公开(公告)号：US20240413686A1

公开(公告)日：2024-12-12

申请号：US18733549

申请日：2024-06-04

Applicant: Robert Bosch GmbH

Inventor： Simon Mensak ,  Robert Bonasewicz

IPC: H02K1/28 ,  H02K1/278 ,  H02K7/14 ,  H02K15/03 ,  H02K21/16

Abstract: A brushless electric machine, in particular a brushless DC motor, has a stator and a rotor arranged within the stator so as to be rotatable relative thereto. The rotor has a cylindrical base body which is non-rotatably connected to a machine shaft and carries a plurality of permanent magnets on its outer circumference, and the stator has a stator winding with a plurality of single-tooth windings for driving the rotor via an electrically generated magnetic field. The permanent magnets of the rotor are fixed by a thin-walled reinforcement radially surrounding them, wherein the reinforcement is connected to the permanent magnets by a plurality of welding points in a materially and/or positively locking manner.

公开(公告)号：US20240405650A1

公开(公告)日：2024-12-05

申请号：US18802800

申请日：2024-08-13

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

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：US20240380295A1

公开(公告)日：2024-11-14

申请号：US18314453

申请日：2023-05-09

Applicant: Rolls-Royce Corporation

Inventor： David Russell Trawick ,  Mathew Gregory Hill

IPC: H02K21/16 ,  H02K1/2789 ,  H02K7/12 ,  H02K7/18 ,  H02K7/20

Abstract: An example electrical machine is described that includes active segments for variable voltage generation. The electrical machine includes a drive shaft, a fixed rotor segment, an active rotor segment, and an actuator mechanism. The fixed rotor segment is coupled to the drive shaft, where the fixed rotor segment has affixed thereon first permanent magnets of alternating polarity. The active rotor segment axially is adjacent to the fixed rotor segment along the drive shaft. The active rotor segment also has affixed thereon second permanent magnets of alternating polarity. The actuator mechanism is configured to articulate the active rotor segment relative to the fixed rotor segment and thereby alter a phase of the second permanent magnets relative to the first permanent magnets in order to change a first voltage generated by the electrical machine to a second voltage generated by the electrical machine.

公开(公告)号：US20240364176A1

公开(公告)日：2024-10-31

申请号：US18542750

申请日：2023-12-17

Applicant: MITSUBA Corporation

Inventor： NAOYUKI MIYASHITA ,  SHUHEI KOIKE

IPC: H02K5/06 ,  H02K5/173 ,  H02K7/08 ,  H02K11/33 ,  H02K15/14 ,  H02K21/16

CPC classification number: H02K5/06 ,  H02K5/1732 ,  H02K7/083 ,  H02K11/33 ,  H02K15/14 ,  H02K21/16 ,  H02K2211/03

Abstract: In a motor device, a case includes a total of three first insertion holes through which fixing male screws fixing the case to a bracket are respectively inserted, and a total of three second insertion holes through which fixing bolts fixing the bracket to an electric brake device are respectively inserted. The bracket has a total of three female screw members into which the fixing male screws are respectively screwed, and insertion holes of a total of three collars through which the fixing bolts are respectively inserted. The total of three second insertion holes and the insertion holes of the total of three collars respectively include round holes that are arranged on an axis with each other and position the case with respect to the bracket.

公开(公告)号：US12113412B2

公开(公告)日：2024-10-08

申请号：US17322685

申请日：2021-05-17

Applicant: The Regents of the University of California

Inventor： Stefano Foresti ,  Christopher Chalabi ,  Johnathan Deas ,  Sonia Desaidamle ,  Samuel Gottesfeld ,  Blair Macleod ,  Christopher Reps ,  Michiro Robinson

IPC: H02K21/16 ,  H02K1/28 ,  H02K7/116 ,  H02K16/00

CPC classification number: H02K21/16 ,  H02K1/28 ,  H02K7/116 ,  H02K16/00 ,  H02K2213/03

Abstract: An electric motor with multiple electric gears to achieve an effect equivalent to mechanical gears in transmissions, enabling more efficient use of electricity at a wider range of speeds and torques is described. The Gears for Electric Motor (GEM) comprises a multi-phase motor having a concentric set of dedicated rotors to specific ranges of revolutions per minute (RPMs), and corresponding stators. The rotors and stators may be fitted within each other or positioned approximately parallel to each other along the longitudinal axis of the motor shaft. A controller determines which rotors are activated based on desired efficiency, torque and speed. Alternately, or in addition, magnets and coil pairs are constructed with varying properties to make more efficient use of electricity at a wider range of speeds and torques.

公开(公告)号：US20240333069A1

公开(公告)日：2024-10-03

申请号：US18606098

申请日：2024-03-15

Applicant: AICHI ELECTRIC CO., LTD.

Inventor： Takashi HORI ,  Shoji MANO ,  Masahiro HASEGAWA

IPC: H02K3/52 ,  F25B31/02 ,  H02K1/14 ,  H02K21/16

CPC classification number: H02K3/522 ,  H02K1/146 ,  H02K21/16 ,  F25B31/026 ,  H02K2203/12

Abstract: A motor includes a rotor and a stator having a tubular stator core, first and second electrical insulators arranged on first and second axial ends of the stator care and a stator winding. Each of the first and second electrical insulators includes an outer wall part, inner wall parts and body parts. The stator winding includes first, second and third phase stator windings and each of the windings has winding parts respectively wound around teeth of the stator core, a first lead part and a second lead part. Each of the first lead parts is connected to a power supply, and each of the second lead parts is connected in common to a neutral point part. The outer wall part of the first electrical insulator assembly includes a first movement restriction part that restricts movement of the neutral point part.

公开(公告)号：US12090619B2

公开(公告)日：2024-09-17

申请号：US17514691

申请日：2021-10-29

Applicant: MAKITA CORPORATION

Inventor： Takaharu Nakatsuka ,  Yoshihiro Ito

IPC: B25F5/00 ,  H02K5/173 ,  H02K7/08 ,  H02K7/116 ,  H02K7/14 ,  H02K11/24 ,  H02K21/16 ,  B25B23/147

CPC classification number: B25F5/001 ,  H02K5/1732 ,  H02K7/083 ,  H02K7/116 ,  H02K7/145 ,  H02K11/24 ,  H02K21/16 ,  B25B23/147

Abstract: A torque sensor is less likely to lower detection accuracy. A screwing machine includes a motor including a stator and a rotor rotatable about a rotation axis, a gear case, a planetary gear, an internal gear connected to the planetary gear, a torque sensor including a front plate coupled to the internal gear, a rear plate supported by the gear case, a hollow portion located between the front plate and the rear plate, and a strain gauge fixed to the hollow portion, a bearing located between the stator and the rear plate and supporting at least a part of the rotor, and a bearing box surrounding the bearing and supporting the bearing.

公开(公告)号：US20240297547A1

公开(公告)日：2024-09-05

申请号：US18578441

申请日：2022-07-12

Applicant: Dyson Technology Limited

Inventor： Harry Alexander MORLEY ,  Thomas Richard STAFFORD ,  Japhet Lee Cordova MORABE ,  Christopher David TOWNEND

IPC: H02K3/52 ,  A47L5/24 ,  H02K5/173 ,  H02K7/08 ,  H02K15/12 ,  H02K21/16

CPC classification number: H02K3/522 ,  A47L5/24 ,  H02K5/1732 ,  H02K7/083 ,  H02K15/12 ,  H02K21/16 ,  H02K2203/12

Abstract: A brushless motor has a stator assembly, and a frame within which the stator assembly is housed. The stator assembly has a plurality of stator core sub-assemblies, each having a stator core, a bobbin attached to the stator core, and a winding wound about the bobbin. Each bobbin has a connection portion for connecting to an adjacent bobbin in the stator assembly, and the frame is overmoulded to the stator assembly.

公开(公告)号：US20240283341A1

公开(公告)日：2024-08-22

申请号：US18582588

申请日：2024-02-20

Applicant: BHE Turbomachinery, LLC

Inventor： Barry T. Brinks ,  Henry K. Obermeyer

IPC: H02K21/16

CPC classification number: H02K21/16

Abstract: A synchronous-reluctance, rotary motor-generator having a rotor, a stator, a radial air gap positioned radially between the stator and the rotor, and a conductor winding assembly. The rotor has an even number of crescent rotor poles with a gap between adjacent crescent rotor poles. Each crescent rotor pole is non-symmetric about a radially-oriented centerline of the rotor ferromagnetic flux path. Each low-reluctance direct axis of the rotor passes through at least one of the gaps between the crescent rotor poles. Each crescent rotor pole is positioned tangentially to the radial air gap. The stator is on a common center with the rotor. The stator has a stator salient pole between each coil winding slot and positioned tangentially to the radial air gap. Each stator salient pole is non-symmetric about a radially-oriented centerline of the stator-salient-pole.

公开(公告)号：US12051946B2

公开(公告)日：2024-07-30

申请号：US17427088

申请日：2019-11-01

Applicant: NIDEC SANKYO CORPORATION

Inventor： Masahiro Kosuge ,  Masato Gomyo ,  Kazuma Yamamoto

IPC: H02K1/28 ,  H02K1/2733 ,  H02K15/03 ,  H02K21/16

CPC classification number: H02K1/28 ,  H02K1/2733 ,  H02K15/03 ,  H02K21/16

Abstract: In a rotor of a motor or the like, in order to suppress scattering of a part of a magnet provided around a rotating shaft, the rotor has a cylindrical magnet through which the rotating shaft passes, a first holder which covers the magnet from one side in an axial direction of the rotating shaft and a second holder which covers the magnet from the other side in the axial direction. The magnet is press-fitted into a first body portion of the first holder and a second body portion of the second holder, and a first end of the first body portion and a second end of the second body portion are joined by welding or the like. An inner diameter of the first end and the inner diameter of the second end are larger than an outer diameter of the magnet.