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公开(公告)号：US20250055360A1
公开(公告)日：2025-02-13
申请号：US18928528
申请日：2024-10-28
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA
Abstract: An electric work machine (1) includes: a brushless motor having a stator disposed around a rotor (30); and an output part driven by the rotor. The rotor has a rotor core (31) and first and second magnetic-pole parts (34S, 34N) disposed around a circumferential direction of the rotor core. When the induced voltage of the brushless motor is given as Va, the power-supply voltage of the brushless motor is given as Vb, the rotational speed of the brushless motor is given as ω, a first induced voltage constant, which is expressed by Va/ω, is given as Ea [V/krpm], a pole-pairs count, which is the number of the first magnetic-pole parts or the second magnetic-pole parts, is given as Pi, and a second induced voltage constant, which is expressed as Ea/Pi, is given as Eb [V/krpm·pole-pairs count], the motor satisfies the condition: Eb≤0.025×Vb.
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公开(公告)号：US12224637B2
公开(公告)日：2025-02-11
申请号：US18084958
申请日：2022-12-20
Applicant: DENSO CORPORATION
Inventor： Kouji Hotsuta
Abstract: A rotary electrical machine includes a stator core having a plurality of teeth, a plurality of windings having coils wound around the teeth, a plurality of coil terminals connected to the windings, a plurality of external connection terminals connected to the coil terminals and connectable to an external power supply terminal, and a plurality of terminal holding portions attached to the stator core and holding the coil terminals. The external connection terminal has a contacted portion that extends in a direction perpendicular to the axial direction and abuts against the contact portion of the coil terminal in the axial direction. A terminal holding portion holds the coil terminal so as to be relatively movable in the directions of approaching and separating from the contacted portion.
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公开(公告)号：US20250038603A1
公开(公告)日：2025-01-30
申请号：US18919036
申请日：2024-10-17
Applicant: Black & Decker Inc.
Inventor： David J. Smith , Justin H. Ayers , David E. Gillespie , Eric E. Hatfield , Earl M. Ortt , Stephen Osborne , Brian Friedman , Jarrett A. Dunston
Abstract: A stator assembly for a BLDC motor includes a stator core, at least one magnet wire wound on poles of the stator core, an end insulator mounted on an end surface of the stator core, a non-conductive mount member mounted on the outer circumferential surface of the stator core, and conductive terminals mounted on the non-conductive mount member. Each conductive terminal includes: a main portion mounted on the non-conductive mount, a tang portion extending from a first longitudinal end adjacent the end insulator and folded over the main portion, and a connection tab extending angularly from a second longitudinal end. A contact portion of the magnet wire is wrapped around the tang portion and fused to make an electric connection to the conductive terminal.
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公开(公告)号：US20240429767A1
公开(公告)日：2024-12-26
申请号：US18708083
申请日：2022-11-08
Applicant: LG INNOTEK CO., LTD.
Inventor： Han Jong HA , Se Jong KIM
Abstract: The present invention may provide a motor including a shaft, a rotor coupled to the shaft, a stator disposed to correspond to the rotor, a housing which accommodates the stator, and a cap disposed on the housing, wherein the stator includes a stator core, an insulator coupled to the stator core, and a coil disposed on the insulator and includes a busbar electrically connected to the coil and a busbar holder which supports the busbar, the cap includes a hole through which the busbar passes and a protruding portion protruding from a lower surface of the cap, and the protruding portion is in contact with a stepped surface of the busbar.
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公开(公告)号：US12165788B2
公开(公告)日：2024-12-10
申请号：US17082751
申请日：2020-10-28
Applicant: Mitsubishi Electric Corporation
Inventor： Shiori Natori , Naoki Yasuda , Kazuya Hasegawa , Kenji Maekawa , Yasuhiro Hayasaka
Abstract: In the insulation sheet, an insulation resin layer made of a thermosetting resin composition in an uncured or semi-cured state is formed on one or each of both surfaces of the base material. The thermosetting resin composition contains: a thermosetting resin (A) that is in solid form at 25° C.; a thermosetting resin (B) that is in liquid form at 25° C.; a latent curing agent that is unreactive at 60° C. or lower; and an inorganic filler having a maximum particle diameter smaller than a film thickness of the insulation resin layer and having an average particle diameter smaller than 0.5 times the film thickness. The insulation resin layer of the insulation sheet is efficiently compressed into a predetermined thickness by pressure application at normal temperature and permeates a gap between a stator core and a stator coil by heating during curing treatment, whereby both members can be insulated and fixed.
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Patent Agency Ranking
公开(公告)号：US20240405626A1
公开(公告)日：2024-12-05
申请号：US18326574
申请日：2023-05-31
Applicant: Ford Global Technologies, LLC
Inventor： Akash Changarankumarath Pradeepkumar , Singar Rathnam
Abstract: A motor includes a stator core and a stator booster. The stator booster includes a booster back-iron and a plurality of booster teeth. The booster back-iron includes a first end surface that abuts a first end surface of the stator core's back-iron for electrical communication therewith. The booster teeth extend radially inward from the booster back-iron and are spaced apart from one another in a circumferential direction about the central axis to define a plurality of booster slots that align with slots of the stator core. A first end surface of each booster tooth abuts a first end surface of a corresponding tooth of the stator core for electrical communication therewith. An electrically insulating material encapsulates opposite sides of each booster tooth that define the booster slots and a second end surface of each booster tooth that is opposite the first end surface of that booster tooth.
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公开(公告)号：US12149140B2
公开(公告)日：2024-11-19
申请号：US18342351
申请日：2023-06-27
Applicant: LG Electronics Inc.
Inventor： Joohang Kang , Hyeonho Ha , Yongdae Kim , Jin Hong
Abstract: An electric motor assembly includes a stator and a rotor configured to rotate relative to the stator. The stator includes a stator core including a yoke that has a ring shape and a plurality of teeth radially coupled to an inner surface of the yoke, a stator coil that is wound around the stator core, and an insulator disposed between the stator core and the stator coil. The insulator includes a yoke insulator that is coupled to the yoke with a first coupling tolerance defined between the yoke insulator and the plurality of tooth insulators, and a plurality of tooth insulators that are coupled to the plurality of teeth, respectively, with a second coupling tolerance defined between the yoke and the plurality of teeth. The first coupling tolerance is less than the second coupling tolerance.
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公开(公告)号：US12126234B2
公开(公告)日：2024-10-22
申请号：US17484595
申请日：2021-09-24
Applicant: Black & Decker Inc.
Inventor： David J. Smith , Justin H. Ayers , David E. Gillespie , Eric E. Hatfield , Earl M. Ortt , Stephen Osborne , Brian Friedman , Jarrett A. Dunston
CPC classification number: H02K3/345 , H02K3/34 , H02K3/521 , H02K3/522 , H02K5/225 , H02K7/145 , H02K2203/06
Abstract: A stator assembly for a BLDC motor includes a stator core, at least one magnet wire wound on poles of the stator core, an end insulator mounted on an end surface of the stator core, a non-conductive mount member mounted on the outer circumferential surface of the stator core, and conductive terminals mounted on the non-conductive mount member. Each conductive terminal includes: a main portion mounted on the non-conductive mount, a tang portion extending from a first longitudinal end adjacent the end insulator and folded over the main portion, and a connection tab extending angularly from a second longitudinal end. A contact portion of the magnet wire is wrapped around the tang portion and fused to make an electric connection to the conductive terminal.
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公开(公告)号：US12081079B2
公开(公告)日：2024-09-03
申请号：US17471412
申请日：2021-09-10
Applicant: FORD GLOBAL TECHNOLOGIES, LLC
Inventor： Akash Changarankumarath Pradeepkumar , Singar Rathnam
CPC classification number: H02K11/25 , H02K1/16 , H02K3/12 , H02K3/28 , H02K3/34 , H02K3/48 , H02K15/064 , B60K6/26
Abstract: A vehicle includes a battery, an electric machine, a thermistor, and a controller. The electric machine is configured to draw electrical power from the battery to propel the vehicle. The electric machine has a rotor and a stator. The stator has a core, interconnected hairpins, and a neutral bar. The core defines slots. The interconnected hairpin windings are arranged within the slots and are arranged to form a plurality of electrical phases. The neutral bar is connected to each of the electrical phases and defines an orifice. The thermistor is disposed within the orifice and is configured to sense a temperature of the electric machine. The controller is programmed to control a power output of the electric machine based on the temperature of the electric machine.
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公开(公告)号：US12081067B2
公开(公告)日：2024-09-03
申请号：US17052456
申请日：2020-06-02
Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION
Inventor： Andrew T. Beyerl , Keith Boulanger , Ryan B. Jipp , Timothy R. Obermann , Matthew R. Bailey
Abstract: A stator includes insulation including a back insulation portion covering a back stator portion, a first tooth portion covering a first tooth, a second tooth portion covering a second tooth. A first flange portion has a first face that is in facing relationship with the back insulation portion. A second flange portion has a second face that is in facing relationship with the back insulation portion. The first face and the second face together substantially defining a boundary plane, such that a cross-sectional slot area is defined between the back insulation portion, the first tooth portion, the second tooth portion, and the boundary plane. A plurality of conductive wires are arranged in the cross-sectional slot area, the wires defining a cross-sectional winding area within the cross-sectional slot area. A ratio of the cross-sectional winding area to the cross-sectional slot area is greater than or equal to 0.45.
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