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Patent Agency Ranking
公开(公告)号：US20230216360A1
公开(公告)日：2023-07-06
申请号：US18001133
申请日：2021-06-08
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takuya SAKURAGI , Yoshiki YASUDA , Daiki MIWA , Akio YAMAGIWA , Hiroshi HIBINO
IPC: H02K1/2795 , H02K1/276 , H02K11/40
CPC classification number: H02K1/2795 , H02K1/2766 , H02K11/40
Abstract: A technique by which the magnetic flux of the magnetic pole facing the stator of the magnet can be further increased in a rotor, is provided. An electric motor according to the present disclosure includes a stator 10; a rotor 20 facing the stator 10 in an axial direction (first direction) and configured to be rotatable in a circumferential direction (second direction) that is orthogonal to the axial direction; and a short-circuit reduction member 25, 26, wherein the rotor 20 includes a main magnet 22 having a first magnetic pole on a surface facing the stator 10; an auxiliary magnet 23, 24 arranged adjacent to the main magnet 22 and having a second magnetic pole and a third magnetic pole that is different in polarity from the second magnetic pole, and configured to increase a magnetic flux of the first magnetic pole, and wherein the auxiliary magnet 23, 24 is arranged adjacent to the main magnet 22 in a radial direction (third direction) that is orthogonal to the axial direction, and the short-circuit reduction member 25, 26 is provided at a portion around the auxiliary magnet 23, 24 facing the auxiliary magnet 23, 24 in parallel with a virtual line connecting the second magnetic pole and the third magnetic pole, to reduce a short-circuit of a magnetic flux between the second magnetic pole and the third magnetic pole.
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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：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：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：US20230216376A1
公开(公告)日：2023-07-06
申请号：US18000859
申请日：2021-06-09
Applicant: DAIKIN INDUSTRIES, LTD.
Inventor： Takuya SAKURAGI , Daiki MIWA , Yoshiki YASUDA , Akio YAMAGIWA , Hiroshi HIBINO
Abstract: An electric motor includes: a rotor configured to be rotatable about a rotation axis and to which a fluid drive unit is fixed; a stator that is disposed inward of the rotor and includes claw pole stator units, the claw pole stator units each including a winding that is wound in an annular shape around the rotation axis and an iron core that surrounds the winding; a hole that is provided in one end portion of the rotor so as to penetrate from inside to outside of the rotor, the stator being provided in the inside and the fluid drive unit being fixed to the outside of the rotor; and an inflow path configured to cause a surrounding fluid to flow into inside of a stator unit, the stator unit being provided at one other end portion opposite to the one end portion in an axial direction.
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