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公开(公告)号：US20250023407A1
公开(公告)日：2025-01-16
申请号：US18900239
申请日：2024-09-27
Inventor： Yuu FU , Yusuke IRINO , Tatsuya TONARI , Takuya SAKURAGI , Masatsugu TAKEMOTO
IPC: H02K1/276
Abstract: A rotor includes a rotor core having a shaft hole, a cavity section for each magnetic pole, and a cavity. A central surface section of a radially inner wall surface of the cavity section is recessed with respect to a rotor core rotation center. The central surface section includes a vicinity of a first reference line that bisects an angle between two lines connecting the rotation center and circumferential ends of the cavity section. A side surface section of the radially inner wall surface is raised toward an intersection between a second reference line and a wall surface of the shaft hole. The side surface section extends from the central surface section to the circumferential end of the cavity section. The second reference line extends radially from the rotation center and forms an angle with the first reference line obtained by dividing 180° by a number of magnetic poles.
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公开(公告)号：US20240022132A1
公开(公告)日：2024-01-18
申请号：US18374346
申请日：2023-09-28
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takuya SAKURAGI , Yusuke IRINO
Abstract: An electric motor includes a rotor and a stator having a stator core, a suspension winding group, and an armature winding group. The stator core includes a back yoke and a plurality of teeth. The suspension winding group includes a plurality of suspension windings wound on the teeth. The suspension windings generate an electromagnetic force that supports the rotor in a non-contact manner, and generate a magnetic pole inside the stator. The armature winding group includes a plurality of armature windings wound on the teeth. The armature windings generate an electromagnetic force that rotationally drives the rotor, and generate a magnetic pole inside the stator. One of the suspension or armature winding groups includes a plurality of series winding sets with a plurality of series connected windings of a same phase. Each series winding set is connected in parallel with an other one of the series winding sets.
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公开(公告)号：US20250020379A1
公开(公告)日：2025-01-16
申请号：US18900980
申请日：2024-09-30
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Shota KURODA , Atsushi SAKAWAKI , Yusuke IRINO
Abstract: When a shaft is not supported contactlessly by a support portion, a touchdown bearing comes into contact with the shaft and supports the shaft such that the shaft is rotatable. In a starting process that is performed before the shaft is supported contactlessly by the support portion, a controller detects the rotational angle of the shaft in a state in which the shaft is in contact with the touchdown bearing.
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公开(公告)号：US20240426311A1
公开(公告)日：2024-12-26
申请号：US18823589
申请日：2024-09-03
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Hideki FUJIWARA , Harunori MIYAMURA , Yusuke IRINO
IPC: F04D29/051 , F04D17/10 , F04D29/42
Abstract: A rotary fluid machine includes a casing, a partition member that partitions a space in the casing into a first space and a second space, and a rotary shaft provided in the casing. The rotary shaft is rotatably supported. The partition member includes a thrust magnetic bearing that supports the rotary shaft in an axial direction.
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公开(公告)号：US20240006958A1
公开(公告)日：2024-01-04
申请号：US18369519
申请日：2023-09-18
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yusuke IRINO , Yuu FU , Yuji NAKAZAWA
CPC classification number: H02K7/09 , F25B31/026
Abstract: An electric motor system includes a drive shaft configured to rotationally drive a load, a bearingless motor and a radial magnetic bearing arranged side by side in an axial direction of the drive shaft, and a thrust magnetic bearing disposed between the bearingless motor and the radial magnetic bearing. A radial load on the drive shaft is supported in a non-contact manner by the bearingless motor and the radial magnetic bearing.
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Patent Agency Ranking
公开(公告)号：US20220014058A1
公开(公告)日：2022-01-13
申请号：US17483406
申请日：2021-09-23
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yusuke IRINO , Takaaki ONO , Yuji NAKAZAWA , Tatsuya TONARI , Hisato SUMITOMO , Masatsugu TAKEMOTO
Abstract: A rotor includes a rotor core having a plurality of magnetic poles. At least one magnetic pole includes a first magnetic pole having three or more circumferentially arranged magnet holes, and a plurality of permanent magnets housed corresponding magnet holes. A portion of the rotor core between adjacent magnet holes has a radially extending region. A maximum radial dimension of each magnet hole is greater than a minimum radial dimension of a portion of the rotor core between a magnet hole radially outer surface and a rotor core outer peripheral surface. The first magnetic pole has a smaller amount of harmonic components in a radial flux density distribution on the rotor core outer peripheral surface, compared to a magnetic pole having a plurality of magnet holes arranged at equal circumferential intervals and a plurality of permanent magnets having substantially the same magnetic flux and number.
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公开(公告)号：US20210115929A1
公开(公告)日：2021-04-22
申请号：US16608709
申请日：2018-05-08
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Yuji NAKAZAWA , Atsushi SAKAWAKI , Hirofumi HIGASHI , Taiichi NOSE , Takaaki ONO , Yusuke IRINO
IPC: F04D17/10 , F04D29/058 , F16C32/04 , H02K7/09 , F25B31/02
Abstract: A drive support unit of a turbo compressor includes at least one bearingless motor. The at least one bearingless motor includes a rotor-stator pair constituted by a rotor and a stator, and is configured to rotationally drive a drive shaft and to support a radial load of the drive shaft in a contactless manner. Accordingly, it is possible to provide a turbo compressor to which a bearingless motor is applied.
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公开(公告)号：US20200277929A1
公开(公告)日：2020-09-03
申请号：US16645685
申请日：2018-09-11
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takahiro ABE , Atsushi SUHARA , Yoshiyuki HARADA , Tomomi SAKAMOTO , Yusuke IRINO
Abstract: A hydroelectric generation system includes a fluid machine disposed in a penstock or channel, a generator driven by the fluid machine, and a control unit configured to generate a predetermined torque in the generator. Fluid flows through the penstock or channel. The penstock or channel has a main path in which the fluid machine is disposed, and a detour disposed in parallel with the main path. The detour includes an on-off valve. The on-off valve is opened when not electrified, and closed when electrified.
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公开(公告)号：US20250023408A1
公开(公告)日：2025-01-16
申请号：US18900527
申请日：2024-09-27
Inventor： Yuu FU , Yusuke IRINO , Tatsuya TONARI , Takuya SAKURAGI , Masatsugu TAKEMOTO
IPC: H02K1/276
Abstract: A rotor includes a rotor core having a cavity section having a plurality of cavities for each magnetic pole and a first rib disposed between adjacent ones of the plurality cavities in a circumferential direction. The first rib extends from a radially inner side of the cavity section to a radially outer side of the cavity section. The first rib is provided not to be on a first reference line that bisects an angle between two lines connecting a rotation center of the rotor core and circumferential ends of a set of the plurality of cavities. The first rib includes a linear part extending from the radially inner side of the cavity section to the radially outer side of the cavity section in a direction of a force acting on the first rib while the rotor core is rotating.
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公开(公告)号：US20220014124A1
公开(公告)日：2022-01-13
申请号：US17484829
申请日：2021-09-24
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takaaki ONO , Yusuke IRINO , Hiroshi HIBINO
Abstract: An electric motor system includes a drive shaft, a first electric motor, a second electric motor, a first inverter, a second inverter and a control unit. The drive shaft is rotatable around an axis. The first electric motor and the second electric motor rotate the drive shaft. The first inverter supplies power in order to generate a torque to the first electric motor. The second inverter supplies power in order to generate a torque to the second electric motor. The control unit controls the first inverter and the second inverter. The controller is configured to be able to change a ratio between an output torque of the first electric motor and an output torque of the second electric motor.
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