公开(公告)号：US11927231B2

公开(公告)日：2024-03-12

申请号：US17863142

申请日：2022-07-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Heewook Lee ,  Zhongyi Liu ,  Anil K. Sachdev ,  Tyson Whittier Brown ,  Ratandeep Singh Kukreja

IPC: F16D65/12 ,  C22C21/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14

CPC classification number: F16D65/125 ,  C22C21/04 ,  C22C38/02 ,  C22C38/06 ,  C22C38/14 ,  F16D2200/0047 ,  F16D2200/0082

Abstract: A brake rotor having a composite structure may include an annular body defining opposite friction surfaces of the brake rotor. The annular body may include a core made of an Al—Si alloy, a thermal barrier layer made of a thermally insulating material disposed on the core, and a wear-resistant layer made of an Fe—Al—Si—Zr alloy disposed on the core over the thermal barrier layer. The wear-resistant layer may define a first one of the opposite friction surfaces of the annular body.

公开(公告)号：US11904376B2

公开(公告)日：2024-02-20

申请号：US16940452

申请日：2020-07-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Erik B. Golm ,  Louis G. Hector, Jr. ,  Anil K. Sachdev ,  Andrew C. Bobel ,  Kevin B. Rober ,  Jianfeng Wang

IPC: B21D37/10 ,  B21D37/16 ,  B21D13/02 ,  B62D21/15

CPC classification number: B21D37/10 ,  B21D13/02 ,  B21D37/16 ,  B62D21/15 ,  Y10T428/12417

Abstract: An energy-dissipating cover for covering a component sensitive to mechanical impulse includes a sheet of selected ferrous or aluminum alloy, the sheet having a top surface, a bottom surface, an outer perimeter, an overall area within the outer perimeter and a nominal thickness of no more than 2.5 mm. The sheet is configured for connection with one or more external structures at a plurality of connection points within the outer perimeter, wherein the overall area comprises a plurality of supported areas and at least one unsupported area. Embossments are formed within the at least one unsupported area and extend outward from the bottom surface. The embossments are shaped, sized and arranged so as to limit orthogonal deflection of the sheet from a mechanical impulse directed normal to the bottom surface of the sheet at the plurality of embossments.

公开(公告)号：US11715999B2

公开(公告)日：2023-08-01

申请号：US17127158

申请日：2020-12-18

Applicant: GM Global Technology Operations LLC

Inventor： Anil K. Sachdev ,  Chengwu Duan ,  Alireza Fatemi

IPC: H02K15/02 ,  H02K1/12

CPC classification number: H02K15/02 ,  H02K1/12

Abstract: A method to make a stator lamination of an axial flux motor for an automobile vehicle includes: constructing a stator having multiple stator stack members, including: providing a stator lamination with individual ones of the stator stack members; forming the stator lamination from a single lamination sheet of steel defining a sinuous-shaped assembly having multiple bends; compressing the stator lamination; and machining the stator lamination to create a first edge by removing a first portion of the multiple bends and to create a second edge opposite to the first edge by removing a second portion of the multiple bends.

公开(公告)号：US20220039278A1

公开(公告)日：2022-02-03

申请号：US16940452

申请日：2020-07-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Erik B. Golm ,  Louis G. Hector, JR. ,  Anil K. Sachdev ,  Andrew C. Bobel ,  Kevin B. Rober ,  Jianfeng Wang

IPC: H05K5/02 ,  B21D37/10 ,  B21D37/16

Abstract: An energy-dissipating cover for covering a component sensitive to mechanical impulse includes a sheet of selected ferrous or aluminum alloy, the sheet having a top surface, a bottom surface, an outer perimeter, an overall area within the outer perimeter and a nominal thickness of no more than 2.5 mm. The sheet is configured for connection with one or more external structures at a plurality of connection points within the outer perimeter, wherein the overall area comprises a plurality of supported areas and at least one unsupported area. Embossments are formed within the at least one unsupported area and extend outward from the bottom surface. The embossments are shaped, sized and arranged so as to limit orthogonal deflection of the sheet from a mechanical impulse directed normal to the bottom surface of the sheet at the plurality of embossments.

公开(公告)号：US20220037944A1

公开(公告)日：2022-02-03

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 ,  H02K7/00 ,  H02K1/02 ,  H02K1/27 ,  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：US11031161B2

公开(公告)日：2021-06-08

申请号：US15977545

申请日：2018-05-11

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

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

IPC: H01F1/03 ,  B29C64/268 ,  B33Y80/00 ,  C01B21/06

Abstract: A three-dimensional object made of a bulk nitride, carbide, or boride-containing material 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. In one form, the three-dimensional object may comprise a permanent magnet made up of a plurality of solid layers of fused iron nitride material having a magnetic Fe16N2 phase.

公开(公告)号：US20200377370A1

公开(公告)日：2020-12-03

申请号：US16428993

申请日：2019-06-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mahmoud Abd Elhamid ,  Andrew C. Bobel ,  Anil K. Sachdev ,  Mark W. Verbrugge ,  Nicholas P. Pieczonka ,  James R. Salvador

IPC: C01B33/021 ,  C01B33/037

Abstract: Systems, methods and compositions to produce fine powders are described. These include forming a hypereutectic melt including a target material, a sacrificial-matrix material, and an impurity, rapidly cooling the hypereutectic melt to form a hypereutectic alloy having a first phase and a second phase, annealing the hypereutectic alloy to alter a morphology of the target material to thereby produce target particles, and removing the sacrificial matrix to thereby produce a fine powder of the target particles. The first phase is defined by the target material and the second phase is defined by the sacrificial-matrix material. The sacrificial-matrix material forms a sacrificial matrix having the target material dispersed therethrough.

公开(公告)号：US10514036B2

公开(公告)日：2019-12-24

申请号：US15659088

申请日：2017-07-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Tyson W. Brown ,  Anil K. Sachdev ,  Carnell E. Williams

IPC: F04C18/08 ,  F04C29/12 ,  F04C29/00 ,  F02B33/38 ,  F04C18/56 ,  F04C18/16 ,  F04C18/12

Abstract: A rotor for a positive displacement compressor assembly having a housing defining an inlet, an outlet, and a rotor cavity in communication with the inlet and the outlet. The rotor may comprise a rotor body and a porous inner core enclosed within the rotor body. The rotor may comprise a tapered rotor body having an outer radius that decreases from a first end to a second end thereof. In one form, the positive displacement compressor assembly may comprise a supercharger assembly for an internal combustion engine.

公开(公告)号：US10384252B2

公开(公告)日：2019-08-20

申请号：US15114955

申请日：2015-02-17

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anil K. Sachdev ,  John T. Carter ,  Raja K. Mishra ,  John E. Carsley

IPC: B21D22/02 ,  B21D53/88 ,  C22F1/04 ,  C21D1/673

Abstract: Methods suitable for forming complex parts from work-hardened sheet materials of limited formability are described. The formability of the work-hardened sheet is enhanced by forming at elevated temperature. The forming temperature is preferably selected to minimally undo the effects of work hardening so that the formed part is of higher strength than a like part formed from an annealed sheet. The method is applicable to age-hardening and non-age-hardening aluminum and magnesium alloys.

公开(公告)号：US10378599B2

公开(公告)日：2019-08-13

申请号：US15643004

申请日：2017-07-06

Applicant: GM Global Technology Operations LLC

Inventor： Christopher J. Mettrick ,  Mark T. Riefe ,  Michael L. Holly ,  James A. Webster ,  Michael J. Walker ,  Anil K. Sachdev

IPC: F16D65/12 ,  B60R13/00 ,  F16D65/02

Abstract: A brake rotor comprising a brake pad wear surface; a hat surface; and a decorative insert comprising an insert material, the decorative insert disposed on the brake pad wear surface, the hat surface, or both; wherein at least one of a friction coefficient between the decorative insert and a brake pad is substantially the same as a friction coefficient between the brake pad wear surface and the brake pad, a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the brake pad wear surface, or a wear rate of the decorative insert is substantially the same as or greater than a wear rate of the hat surface; and at least a portion of the decorative insert is visible on the brake pad wear surface, the hat surface, or both.