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公开(公告)号：US20240380279A1
公开(公告)日：2024-11-14
申请号：US18314927
申请日：2023-05-10
Applicant: GM Global Technology Operations LLC
Inventor： Xiaofeng Yang , Peng Peng , Farzad Samie
Abstract: An electric propulsion motor system includes a rotary electric propulsion motor that has a stator and a rotor. An air gap is present between the stator and rotor. A fluid circulation system provides pressurized liquid and gas, which is directed through fluid passages in the stator and/or rotor and into the air gap to establish a mixture of pressurized liquid and pressurized gas therein. The pressurized gas dilutes the mixture and pushes the pressurized liquid and pressurized gas against the stator and rotor, forcing it to exit the air gap at the opposite ends of the motor leaving the air gap free of accumulated liquid.
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公开(公告)号：US20240235336A1
公开(公告)日：2024-07-11
申请号：US18152885
申请日：2023-01-11
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Farzad Samie , Peng Peng , Alireza Fatemi
IPC: H02K11/40
CPC classification number: H02K11/40
Abstract: An alternating current motor system includes a motor frame, a rotor including a rotor shaft, a stator including multi-phase AC stator windings, a power inverter producing a multi-phase AC voltage coupled to the multi-phase AC stator windings and at least one ohmic connection between the rotor shaft and the motor frame including a conductive fluid.
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公开(公告)号：US11646620B2
公开(公告)日：2023-05-09
申请号：US17230501
申请日：2021-04-14
Applicant: GM Global Technology Operations LLC
Inventor： Derek F. Lahr , Farzad Samie , Edward L. Kaiser
CPC classification number: H02K1/28 , H02K1/276 , H02K15/024 , H02K15/03 , Y10T29/53143
Abstract: A rotor core for an electric machine of an automobile includes a core stack including a plurality of lamination plates, each lamination plate including a plurality of apertures formed therein, the apertures of each of the lamination plates axially aligned to define a plurality of magnet slots extending axially through the core stack, a plurality of magnets stacked axially within each of the plurality of magnet slots along a length of the core stack, at least one of the plurality of magnet slots including a cavity extending axially along the length of the core stack, and a wedge inserted within the cavity adapted to apply a lateral force onto the plurality of magnets within the at least one magnet slot to secure the plurality of magnets within the at least one magnet slot.
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公开(公告)号：US11167749B2
公开(公告)日：2021-11-09
申请号：US16747281
申请日：2020-01-20
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chunhao J. Lee , Neeraj S. Shidore , Norman K. Bucknor , Dongxu Li , Farzad Samie
Abstract: A hybrid electric powertrain for a vehicle includes an engine, electric machine, torque converter having a pump, turbine, and torque converter clutch (“TCC”) configured, when applied, to lock the pump to the turbine, a one-way engine disconnect clutch connected to the turbine, a transmission, and a controller. A transmission input shaft directly couples to the electric machine, and is selectively coupled to the engine via the disconnect clutch. An output shaft is connectable to road wheels of the vehicle. The controller, in response to an engine-off request, determines turbine and pump speeds of the turbine and pump, respectively, registers that the engine is in an engine-off state when the pump speed is less than the turbine speed, and executes an electric vehicle (“EV”) mode shift using machine torque from the electric machine when the pump speed is zero during the engine-off state.
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公开(公告)号：US11133724B2
公开(公告)日：2021-09-28
申请号：US16580427
申请日：2019-09-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Derek F. Lahr , Alireza Fatemi , Farzad Samie
Abstract: A rotor for an electric machine includes a rotor core having at least one internal cavity. A pair of features are defined by the rotor core and extend into the cavity. A structural element is compressed between the features so that a preload may be established between the features and the structural element.
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Patent Agency Ranking
公开(公告)号：US11009124B2
公开(公告)日：2021-05-18
申请号：US16518119
申请日：2019-07-22
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Dongxu Li , Chunhao J. Lee , Farzad Samie , Derek F. Lahr
Abstract: Presented are torque converters with integrated engine disconnect devices, methods for making/using such torque converters, and electric-drive vehicles equipped with such torque converters. A torque converter (TC) assembly includes a TC housing that drivingly connects to an engine output member. A TC output member projects from the TC housing and drivingly connects to a transmission input member. A turbine with a bladed turbine shell is mounted on the TC output member and rotatable within the TC's internal fluid chamber. An impeller with a bladed impeller shell is juxtaposed with the turbine and rotatable within the fluid chamber. An engine disconnect device, which is disposed within the fluid chamber between the impeller shell and TC housing, drivingly couples the impeller to and, when desired, drivingly decouples the impeller from the TC housing and engine output member to thereby transfer torque and prevent torque transfer, respectively, between the engine and transmission.
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公开(公告)号：US20210143693A1
公开(公告)日：2021-05-13
申请号：US16678486
申请日：2019-11-08
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Thomas W. Nehl , Farzad Samie , Alireza Fatemi , Derek F. Lahr , Tito R. Huffman
Abstract: A rotary electric machine includes a rotor assembly, stator, stator windings, and a coolant manifold. The rotor assembly includes a rotor and a rotor shaft. The stator is spaced apart from the rotor by a stator-rotor airgap and has stator teeth defining enclosed stator slots. Distal ends of adjacent stator teeth are joined together or integrally formed such that the enclosed stator slots are not contiguous with the airgap. The stator windings constructed from hairpin or bar-type conductors extend axially through the stator within the enclosed stator slots. The coolant manifold is in fluid communication with a coolant supply and configured to seal against an axial end surface of the stator to enclose a portion of the stator windings. The manifold receives and directs coolant from the coolant supply into the enclosed stator slots through the axial end surface to cool the stator via forced convection.
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公开(公告)号：US20210135533A1
公开(公告)日：2021-05-06
申请号：US16671732
申请日：2019-11-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Farzad Samie , Alireza Fatemi , Derek F. Lahr , Erik B. Golm , Xiaofeng Yang
Abstract: A rotary electric machine for use with coolant includes a stator and rotor assembly. The rotor assembly includes a rotor, rotor shaft, and first and second end rings. The rotor has inner and outer diameter surfaces and an embedded set of rotor magnets proximate the outer diameter surface. The shaft is connected to the rotor and defines a main coolant passage along an axis of rotation. Radial shaft coolant passages are in fluid communication with the main coolant passage. The end rings are positioned at opposing distal ends of the rotor. The shaft coolant passages direct the coolant into the rotor and/or the end rings such that the coolant flows axially through rotor cavities of the rotor and cools the rotor magnets via forced convection.
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公开(公告)号：US20210091630A1
公开(公告)日：2021-03-25
申请号：US16580427
申请日：2019-09-24
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Derek F. Lahr , Alireza Fatemi , Farzad Samie
Abstract: A rotor for an electric machine includes a rotor core having at least one internal cavity. A pair of features are defined by the rotor core and extend into the cavity. A structural element is compressed between the features so that a preload may be established between the features and the structural element.
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公开(公告)号：US20210054885A1
公开(公告)日：2021-02-25
申请号：US17090234
申请日：2020-11-05
Applicant: GM Global Technology Operations LLC
Inventor： Derek F. Lahr , Chunhao J. Lee , Farzad Samie , Dongxu Li , Dmitriy Bruder
Abstract: Presented are clutch-type engine disconnect devices, methods for making/using such disconnect devices, and motor vehicles equipped with such disconnect devices. An engine disconnect device includes a notch plate, which has multiple notches and attaches to a torque converter, and a pocket plate, which has multiple pockets and attaches to an engine's crankshaft. A pawl is movably mounted within each notch; these pawls selectively engage the notches with the pockets. A notch plate insert is nested within each notch, supporting thereon one of the pawls. A selector plate interposed between the pocket and notch plates moves from a first position, to shift the pawls out of engagement with the pockets, and a second position, to move the notch plate inserts within the notches and allow the pawls to engage the notches with the pockets to thereby lock the notch plate to the pocket plate to rotate in unison with each other.
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