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公开(公告)号：US12278550B2
公开(公告)日：2025-04-15
申请号：US17690071
申请日：2022-03-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Alireza Fatemi , Chih-Hung Yen , Farzad Samie , SeungHwan Keum , Thomas W. Nehl , Xiaofeng Yang
Abstract: A motor stator includes a stator core having a plurality of stator teeth on an inner diameter thereof and defining a respective plurality of slots between the plurality of stator teeth. A plurality of windings are disposed in the slots. A heat pipe network includes a plurality of evaporator portions including a hollow structure disposed in at least a portion of the plurality of slots and including an interior having a wick extending along the interior of the hollow structure. A condenser portion has an interior portion in communication with the plurality of evaporator portions and is located at an end of the stator core. The wick of each of the plurality of evaporator portions extend into the condenser portion.
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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
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.
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公开(公告)号：US11901844B1
公开(公告)日：2024-02-13
申请号：US17895366
申请日：2022-08-25
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. Namuduri , Suresh Gopalakrishnan , Norman K. Bucknor , Alireza Fatemi , Thomas W. Nehl
CPC classification number: H02P23/02 , B60L15/2045 , H02P23/14 , B60L2240/12 , B60L2240/423
Abstract: A method of controlling an electric motor of a vehicle includes monitoring torque command signals from a vehicle system to the electric motor, each torque command signal configured to cause the electric motor to output a commanded torque, and monitoring a speed of the vehicle and an output torque of the electric motor, the output torque responsive to a drive signal generated based on the torque command signals. The method also includes, based on the output torque and the vehicle speed indicating a low motor efficiency condition, modulating the drive signal between a first torque value and a second torque value that is less than the first torque value, the first torque value greater than the commanded torque and selected to increase an efficiency of the electric motor.
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公开(公告)号：US20240017582A1
公开(公告)日：2024-01-18
申请号：US17863514
申请日：2022-07-13
Applicant: GM Global Technology Operations LLC
Inventor： Alireza Fatemi , Thomas W. Nehl , Chandra S. Namuduri , Brian K. Saylor , Nilesh D. Mankame , Anthony Michael Coppola
CPC classification number: B60G17/06 , B60G13/16 , B60G2202/25 , B60G2204/62 , B60G2206/41 , B60G2600/22 , B60G2800/162
Abstract: A vehicle, suspension system and method of dampening a force on the suspension system is disclosed. The suspension system includes a damper having a first damping element and a second damping element configured to rotate relative to each other in response to a force received at the suspension system. The second damping element induces an eddy current in the first damping element during relative rotation. A feature of one at least one of the first damping element and the second damping element provides a first electrical resistance to the eddy current during relative rotation in a first direction and a second electrical resistance to the eddy current during relative rotation in a second direction. The first electrical resistance generates a first damping force and the second electrical resistance generates a second damping force.
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25.发明授权公开(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
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.
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Patent Agency Ranking
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.
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.
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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
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.
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公开(公告)号：US11444474B1
公开(公告)日：2022-09-13
申请号：US17194828
申请日：2021-03-08
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Benjamin Christian , Thomas W. Nehl , Rashmi Prasad
Abstract: A mobile power source apparatus includes a mobile unit having a platform structure, a frame connected to the platform structure and multiple wheels rotatably connected to the platform structure to promote moving the mobile unit. An electronics power module is connected to a DC power source defining a high voltage DC battery. The electronics power module converts DC energy of the DC battery to at least one of an alternating current (AC) power and a direct current (DC) power. A wireless communication device promotes wireless communication of a battery state-of-charge (SOC) of the high voltage DC battery. A liquid cooling thermal system provides positive cooling of the electronics power module.
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公开(公告)号：US11323001B2
公开(公告)日：2022-05-03
申请号：US16460138
申请日：2019-07-02
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Thomas W. Nehl , Alireza Fatemi
IPC: H01B5/08 , H02K3/14 , H02K1/16 , H02K1/276 , H02K3/02 , B60K1/00 , H02K3/34 , H02K15/03 , H02K15/06 , H02K15/10 , H02K7/00
Abstract: Presented are segmented hairpin bar conductors for electric machines, methods for making/using such segmented bar conductors, electromagnetic motors using such segmented bar conductors, and vehicles equipped with an induction motor generator unit using segmented hairpin bar conductors. An electric machine includes a stator that defines multiple circumferentially spaced, radially elongated stator slots. A rotor is located adjacent and movable with respect to the stator. One or more permanent magnets are mounted to the rotor, and one or more U-shaped hairpin windings are mounted to the stator in juxtaposed spaced relation to the magnet(s). Each hairpin winding is formed from an array of collimated, electrically conductive wires that are bundled together into a unitary bar conductor. The segmented hairpin winding has a pair of hairpin legs, each of which adjoins and projects from a respective end of a hairpin crown. Each hairpin leg inserts into a respective one the stator slots.
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公开(公告)号：US10655583B2
公开(公告)日：2020-05-19
申请号：US15127017
申请日：2015-03-19
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Avoki M. Omekanda , Chandra S. Namuduri , Suresh Gopalakrishnan , Thomas W. Nehl
Abstract: A method for operating an electromagnetic actuator includes an actuation event utilizing a current waveform for the actuator characterized by an initial peak pull-in current in a first direction of current flow when the actuator is commanded to an actuated position; and a reversed peak current in a second opposite direction of current flow applied after the actuator is commanded to a rest position. The reversed peak current has a magnitude that is greater than the magnitude of the initial peak pull-in current.
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