a current that flows through a winding of the stator. The first resistor is provided between the power transistor and a ground terminal, and configured to detect an overcurrent in the inverter circuit. The second resistor is provided between the power transistor and the first resistor, and configured to detect a current that flows through the winding of the stator. The constant voltage diode is connected parallel to the first resistor.Type: ApplicationFiled: February 19, 2020Publication date: January 19, 2023Inventors: Junichiro OYA, Mineo YAMAMOTO, Hiroyuki ISHII, Yuto URABE
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Patent number: 11502575Abstract: A motor includes a stator to which a substrate can be stably secured without increasing the size of the substrate. An air-conditioning apparatus includes the motor. At an end portion of the stator in the axial direction thereof, a substrate on which electronic components are mounted is provided. The stator includes: a stator core formed by stacking electromagnetic steel sheets, and including a plurality of teeth; insulators provided on the stator core; and a wire wound around the teeth, the teeth being coated with the insulators. The insulators have outer walls provided on respective core backs of the stator core.Type: GrantFiled: January 18, 2018Date of Patent: November 15, 2022Assignee: Mitsubishi Electric CorporationInventors: Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
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Patent number: 11190069Abstract: A consequent-pole-type rotor includes a first rotor core having a first insertion hole, and a second rotor core having a second insertion hole, the second rotor core being stacked on the first rotor core such that the first insertion hole and the second insertion hole together form a space accommodating a permanent magnet. The first insertion hole has an opening at a first circumferential position of the first rotor core, and the second insertion hole is occluded at least at a second circumferential position of the second rotor core. The second circumferential position corresponds to the first circumferential position.Type: GrantFiled: June 22, 2016Date of Patent: November 30, 2021Assignee: Mitsubishi Elextric CorporationInventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
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Patent number: 11063484Abstract: The rotor of the electric motor includes a rotor magnet. The rotor magnet includes a yoke, and a resin magnet part formed of a resin material containing rare-earth magnetic powder, which is disposed outside the yoke. Multiple pedestals and multiple connecting portions are formed on an end surface of the yoke. The connecting portion joins together the adjacent pedestals. The connecting portions are disposed in a middle position of the end surface in the radial direction. The connecting portions each have a height less than the height of the pedestals. The present invention gains advantage in that the amount of rare-earth magnetic powder used in the rotor magnet can be reduced.Type: GrantFiled: April 27, 2016Date of Patent: July 13, 2021Assignee: Mitsubishi Electric CorporationInventors: Mineo Yamamoto, Tomoaki Oikawa, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
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Patent number: 11031831Abstract: An electric motor includes an annular stator and a consequent-pole-type rotor including an annular rotor core disposed on the inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core, in which the stator is covered with an unsaturated polyester resin.Type: GrantFiled: April 21, 2016Date of Patent: June 8, 2021Assignee: Mitsubishi Electric CorporationInventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
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Patent number: 11005350Abstract: A permanent-magnet synchronous motor includes: an annular stator core; a cylindrical rotor disposed inside the stator core, and having a first end face in an axial direction of the stator core and a second end face in the axial direction; a disk-shaped sensor magnet having a plurality of magnetic poles disposed circumferentially, and having a third end face and a fourth end face; and a magnetic sensor disposed so as to be opposed to the fourth end face in the axial direction, and detecting a rotating position of the sensor magnet. When a first thickness means the axial thickness at the center of each of the magnetic poles and a second thickness means the axial thickness of an inter-magnetic-pole portion between adjacent magnetic poles of the magnetic poles, the second thickness is greater than the first thickness.Type: GrantFiled: September 18, 2015Date of Patent: May 11, 2021Assignee: Mitsubishi Electric CorporationInventors: Takaya Shimokawa, Kazuhiko Baba, Koji Yabe, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Hiroki Aso, Yuto Urabe
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Patent number: 10923971Abstract: A stator includes a stator core having a first tooth and a second tooth adjacent to each other, a coil having a first winding portion wound around the first tooth and a second winding portion wound around the second tooth, a spacer inserted into a gap between the first winding portion and the second winding portion, and a molding resin covering the stator core, the coil, and the spacer. The spacer is shaped from a plastic material identical with a plastic material of which the molding resin is composed.Type: GrantFiled: December 16, 2015Date of Patent: February 16, 2021Assignee: Mitsubishi Electric CorporationInventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
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Patent number: 10897174Abstract: A stator to which a power supply lead wire for supplying electric power is connected, includes a stator core, a winding wound around the stator core, a winding terminal connected to the winding, a circuit board connecting the power supply lead wire and the winding terminal to each other and having a surface facing the stator core, a power supply terminal provided on the surface and connected to the power supply lead wire, and a wiring pattern provided on the surface and connecting the winding terminal and the power supply terminal to each other.Type: GrantFiled: June 28, 2016Date of Patent: January 19, 2021Assignee: Mitsubishi Electric CorporationInventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
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Patent number: 10855134Abstract: A motor includes a rotor having a shaft, a stator provided so as to surround the rotor, a first bearing and a second bearing rotatably supporting the shaft and disposed at a distance from each other in an axial direction of the shaft, a molded resin part covering the stator and having a bearing support part supporting the first bearing, a bracket attached to the molded resin part, supporting the second bearing, and having conductivity, and a conductive member provided in contact with both of the bearing support and the bracket.Type: GrantFiled: July 4, 2016Date of Patent: December 1, 2020Assignee: Mitsubishi Electric CorporationInventors: Hiroyuki Ishii, Tomoaki Oikawa, Mineo Yamamoto, Hiroki Aso, Junichiro Oya, Yuto Urabe
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Patent number: 10855126Abstract: An electric motor includes a stator and a consequent-pole-type rotor including an annular rotor core disposed on an inner side of the stator and a plurality of permanent magnets disposed inside the rotor core and arrayed in a circumferential direction of the rotor core. The rotor core includes at least one slit provided inside the rotor core and disposed on an outer side of each of the permanent magnets in a radial direction of the rotor core, and at least one slit provided on an outer circumferential surface of the rotor core and disposed between the permanent magnets adjacent to each other.Type: GrantFiled: November 18, 2015Date of Patent: December 1, 2020Assignee: Mitsubishi Electric CorporationInventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe, Takaya Shimokawa, Koji Yabe
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Publication number: 20200373795Abstract: A motor includes a stator to which a substrate can be stably secured without increasing the size of the substrate. An air-conditioning apparatus includes the motor. At an end portion of the stator in the axial direction thereof, a substrate on which electronic components are mounted is provided. The stator includes: a stator core formed by stacking electromagnetic steel sheets, and including a plurality of teeth; insulators provided on the stator core; and a wire wound around the teeth, the teeth being coated with the insulators. The insulators have outer walls provided on respective core backs of the stator core.Type: ApplicationFiled: January 18, 2018Publication date: November 26, 2020Inventors: Mineo YAMAMOTO, Hiroyuki ISHII, Junichiro OYA, Yuto URABE
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Patent number: 10763712Abstract: A consequent-pole-type rotor including a rotor core and a permanent magnet 1 disposed inside the rotor core, includes a first rotor core having a first region into which the permanent magnet is inserted and a second rotor core that has a second region communicating with the first region and is stacked on the first rotor core, wherein a second width is larger than a first width, where the first width is a width of the first region in a radial direction of the rotor core and the second width is a width of the second region in the radial direction of the rotor core.Type: GrantFiled: August 22, 2016Date of Patent: September 1, 2020Assignee: Mitsubishi Electric CorporationInventors: Ryogo Takahashi, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe
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Patent number: 10754278Abstract: An image forming apparatus including: a fixer that fixes a toner image formed on a recording medium by pressing and heating the recording medium nipped in a nip portion formed by causing two rotating bodies to pressedly abut on each other, and conveying the recording medium by rotating the rotating bodies; a motor that drives the rotating bodies by transmitting a torque to at least one of the rotating bodies; a torque detector that detects the torque transmitted to the rotating body by the motor; a temperature detector that detects temperature of the rotating body; a speed detector that detects a conveyance speed for conveying the recording medium by the fixer; and a controller that corrects the detected torque based on at least any one of the detected temperature and the detected conveyance speed and predicts a life of the fixer based on the corrected torque.Type: GrantFiled: February 14, 2019Date of Patent: August 25, 2020Assignee: KONICA MINOLTA, INC.Inventors: Masayuki Fukunaga, Toshiaki Tanaka, Masayuki Watanabe, Mineo Yamamoto
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Publication number: 20200208859Abstract: An electric motor includes a stator, a rotor, and a magnetic sensor. The stator has an iron core and a magnetic flux coil. The rotor has a rotary shaft and a cylindrical rotor magnet. The magnetic sensor has a sensor unit that outputs an electric signal based on an applied magnetic flux. The rotor magnet is disposed so as to face the iron core of the stator. The rotor magnet has a main magnet unit and a sensor magnet unit that is formed integrally with the main magnet unit and has an external diameter smaller than an external diameter of the main magnet unit. The magnetic sensor is disposed beside the sensor magnet unit. An outer circumferential edge of the sensor magnet unit is located farther away from the rotary shaft than a center of the sensor unit. The magnetic sensor is configured such that a center of the sensor unit and a center of the magnetic sensor do not match each other, and the center of the sensor unit is closer to the sensor magnet unit than the center of the magnetic sensor.Type: ApplicationFiled: September 11, 2017Publication date: July 2, 2020Inventors: Junichiro OYA, Mineo YAMAMOTO, Hiroyuki ISHII, Yuto URABE, Takaya SHIMOKAWA
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Patent number: 10673291Abstract: A permanent-magnet electric motor includes an annular stator core, a rotor core, and a rotating-position detection sensor. In each of a plurality of magnet insertion holes formed in the rotor core, a rare-earth magnet and a ferrite magnet are disposed adjacent to each other in an axial direction of the rotor core. The rotor core has an axial length longer than an axial length of the stator core. The rare-earth magnet is disposed in each of the magnet insertion holes to be opposed to the stator core in a radial direction of the stator core. The ferrite magnet disposed in each of the magnet insertion holes is disposed between the rare-earth magnet disposed in the corresponding magnet insertion hole and the rotating-position detection sensor.Type: GrantFiled: June 17, 2015Date of Patent: June 2, 2020Assignee: Mitsubishi Electric CorporationInventors: Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Junichiro Oya, Yuto Urabe, Takaya Shimokawa
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Patent number: 10608483Abstract: A stator includes a plurality of winding sections circumferentially disposed at an equal interval; a spacer inserted into a space between the winding sections; and a resin section filling the space into which the spacer is inserted.Type: GrantFiled: August 13, 2015Date of Patent: March 31, 2020Assignee: Mitsubishi Electric CorporationInventors: Hiroki Aso, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Junichiro Oya, Yuto Urabe
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Patent number: 10601285Abstract: An object of the present invention is to obtain a wiring board that achieves both of high mounting position accuracy and high solder strength in a circumferential direction. On the wiring board, an electronic component including a plurality of pins is mounted. The wiring board includes a base substrate, a plurality of wires provided on the base substrate, a resist covering the wires, and a plurality of footprints connected to the wires and having entire surfaces exposed in openings of the resist. The pins are soldered to the footprints by reflow. In the openings of the resist, directions in which the pins are led out are parallel to directions in which the wires are led out.Type: GrantFiled: October 23, 2014Date of Patent: March 24, 2020Assignee: Mitsubishi Electric CorporationInventors: Junichiro Oya, Tomoaki Oikawa, Mineo Yamamoto, Hiroyuki Ishii, Hiroki Aso, Yuto Urabe