公开(公告)号：US20240297541A1

公开(公告)日：2024-09-05

申请号：US18583772

申请日：2024-02-21

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takahiro SAITO ,  Kyoko NAKAMURA ,  Hikohito YAMAZAKI

IPC: H02K1/2783 ,  H02K29/03

CPC classification number: H02K1/2783 ,  H02K29/03

Abstract: An electric motor has a rotor with a plurality of magnets arranged on a surface of the rotor. When viewed along an axial direction of the rotor, the plurality of magnets may have following features: a direction of a magnetic pole of each of the plurality of magnets is rotated by 45 degrees sequentially from one to next along a circumferential direction of the rotor; and a width of each of the magnets of which the magnet pole direction is inclined by 45 degrees relative to a radial direction of the rotor is wider than a width of each of the magnets of which the magnet pole direction coincides with the circumferential direction or the radial direction.

公开(公告)号：US12081088B2

公开(公告)日：2024-09-03

申请号：US17859412

申请日：2022-07-07

Applicant: YAMAHA HATSUDOKI KABUSHIKI KAISHA

Inventor： Takayuki Kobayashi ,  Hirotaka Kurita ,  Tatsuya Hagiwara ,  Takumi Sugimura

IPC: H02K1/2793 ,  H02K1/16 ,  H02K1/2713 ,  H02K3/12 ,  H02K3/34 ,  H02K21/24 ,  H02K29/03

CPC classification number: H02K29/03 ,  H02K1/16 ,  H02K1/2713 ,  H02K1/2793 ,  H02K3/12 ,  H02K3/34 ,  H02K21/24

Abstract: An axial-gap-dynamoelectric machine includes resin bobbins having positioning protrusions, and a stator core including a base yoke having a plurality of tooth holes and positioning holes. In each tooth hole, a circumferential length of a tooth-hole-radial-direction-outer-end surface is larger than a circumferential length of a tooth-hole-radial-direction-inner-end surface. Each of the plurality of teeth has a columnar shape in which a circumferential length of a tooth-upper surface is larger than a circumferential length of a tooth-bottom surface. The positioning protrusions are inserted in the positioning holes, and press the teeth against the base yoke inward in the radial direction such that the tooth-bottom surface is brought into contact with the tooth-hole-radial-direction-inner-end surface and the tooth-oblique surface is brought into contact with the tooth-hole-circumferential-direction-end surface.

公开(公告)号：US20240266893A1

公开(公告)日：2024-08-08

申请号：US18564164

申请日：2021-08-27

Applicant: HITACHI ASTEMO, LTD.

Inventor： Yuji KOBAYASHI ,  Yasuyuki SAITO ,  Miku TAKAHASHI ,  Hiroki NARUSHIMA

IPC: H02K1/276 ,  B60K6/26 ,  H02K29/03

CPC classification number: H02K1/276 ,  B60K6/26 ,  B60Y2200/92 ,  B60Y2400/60 ,  H02K29/03

Abstract: A rotor for a rotary electric machine, and a rotary electric machine using the same include a pair of first magnets arranged in a V shape, and a pair of second magnets, magnet holes are provided with a first magnetic vacancy facing a d-axis with the first magnet interposed therebetween, and a second magnetic vacancy facing the d-axis with the second magnet interposed therebetween, the distance from the d-axis to an end portion of the first magnetic vacancy is made larger than the distance from the d-axis to an end portion of the second magnet in an outermost diameter side when viewed in a direction perpendicular to the d-axis, the distance between the first magnetic vacancy and the second magnetic vacancy in an outermost diameter side is smaller than the distance between the second magnetic vacancies adjacent to each other in a plurality of magnetic poles, and the V-shape formed by the pair of first magnets has an inside angle with a magnitude which is larger than that of the inside angle formed by the pair of second magnets.

公开(公告)号：US20240204637A1

公开(公告)日：2024-06-20

申请号：US18083436

申请日：2022-12-16

Applicant: STEERING SOLUTIONS IP HOLDING CORPORATION

Inventor： Shuvajit Das ,  Rakibul Islam ,  Mojtaba Bahrami Kouhshahi ,  Alejandro Pina Ortega

IPC: H02K29/03 ,  B62D5/04 ,  H02K1/276 ,  H02K1/278

CPC classification number: H02K29/03 ,  B62D5/0403 ,  B62D5/046 ,  H02K1/276 ,  H02K1/278 ,  H02K2201/06

Abstract: A system includes an electric motor, a rotor associated with electric motor, a first pole of the rotor, and a first magnet stack associated with the first pole. The first magnet set includes a set of magnets disposed proximate the rotor arranged according to a skewed arrangement and including at least a first magnet having a first length, a second magnet having a second length, and a third magnet having a third length.

公开(公告)号：US12003146B2

公开(公告)日：2024-06-04

申请号：US17190354

申请日：2021-03-02

Applicant: Falcon Power, LLC

Inventor： Harley C. McDonald ,  James L. Bailey ,  Matthew C. McDonald

IPC: H02K11/28 ,  H02K1/16 ,  H02K1/20 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K29/03 ,  H03K3/011 ,  H03K17/687 ,  H05K7/20 ,  H02K5/10

CPC classification number: H02K11/28 ,  H02K1/16 ,  H02K1/20 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K29/03 ,  H03K3/011 ,  H03K17/6871 ,  H05K7/209 ,  H02K5/10 ,  H02K2213/03

Abstract: A cascade MosFet circuit design for variable gear switching using pulse width modulation (PWM) between electronic gears to achieve a smooth transition is disclosed. In an embodiment, in the system, there can be three separate stages of two or more switches from very low amperage to hundreds of amps that can be automatically selected within a chosen stage. The automatic switching can be programmed to be power (e.g., current) sensitive or can be both power and electronic gear sensitive as to cascade into the right MosFet combination for different gear settings and still select greater values for varying power levels. Such a smooth transition can allow the generator or motor using such cascade MosFet circuit design to operate more efficiently and/or more quietly.

公开(公告)号：US20240162764A1

公开(公告)日：2024-05-16

申请号：US18548220

申请日：2022-06-13

Applicant: NIDEC CORPORATION

Inventor： Tomoya UEDA

IPC: H02K1/18 ,  H02K1/276 ,  H02K21/14 ,  H02K29/03

CPC classification number: H02K1/185 ,  H02K1/276 ,  H02K21/14 ,  H02K29/03

Abstract: A rotary electric machine includes: a rotor in which a plurality of permanent magnets are embedded in an outer peripheral portion, the rotor being rotatable; a stator fixed around the rotor and provided with a plurality of coils in a stator core; and a motor housing that accommodates the rotor and the stator therein. The stator is fixed to the motor housing by a bolt (fastener) inserted into a plurality of fixing portions protruding radially outward from an outer periphery of the stator core, and a flux barrier penetrating in an axial direction is formed near the fixing portion of the stator core and at a position not overlapping the fixing portion in a radial direction. Here, the fixing portions are disposed at equiangular pitches in the circumferential direction of the stator core, and the flux barriers are formed on both sides of the fixing portion in a circumferential direction.

公开(公告)号：US20240154508A1

公开(公告)日：2024-05-09

申请号：US18281973

申请日：2022-03-18

Applicant: Hanon Systems

Inventor： Seong Kook CHO ,  Hyeon Jae SHIN ,  Ho Bin IM

IPC: H02K29/03 ,  H02K1/276 ,  H02K21/16

CPC classification number: H02K29/03 ,  H02K1/276 ,  H02K21/16

Abstract: The present invention relates to a brushless motor, and more particularly, to a brushless motor capable of cogging torque and torque ripples of the motor by means of design structures such as a shape of an opposing surface of a pole shoe, a shape of an outer circumferential surface of a rotor, and shapes and arrangement of permanent magnets.

公开(公告)号：US11936244B2

公开(公告)日：2024-03-19

申请号：US17277280

申请日：2019-08-20

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Kiyotaka Nishijima ,  Akinobu Ishizaki ,  Hisato Sumitomo ,  Takanori Hori

IPC: H02K1/276 ,  F25B1/00 ,  H02K21/16 ,  H02K29/03

CPC classification number: H02K1/2766 ,  F25B1/005 ,  H02K21/16 ,  H02K29/03

Abstract: A rotor includes a rotor core. The rotor core has an outer shape including a first arc portion provided so as to intersect a d-axis, a straight line portion provided so as to intersect a q-axis, and a curved portion that connects the first arc portion and the straight line portion. The first arc portion has an arc shape centered on an axial center of the rotor core. The curved portion includes an arc-shaped second arc portion that bulges outward in a radial direction of the rotor core. The radius of curvature of the second arc portion being smaller than a radius of curvature of the first arc portion.

公开(公告)号：US20240072592A1

公开(公告)日：2024-02-29

申请号：US18260347

申请日：2021-07-11

Applicant: ABB Schweiz AG

Inventor： Jori Keitamo ,  Aron Szucs ,  Ari Vartiainen ,  Juhani Mantere ,  Klas Sandholm

IPC: H02K3/28 ,  H02K21/22

CPC classification number: H02K3/28 ,  H02K21/22 ,  H02K29/03

Abstract: An annular stator provided with axial stator slots and stator teeth formed between adjacent stator slots. Each stator slot receives a conductor of a stator winding. The stator is formed of stator sectors. Each stator sector includes two outermost stator teeth and intermediate stator teeth between the two outermost stator teeth. A width of the two outermost stator teeth is equal. Adjacent stator slots within each stator sector are distanced by a first slot pitch and adjacent stator slots belonging to different stator sectors are distanced by a second slot pitch. The first slot pitch is smaller than the second slot pitch.

公开(公告)号：US20240030785A1

公开(公告)日：2024-01-25

申请号：US18359601

申请日：2023-07-26

Applicant: Falcon Power, LLC

Inventor： Harley C. McDonald ,  James L. Bailey ,  Matthew C. McDonald

IPC: H02K11/28 ,  H05K7/20 ,  H03K3/011 ,  H03K17/687 ,  H02K1/20 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K1/16 ,  H02K1/278 ,  H02K29/03

CPC classification number: H02K11/28 ,  H05K7/209 ,  H03K3/011 ,  H03K17/6871 ,  H02K1/20 ,  H02K3/24 ,  H02K5/20 ,  H02K9/197 ,  H02K1/16 ,  H02K1/278 ,  H02K29/03 ,  H02K5/10

Abstract: An) electric machine with variable torque generation having a tunable Halbach array configuration. The electric machine includes a magnet assembly for generating a magnetic field. The magnet assembly includes a plurality of fixed magnets disposed in a ring arrangement so that fixed magnets having a north pole faced toward the rotor or stator are alternated with fixed magnets having a south pole faced toward the rotor or stator, a plurality of rotatable magnets disposed within a respective slot formed between two adjacent fixed magnets, a drive assembly for turning the rotatable magnets within the slots to vary the magnetic field generated by the magnet assembly in the rotor or stator, the drive assembly configured to turn the rotatable magnets between a first position wherein the magnetic field in the rotor or stator is augmented and a second position wherein the magnetic field in the rotor or stator is cancelled.