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公开(公告)号：US20250158465A1
公开(公告)日：2025-05-15
申请号：US18509914
申请日：2023-11-15
Applicant: GM Global Technology Operations LLC
Inventor： Alireza Fatemi , Eric C. Clough , Thomas W. Nehl , Wesley G. Zanardelli , David A. Smith
Abstract: A radial flux electric motor includes a stator having a radially inner stator surface and stator windings arranged thereon. The motor also includes a rotor mounted inside the stator and configured to rotate relative thereto about an axis. The rotor has a rotor core constructed from a ferromagnetic material having relatively high magnetic permeability and defined by a rotor outer surface establishing an airgap between the rotor and the stator. The rotor also has a plurality of magnetic poles set in the rotor core and configured to generate magnetic flux. The rotor additionally has inserts constructed from a material having relatively low magnetic permeability in at least one geometric direction. Each insert is mechanically fixed to the rotor core to thereby control magnetic flux distribution and minimize flux leakage inside the rotor.
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公开(公告)号：US12287358B2
公开(公告)日：2025-04-29
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
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.
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公开(公告)号：US20240348113A1
公开(公告)日：2024-10-17
申请号：US18300841
申请日：2023-04-14
Applicant: GM Global Technology Operations LLC
Inventor： Alireza Fatemi , Farzad Samie , Thomas W. Nehl , Chandra S. Namuduri , Gokhan Cakal
Abstract: An electric propulsion motor system includes a cylindrical stator and rotor, a fluid circulation system providing pressurized fluid, and conductors within winding slots. The stator has a yoke and a plurality of teeth extending radially inward from the yoke, with winding slots defined between adjacent teeth. Respective tooth tips extend circumferentially into adjacent winding slots and are radially adjacent to a first conductor within the winding slot, with a first channel through which pressurized fluid flows.
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公开(公告)号：US12036884B2
公开(公告)日：2024-07-16
申请号：US17350696
申请日：2021-06-17
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi Prasad , Chandra S. Namuduri , Suresh Gopalakrishnan , Thomas W. Nehl , David J. Brooks
CPC classification number: B60L53/60 , B60L50/60 , B60L2210/40 , B60L2240/12
Abstract: A charging system includes a scalable power source for powering a motor of a vehicle and telematics and battery management modules. The scalable power source includes: N battery packs, where N is an integer greater than or equal to 3; and multiple switches connected to the N battery packs including N−1 switches for serially connecting the N battery packs between supply and return lines and a multiple of N switches for parallel connecting the N battery packs to the supply and return lines. The telematics module requests capability of a charging station and receives a response signal from a device indicating the capability of the charging station. The battery management module: based on the capability of the charging station, selects one of the available arrangements in which to connect the N battery packs, sets states of the multiple switches; and then charges the N battery packs based on the states.
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公开(公告)号：US20240128845A1
公开(公告)日：2024-04-18
申请号：US17975957
申请日：2022-10-28
Applicant: GM Global Technology Operations LLC
Inventor： Jian Yao , Chengwu Duan , Denghao Fan , Vincent Fedida , Thomas W. Nehl
CPC classification number: H02K29/03 , B60L50/60 , H02K21/24 , H02K2201/06
Abstract: A member for an axial flux electric machine, in accordance with a non-limiting example, includes a support member having a first surface, a second surface opposite the first surface, an outer annular edge, and an inner annular edge that defines an opening having a center point. A plurality of members is mounted on one of the first surface and the second surface. Each of the plurality of members has a centerline that passes through the outer annular edge and the inner annular edge without passing through the center point creating a torque ripple reducing asymmetry in the member.
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Patent Agency Ranking
公开(公告)号：US11936239B2
公开(公告)日：2024-03-19
申请号：US17116661
申请日：2020-12-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Alireza Fatemi , Anil K. Sachdev , Jian Yao , Anthony M. Coppola , Thomas W. Nehl , Chengwu Duan
CPC classification number: H02K1/02 , H01F1/032 , H01F1/053 , H01F41/0253 , H01F41/0266 , H02K1/2793 , H02K1/32 , H02K15/03 , H02K21/24
Abstract: A bi-material permanent magnet for an electric machine includes a core including a first magnetic material and a shell portion located on the core and made of a second magnetic material. The first magnetic material comprises a magnet material with an energy less than 20 Mega Gauss Oersteds (MGOe). The second magnetic material comprises a magnet material with an energy greater than 30 MGOe.
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公开(公告)号：US20230313771A1
公开(公告)日：2023-10-05
申请号：US17708125
申请日：2022-03-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Thomas W. Nehl , Avoki M. Omekanda , Suresh Gopalakrishnan
CPC classification number: F02M61/06 , F02M51/0664 , F02M57/005 , F02M61/166 , F02M61/188 , F02M61/168 , F02M2200/24 , F02M2200/8084 , F02M2200/9053
Abstract: A valve system of a vehicle includes: a housing that is electrically conductive and made of a metal and that includes: an inlet configured to receive a fluid; an outlet configured to output the fluid; and a fluid channel fluidly connecting the inlet and the outlet; a pintle disposed within the housing and that is electrically conductive and made of a metal; a ball that is mechanically fastened to the pintle, that is configured to close the outlet, and that is electrically conductive and made of a metal; an armature that is mechanically fastened to the pintle, that is disposed within the housing, and that is electrically conductive and made of a metal; a solenoid coil that is disposed within the housing and that surrounds the pintle; and an electrically insulative material configured to insulate the pintle from the housing.
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公开(公告)号：US20230291288A1
公开(公告)日：2023-09-14
申请号：US17648568
申请日：2022-01-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Alireza Fatemi , Thomas W. Nehl , Huaxin Li , Anil K. Sachdev
Abstract: A rotor for an electric machine includes strengthened structural elements effected through surface alloying and heating via an induction heating fixture. A rotor includes laminations formed to have internal cavities and structural members adjacent the cavities. A number of the laminations are stacked to form a lamination stack. An alloying material is applied to the lamination stack at the structural members. The lamination stack is placed in a fixture so that an inductor extends along the structural members and cooling elements extend through the cavities. A current is applied to the inductor to heat the structural members, alloying the alloying material into the structural members.
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公开(公告)号：US11545860B2
公开(公告)日：2023-01-03
申请号：US17181193
申请日：2021-02-22
Applicant: GM Global Technology Operations LLC
Inventor： Derek F. Lahr , Alireza Fatemi , Farzad Sarnie , Thomas W. Nehl
Abstract: A rotor core for an electric motor includes a core stack including a plurality of lamination plates, each lamination plate including a plurality of apertures formed therein, the plurality of apertures of each of the lamination plates axially aligned and defining a plurality of axial magnet slots extending through the core stack and adapted to support a plurality of permanent magnets therein, and at least one insert extending axially through the core stack and adapted to provide radial structural stability to the plurality of lamination plates to prevent portions of the plurality of lamination plates adjacent the plurality of magnet slots from flexing due to radial forces exerted on the plurality of lamination plates during operation of the electric motor.
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公开(公告)号：US20220285959A1
公开(公告)日：2022-09-08
申请号：US17194828
申请日：2021-03-08
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Benjamin Christian , Thomas W. Nehl , Rashmi Prasad
Abstract: A mobile power source apparatus includes a mobile unit having a platform structure, a frame connected to the platform structure and multiple wheels rotatably connected to the platform structure to promote moving the mobile unit. An electronics power module is connected to a DC power source defining a high voltage DC battery. The electronics power module converts DC energy of the DC battery to at least one of an alternating current (AC) power and a direct current (DC) power. A wireless communication device promotes wireless communication of a battery state-of-charge (SOC) of the high voltage DC battery. A liquid cooling thermal system provides positive cooling of the electronics power module.
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