公开(公告)号：US20250119031A1

公开(公告)日：2025-04-10

申请号：US18483553

申请日：2023-10-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC.

Inventor： Yilun Luo ,  Khorshed Mohammed Alam ,  Muhammad A. Zahid ,  Mazharul Chowdhury ,  Peng Peng ,  Thomas W. Nehl ,  Junghoon Kim

IPC: H02K11/30 ,  H02K1/12 ,  H02K1/22

Abstract: An electric machine with reconfigurable rotor poles. The machine may include a stator including a plurality of stator windings configured for generating a rotating magnetic field (RMF) and a rotor configured for rotating within the stator according to a torque induced by the RMF. The rotor may include a plurality of rotor windings wrapped around a plurality of circumferentially spaced rotor protrusions. The electric machine may include a rotor power transfer circuit operable for reconfiguring electrical excitation of the rotor windings according to a plurality of excitation modes.

公开(公告)号：US20250119025A1

公开(公告)日：2025-04-10

申请号：US18482260

申请日：2023-10-06

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad A. Zahid ,  Alexander Forsyth ,  Khorshed Mohammed Alam ,  Mazharul Chowdhury

IPC: H02K9/22 ,  B60K1/00 ,  B60K1/04 ,  B60K11/02 ,  B60L50/60 ,  H02K9/20

Abstract: Presented are electric machines with winding-slot embedded heat pipes/vapor chambers and endcap-integrated heat sinks, methods for making/using such machines, and vehicles equipped with such machines. An electric machine, such as a traction motor or electric generator, includes an outer housing, a stator assembly mounted to the housing, and a rotor assembly rotatably mounted adjacent the stator assembly. The stator assembly includes an annular stator core with one or more electromagnetic stator windings mounted on or in the stator core. The rotor assembly includes a cylindrical rotor core and one or more electromagnetic rotor windings mounted in rotor slots of the rotor core. One or more heat pipes are mounted in the rotor slot(s), adjacent the rotor winding(s), and projecting axially from one or both axial ends of the rotor core. Each heat pipe extracts thermal energy from the rotor winding(s) and transfers the thermal energy out from the rotor core.

公开(公告)号：US20250119002A1

公开(公告)日：2025-04-10

申请号：US18483181

申请日：2023-10-09

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Mohammad F. Momen ,  Mazharul Chowdhury ,  Alexander Forsyth ,  Yilun Luo

IPC: H02K1/16 ,  B60K1/00 ,  H02K3/12 ,  H02K7/00 ,  H02K11/33 ,  H02K15/02

Abstract: Presented are electric machines with both bar and wire conductors, methods for making/using such machines, and vehicles equipped with such machines. An electric machine, such as a traction motor or electric generator, includes an outer housing, a stator fixedly mounted to the housing, and a rotor movably mounted to the housing and spaced across an airgap from the stator. Multiple magnets, such as permanent magnet blocks, are mounted on or in slots of the rotor (or the stator). A set of electromagnetic conductors extends through each radially elongated slot of the stator (or the rotor). Each conductor set includes a group of solid-wire or multistrand-wire conductors that is located adjacent the airgap. A group of hairpin or I-pin bar conductors is radially spaced from the airgap and located adjacent the wire conductors. The bar conductors have a cross-sectional area/shape that is distinct from a cross-sectional area/shape of the wire conductors.

公开(公告)号：US20250038595A1

公开(公告)日：2025-01-30

申请号：US18361289

申请日：2023-07-28

Applicant: GM Global Technology Operations LLC

Inventor： Mazharul Chowdhury ,  Le Chang ,  William Robert Jensen ,  Mohammad F. Momen ,  Alan Del Rio

IPC: H02K1/276 ,  H02K7/00

Abstract: An interior permanent magnet electric machine includes a stator and a rotor. The rotor features a rotor core with slots extending between its opposite ends. These slots contain a segmented magnet assembly, which includes magnet segments of different magnetic materials. The segmented magnet assembly may be divided radially, axially, circumferentially or combinations thereof and may include outer magnet segments made of the first magnetic material and inner magnet segments made of the second magnetic material. Additionally, the segmented magnet assembly includes magnetic poles that are aligned in radial, axial, or circumferential directions.

公开(公告)号：US12152657B2

公开(公告)日：2024-11-26

申请号：US18295318

申请日：2023-04-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Edward W Mellet ,  Peter Beller ,  Mazharul Chowdhury

IPC: F16H3/44

Abstract: Compact transmission systems and vehicles with such transmission systems are provided. An exemplary compact transmission includes a drive shaft defining a drive axis and configured to be powered by a drive unit; a planetary gearset having a ring gear member, a planet gear member, a sun gear member, and a planet carrier having a carrier shaft defining a planetary axis, wherein the planetary axis is distanced from the drive axis; an output shaft defining an output axis, wherein the output axis is distanced from the planetary axis and from the drive axis; an output gear connected to the output shaft; a drive pinion gear configured to transfer torque from the drive shaft to the planetary gearset; and an output pinion gear configured to transfer torque from the planetary gearset to the output shaft.

公开(公告)号：US20240380342A1

公开(公告)日：2024-11-14

申请号：US18313616

申请日：2023-05-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： William Robert Jensen ,  Mazharul Chowdhury ,  Suresh Gopalakrishnan ,  Lei Hao ,  Peng Peng

IPC: H02P6/10

Abstract: Techniques are provided for torque ripple mitigation. In one embodiment, the techniques involve determining a first torque ripple at a torque output of a target electrical machine, upon determining that the first torque ripple exceeds a threshold, reproducing the torque output based on a pair of gamma control sets, determining a second torque ripple at the reproduced torque output, upon determining that the second torque ripple falls below the threshold, generating qualified gamma controls based on the gamma control sets, and supplying the qualified gamma controls to the target electrical machine.

公开(公告)号：US20250132651A1

公开(公告)日：2025-04-24

申请号：US18490057

申请日：2023-10-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Peng Peng ,  Thomas W. Nehl ,  Derek F. Lahr ,  Alireza Fatemi ,  Lei Hao ,  Suresh Gopalakrishnan ,  Avoki M. Omekanda ,  Renato Amorim Torres ,  Mazharul Chowdhury

IPC: H02K19/12 ,  H02K3/28

Abstract: A magnet-free electric machine. The electric machine may include a stator including a first stator winding set and a second stator winding set and a rotor including a first rotor winding set and a second rotor winding set. The electric machine may include a power transfer circuit configured for controlling a polarity and/or a phase sequence of excitation currents used in exciting the first and second stator and rotor windings, and thereby, respectively generated stator and rotor poles.

公开(公告)号：US20250112577A1

公开(公告)日：2025-04-03

申请号：US18479414

申请日：2023-10-02

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Khorshed Mohammed Alam ,  Yilun Luo ,  Junghoon Kim ,  Chandra S. Namuduri ,  Muhammad A. Zahid ,  Mazharul Chowdhury ,  Lei Hao ,  Seyedrasoul Hosseini

IPC: H02P27/06 ,  B60L50/60 ,  B60L53/20 ,  H01R39/08 ,  H02J7/00 ,  H02K11/00 ,  H02K11/33 ,  H02K15/00 ,  H02M1/42

Abstract: Presented are separately excited motor (SEM) drive systems, methods for making/using such systems, and vehicles equipped with such systems. A motor drive system includes a rechargeable battery unit and a multilevel power factor correction (PFC) device interposed between and electrically connecting the battery unit and an electric power source. The battery unit and PFC device are electrically connected via a traction inverter module (TIM) device and a multilevel power transfer circuit (PTC) device. The TIM contains multiple pairs of TIM switches, and the PTC device contains multiple PTC switches. An SEM unit contains a rotor assembly, which includes a rotor core bearing a rotor winding, and a stator assembly, which includes a stator core bearing multiple stator windings electromagnetically paired with the rotor winding. Each stator winding is electrically connected to a respective pair of TIM switches, whereas the rotor winding is electrically connected to the PTC switches.

公开(公告)号：US20250112500A1

公开(公告)日：2025-04-03

申请号：US18480085

申请日：2023-10-03

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Muhammad A. Zahid ,  Khorshed Mohammed Alam ,  Mazharul Chowdhury ,  Junghoon Kim ,  Yilun Luo

IPC: H02J50/10 ,  B60L53/12 ,  B60L53/20 ,  H01F27/06 ,  H01F27/08 ,  H01F27/24 ,  H01F27/28

Abstract: A power transfer system may include a rotating magnetic core; a rotating high index core winding within the rotating magnetic core; a stationary high index core winding within the rotating high index core winding; and a stator referenced magnetic core within the stationary high index core winding. The power transfer system may include a rotor rectifier mounting plate, operatively attached to the rotating magnetic core, and/or a first and a second stationary high index core winding; and/or the stationary high index core winding and the stator referenced magnetic core do not rotate and/or the rotor rectifier mounting plate includes rectifiers to convert AC to DC; and/or the rotor rectifier mounting plate is further configured as a heat sink; and/or the rotor rectifier mounting plate is operatively attached to the rotating magnetic core via adhesive; and/or cooling fluid is allowed to pass through the power transfer system.

公开(公告)号：US20240421681A1

公开(公告)日：2024-12-19

申请号：US18336202

申请日：2023-06-16

Applicant: GM Global Technology Operations LLC

Inventor： Alireza Fatemi ,  Alan G. Holmes ,  Shawn H. Swales ,  Mazharul Chowdhury ,  Muhammad Hussain Alvi ,  Peng Peng ,  Thomas W. Nehl

IPC: H02K21/04 ,  B60L53/22

Abstract: A vehicle's electrified powertrain includes a battery pack linked to a traction power inverter module (TPIM) converting DC voltage from the battery pack into AC voltage. A rotary electric machine includes a stator energized by the TPIM's AC voltage, enclosing a rotor core capable of rotation. The rotor core contains slots holding conductive bars and permanent magnets, with conductive bars positioned closer to the rotor core's center. The conductive bars and permanent magnets are separated by gaps within each slot. An annular end ring assembly is present at one end of the rotor core, featuring terminal conductors connected to subsets of conductive bars and a secondary coil of a rotary transformer. When the stator is energized, the rotor shaft, connected to the rotor, rotates. The electric machine powers a transmission, which is coupled to the rotor shaft.