公开(公告)号：US20230402870A1

公开(公告)日：2023-12-14

申请号：US17839691

申请日：2022-06-14

Applicant: GM Global Technology Operations LLC

Inventor： Mohamed Kamel ,  Muhammad Hussain Alvi ,  Alireza Fatemi ,  Chandra S. Namuduri ,  Rashmi Prasad

IPC: H02J7/14 ,  H02J7/00 ,  H02M1/00 ,  H02P25/022

CPC classification number: H02J7/1423 ,  H02J7/0063 ,  H02M1/0043 ,  H02P25/022

Abstract: A method and apparatus for electrical energy transfer between a pair of series connected batteries coupled between positive and negative DC rails of a power inverter operatively connected to a plurality of stator phase windings of a stator winding of a motor may include coupling a midpoint of the pair of series connected batteries to the stator winding of the motor, and controlling the power inverter to operate the power inverter and the stator winding as a switched-mode power converter to charge at least one of the stator phase windings from one of the pair of series connected batteries and to discharge the at least one of the stator phase windings to the other of the pair of series connected batteries.

公开(公告)号：US11757321B2

公开(公告)日：2023-09-12

申请号：US17405480

申请日：2021-08-18

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Anthony M. Coppola ,  Farzad Samie ,  Thomas W. Nehl

IPC: H02K3/24 ,  H02K3/28 ,  H02K3/30 ,  H02K1/16 ,  H02K3/12 ,  H02K1/20 ,  H02K3/34

CPC classification number: H02K3/24 ,  H02K1/165 ,  H02K1/20 ,  H02K3/12 ,  H02K3/28 ,  H02K3/30 ,  H02K3/345

Abstract: A stator assembly for an electric machine includes stator teeth connected to a stator yoke to form a stator core. Adjacent teeth define a stator slot. Stator windings are disposed within the slot. A molding material fills the slot around the windings, providing a desired thermoelectrical performance level at different slot regions, including electrical insulation, thermal conductivity, and/or electrostatic shielding levels. A method insulates the stator assembly by inserting a molding tool(s) into the slot to define a void volume, filling the void volume with the dielectric molding material, and curing the dielectric molding material to form a slot liner layer adjacent to the tooth walls. A slot opening between adjacent teeth is filled with an electrically-conductive resin to form an electrostatic shielding layer. An electrical system includes an AC voltage bus connected to a power inverter module and to the electric machine having the above-described stator assembly.

公开(公告)号：US11722043B2

公开(公告)日：2023-08-08

申请号：US17038757

申请日：2020-09-30

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Shawn H. Swales ,  Mohammad F. Momen ,  Derek F. Lahr

IPC: H02K21/04 ,  H02K1/276 ,  H02K21/14 ,  H02K1/2706

CPC classification number: H02K21/042 ,  H02K1/2706 ,  H02K1/2766 ,  H02K21/046 ,  H02K21/14

Abstract: A synchronous machine having a hybrid rotor excitation. The synchronous machine includes a rotor having a plurality of permanent magnets and electromagnets embedded within a rotor body. The permanent magnets produces a constant magnet field having a magnetic axis along a direct axis (D-axis). The electromagnets produces a variable magnetic field along a magnetic axis offset from the D-axis, preferable substantially orthogonal to the D-axis. The plurality of permanent magnets are separated from the electromagnets by a rotor air-gap. The plurality of permanent magnets includes inner pairs and outer pairs of permanent magnets nested in a V-shaped configuration. In another embodiment, the outer pairs of permanent magnets are replaced with outer radius electromagnets.

公开(公告)号：US11699967B2

公开(公告)日：2023-07-11

申请号：US17195727

申请日：2021-03-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad H. Alvi ,  Alireza Fatemi ,  Suresh Gopalakrishnan ,  Chandra S. Namuduri

IPC: H02P21/10 ,  H02P21/16 ,  H02P21/18 ,  H02P27/12 ,  H02P21/22 ,  B60K1/04

CPC classification number: H02P21/10 ,  H02P21/16 ,  H02P21/18 ,  H02P21/22 ,  H02P27/12 ,  B60K1/04

Abstract: An electric machine disposed within a housing includes a stator, a rotor, and one or more point field detectors. The stator receives current from an inverter. The rotor is connected to and rotating a shaft based on a magnetic field generated by the stator. The one or more point field detectors are configured to detect leakage flux within the housing. The stator, the rotor and the one or more point field detectors are disposed within the housing.

公开(公告)号：US20230216379A1

公开(公告)日：2023-07-06

申请号：US17647049

申请日：2022-01-05

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Chih-hung Yen ,  SeungHwan Keum ,  Farzad Samie ,  Thomas W. Nehl ,  Taeyoung Han ,  Ronald O. Grover, JR.

IPC: H02K9/22 ,  H02K1/276 ,  H02K9/20

CPC classification number: H02K9/225 ,  H02K1/276 ,  H02K9/20

Abstract: A rotor for an electric machine includes a heat pipe cooling system. A rotor core has a number of cavities internal to the rotor core. The cavities are surrounded by a wall defined by the rotor core. A magnetic element disposed in the at least one cavity leaving a void in the at least one cavity between the magnetic element and the wall. A heat pipe evaporator is disposed in the void and conforms to the available space, contacting the magnetic element and the wall to remove heat from the rotor core.

公开(公告)号：US11689074B2

公开(公告)日：2023-06-27

申请号：US17084181

申请日：2020-10-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Anthony M. Coppola ,  Kestutis A. Sonta ,  Alireza Fatemi ,  Gayatri V. Dadheech ,  Yew Sum Leong ,  Xiaosong Huang

IPC: H02K1/28 ,  B60K1/00 ,  H02K1/27 ,  H02K1/32 ,  H02K15/03 ,  H02K21/14 ,  H02K1/276

CPC classification number: H02K1/28 ,  B60K1/00 ,  H02K1/276 ,  H02K1/32 ,  H02K15/03 ,  H02K21/14 ,  B60K2001/006

Abstract: An adhesive-reinforced rotor for a rotary electric machine includes rotor lamination layers (“rotor lams”) having axial inner surfaces collectively defining rotor openings through the rotor lams. The rotor also includes reinforcement blocks disposed within a respective one of the rotor openings. A polymer primer/adhesive layer of the rotor having a bond line thickness of less than 1 mm is disposed between the one or more reinforcement blocks and the axial inner surfaces of the rotor lams. The reinforcement blocks and the primer/adhesive layer each have a tensile strength of at least 50 MPa. A modulus of elasticity of the reinforcement blocks is at least three times greater than that of the materials of the polymer primer/adhesive layer. A method of constructing an adhesive-reinforced rotor is also described herein.

公开(公告)号：US11575299B2

公开(公告)日：2023-02-07

申请号：US16736203

申请日：2020-01-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Derek F. Lahr ,  Alireza Fatemi ,  Anthony M. Coppola ,  Sean R. Wagner

IPC: H02K15/03 ,  H02K1/27 ,  H02K15/12 ,  H02K21/14 ,  H02K7/00 ,  H02K1/276 ,  B60K6/26

Abstract: A method for constructing a rotor assembly for use with a rotary electric machine includes forming annular rotor laminations from metal blanks. Each lamination has a radial axis and an outer diameter surface. Multiple magnet web regions are defined in proximity to the outer diameter surface. Each web regions includes asymmetrical openings defined by a radially-extending strut and arcuate peripheral bridges. The method includes coaxially stacking the laminations into a rotor stack, including positioning every other lamination a predetermined angular distance with to unmask the bridges and/or struts and mask remaining surface area of the laminations. The rotor stack is subjected to a heat-treating process to harden only the unmasked bridges and/or struts. The method includes connecting a rotor shaft to the stack to construct the rotor assembly, with the web regions corresponding to a respective rotor magnetic pole.

公开(公告)号：US11575283B2

公开(公告)日：2023-02-07

申请号：US16589583

申请日：2019-10-01

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Alireza Fatemi ,  Thomas W. Nehl

IPC: H02K1/16 ,  H02K1/02 ,  H02K1/27 ,  H02K11/33 ,  H02K15/02 ,  H02K17/12 ,  H02K21/14 ,  H02K1/276

Abstract: A modular stator-inverter assembly for an electric machine includes a stator and a traction power inverter module (“TPIM”). The stator includes a stator core having a center axis, an inner diameter (“ID”), an outer diameter (“OD”), and electrical conductors forming stator windings. Stator teeth extending radially toward the center axis from the ID collectively define stator slots occupied by the stator windings. Each adjacent pair of stator teeth defines a respective stator slot. The TPIM delivers a polyphase voltage to the stator windings to generate a predetermined number of stator poles, such that the stator has either two, three, or four of the stator slots per electric phase per stator pole. The stator defines a center cavity and is configured to receive a selected rotor from an inventory of preconfigured machine rotors. The inventory includes multiple synchronous reluctance machine rotors and an induction machine rotor.

公开(公告)号：US11489472B2

公开(公告)日：2022-11-01

申请号：US17191050

申请日：2021-03-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Suresh Gopalakrishnan ,  Chandra S. Namuduri ,  Lei Hao ,  Muhammad H. Alvi ,  Alireza Fatemi

IPC: H02P21/00 ,  H02P21/22 ,  H02M7/5387 ,  H02P27/08

Abstract: A motor control system includes: a d-q target module configured to, based on a target torque of an electric motor, determine a first target d-axis current and a first target q-axis current; an offset module configured to, based on a capacitor current through capacitors connected across phases of the electric motor, determine a d-axis current offset and a q-axis current offset; an adder module configured to determine a second target d-axis current based on a sum of the first target d-axis current and the d-axis current offset and to determine a second target q-axis current based on a sum of the first target q-axis current and the q-axis current offset; and a driver module configured to, based on the second target d-axis current and the second target q-axis current, switch switches of a current source inverter (CSI) module configured to apply power to the phases of the electric motor.

公开(公告)号：US20220212534A1

公开(公告)日：2022-07-07

申请号：US17141597

申请日：2021-01-05

Applicant: GM Global Technology Operations LLC

Inventor： Farzad Samie ,  Madhusudan Raghavan ,  Jian Yao ,  Alireza Fatemi

IPC: B60K6/442 ,  F16H57/02 ,  F16H45/02 ,  B60K6/383 ,  B60K6/365 ,  F16H57/04 ,  H02K7/00 ,  H02K7/10 ,  H02K7/116

Abstract: A hybrid powertrain for an automobile includes a transmission adapted to provide power to wheels of the automobile, an engine adapted to provide power to an input shaft of the transmission, and an electric motor-generator unit adapted to provide power to the input shaft of the transmission, wherein the electric motor-generator is positioned within the transmission, coaxial with the transmission input shaft, the electric motor-generator being supported by and enclosed within a pump support of the transmission.