公开(公告)号：US20240372425A1

公开(公告)日：2024-11-07

申请号：US18310780

申请日：2023-05-02

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Thomas W Nehl ,  Anil K Sachdev ,  Anthony Michael Coppola ,  Gokhan Cakal

IPC: H02K3/02

Abstract: An electric machine includes a stator, a rotor configured to rotate relative to the stator, an air gap between the stator and the rotor, and a conductive winding disposed in the rotor or the stator. The conductive winding includes a first portion having a first conductivity and a second portion having a second conductivity, the second portion disposed radially between the first portion and the air gap, the first conductivity being different than the second conductivity.

公开(公告)号：US11007713B2

公开(公告)日：2021-05-18

申请号：US15497832

申请日：2017-04-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John P Spicer ,  Jason J Nolte ,  Thomas A. Perry ,  Blair E Carlson ,  Anil K Sachdev ,  Hyungmin Chae ,  Mark A Smith

IPC: B29C64/20 ,  B33Y30/00 ,  B33Y40/00 ,  B29C64/153 ,  B22F12/00 ,  B29C64/241 ,  B29C64/171 ,  B29K105/00

Abstract: An additive manufacturing system includes a powder delivery system, an area scanning laser, a build chamber, and a controller. The powder delivery system provides a predetermined amount of powder material to the build chamber, and includes a material dispenser, a dispensing head, and a scraper. The scanning laser selectively sinters the powder material, and includes a mirror galvanometer for raster scanning. The build chamber has an annular configuration, and includes an inner annular wall that defines a central portion disposed inward of the build chamber. A portion of the delivery system and the laser are located in the central portion. The chamber continuously rotates under the head and under a sintering zone generated by the laser as the delivery system continuously dispenses the material. The laser continuously raster scans the material at the sintering zone in a raster pattern to sinter a layer of material directly to a preceding layer.

公开(公告)号：US12074485B2

公开(公告)日：2024-08-27

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

IPC: H02K15/02 ,  H02K1/276 ,  H02K15/03 ,  H02K15/10 ,  H02K15/12

CPC classification number: H02K15/03 ,  H02K1/276 ,  H02K15/12

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.

公开(公告)号：US11780160B2

公开(公告)日：2023-10-10

申请号：US17337863

申请日：2021-06-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anil K Sachdev ,  Frederick E Pinkerton ,  Raja K Mishra ,  Tyson W Brown

IPC: B29C64/153 ,  H01F1/03 ,  B29C64/268 ,  B33Y70/00 ,  B22F10/28 ,  B22F10/38 ,  B22F10/50 ,  B33Y80/00 ,  C01B21/06 ,  B22F12/70 ,  B22F10/32 ,  B22F10/62

CPC classification number: B29C64/153 ,  B22F10/28 ,  B22F10/38 ,  B22F10/50 ,  B29C64/268 ,  B33Y70/00 ,  H01F1/0311 ,  B22F10/32 ,  B22F10/62 ,  B22F12/70 ,  B33Y80/00 ,  C01B21/0622

Abstract: A three-dimensional object may be manufactured using a powder bed fusion additive manufacturing technique. A layer of powder feed material may be distributed over a solid substrate and scanned with a high-energy laser beam to locally melt selective regions of the layer and form a pool of molten feed material. The pool of molten feed material may be exposed to gaseous nitrogen, carbon, or boron to respectively dissolve nitride, carbide, or boride ions into the pool of molten feed material to produce a molten nitrogen, carbon, or boron-containing solution. The molten nitrogen, carbon, or boron-containing solution may cool and solidify into a solid layer of fused nitride, carbide, or boride-containing material.

公开(公告)号：US20210296027A1

公开(公告)日：2021-09-23

申请号：US17337863

申请日：2021-06-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anil K Sachdev ,  Frederick E Pinkerton ,  Raja K Mishra ,  Tyson W Brown

IPC: H01F1/03 ,  B29C64/268

Abstract: A three-dimensional object may be manufactured using a powder bed fusion additive manufacturing technique. A layer of powder feed material may be distributed over a solid substrate and scanned with a high-energy laser beam to locally melt selective regions of the layer and form a pool of molten feed material. The pool of molten feed material may be exposed to gaseous nitrogen, carbon, or boron to respectively dissolve nitride, carbide, or boride ions into the pool of molten feed material to produce a molten nitrogen, carbon, or boron-containing solution. The molten nitrogen, carbon, or boron-containing solution may cool and solidify into a solid layer of fused nitride, carbide, or boride-containing material.