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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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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.
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23.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.
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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.
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