公开(公告)号：US20200381972A1

公开(公告)日：2020-12-03

申请号：US16429828

申请日：2019-06-03

Applicant: GM Global Technology Operations LLC

Inventor： Mohammad F. Momen ,  Khwaja M. Rahman

IPC: H02K3/42 ,  H02K1/16 ,  H02K7/00 ,  H02K11/00 ,  H02K11/33 ,  H02K21/14 ,  B60K1/04 ,  B60L50/60

Abstract: A rotary electric machine includes a rotor and a stator. The stator has windings and teeth extending radially from a stator core. Each tooth is separated from an adjacent tooth by a stator slot that opens to a radial stator-rotor airgap via a slot opening. The windings are positioned within each slot. Each stator tooth has a tooth tip with a surface profile configured to guide rotor flux away from areas of the windings proximate the respective slot opening. The tip surface profile may be a concave region, e.g., a dent/chamfer, and/or a convex region, e.g., a bump/bulge, and is formed in a distal end surface of the tip proximate the opening. The stator-rotor airgap is smaller at the convex region and larger at the concave region than elsewhere along the distal end surface. An electrical system includes the machine, a battery, and a power inverter module.

公开(公告)号：US20200044497A1

公开(公告)日：2020-02-06

申请号：US16055412

申请日：2018-08-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mohammad F. Momen ,  Khwaja M. Rahman

IPC: H02K1/16 ,  H02K21/14 ,  H02K3/12 ,  H02K3/34 ,  H02K29/03 ,  H02K7/00

Abstract: A rotating electric machine includes a stator and a rotor disposed within the stator. The stator defines a plurality of teeth and a plurality of semi-open slots. The plurality of semi-open slots further include a plurality of slot groups wherein each slot group further includes a plurality of slot subgroups. Each slot group includes at least a first subgroup of slots having a first slot opening width and being dedicated to a first phase, and a second subgroup of slots having a second slot opening width and being dedicated to a second phase, the second slot opening width being different from the first slot opening width.

公开(公告)号：US10340761B2

公开(公告)日：2019-07-02

申请号：US14669879

申请日：2015-03-26

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Paul F. Turnbull ,  Edward L. Kaiser ,  Matthew D. Laba ,  Khwaja M. Rahman ,  Rolf Blissenbach

IPC: H02K3/28 ,  H02K3/50

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.

公开(公告)号：US10116174B2

公开(公告)日：2018-10-30

申请号：US15145916

申请日：2016-05-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Constantin C. Stancu ,  Peter J. Savagian ,  Khwaja M. Rahman ,  Nitinkumar R. Patel ,  Robert T. Dawsey

IPC: H02K21/12 ,  H02K1/02 ,  H02K1/24 ,  H02K19/02

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.

公开(公告)号：US09520753B2

公开(公告)日：2016-12-13

申请号：US13949294

申请日：2013-07-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Khwaja M. Rahman ,  Edward L. Kaiser ,  Sinisa Jurkovic ,  Peter J. Savagian

IPC: H02K3/28 ,  H02K3/04

CPC classification number: H02K3/28 ,  H02K3/04

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.

Abstract translation: 定子组件包括限定多个槽层的多个定子槽。 组件包括多个发夹，每个发夹具有定位在多个槽层中的一个中的相应的第一腿部和位于多个狭缝层中的另一个中的相应的第二腿部。 每个发夹构造成允许电流从相应的第一支腿流到相应的第二支腿。 多个发夹被分成多个发夹层。 发夹形成多个绕组，例如第一，第二，第三和第四绕组。 每个绕组至少部分地包括来自多个发夹层中的至少两个的发夹。 多个时隙层可以包括六个时隙层。 多个发夹层可以包括六个发夹层。 因此，发夹层中的至少一个可以由两个绕组组“共享”。

公开(公告)号：US20160056676A1

公开(公告)日：2016-02-25

申请号：US14467345

申请日：2014-08-25

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Terence G. Ward ,  Constantin C. Stancu ,  Khwaja M. Rahman ,  Srihari Gangaraj ,  Brooks S. Mann

IPC: H02K1/28 ,  H02K1/24

CPC classification number: H02K1/28 ,  H02K1/24

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.

Abstract translation: 提供了一种用于电动机的部分分段转子组件及其方法。 部分分段的转子组件包括第一转子段和多个第二转子段。 第一转子段具有缠绕有线的多个第一极，并且限定每个相邻的第一极的线之间的第一周向间隙。 每个第二转子段具有与导线缠绕的第二极，并且在第一周向间隙的相应一个中刚性地附接到第一转子段，以在每个第一极的导线和第一极之间的线之间形成多个第二周向间隙 相邻的第二极。 第一和第二转子段被配置成彼此协作以使第二周向间隙最小化。

公开(公告)号：US11121595B2

公开(公告)日：2021-09-14

申请号：US16700443

申请日：2019-12-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Craig S. Ross ,  Khwaja M. Rahman ,  Goro Tamai ,  Shawn H. Swales

IPC: H02K1/27 ,  H02K1/28 ,  H02K15/03 ,  H02K1/24 ,  H02K7/116 ,  H02K16/02 ,  H02K21/02

Abstract: A permanent magnet electric machine (PM machine) for a vehicle or other system includes a rotor assembly, fixed permanent magnets, a stator, an actuator, and one or more repositionable/moveable flux-shunting elements. The flux-shunting element is repositioned to control flux at specific operating points of the PM machine. The rotor assembly has a rotor coaxially surrounding and coupled to a rotor shaft. The permanent magnets are mounted to or in the rotor, and the moveable flux-shunting element is positioned between the rotor shaft and a respective one of the permanent magnets. Inboard and outboard ends of each respective permanent magnet may be oriented toward the rotor shaft and stator, respectively. The actuator selectively positions the moveable flux-shunting element at one or more operating points of the PM machine to vary reluctance in a magnetic circuit formed by the stator and rotor assembly.

公开(公告)号：US20200153299A1

公开(公告)日：2020-05-14

申请号：US16744616

申请日：2020-01-16

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Shawn H. Swales ,  Khwaja M. Rahman ,  Craig S. Ross ,  Goro Tamai

IPC: H02K1/30 ,  H02K1/27 ,  H02K21/02

Abstract: A permanent magnet electric machine (PM machine) includes a rotor with rotatable magnets and a stator defining an air gap with the rotor. An actuator rotates the rotatable magnets at predetermined operating points through an angular distance sufficient for changing magnetic pole orientations of the rotatable magnets, and thus modifies magnetic flux linkage with stator windings across the air gap. Fixed magnets may be arranged around a circumference of the rotor. The actuator may be actively or passively driven. Flux-shunting elements are optionally disposed in the rotor to further modify the flux linkage. A gear set connected to torque transfer elements may be driven by the actuator to rotate the rotatable magnets. A vehicle includes drive wheels, a transmission, and the PM machine. A method controls magnetic flux linkage in the PM machine noted above.

公开(公告)号：US20160276885A1

公开(公告)日：2016-09-22

申请号：US14788946

申请日：2015-07-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Sinisa Jurkovic ,  Mohammad Faizul Momen ,  Khwaja M. Rahman

IPC: H02K1/27

CPC classification number: H02K1/2766 ,  H02K29/03 ,  H02K2201/06

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.

Abstract translation: 内置永磁电机包括具有中心轴和多个轴向段的转子。 轴向段包括在轴向方向上彼此相邻定位的第一轴向段和第二轴向段。 每个轴向间隔的段包括限定相应的角度构造的至少一个极，其特征在于相应的第一，第二和第三角度。 第一轴向段限定第一组角度构造，第二轴向段限定第二组角度构造。 转子被构造成具有轴向非对称构造，使得第一组角度构造不同于第二组角度构造。

公开(公告)号：US09130422B2

公开(公告)日：2015-09-08

申请号：US13789880

申请日：2013-03-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Khwaja M. Rahman ,  Sinisa Jurkovic

IPC: H02K1/27 ,  H02K21/12 ,  H02K1/02 ,  H02K21/14

CPC classification number: H02K1/274 ,  H02K1/02 ,  H02K1/2766 ,  H02K21/14

Abstract: A rotor core for an internal permanent magnet machine includes at least one ferrite pole and at least one rare earth pole, arranged radially about an axis in alternating relationship. The ferrite poles define a plurality of first pole cavities, and the rare earth poles define a plurality of second pole cavities. One of a plurality of ferrite magnets is disposed within each of the first pole cavities of the ferrite poles, and one of a plurality of rare earth magnets is disposed within each of the second pole cavities of the rare earth poles.

Abstract translation: 用于内部永磁体机器的转子芯包括至少一个铁氧体磁极和至少一个稀土极，以交替的关系围绕轴径向布置。 铁氧体磁极限定多个第一极腔，稀土极限定多个第二极腔。 多个铁氧体磁体中的一个设置在铁氧体磁极的每个第一极腔内，并且多个稀土磁体中的一个设置在稀土极的每个第二极腔内。