Patents by Inventor Yoshinari Asano
Yoshinari Asano 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: 20200332166Abstract: A refrigeration cycle apparatus (1) is capable of performing a refrigeration cycle using a small-GWP refrigerant. The refrigeration cycle apparatus (1) includes a refrigerant circuit (10) and a refrigerant enclosed in the refrigerant circuit (10). The refrigerant circuit includes a compressor (21), a condenser (23), a decompressing section (24), and an evaporator (31). The refrigerant contains at least 1,2-difluoroethylene.Type: ApplicationFiled: December 18, 2018Publication date: October 22, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Eiji KUMAKURA, Takuro YAMADA, Atsushi YOSHIMI, Ikuhiro IWATA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Tatsuya TAKAKUWA, Yuzo KOMATSU, Shun OHKUBO, Keisuke OHTSUKA, Yoshinari ASANO, Keiji AOTA, Yuuichi YANAGI, Yoshikazu NAKAO, Takeo ABE, Yumi TODA, Tetsushi TSUDA
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Publication number: 20200326110Abstract: High efficiency of a compressor that compresses a mixed refrigerant containing at least 1,2-difluoroethylene is achieved. A compressor (100) includes a motor (70) that has a rotor (71) including permanent magnets (712) and thus is suitable for a variable capacity compressor in which the number of rotations of the motor can be changed. In this case, it is possible to change the number of rotations of the motor in accordance with an air conditioning load in an air conditioner (1) that uses a mixed refrigerant containing at least 1,2-difluoroechylene. It is thus possible to enable high efficiency of the compressor (100).Type: ApplicationFiled: June 26, 2020Publication date: October 15, 2020Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yoshinari ASANO, Keiji AOTA, Mitsushi ITANO, Daisuke KARUBE, Yuuki YOTSUMOTO, Kazuhiro TAKAHASHI, Yuzo KOMATSU, Shun OHKUBO, Tatsuya TAKAKUWA, Tetsushi TSUDA
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Patent number: 10693334Abstract: A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. The armature windings are configured by a first winding and at least one second winding. The field winding passes over the permanent magnet. The second windings each have a part embedded between a coil end of the field winding and teeth around which the field winding is around.Type: GrantFiled: April 12, 2018Date of Patent: June 23, 2020Assignees: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGYInventors: Yoshinari Asano, Toshinari Kondou, Yoshihito Sanga, Takashi Kosaka
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Patent number: 10686351Abstract: Disclosed herein is a method for manufacturing a rotor, the method including an injection process of injecting a bonded magnet material into a cavity of a molding die generating a magnetic field in the cavity so that the bonded magnet material is poured into each of the magnet slots in the rotor core set in the cavity through one of openings of each magnet slot, wherein the molding die used in the injection process has gates which respectively open at positions corresponding to regions, each of which ensures a view from the one of openings to the other opening of the magnet slot along an axial center of the rotor core.Type: GrantFiled: June 3, 2016Date of Patent: June 16, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yoshitaka Okuyama, Yoshiki Yasuda, Yoshinari Asano
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Publication number: 20200119630Abstract: A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. Field windings face to the permanent magnets directly or via the stator core on the outer and inner circumferential sides. A coil end of one of the armature windings straddles the predetermined one of the field slots and passes over the axial end face of each of the permanent magnets in the corresponding one of the field slots over which the coil end straddles.Type: ApplicationFiled: December 20, 2017Publication date: April 16, 2020Applicants: Daikin Industries, Ltd., Nagoya Institute of TechnologyInventors: Yoshinari ASANO, Toshinari KONDOU, Yoshihito SANGA, Yoshifumi MAEDA, Takashi KOSAKA
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Patent number: 10566859Abstract: A rotor includes a rotor core and a bond magnet. The rotor core has core blocks and a partition core sandwiched between the core blocks in an axial direction. Magnet holes pass through the core blocks and the partition core in the axial direction, respectively, and the magnet hole is communicated with the magnet holes. Positions of the magnet holes in a circumferential direction are deviated from each other. The bond magnet fills the magnet holes.Type: GrantFiled: September 27, 2016Date of Patent: February 18, 2020Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Yoshinari Asano, Yoshiki Yasuda, Masaki Hirano
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Publication number: 20200036251Abstract: A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. The armature windings are configured by a first winding and at least one second winding. The field winding passes over the permanent magnet. The second windings each have a part embedded between a coil end of the field winding and teeth around which the field winding is around.Type: ApplicationFiled: April 12, 2018Publication date: January 30, 2020Applicants: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGYInventors: Yoshinari ASANO, Toshinari KONDOU, Yoshihito SANGA, Takashi KOSAKA
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Patent number: 10348174Abstract: An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.Type: GrantFiled: June 19, 2015Date of Patent: July 9, 2019Assignees: Daikin Industries, Ltd., Nagoya Institute of TechnologyInventors: Yoshinari Asano, Takashi Kosaka
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Patent number: 10277100Abstract: A stator core and a rotor core are provided. The stator core includes field windings receiving a direct current, and armature windings receiving an alternating current. Permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings, are provided. The field windings are provided on both of inner and outer circumferential sides of the permanent magnets.Type: GrantFiled: August 29, 2016Date of Patent: April 30, 2019Assignees: Daikin Industries, Ltd., Nagoya Institute of TechnologyInventors: Yoshinari Asano, Takashi Kosaka
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Publication number: 20190058381Abstract: A stator core and a rotor core are provided. The stator core includes field windings receiving a direct current, and armature windings receiving an alternating current. Permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings, are provided. The field windings are provided on both of inner and outer circumferential sides of the permanent magnets.Type: ApplicationFiled: August 29, 2016Publication date: February 21, 2019Applicants: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGYInventors: Yoshinari ASANO, Takashi KOSAKA
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Patent number: 10122231Abstract: Each of permanent magnets includes a magnet body formed across the radial direction of a rotor core, and a pair of magnet end parts bending toward the outer peripheral side of the magnet body and extending respectively from both ends of the magnet body in the peripheral direction toward the outer edge of the rotor core. Magnetization directions of the magnet end parts and a magnetic pole center line intersect with each other on the outer peripheral side of the magnet body. The inclination angle of each magnetization direction of the magnet end parts with respect to the magnetic pole center line is greater than the inclination angle of a magnetization direction of the magnet body with respect to the magnetic pole center line.Type: GrantFiled: September 30, 2013Date of Patent: November 6, 2018Assignee: DAIKIN INDUSTRIES, LTD.Inventors: Nobuyuki Kifuji, Yoshiki Yasuda, Yoshinari Asano, Yasuhiko Ohsawa
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Publication number: 20180212497Abstract: Disclosed herein is a method for manufacturing a rotor, the method including an injection process of injecting a bonded magnet material into a cavity of a molding die generating a magnetic field in the cavity so that the bonded magnet material is poured into each of the magnet slots in the rotor core set in the cavity through one of openings of each magnet slot, wherein the molding die used in the injection process has gates which respectively open at positions corresponding to regions, each of which ensures a view from the one of openings to the other opening of the magnet slot along an axial center of the rotor core.Type: ApplicationFiled: June 3, 2016Publication date: July 26, 2018Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yoshitaka OKUYAMA, Yoshiki YASUDA, Yoshinari ASANO
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Publication number: 20180183285Abstract: A rotor includes a rotor core and a bond magnet. The rotor core has core blocks and a partition core sandwiched between the core blocks in an axial direction. Magnet holes pass through the core blocks and the partition core in the axial direction, respectively, and the magnet hole is communicated with the magnet holes. Positions of the magnet holes in a circumferential direction are deviated from each other. The bond magnet fills the magnet holes.Type: ApplicationFiled: September 27, 2016Publication date: June 28, 2018Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Yoshinari ASANO, Yoshiki YASUDA, Masaki HIRANO
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Patent number: 9923424Abstract: A radial gap type rotating electrical machine includes a field and an armature. The field includes a permanent magnet and a magnetic ring which serves as a back yoke of the permanent magnet. The magnetic ring is provided at a position farther from the armature than the permanent magnet, and includes a recess at a magnetic pole center. The magnetic pole center is a center of a magnetic pole in a circumferential direction with respect to a rotation axis. A thickness of the recess in the radial direction around the rotation axis as a center comes to locally thin.Type: GrantFiled: July 12, 2013Date of Patent: March 20, 2018Assignee: Daikin Industries, Ltd.Inventors: Shin Nakamasu, Yoshinari Asano
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Publication number: 20170250594Abstract: An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.Type: ApplicationFiled: June 19, 2015Publication date: August 31, 2017Inventors: Yoshinari ASANO, Takashi KOSAKA
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Publication number: 20150372547Abstract: Each of permanent magnets includes a magnet body formed across the radial direction of a rotor core, and a pair of magnet end parts bending toward the outer peripheral side of the magnet body and extending respectively from both ends of the magnet body in the peripheral direction toward the outer edge of the rotor core. Magnetization directions of the magnet end parts and a magnetic pole center line intersect with each other on the outer peripheral side of the magnet body. The inclination angle of each magnetization direction of the magnet end parts with respect to the magnetic pole center line is greater than the inclination angle of a magnetization direction of the magnet body with respect to the magnetic pole center line.Type: ApplicationFiled: September 30, 2013Publication date: December 24, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Nobuyuki KIFUJI, Yoshiki YASUDA, Yoshinari ASANO, Yasuhiko OHSAWA
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Publication number: 20150236557Abstract: A radial gap type rotating electrical machine includes a field and an armature. The field includes a permanent magnet and a magnetic ring which serves as a back yoke of the permanent magnet. The magnetic ring is provided at a position farther from the armature than the permanent magnet, and includes a recess at a magnetic pole center. The magnetic pole center is a center of a magnetic pole in a circumferential direction with respect to a rotation axis. A thickness of the recess in the radial direction around the rotation axis as a center comes to locally thin.Type: ApplicationFiled: July 12, 2013Publication date: August 20, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Shin Nakamasu, Yoshinari Asano
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Publication number: 20150171680Abstract: A field element has permanent magnets embedded in a core and extending in the axial direction parallel to a rotation axis. Both a magnetic pole face of the permanent magnet close to an armature and a magnetic pole face away from the armature show arcs concaved toward an armature side. A radius of an arc shown by the magnetic pole face away from the armature is larger than a radius of an arc shown by the magnetic pole face close to the armature. Further, a focal point of the arc shown by the magnetic pole face away from the armature is further away from the permanent magnet than a focal point of the arc shown by the magnetic pole face close to the armature. Also, the focal points and the rotation axis are arranged on one straight line as viewed from the axial direction.Type: ApplicationFiled: June 12, 2013Publication date: June 18, 2015Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Nobuyuki Kifuji, Yoshinari Asano, Shintarou Araki
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Patent number: 8736135Abstract: Teeth are arranged annularly around a rotation axis. The yoke has through holes. The through holes open in a radial direction around the rotation axis and in an axial direction along the rotation axis. The teeth are inserted through the through holes. A metal plate is arranged to face the yoke in the axial direction. A reinforcing plate is fixed to the teeth.Type: GrantFiled: February 24, 2010Date of Patent: May 27, 2014Assignee: Daikin Industries, Ltd.Inventors: Yoshinari Asano, Nobuyuki Kifuji, Tomonori Kikuno, Shin Nakamasu, Ryuuji Yasumoto
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Patent number: 8616016Abstract: At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.Type: GrantFiled: June 8, 2009Date of Patent: December 31, 2013Assignee: Daikin Industries, Ltd.Inventors: Yoshinari Asano, Tomomi Sakamoto, Nobuyuki Kifuji, Hirofumi Higashi, Shintarou Araki