公开(公告)号：US12234021B2

公开(公告)日：2025-02-25

申请号：US18391266

申请日：2023-12-20

Applicant: Archer Aviation Inc.

Inventor： Scott Graves

IPC: B64D27/24 ,  B64C27/54 ,  B64C29/00 ,  B64D33/08 ,  B64D35/02 ,  H02K1/27 ,  H02K1/32 ,  H02K5/20 ,  H02K7/08 ,  H02K7/116 ,  H02K9/19 ,  H02K11/33 ,  H02K15/03 ,  H02K7/00

Abstract: The present disclosure relates generally to a method for balancing a rotor of an electrical engine of an electrical propulsion system comprising: identifying an axis of rotation of a rotor, wherein the rotor comprises a sacrificial layer having a mass M formed along a circumference of the rotor; determining an imbalance present in the rotor by rotating the rotor about the axis of rotation, wherein determining an imbalance includes marking the rotor, rotating the rotor, and detecting an amplitude of the imbalance; calculating an amount of mass k to add or remove at a position p along the sacrificial layer such that a center of mass of the rotor coincides with the axis of rotation of the rotor; and removing an amount of mass r from the sacrificial layer such that an amount of remainder mass n is present along the circumference of the rotor.

公开(公告)号：US12218559B2

公开(公告)日：2025-02-04

申请号：US17939958

申请日：2022-09-08

Applicant: NIDEC CORPORATION

Inventor： Daiki Shimogai ,  Takashi Shiraishi ,  Takaya Tamaki

IPC: H02K5/20 ,  B23Q11/12 ,  F16C33/66 ,  H02K5/14 ,  H02K5/173 ,  H02K7/06 ,  H02K7/08 ,  H02K7/116 ,  H02K9/193

Abstract: A drive apparatus includes: a motor having a shaft; a bearing rotatably supporting the shaft; a housing for the motor and holding the bearing in a bearing holding portion; an insulating member between the bearing and the bearing holding portion; and an oil passage. The bearing holding portion includes a holding tubular portion holding the bearing from radially outside, and a holding bottom portion extending radially inward from an end on one side in the axial direction of the holding tubular portion. The insulating member includes an insulating tubular portion extending in the axial direction along the holding tubular portion, and an insulating bottom portion extending in the radial direction along the holding bottom portion. The holding tubular portion has a penetrating portion penetrating radially inside and outside. The oil passage includes a first channel inside the penetrating portion and a second channel connecting the first channel and the bearing.

公开(公告)号：US12214671B2

公开(公告)日：2025-02-04

申请号：US18768201

申请日：2024-07-10

Applicant: SOUTHWEST JIAOTONG UNIVERSITY

Inventor： Zigang Deng ,  Zhentao Ding ,  Maoru Chi ,  Mingming Li ,  Sanchun Nie ,  Yadong Ma ,  Kaiwen Li

IPC: H02P21/00 ,  B60L13/04 ,  B60L13/10 ,  H02K7/08 ,  H02K21/24 ,  H02P21/14 ,  H02P21/18 ,  H02P21/22 ,  H02P27/12

Abstract: A rotary permanent magnet electrodynamic suspension device includes drive systems, a suspension system, an isolation layer. The drive systems are symmetrically provided in an axial direction of the suspension system. The isolation layer is provided between the suspension system and each drive system. The suspension system includes a magnetic wheel, a non-magnetic conductor and a support. The non-magnetic conductor has electromagnetic induction with the magnetic wheel. The support and the magnetic wheel are both ring-shaped, and the magnetic wheel is sleeved on an outer circumference of the support. The drive systems are configured to drive the magnetic wheel to rotate through electromagnetic induction. The magnetic wheel includes an annular array of permanent magnets to form four pole pairs based on radial magnetization and tangential magnetization. A permanent magnet electrodynamic suspension using the device is also provided.

公开(公告)号：US12214402B2

公开(公告)日：2025-02-04

申请号：US18323360

申请日：2023-05-24

Applicant: Navac Inc.

Inventor： Yourong Jiang

IPC: B21D41/02 ,  B21D19/04 ,  B21D39/12 ,  B25F5/02 ,  H02K7/08 ,  H02K7/116 ,  H02K7/14

Abstract: An electric pipe expander and intelligent control circuit for the electric pipe expander are provided. The electric pipe expander includes a pipe expander body and a mandrel sliding cavity disposed on the pipe expander body. A chuck body capable of clamping a pipe to be processed is disposed at an opening end of the mandrel sliding cavity. A mandrel is slidingly connected in the mandrel sliding cavity, an outer side end of the mandrel is provided with an obliquely disposed pipe expanding cone, an inner side end of the mandrel is provided with an elastic body accommodating cavity. Flat keys are disposed on the mandrel, and an elastic body is clamped and disposed between the flat keys and a bottom surface of the elastic body accommodating cavity.

公开(公告)号：US20250038632A1

公开(公告)日：2025-01-30

申请号：US18716658

申请日：2022-11-18

Applicant: MERCEDES-BENZ GROUP AG

Inventor： Peter APPELTAUER ,  Tobias HAERTER ,  Andreas KOLB

IPC: H02K21/24 ,  H02K5/173 ,  H02K7/08 ,  H02K9/19

Abstract: An axial flow machine for a motor vehicle includes a stator having two rotors that can be rotated in relation to the stator. The stator is arranged between the rotors in the axial direction of the axial flow machine. The rotors are connected to each other in a rotationally fixed manner by means of respective toothings of the rotors, said toothings being arranged on sides of the rotors facing towards each other in the axial direction.

公开(公告)号：US20250023434A1

公开(公告)日：2025-01-16

申请号：US18767692

申请日：2024-07-09

Applicant: XR Reserve, LLC

Inventor： Gregory Prevost ,  Edward C. Spatz ,  William W. King

IPC: H02K15/00 ,  H02K7/08

Abstract: Methods of designing downhole drilling motors are disclosed herein. The method is iterative, allowing for a custom drilling motor to be designed based on client and application specific needs.

公开(公告)号：US12199491B2

公开(公告)日：2025-01-14

申请号：US17712242

申请日：2022-04-04

Applicant: AKTIEBOLAGET SKF

Inventor： Mathieu Hubert ,  Paul Feliciano ,  Thomas Perrotin ,  Anthony Simonin

IPC: H02K5/173 ,  H02K7/08 ,  H02K11/40

Abstract: An electrical machine having a non-rotating part, a rotating part, at least one bearing supporting said rotating part and having a rotating ring and a non-rotating ring, a fiber grounding brush fixed to said non-rotating part and having a support secured to the non-rotating part and a plurality of conductive fibers having a first end secured to said support and a second free end, opposite to said first end, extending towards the rotating part, and a conductive sleeve having a base fastened to the rotating part or to the rotating ring of the bearing and a conductive layer covering at a portion of a surface of the base, the second free end of the conductive fibers of the fiber grounding brush being in contact with said conductive layer.

公开(公告)号：US12195193B2

公开(公告)日：2025-01-14

申请号：US18622643

申请日：2024-03-29

Applicant: Archer Aviation Inc.

Inventor： Alan D. Tepe ,  Alan Baldwin

IPC: B64D27/24 ,  B60L15/06 ,  B60L15/38 ,  B64C27/54 ,  B64C29/00 ,  B64D33/08 ,  B64D35/02 ,  F16B2/06 ,  F16H57/08 ,  H02K1/27 ,  H02K1/32 ,  H02K5/124 ,  H02K5/20 ,  H02K7/08 ,  H02K7/116 ,  H02K9/19 ,  H02K11/33 ,  H02K15/03 ,  H02M7/5395 ,  H02P21/00 ,  H02P25/16 ,  H02P27/06 ,  H02P27/08 ,  H02K7/00

Abstract: An electrical propulsion system for a vertical take-off and landing (VTOL) aircraft comprises an electrical motor assembly and an inverter assembly. The inverter assembly comprises a housing, a capacitor assembly, at least one printed circuit board assembly (PCBA), and a plurality of positioning pins. The capacitor assembly comprises a center hole, at least one capacitor, a capacitor housing having at least one busbar, and a plurality of through holes in the capacitor housing. The capacitor assembly and the at least one PCBA are positioned inside the housing. The plurality of positioning pins pass through the through the plurality of through holes of the capacitor housing and the at least one PCBA and are connected to the housing.

公开(公告)号：US12191749B2

公开(公告)日：2025-01-07

申请号：US17798971

申请日：2021-02-01

Applicant: SCANLAB GmbH

Inventor： Norbert Kirr ,  Tobias Edlboeck ,  Thomas Lares ,  Hans-Joachim Muenzer

IPC: H02K7/08 ,  F16C19/54 ,  F16C25/08 ,  F16C35/077

Abstract: A galvanometer drive with a rotor that is rotatable about an axis of rotation and includes a magnet, and a stator unit that surrounds the rotor and includes a coil, the rotor being supported by two bearings, at least one of which is a floating bearing, such that the rotor can perform a rotational movement relative to the stator unit about the axis of rotation. A radial movement limiting device is adapted to limit the radial movement of the floating bearing with respect to the stator unit.

公开(公告)号：US12191748B2

公开(公告)日：2025-01-07

申请号：US18568807

申请日：2022-08-05

Applicant: JAHWA ELECTRONICS CO., LTD.

Inventor： Jong Soo Ryu ,  Hyun Gyu Sung ,  Jung Hoon Jang ,  Jun Ki Lee

IPC: H02K7/06 ,  H02K3/26 ,  H02K5/173 ,  H02K7/08 ,  H02K21/24

Abstract: A vibration motor is provided. The vibration motor comprises: a rotor shaft; a first magnet and a second magnet arranged on the rotor shaft so as to face each other; a circuit board having a hollow hole through which the rotor shaft passes and coils arranged thereon, the coils respectively facing the first and second magnets; a housing forming an inner space in which the rotor shaft and the circuit board are mounted; a shaft passing through the rotor shaft and fixedly erected in the housing; a first yoke and a second yoke on which the first and second magnets are respectively installed and which are fixedly coupled to the rotor shaft so as to integrally rotate along with the rotor shaft; a weight installed on the first yoke or the second yoke; and a bearing portion comprising a plurality of bearings coaxially arranged with the shaft.