公开(公告)号：US20240333098A1

公开(公告)日：2024-10-03

申请号：US18621098

申请日：2024-03-29

Applicant: NIDEC CORPORATION

Inventor： Kosuke OGAWA ,  Shuji IWASAKI ,  Masami SUGINO ,  Yuki YANAGITA

IPC: H02K9/06 ,  H02K1/276

CPC classification number: H02K9/06 ,  H02K1/276

Abstract: A rotor includes: a rotor core having first and second vent holes penetrating in an axial direction; and a fan disposed to face at least one end surface on an axial side of the rotor core, and having an outflow path connected to the first vent hole and an inflow path connected to the second vent hole. The fan includes a first surface facing the end surface, an outer surface positioned radially outside the first surface, and a first recess portion in the first surface and axially overlapping the first vent hole. The first recess portion includes a first opening portion opening to the outer surface. At least a part of the outflow path is surrounded by the end surface and the first recess portion. A cross-sectional area of the outflow path in the first opening portion is smaller than a minimum cross-sectional area of the inflow path.

公开(公告)号：US12107468B2

公开(公告)日：2024-10-01

申请号：US17550323

申请日：2021-12-14

Applicant: Black & Decker Inc.

Inventor： Barak N. Gohn ,  Colin M. Crosby ,  Nicholas J. Lowe ,  James R. Clarke ,  Daniel F. Heck ,  Michael P. Sikora ,  Christian B. Rogerson ,  Ryan F. Schroeder ,  Connor T. Mohan ,  Michael D. Grove

IPC: H02K21/12 ,  H02K1/16 ,  H02K1/27 ,  H02K1/276 ,  H02K1/28 ,  H02K3/28 ,  H02K3/46 ,  H02K3/52 ,  H02K5/16 ,  H02K7/14 ,  H02K9/06 ,  H02K11/33 ,  H02K21/16 ,  B25F5/00 ,  H02K11/215

CPC classification number: H02K21/12 ,  H02K1/16 ,  H02K1/165 ,  H02K1/27 ,  H02K1/276 ,  H02K1/28 ,  H02K3/28 ,  H02K3/46 ,  H02K3/522 ,  H02K5/16 ,  H02K7/145 ,  H02K9/06 ,  H02K11/33 ,  H02K21/16 ,  B25F5/001 ,  H02K11/215 ,  H02K2203/03 ,  H02K2213/03

Abstract: A brushless direct-current (BLDC) motor for a power tool includes a rotor assembly and a stator assembly including stator windings. A ratio of a motor size (Km) constant of the motor to an electrical envelope of the motor including electrical parts of the motor is greater than approximately 850 (N·m/√W)/m{circumflex over ( )}3. A ratio of a motor size (Km) constant of the motor to a magnetic envelope of the motor including stator core and windings is greater than approximately 980 (N·m/√W)/m{circumflex over ( )}3.

公开(公告)号：US12088171B2

公开(公告)日：2024-09-10

申请号：US18314031

申请日：2023-05-08

Applicant: Dengchang Yin

Inventor： Dengchang Yin

IPC: H02K5/20 ,  F02B63/04 ,  F02B63/06 ,  H02K7/18 ,  H02K9/06 ,  H02K11/05

CPC classification number: H02K5/207 ,  F02B63/044 ,  F02B63/06 ,  H02K7/1815 ,  H02K9/06 ,  H02K11/05

Abstract: The present invention relates to the technical field of heat dissipation of a complete general-purpose machine, comprising: dividing an inner cavity of a housing of a general-purpose machine generator into a low-temperature zone and a high-temperature zone, wherein an end portion of the air deflector is close to a device mounted on the inner wall of the housing, and has a gap for communicating the low-temperature zone and the high-temperature zone with a component mounted on the inner wall of the housing, and guide the air flow to enter from an air inlet of the low-temperature zone of the housing to firstly flow through a heat-generating assembly located in the low-temperature zone, then enter from the gap into the high-temperature zone to flow through the heat-generating assembly located in the high-temperature zone, and then flow out from an air outlet to cool the internal members of the general-purpose machine generator.

公开(公告)号：US20240275240A1

公开(公告)日：2024-08-15

申请号：US18436469

申请日：2024-02-08

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Jacob N. Nemec ,  Dawid A. Bilski ,  Linnea Emerson ,  Troy C. Thorson ,  Anthony E. Breitbach ,  Terry L. Timmons ,  Brandon L. Yahr ,  Paul J. Grosskreuz ,  Russell M. Rapant

IPC: H02K9/06 ,  H02K7/14

CPC classification number: H02K9/06 ,  H02K7/145

Abstract: An electric motor comprising a stator and a rotor assembly at least partially received in the stator. The rotor assembly includes a rotor body, a fan, and a shaft. The rotor body includes a lamination stack which defines a central aperture. The fan is formed separately from the rotor body, and the fan is coupled to the rotor body by a torque coupling. The shaft includes an outer surface. The shaft is pressed into the central aperture of the lamination stack with the outer surface engaged with the central aperture by an interference fit.

公开(公告)号：US20240258864A1

公开(公告)日：2024-08-01

申请号：US18615779

申请日：2024-03-25

Applicant: DENSO CORPORATION

Inventor： WATARU NIWA

IPC: H02K3/52 ,  H02K1/2798 ,  H02K9/06 ,  H02K15/03 ,  H02K21/24 ,  H02K24/00

CPC classification number: H02K3/522 ,  H02K1/2798 ,  H02K9/06 ,  H02K15/03 ,  H02K21/24 ,  H02K24/00 ,  H02K2203/06 ,  H02K2203/09

Abstract: A motor device includes a first rotor, a coil, and an electric power lead-out wire. The electric power lead-out wire is led out from the coil, extends in an axial direction through an outer peripheral side of the first rotor, and is electrically connected to an electric power busbar. The first rotor includes a holder main body and a holder rib. The holder main body extends in a plate shape in a direction orthogonal to the axial direction. The holder rib protrudes from the holder main body toward the electric power busbar in the axial direction. The holder rib extends along the holder main body in a radial direction, and rotates together with the holder main body to send a gas toward the electric power lead-out wire.

公开(公告)号：US20240235324A9

公开(公告)日：2024-07-11

申请号：US18238828

申请日：2023-08-28

Applicant: LG ELECTRONICS INC.

Inventor： Jangwon LEE ,  Myungkeun YOO ,  Changhum JO

IPC: H02K7/14 ,  B60K7/00 ,  H02K9/06 ,  H02K9/22

CPC classification number: H02K7/14 ,  B60K7/0007 ,  H02K9/06 ,  H02K9/227 ,  H02K2211/03

Abstract: A robot wheel driving apparatus includes a wheel to which a tire is coupled and configured to drive a robot, a wheel cover covering and coupled to both sides of the wheel, a motor housing inserted into the wheel, and a motor embedded in the motor housing and configured to provide a rotating force to the wheel. The wheel cover includes a wheel cover hole configured to allow air to flow from an outside of the wheel cover toward the wheel, and the wheel includes a wheel hole configured to allow air flowing into the wheel through the wheel cover hole to flow toward the motor housing, and a blade configured to allow air to flow between the wheel and the motor housing by rotation of the wheel.

公开(公告)号：US12034350B2

公开(公告)日：2024-07-09

申请号：US17050003

申请日：2019-04-26

Applicant: ebm-papst Mulfingen GmbH & Co. KG

Inventor： Gerald Jungmayr ,  Günther Weidenholzer ,  Edmund Marth

IPC: H02K49/10 ,  H02K5/173 ,  H02K5/20 ,  H02K7/00 ,  H02K7/08 ,  H02K9/06 ,  H02K11/215

CPC classification number: H02K49/102 ,  H02K5/1732 ,  H02K5/207 ,  H02K7/003 ,  H02K7/083 ,  H02K9/06 ,  H02K11/215 ,  H02K2205/09 ,  H02K2207/03 ,  H02K2211/03

Abstract: The invention relates to an electrical machine, in particular an electric drive unit comprising an electric motor and a magnetic gear. In accordance with one embodiment the electrical machine has the following: a housing, a first shaft arranged in the housing, by means of which first shaft a first permanent magnet assembly and a second permanent magnet assembly are rigidly connected, and a stator arranged internally on the housing, which stator together with the first shaft forms the electric motor. The electrical machine also has a tubular machine element with a plurality of ferromagnetic pole shoes, into which the first shaft is at least partially inserted, such that the first shaft is situated coaxially with the tubular machine element and the second permanent magnet assembly is situated within the tubular machine element. The first shaft is mounted at a first end on the tubular machine element by means of a first bearing inside the tubular machine element. An annular third permanent magnet assembly is arranged around the tubular machine element so that the second permanent magnet assembly, the tubular machine element and the third permanent magnet assembly form the magnet gear. Either the tubular machine element is mounted rotatably on the housing and the annular third permanent magnet assembly is rigidly connected to the housing, or the tubular machine element is rigidly connected to the housing and the annular third permanent magnet assembly is mounted rotatably on the housing.

公开(公告)号：US12027945B2

公开(公告)日：2024-07-02

申请号：US17615249

申请日：2019-06-05

Applicant: Mitsubishi Electric Corporation

Inventor： Yoshifumi Ajioka ,  Seiji Haga

IPC: H02K7/00 ,  H02K5/20 ,  H02K7/08 ,  H02K7/14 ,  H02K9/06

CPC classification number: H02K5/207 ,  H02K7/003 ,  H02K7/08 ,  H02K7/14 ,  H02K9/06

Abstract: A frame of an electric motor has inlet holes to allow ambient air to flow into an inside of the motor and outlet holes to allow the ambient air entering through the inlet holes to flow out to an outside of the motor. The motor includes a shaft, a rotor, a stator, a fan to rotate integrally with the shaft, and a guide. The guide is disposed outwardly of the fan in the radial direction and has a shape for suppressing foreign materials contained in the ambient air entering through the inlet holes from coming into contact with the stator and the rotor.

公开(公告)号：US20240208028A1

公开(公告)日：2024-06-27

申请号：US18597411

申请日：2024-03-06

Applicant: Black & Decker Inc.

Inventor： Joseph P. KELLEHER ,  William F. GALLAGHER ,  Craig A. OKTAVEC ,  David J. SMITH ,  Jarrett A. DUNSTON

IPC: B25F5/00 ,  B24B23/02 ,  B25F5/02 ,  H02K1/14 ,  H02K1/2706 ,  H02K3/18 ,  H02K3/34 ,  H02K3/38 ,  H02K3/487 ,  H02K3/52 ,  H02K5/10 ,  H02K5/20 ,  H02K7/08 ,  H02K7/116 ,  H02K7/14 ,  H02K9/04 ,  H02K9/06 ,  H02K9/22 ,  H02K11/215 ,  H02K11/33 ,  H02K21/16

CPC classification number: B25F5/008 ,  B24B23/028 ,  B25F5/02 ,  H02K1/146 ,  H02K1/2706 ,  H02K3/18 ,  H02K3/34 ,  H02K3/487 ,  H02K3/522 ,  H02K5/10 ,  H02K5/207 ,  H02K7/08 ,  H02K7/116 ,  H02K7/145 ,  H02K9/04 ,  H02K9/06 ,  H02K9/227 ,  H02K11/215 ,  H02K11/33 ,  H02K21/16 ,  H02K3/38 ,  H02K2203/09 ,  H02K2203/12 ,  H02K2213/03

Abstract: A power tool is provided including a tool housing including a motor housing and a handle portion; a battery receptacle disposed at an end of the handle portion opposite the motor housing, the battery receptacle being configured to receive a battery pack; and a brushless DC motor including a stator and a rotor. The stator includes a stator lamination stack, an end insulator, and input terminals supported by the end insulator. A power circuit board is coupled to the input terminals to supply power to the motor. The motor produces a maximum power output of at least 1600 watts for driving an output shaft at a maximum torque of at least 30 inch-pounds and a maximum speed of at least 8000 rotations-per-minute.

公开(公告)号：US12017786B2

公开(公告)日：2024-06-25

申请号：US17708468

申请日：2022-03-30

Applicant: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC.

Inventor： Shailesh N. Joshi ,  Hiroshi Ukegawa

IPC: H02K9/06 ,  B64D27/24 ,  B64D33/08 ,  H02K5/20 ,  H02K7/108 ,  H02K11/25 ,  H02K11/33 ,  B64C29/00

CPC classification number: B64D33/08 ,  B64D27/24 ,  H02K5/207 ,  H02K7/108 ,  H02K9/06 ,  H02K11/25 ,  H02K11/33 ,  B64C29/00

Abstract: An auxiliary fan based hybrid cooling system of an electric machine is contemplated. The hybrid cooling system comprises a propeller positioned on an exterior portion of an enclosure and mechanically coupled to a rotor, at least one electronic component, a stator, the rotor, and an auxiliary fan disposed within the enclosure, and wherein: in a single cooling mode, the propeller rotates to generate air that is channeled into the enclosure, in a dual cooling mode: the propeller rotates to generate the air that is channeled into the enclosure, a coupling mechanism simultaneously engages the rotor and the auxiliary fan and links the propeller to the auxiliary fan by the engaging of the rotor with the auxiliary fan, and the auxiliary fan, rotates responsive to the rotation of the propeller in the dual cooling mode.