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公开(公告)号：US20250119033A1
公开(公告)日：2025-04-10
申请号：US18481708
申请日：2023-10-05
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Mazharul Chowdhury , Mohammad F. Momen , Khorshed Mohammed Alam , Alexander Forsyth , Yilun Luo
Abstract: A propulsion system for a vehicle includes an electric motor configured to generate torque to propel the vehicle. The electric motor has a stator assembly with a plurality of stator slots defining slot layers along a respective slot axis. A first plurality of conductors is at least partially positioned in the plurality of stator slots and forming a first winding set. A second plurality of conductors is at least partially positioned in the plurality of stator slots and forms a second winding set. A first inverter is adapted to drive the electric motor, the first winding set being coupled to the first inverter. A second inverter is adapted to drive the electric motor, the second winding set being coupled to the second inverter. The system includes a controller adapted to control operation of the first and second inverters based in part on a motor speed of the electric motor.
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Patent Agency Ranking
2.发明申请公开(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
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.
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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
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.
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4.发明申请公开(公告)号：US20250141320A1
公开(公告)日：2025-05-01
申请号：US18494085
申请日：2023-10-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad A. Zahid , Alexander Forsyth , Khorshed Mohammed Alam , Mazharul Chowdhury , Yilun Luo
Abstract: Presented are electric machines with rotor shaft-mounted heat pipes/vapor chambers thermally coupled to endcap-integrated heat sinks, methods for making/using such machines, and vehicles equipped with such machines. An electric machine 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 one or more stator windings mounted to an annular stator core. The rotor assembly includes one or more electromagnetic rotor windings mounted to a cylindrical rotor core. A rotor power transfer circuit (PTC) is electrically connected to the rotor assembly to electrify the rotor winding(s). A rotor shaft is attached to the rotor core to rotate in unison therewith. One or more heat pipes are mounted on the rotor shaft's outer surface and project axially between the rotor PTC and rotor core. Each heat pipe passively extracts and transfers thermal energy from the rotor PTC.
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公开(公告)号：US20250119034A1
公开(公告)日：2025-04-10
申请号：US18482224
申请日：2023-10-06
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Mazharul Chowdhury , Muhammad A. Zahid , Alexander Forsyth , Khorshed Mohammed Alam , Yilun Luo , Junghoon Kim
Abstract: A rotor power transfer circuit for an electric machine. The rotor power transfer circuit may include a multiple leaf direct current (DC)-to-DC (DC-DC) converter having a plurality of branches connected in parallel to a source of DC power. The branches may include a plurality of switches operable for selectively controlling DC power transfer therethrough according to a plurality of rotor winding excitations modes. The rotor power transfer circuit may include an electrical interface configured for electrically connecting each branch with one of a one or more rotor windings wrapped around a plurality of circumferentially spaced rotor protrusions of the electric machine.
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公开(公告)号：US20250119005A1
公开(公告)日：2025-04-10
申请号：US18483577
申请日：2023-10-10
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Mazharul Chowdhury , Muhammad A. Zahid , Alexander Forsyth , Khorshed Mohammed Alam , Yilun Luo , Junghoon Kim
Abstract: An electric machine including a stator having a plurality of stator windings configured for generating a magnetic field and a rotor configured for rotating within the stator according to a torque induced by the magnetic field. The rotor includes a plurality of electrically independent rotor winding sets wrapped around each of a plurality of circumferentially spaced rotor protrusions. The electric machine further includes a power transfer circuit operable for independently controlling electrical excitation of the rotor winding sets. The electric machine further includes a cooling system for dissipating heat way from the rotor winding sets.
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