Patents by Inventor M. Rahman

M. Rahman has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9766683
    Abstract: A processor includes at least one core, a power control unit, and a first interconnect to couple with a peripheral controller. The first interconnect is to provide a first uni-directional communication path for communication of first power management data from the processor to the peripheral controller. Other embodiments are described and claimed.
    Type: Grant
    Filed: September 20, 2016
    Date of Patent: September 19, 2017
    Assignee: Intel Corporation
    Inventors: Shaun M. Conrad, William Knolla, Douglas R. Moran, Sm M. Rahman, Jawad Haj-Yihia, Alon Naveh, Ohad Falik
  • Patent number: 9755462
    Abstract: An interior permanent magnet machine includes a wound stator, and a rotor core defining a plurality of pole cavities. Each of the pole cavities includes a cross section, perpendicular to a central axis of rotation, that defines a cross sectional shape having a centerline. The cross sectional shape of each of the pole cavities includes a radially inner barrier portion, a radially outer barrier portion, and a central portion. The centerline of the cross sectional shape of each of the radially outer barrier portion and the radially inner barrier portion, of each pole cavity, is defined by a generally arcuate segment. The centerline of the cross sectional shape of the central portion, of each pole cavity, is defined by a linear segment. One of a plurality of rare earth magnets, having no heavy rare earth elements, is disposed within the central portion of one of the plurality of pole cavities.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: September 5, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Sinisa Jurkovic, Khwaja M. Rahman
  • Publication number: 20170229934
    Abstract: An interior permanent magnet electric machine is described, and includes a stator including a plurality of electrical windings and a rotor disposed in a cylindrically-shaped void formed within the stator. The rotor includes a plurality of steel laminations assembled onto a shaft, wherein the shaft defines a longitudinal axis. Each of the steel laminations includes a plurality of poles and each of the poles includes a plurality of slots disposed near an outer periphery. The slots of the steel laminations are longitudinally aligned. A plurality of permanent magnets are disposed in a first subset of the slots, and plurality of packets assembled from anisotropic material are disposed in a second subset of the slots.
    Type: Application
    Filed: May 4, 2016
    Publication date: August 10, 2017
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Khwaja M. Rahman, Constantin C. Stancu, Peter J. Savagian, Nitinkumar R. Patel, Robert T. Dawsey
  • Publication number: 20170229928
    Abstract: A synchronous reluctance electric machine is described, and includes a stator including a plurality of electrical windings and a rotor disposed in a cylindrically-shaped void formed within the stator. The rotor includes a plurality of steel laminations assembled onto a shaft, wherein the shaft defines a longitudinal axis. Each of the steel laminations includes a plurality of poles and each of the poles includes a plurality of slots disposed near an outer periphery. The slots of the steel laminations are longitudinally aligned. A plurality of packets assembled from anisotropic material are disposed in the slots.
    Type: Application
    Filed: May 4, 2016
    Publication date: August 10, 2017
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Constantin C. Stancu, Peter J. Savagian, Khwaja M. Rahman, Nitinkumar R. Patel, Robert T. Dawsey
  • Patent number: 9712005
    Abstract: An interior permanent magnet machine includes a rotor having a plurality of slots. First and second slots are disposed in a first pole and the third and fourth slots are disposed in a second pole. A first angle is defined between respective centerlines of the first and second slots. A second angle is defined between respective centerlines of the third and fourth slots. The first angle is configured to be sufficiently different from the second angle so that torque ripple is reduced. Thus the rotor is configured such that the angular configuration of slots in a first pole is different from the angular configuration of slots in a second pole of the rotor.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: July 18, 2017
    Assignee: GM Global Technology Operations LLC
    Inventors: Khwaja M. Rahman, Sinisa Jurkovic, Edward L. Kaiser, Peter J. Savagian
  • Publication number: 20170030464
    Abstract: An exemplary shift lever includes a mounting assembly, a flexible member coupled to the mounting assembly, and an interface coupled to the flexible member. The flexible member is resilient so as to provide a selected biasing force at a predetermined deformation angle, and flexible enough to elastically deform across a selected angular range. The mounting assembly is configured for connection with me input shaft of a transmission, and the interface is configured for connection with an output of a drive selector.
    Type: Application
    Filed: October 11, 2016
    Publication date: February 2, 2017
    Inventors: Brian M. Rahman, Jim Foral, Mike MacConney, Richard Marcus Mansfield
  • Publication number: 20170010648
    Abstract: A processor includes at least one core, a power control unit, and a first interconnect to couple with a peripheral controller. The first interconnect is to provide a first uni-directional communication path for communication of first power management data from the processor to the peripheral controller. Other embodiments are described and claimed.
    Type: Application
    Filed: September 20, 2016
    Publication date: January 12, 2017
    Inventors: Shaun M. Conrad, William Knolla, Douglas R. Moran, Sm M. Rahman, Jawad Haj-Yihia, Alon Naveh, Ohad Falik
  • Patent number: 9520753
    Abstract: A stator assembly includes a plurality of stator slots defining multiple slot layers. The assembly includes a plurality of hairpins each having a respective first leg positioned in one of the multiple slot layers and a respective second leg positioned in another of the multiple slot layers. Each hairpin is configured to allow a current to flow from the respective first leg to the respective second leg. The plurality of hairpins is divided into multiple hairpin layers. The hairpins form multiple winding sets, such as first, second, third and fourth winding sets. Each of the winding sets at least partially includes the hairpins from at least two of the multiple hairpin layers. The multiple slot layers may include six slot layers. The multiple hairpin layers may include six hairpin layers. Thus, at least one of the hairpin layers may be “shared” by two winding sets.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: December 13, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Khwaja M. Rahman, Edward L. Kaiser, Sinisa Jurkovic, Peter J. Savagian
  • Publication number: 20160344274
    Abstract: An internal permanent magnet machine includes a wound stator, and a rotor core. The rotor core includes a plurality of first pole cavities, and a plurality of second pole cavities. One of a plurality of magnets is disposed within each of the pole cavities, and is injection molded into their respective cavity. The first pole cavities and the second pole cavities are each arranged in a pre-defined configuration, such that each pole cavity of the first pole cavities is identically positioned with one of the pole cavities of the second pole cavities within their respective pre-defined configurations, to define a corresponding pair of pole cavities. The pole cavity of the first pole cavities and the pole cavity of the second pole cavities of at least one of the corresponding pair of pole cavities define a different shape relative to each other.
    Type: Application
    Filed: May 18, 2015
    Publication date: November 24, 2016
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sinisa Jurkovic, Khwaja M. Rahman
  • Patent number: 9482289
    Abstract: An exemplary shift lever includes a mounting assembly, a flexible member coupled to the mounting assembly, and an interface coupled to the flexible member. The flexible member is resilient so as to provide a selected biasing force at a predetermined deformation angle, and flexible enough to elastically deform across a selected angular range. The mounting assembly is configured for connection with the input shaft of a transmission, and the interface is configured for connection with an output of a drive selector.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: November 1, 2016
    Assignee: Club Car, LLC
    Inventors: Brian M. Rahman, Jim Foral, Mike MacConney, Richard Marcus Mansfield
  • Patent number: 9477627
    Abstract: A processor includes at least one core, a power control unit, and a first interconnect to couple with a peripheral controller. The first interconnect is to provide a first uni-directional communication path for communication of first power management data from the processor to the peripheral controller. Other embodiments are described and claimed.
    Type: Grant
    Filed: December 26, 2012
    Date of Patent: October 25, 2016
    Assignee: Intel Corporation
    Inventors: Shaun M. Conrad, William Knolla, Douglas R. Moran, SM M. Rahman, Jawad Haj-Yihia, Alon Naveh, Ohad Falik
  • Publication number: 20160285334
    Abstract: An electric device and a stator assembly for the electric device includes a stator core defining a plurality of slots spaced from each other. The stator assembly includes a plurality of bar conductors disposed in each of the slots and arranged to present a first winding path, a second winding path and a third winding path. A first set of the bar conductors of the first, second and third winding paths are configured to receive current in a parallel circuit arrangement. The stator assembly also includes a plurality of electrical jumpers electrically connected to a predetermined number of the bar conductors such that an amount of current flowing through the first winding path and the third winding path is substantially the same and an amount of current flowing through the second winding path is different from the amount of current flowing through the first and third winding paths.
    Type: Application
    Filed: March 26, 2015
    Publication date: September 29, 2016
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Paul F. Turnbull, Edward L. Kaiser, Matthew D. Laba, Khwaja M. Rahman, Rolf Blissenbach
  • Publication number: 20160276885
    Abstract: An interior permanent magnet machine includes a rotor having a central axis and a plurality of axial segments. The axial segments include a first axial segment and a second axial segment positioned adjacent to each other in an axial direction. Each of the axially-spaced segments includes at least one pole defining a respective angular configuration characterized by respective first, second and third angles. The first axial segment defines a first set of angular configurations and the second axial segment defines a second set of angular configurations. The rotor is configured to have an axially asymmetric configuration such that the first set of angular configurations is different from the second set of angular configurations.
    Type: Application
    Filed: July 1, 2015
    Publication date: September 22, 2016
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sinisa Jurkovic, Mohammad Faizul Momen, Khwaja M. Rahman
  • Patent number: 9444298
    Abstract: A bar wound stator includes a stator core defining a plurality of slots. Bar-type conductors are disposed within each slot. Each slot includes a slot liner and an insulator cap. Each slot liner includes an end portion disposed against an inner wall surface, and side portions disposed against a first wall surface and a second wall surface respectively. Each insulator cap includes a base portion disposed against an outer wall surface, and side portions disposed against the first wall surface and the second wall surface respectively. The side portions of the insulator cap in each slot overlap the side portions of the slot liner in each slot along the first wall surface and the second wall surface respectively. Each slot includes a recessed feature in each of the first wall surface and the second wall surface to accommodate the overlapping side portions of the insulator cap and the slot liner.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: September 13, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Edward L. Kaiser, Paul Buchholz, Khwaja M. Rahman
  • Publication number: 20160248286
    Abstract: An improved rotor assembly configured for magnets with differing lengths, and methods and systems for manufacturing the same. The rotor assembly may be created by selectively creating first and second tabs extending into apertures of lamination sheets. The first and second tabs may be selectively removed, depending on the different magnet lengths and the specific lamination sheet, according to one of a first finishing schedule and a second finishing schedule. The lamination sheets are stacked with any remaining first and second tabs, and other features, aligned.
    Type: Application
    Filed: November 4, 2015
    Publication date: August 25, 2016
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Edward L. Kaiser, Peter J. Savagian, Khwaja M. Rahman
  • Publication number: 20160248282
    Abstract: An interior permanent magnet machine includes a wound stator, and a rotor core defining a plurality of pole cavities. Each of the pole cavities includes a cross section, perpendicular to a central axis of rotation, that defines a cross sectional shape having a centerline. The cross sectional shape of each of the pole cavities includes a radially inner barrier portion, a radially outer barrier portion, and a central portion. The centerline of the cross sectional shape of each of the radially outer barrier portion and the radially inner barrier portion, of each pole cavity, is defined by a generally arcuate segment. The centerline of the cross sectional shape of the central portion, of each pole cavity, is defined by a linear segment. One of a plurality of rare earth magnets, having no heavy rare earth elements, is disposed within the central portion of one of the plurality of pole cavities.
    Type: Application
    Filed: February 24, 2015
    Publication date: August 25, 2016
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Sinisa Jurkovic, Khwaja M. Rahman
  • Patent number: 9379586
    Abstract: A stator assembly includes a plurality of stator slots defining a plurality of slot layers. The assembly includes a plurality of hairpins each having respective first and second legs positioned in respective ones of the slot layers. Each of the hairpins is one of a short-pitched coil, a long-pitched coil and a full-pitched coil. The short-pitched, long-pitched and full-pitched coils are configured to extend over a first, second and third number of the stator slots, respectively. The hairpins may be divided into first, second, third, fourth, fifth and sixth hairpin layers. One of the hairpin layers includes at least one short-pitched coil, and another of the hairpin layers includes at least one long-pitched coil. The first, third and fifth hairpin layers each may include at least two short-pitched coils while the second, fourth and sixth hairpin layers each may include at least two long-pitched coils.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: June 28, 2016
    Assignee: GM Global Technology Operations LLC
    Inventors: Khwaja M. Rahman, Sinisa Jurkovic, Peter J. Savagian
  • Publication number: 20160126789
    Abstract: A permanent magnet (PM) motor includes a stator defining an inner stator opening. The inner stator opening extends along a stator axis. The PM motor further includes a rotor disposed inside the stator. The stator includes a plurality of lamination segments stacked together along the stator axis. Each lamination segment includes an annular stator body and teeth extending from the annular stator body toward the stator axis. The teeth are spaced apart from one another so as to define a plurality of slots arranged annularly about the stator axis. The stator defines slot openings arranged annularly about the stator axis. At least one of the lamination segments is rotationally offset relative to another lamination segments so that at least one of the slot openings is circumferentially offset from another slot openings in the other lamination segment.
    Type: Application
    Filed: October 31, 2014
    Publication date: May 5, 2016
    Inventors: Mohammad Faizul Momen, Khwaja M. Rahman
  • Publication number: 20160056676
    Abstract: A partially segmented rotor assembly for an electric motor and a method for the same is provided. The partially segmented rotor assembly includes a first rotor segment and a plurality of second rotor segments. The first rotor segment has a plurality of first poles wound with a wire and defines a first circumferential gap between the wire of each adjacent pair of the first poles. Each second rotor segment has a second pole wound with the wire and is rigidly attached to the first rotor segment in a respective one of the first circumferential gaps to form a plurality of second circumferential gaps between the wire of each first pole and the wire of the adjacent second poles. The first and second rotor segments are configured to cooperate with one another to minimize the second circumferential gaps.
    Type: Application
    Filed: August 25, 2014
    Publication date: February 25, 2016
    Inventors: Terence G. Ward, Constantin C. Stancu, Khwaja M. Rahman, Srihari Gangaraj, Brooks S. Mann
  • Patent number: 9154019
    Abstract: A hub assembly for an electric machine includes a rotor hub and a machine rotor. Rotation of the machine rotor generates an electromagnetic (EM) field. The hub assembly includes a resolver rotor that encodes an angular position of the machine rotor as a set of resolver signals. An EM field barrier ring between the resolver rotor and the rotor hub adds a magnetic barrier between the machine rotor and the resolver rotor to reduce noise in the resolver signals. The resolver rotor may be bonded to the EM field barrier ring. The EM field barrier ring may have an L-shaped cross section, and may be press-fitted into a pocket of the rotor hub. A vehicle includes a transmission having an input member and an electric machine having a rotor shaft connected to the input member of the transmission. The electric machine includes the hub assembly noted above.
    Type: Grant
    Filed: June 12, 2012
    Date of Patent: October 6, 2015
    Assignee: GM Global Technology Operations LLC
    Inventors: Brian Gallert, Khwaja M. Rahman, Matthew D. Laba, Paul F. Turnbull, Brian Schulze