Patents by Inventor Yoshihito Sanga
Yoshihito Sanga 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: 11909266Abstract: A rotor includes a core and two or more ribs. The core has a through hole group that includes three or more through holes arranged in a circumferential direction. The through hole group is formed through a predetermined magnetic pole. The two or more ribs are configured as portions of the core, with each rib being interposed between adjacent through holes. A first of the ribs has a first inclination with respect to a magnetic pole centerline. A second of the ribs has a second inclination with respect to the magnetic pole centerline. The second inclination is larger than the first inclination. The magnetic pole centerline is a straight line that passes through a radial center line of the magnetic pole and an axial center of the rotor. The first rib is narrower than the second rib.Type: GrantFiled: May 14, 2021Date of Patent: February 20, 2024Assignees: Daikin Industries, Ltd., UNIVERSITY PUBLIC CORPORATION OSAKAInventors: Yoshinari Asano, Yoshihito Sanga, Masayuki Sanada, Shigeo Morimoto, Yukinori Inoue
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Publication number: 20230198325Abstract: A magnet-embedded rotating machine includes a rotor including first and second magnets, and a stator. The first magnet is radially spaced from a facing surface of the stator by a first distance or longer, and the second magnet is radially spaced from the facing surface of the stator by a second distance or longer, the second distance being longer than the first distance. Hco(A) > Hco(B), Hci(A) > Hci(B), Hco(A) > Hci(A), and {Hco(A)/Hci(A)} > {Hco(B)/Hci(B)}. Hco(A) represents a coercive force of the first magnet within a first temperature range corresponding to startup temperatures of the rotating machine. Hco(B) represents a coercive force of the first magnet within a second temperature range corresponding to steady state driving temperatures of the rotating machine. Hci(A) represents a coercive force of the second magnet within the first temperature range. Hci(B) represents a coercive force of the second magnet within the second temperature range.Type: ApplicationFiled: February 10, 2023Publication date: June 22, 2023Inventors: Yoshihito SANGA, Yoshinari ASANO
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Publication number: 20230028189Abstract: A rotary electric machine includes a rotor, and a stator facing the rotor with a predetermined gap interposed between the rotor and stator. The stator has a stator core formed in a substantially circular annular shape and provided with an armature slot and a field slot alternately arranged in a circumferential direction, an armature winding housed in the armature slot, and a field winding and a first field magnet housed in the field slot. The armature winding generates a rotating magnetic field to rotate the rotor by being supplied with an alternating current armature current. The field winding generates a field flux by being supplied with a direct current field current. The first field magnet changes a magnetic force by the field flux.Type: ApplicationFiled: September 29, 2022Publication date: January 26, 2023Inventors: Yoshinari ASANO, Yoshihito SANGA, Takashi KOSAKA, Hiroaki MATSUMORI
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Patent number: 11201529Abstract: 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: GrantFiled: December 20, 2017Date of Patent: December 14, 2021Assignees: DAIKIN INDUSTRIES, LTD., NAGOYA INSTITUTE OF TECHNOLOGYInventors: Yoshinari Asano, Toshinari Kondou, Yoshihito Sanga, Yoshifumi Maeda, Takashi Kosaka
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Publication number: 20210273503Abstract: A rotor includes a core and two or more ribs. The core has a through hole group that includes three or more through holes arranged in a circumferential direction. The through hole group is formed through a predetermined magnetic pole. The two or more ribs are configured as portions of the core, with each rib being interposed between adjacent through holes. A first of the ribs has a first inclination with respect to a magnetic pole centerline. A second of the ribs has a second inclination with respect to the magnetic pole centerline. The second inclination is larger than the first inclination. The magnetic pole centerline is a straight line that passes through a radial center line of the magnetic pole and an axial center of the rotor. The first rib is narrower than the second rib.Type: ApplicationFiled: May 14, 2021Publication date: September 2, 2021Inventors: Yoshinari ASANO, Yoshihito SANGA, Masayuki SANADA, Shigeo MORIMOTO, Yukinori INOUE
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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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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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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: 9013136Abstract: A three-phase AC motor (4) has a configuration in which a q-axis inductance is larger than a d-axis inductance by a predetermined amount or more to allow smoothing of power fluctuations due to the power supply voltage of the AC power source (3).Type: GrantFiled: September 29, 2010Date of Patent: April 21, 2015Assignee: Daikin Industries, Ltd.Inventors: Akio Yamagiwa, Toshinari Kondou, Yoshihito Sanga
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Patent number: 8598763Abstract: A field element core has a perimeter exposed around a rotation axis and a plurality of field magnet insertion holes circularly disposed around the rotation axis P. A radius between the perimeter and the rotation axis P decreases in a monotonically non-increasing manner from a pole center toward an interpole and then increases in a monotonically non-decreasing manner in a region between the pole center and the interpole in a circumferential direction.Type: GrantFiled: April 22, 2009Date of Patent: December 3, 2013Assignee: Daikin Industries, Ltd.Inventors: Keiji Aota, Yoshihito Sanga, Akio Yamagiwa
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Publication number: 20110062815Abstract: A field element core has a perimeter exposed around a rotation axis and a plurality of field magnet insertion holes circularly disposed around the rotation axis P. A radius between the perimeter and the rotation axis P decreases in a monotonically non-increasing manner from a pole center toward an interpole and then increases in a monotonically non-decreasing manner in a region between the pole center and the interpole in a circumferential direction.Type: ApplicationFiled: April 22, 2009Publication date: March 17, 2011Inventors: Keiji Aota, Yoshihito Sanga, Akio Yamagiwa
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Patent number: 6208109Abstract: When torque control is performed for suppressing speed change within one rotation using a synchronous motor (6) controlled by an inverter (5) for a load having cyclic torque changing, an arrangement is employed which includes inverter control means (8) (10) for controlling the inverter (5) so as to superpose a changing amount upon an amplitude and phase of a current waveform or voltage waveform, so that torque control is realized for reducing low speed vibration of a cyclic intermittent load with maximum efficiency condition and with practical arrangement.Type: GrantFiled: February 19, 1999Date of Patent: March 27, 2001Inventors: Hiroyuki Yamai, Nobuki Kitano, Yoshihito Sanga, Manabu Kosaka