公开(公告)号：US20250030300A1

公开(公告)日：2025-01-23

申请号：US18355743

申请日：2023-07-20

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William T. Ivan ,  Alireza Fatemi ,  Rajeev Vyas ,  Alan Del Rio ,  Rebecca K. Risko Cattell

IPC: H02K5/08 ,  H02K15/14

Abstract: A multi-phase, multi-pole permanent magnet motor/generator (electric machine) is described, and includes a rotor disposed on a rotor shaft within an annular stator, which may be arranged in a housing with an interposed insulator system. The insulator system is arranged to mitigate and isolate common mode currents in a shaft bearing system by insulating the stator core from an electrical ground return path of an electrical driving source. The electric machine includes a rotor rotatably disposed within a stator, and the stator is secured to the housing with the insulator system interposed therebetween.

公开(公告)号：US20240408974A1

公开(公告)日：2024-12-12

申请号：US18332223

申请日：2023-06-09

Applicant: GM Global Technology Operations LLC

Inventor： Muhammad Hussain Alvi ,  Suresh Gopalakrishnan ,  Alireza Fatemi ,  Renato Amorim Torres ,  Chunhao J. Lee ,  Junghoon Kim

IPC: B60L15/20 ,  H02P27/08

Abstract: A motor system includes a rechargeable energy storage system, an alternating current motor, and a power inverter. Multiple efficiency maps may be provided, each representing a specific combination of control parameters and associated settings. The maps relate the motor's operating space (torque and speed) to corresponding efficiency solutions. The combination of control parameters and settings that yields the highest motor system efficiency at an operating point may be determined from the multiple efficiency maps and used in controlling the motor.

公开(公告)号：US12142960B2

公开(公告)日：2024-11-12

申请号：US17839691

申请日：2022-06-14

Applicant: GM Global Technology Operations LLC

Inventor： Mohamed Kamel ,  Muhammad Hussain Alvi ,  Alireza Fatemi ,  Chandra S. Namuduri ,  Rashmi Prasad

IPC: H02J7/00 ,  H02J7/14 ,  H02M1/00 ,  H02P25/022

Abstract: A method and apparatus for electrical energy transfer between a pair of series connected batteries coupled between positive and negative DC rails of a power inverter operatively connected to a plurality of stator phase windings of a stator winding of a motor may include coupling a midpoint of the pair of series connected batteries to the stator winding of the motor, and controlling the power inverter to operate the power inverter and the stator winding as a switched-mode power converter to charge at least one of the stator phase windings from one of the pair of series connected batteries and to discharge the at least one of the stator phase windings to the other of the pair of series connected batteries.

公开(公告)号：US12062946B2

公开(公告)日：2024-08-13

申请号：US17374244

申请日：2021-07-13

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Anthony Michael Coppola ,  Derek Frei Lahr ,  Kestutis A. Sonta

IPC: H02K1/28 ,  H02K1/32

CPC classification number: H02K1/28 ,  H02K1/32

Abstract: A rotor for an electric machine includes a rotor body formed from a plurality of stacked laminations defining a first axial end and an opposing second axial end. Each of the plurality of stacked laminations includes a plurality of openings that are aligned so as to define a plurality of passages through the rotor body. A plurality of reinforcement elements extend through the plurality of stacked laminations. Each of the plurality of reinforcement elements is arranged in a corresponding one of the plurality of passages and includes a first end portion and a second end portion. The first end portion and the second end portion of select ones of the plurality of reinforcement elements extend outwardly of the first axial end and the second axial end.

公开(公告)号：US20240235328A1

公开(公告)日：2024-07-11

申请号：US18151504

申请日：2023-01-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Farzad Samie ,  Peng Peng ,  Xiaofeng Yang ,  Alireza Fatemi

IPC: H02K9/19 ,  B60K11/02

CPC classification number: H02K9/19 ,  B60K11/02

Abstract: Embodiments include a system for cooling an electric motor and a vehicle including the same. The system for cooling the electric motor includes a pump configured to circulate a conductive cooling fluid through one or more portions of the electric motor and a heat exchanger configured to receive and cool the conductive cooling fluid received from the electric motor.

公开(公告)号：US20240094267A1

公开(公告)日：2024-03-21

申请号：US17946332

申请日：2022-09-16

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Muhammad Hussain Alvi ,  Thomas W. Nehl

IPC: G01R19/18 ,  B60L3/12

CPC classification number: G01R19/18 ,  B60L3/12 ,  B60L2210/44

Abstract: A current sensing apparatus may include a common mode core surrounding two or more current conductors and a current sensing element proximate the common mode core.

公开(公告)号：US20240072601A1

公开(公告)日：2024-02-29

申请号：US17898672

申请日：2022-08-30

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Velmurugan Ayyanar

IPC: H02K5/173 ,  H02K5/15 ,  H02K7/08

CPC classification number: H02K5/1732 ,  H02K5/15 ,  H02K7/083

Abstract: An enclosure for a rotary electric machine may include a housing supporting a stator of the electric machine and first and second end plates attached to the housing and rotatably supporting a rotor at opposite ends with respective first and second bearings isolated from the end plates.

公开(公告)号：US11872906B2

公开(公告)日：2024-01-16

申请号：US17313257

申请日：2021-05-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Thomas W. Nehl ,  Chandra S. Namuduri ,  Lei Hao ,  Norman K. Bucknor ,  Rashmi Prasad

IPC: B60L58/19 ,  B60K1/00 ,  B60L3/04 ,  B60K35/00 ,  H02J7/14 ,  H02P29/032 ,  H02P29/024 ,  H02P29/60 ,  B60L15/20 ,  H02P29/028

CPC classification number: B60L58/19 ,  B60K1/00 ,  B60K35/00 ,  B60L3/04 ,  B60L15/20 ,  H02J7/1423 ,  H02P29/024 ,  H02P29/032 ,  H02P29/60 ,  B60K2001/006 ,  B60K2370/169 ,  B60L2240/425 ,  B60L2250/00 ,  H02P29/028

Abstract: An electric propulsion system includes a rotary electric machine having an output member, a rechargeable energy storage system (“RESS”) connected to the electric machine, a user interface device, and a controller. The RESS includes multiple battery modules and a switching circuit, the latter being configured, in response to electronic switching control signals, to connect the battery modules in a parallel-connected configuration or a series-connected configuration, as a selected battery configuration. The user interface device receives an operator-requested drive mode request as an electrical signal indicative of a desired drive mode of the electric propulsion system. The controller, which is programmed with mode-specific electrical loss information associated with the desired drive mode, establishes the selected battery configuration in response to the drive mode request, and presents a drive mode recommendation via the user interface device when the loss information associated with the desired drive mode exceeds a calibrated loss threshold.

公开(公告)号：US11817748B2

公开(公告)日：2023-11-14

申请号：US16944578

申请日：2020-07-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Anil K. Sachdev ,  Thomas W. Nehl

IPC: H02K1/30 ,  H02K1/02 ,  H02K1/27 ,  H02K15/03 ,  H02K7/00 ,  H02K1/276

CPC classification number: H02K1/30 ,  H02K1/02 ,  H02K1/276 ,  H02K7/006 ,  H02K15/03

Abstract: A method for constructing a lamination for a rotary electric machine includes forming an annular lamination from a ferrous core material having a first relative magnetic permeability. The lamination defines through-openings, e.g., for permanent magnets or conductors. Peripheral bridges of the core material extend between the through-openings and an outer or inner diameter surface of the lamination. The method includes diffusing an alloy material having a second relative magnetic permeability into the bridges to form austenitic bridges, with the second relative magnetic permeability being less than the first relative magnetic permeability. A rotary electric machine includes a stator and rotor. A vehicle includes a rotary electric machine connected to the battery pack and to road wheels, and having a rotor and/or a stator constructed in accordance with the method.

公开(公告)号：US11621621B2

公开(公告)日：2023-04-04

申请号：US17081390

申请日：2020-10-27

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jian Yao ,  Chengwu Duan ,  Yusheng Zou ,  Alireza Fatemi

IPC: H02K21/24 ,  H02K1/2793 ,  H02K1/14

Abstract: An axial flux motor includes: a stator having a first side and a second side opposite the first side, the stator including: N stator core components on the first side, where N is an integer greater than two; and pole shoes attached to radial sides of the N stator core components, N slot openings between adjacent ones of the pole shoes, where each of the N slot openings extends in at least one direction non-radially on the first side; and a rotor including a third side and M permanent magnets on the third side, where the first side is parallel to the third side, and where M is an integer greater than two.