-
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.
-
公开(公告)号：US20250010761A1
公开(公告)日：2025-01-09
申请号：US18347874
申请日：2023-07-06
Applicant: GM Global Technology Operations LLC
Inventor： Muhammad Hussain Alvi , Chandra S. Namuduri , Suresh Gopalakrishnan , Junghoon Kim , Yilun Luo
Abstract: A multi-level inverter control system includes a power storage system having a high voltage terminal, a low voltage terminal, and an intermediate voltage terminal. The intermediate voltage terminal is at a voltage between the high voltage terminal and the low voltage terminal. A multi-level inverter includes a plurality of switches, a high voltage input connected to the high voltage terminal, a low voltage input connected to the low voltage terminal, and an intermediate voltage input connected to the intermediate voltage terminal. A controller is controllably coupled to the multi-level inverter. The controller includes at least a processor and a memory. The memory stores instructions configured to cause the controller to operate the multi-level inverter in a three-level inverter mode, a full power two-level inverter mode, a first partial power two-level inverter mode and a second partial power two-level inverter mode.
-
13.发明公开公开(公告)号：US20240363288A1
公开(公告)日：2024-10-31
申请号：US18308201
申请日：2023-04-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Junghoon Kim , Muhammad Hussain Alvi , Rashmi Prasad , Chandra S. Namuduri , Yilun Luo
CPC classification number: H01G4/30 , B60L50/60 , H01G4/228 , B60L2210/10 , B60L2210/40
Abstract: Aspects of the disclosure include a symmetric direct current (DC) link capacitor having a low parasitic equivalent series L-inductance (ESL). An exemplary capacitor can include one or more positive-dielectric-negative (PDN) stacks having a positive layer, a negative layer, and a dielectric layer between the positive layer and the negative layer. A first contact layer is electrically coupled to the positive layer on a sidewall of the one or more PDN stacks and a second contact layer is electrically coupled to the negative layer on the sidewall of the one or more PDN stacks. A positive terminal is electrically coupled to the first contact layer and a negative terminal is electrically coupled to the second contact layer.
-
公开(公告)号：US20240113711A1
公开(公告)日：2024-04-04
申请号：US17957116
申请日：2022-09-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain Alvi , Khorshed Mohammed Alam , Yilun Luo , Chandra S. Namuduri , Suresh Gopalakrishnan , Junghoon Kim , Mohamed Kamel
IPC: H03K17/687 , H03K17/04 , H03K17/16
CPC classification number: H03K17/6877 , H03K17/0406 , H03K17/168
Abstract: A system includes an electronic device including a circuit having a semiconductor switch, and a switching control system operably connected to the semiconductor switch. The switching control system is configured to control a switching speed of the semiconductor switch based on a received voltage by altering at least one of a gate resistance and a gate capacitance of the semiconductor switch.
-
公开(公告)号：US20240022161A1
公开(公告)日：2024-01-18
申请号：US17865482
申请日：2022-07-15
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Hong Nguyen , Michael Z. Pieszala , Yilun Luo , Khorshed Mohammed Alam , Sanjeev M. Naik , Benjamin S. Ngu
IPC: H02M1/08 , H02M7/5395 , H03K17/16
CPC classification number: H02M1/08 , H02M7/5395 , H03K17/16
Abstract: A variable current gate driver for a transistor includes a first current control device having a first controllable output current. The first current control device is electrically connected between a first bus and an activator of the transistor, and a second current control device having a second controllable output current. The second current control device is electrically connected between the activator of the transistor and a second bus. A controller is operatively connected to the first and second current control devices to control the first and second controllable output currents to control the first and second current control devices to control activation of the transistor via the activator. The controller is operative to control the first and second current control devices to control a slew rate of the transistor.
-
Patent Agency Ranking
公开(公告)号：US20250150012A1
公开(公告)日：2025-05-08
申请号：US18501261
申请日：2023-11-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yilun Luo , Junghoon Kim , Khorshed Mohammed Alam , Chandra S. Namuduri , Rashmi Prasad
Abstract: A multi-phase power inverter for an electric propulsion system includes a plurality of H-type multilevel power converters arranged between a high-voltage DC power supply and an electric machine. Each of the plurality of H-type multilevel power converters is a solid-state integrated circuit (IC) that includes a positive DC power bus, a negative DC power bus, a neutral bus, and a plurality of semiconductor switches disposed in a stacked arrangement. The plurality of semiconductor switches is interconnected via the positive DC power bus, the negative DC power bus, and the neutral bus.
-
公开(公告)号：US20250140704A1
公开(公告)日：2025-05-01
申请号：US18493947
申请日：2023-10-25
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Junghoon Kim , Rashmi Prasad , Yilun Luo
IPC: H01L23/538 , H01L23/00 , H01L25/07
Abstract: A power module and a multi-level inverter package is disclosed. At least four conductive traces are disposed on a substrate. Each conductive trace includes an insulation board, a gate bus disposed on the insulation board, a kelvin bus disposed on the insulation board, and a semiconductor die operating as a transistor. The semiconductor die including a drain, a gate, and a source. The drain is coupled to the conductive trace. The source is coupled to the kelvin bus and to an electrical connection off of the conductive trace. The gate is coupled to the gate bus.
-
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.
-
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
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：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.
-
-
-
-
-
-
-
-
-
Search Results
43
records
(took 0.018 seconds)
