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公开(公告)号：US20240266924A1
公开(公告)日：2024-08-08
申请号：US18164572
申请日：2023-02-04
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yilun Luo , Chandra S. Namuduri , Suresh Gopalakrishnan , Muhammad H. Alvi , Azadeh Narimissa , William T. Ivan , Saranraj Karuppuswami
Abstract: A choke device for an electric machine system is provided. The choke device includes a common-mode choke including a magnetic core configured in cross-section as a geometric shape including a hollow center. The choke device further includes a plurality of electric transmission lines configured for transmitting electrical energy in alternating current, wherein the plurality of electric transmission lines is routed through the hollow center. The geometric shape includes a number of sides based upon a number of the electric transmission lines present and is configured for minimizing or reducing an overall flux length of the magnetic core.
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公开(公告)号：US11870433B2
公开(公告)日：2024-01-09
申请号：US17736165
申请日：2022-05-04
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi Prasad , Chandra S. Namuduri , Muhammad H. Alvi , Ronald O. Grover, Jr.
IPC: H01L21/48 , H01L23/00 , H01L23/057 , H01L25/07 , H03K17/687 , H01L23/053 , H01L23/373 , H01L23/367 , H03K17/041
CPC classification number: H03K17/687 , H01L23/053 , H01L23/367 , H01L23/3735 , H03K17/04106
Abstract: An electronic solid-state switch assembly includes a base plate and a heat exchanger; an electrically insulating layer and a direct bonded substrate affixed to the base plate; a first terminal and a second terminal; a plurality of power transistors; a plurality of gate drivers; a communication interface, a current sensor, and a snubber circuit; and a controller. The plurality of gate drivers are operatively coupled to the plurality of power transistors. The plurality of power transistors are arranged in parallel on the direct bonded substrate between the first terminal and the second terminal. The plurality of power transistors are electrically connected to the first terminal and to the second terminal. The controller is in communication with the plurality of gate drivers, the current sensor, and the communication interface. The controller is configured to control, via the plurality of gate drivers, the plurality of power transistors.
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3.发明公开公开(公告)号：US20240171111A1
公开(公告)日：2024-05-23
申请号：US17989824
申请日：2022-11-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad H. Alvi , Khorshed Mohammed Alam , Jiyu Zhang , Chunhao J. Lee , Brian A. Welchko
IPC: H02P29/028 , H02P27/08
CPC classification number: H02P29/028 , H02P27/08
Abstract: Apparatus and techniques for analyzing a capacitance value in an electric motor inverter are disclosed. A processor is coupled to a DC-AC inverter, which includes a capacitor across its terminals and is powered by a battery. The processor performs resistor switching to enable singular, periodic measurement of the capacitance. The measured value is compared with a nominal or beginning of life (BOL) value. An alert may be sent if the capacitance has degraded beyond a threshold. In other aspects, the DC torque ripple envelop is used to measure capacitance. The outcome is compared with the other tests to assess consistency. An inconsistent outcome may identify potential resistor degradation.
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公开(公告)号：US20220304180A1
公开(公告)日：2022-09-22
申请号：US17838653
申请日：2022-06-13
Applicant: GM Global Technology Operations LLC
Inventor： Muhammad H. Alvi , Rashmi Prasad , Chandra S. Namuduri
IPC: H05K7/14
Abstract: A busbar assembly includes a base having a width and a length. The base has a first surface and a second surface and has a first side and a second side. A distance between the first side and the second side comprises the width, and the base defines a slot centered between approximately 75% and approximately 79% of the width.
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公开(公告)号：US12249944B2
公开(公告)日：2025-03-11
申请号：US17989824
申请日：2022-11-18
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad H. Alvi , Khorshed Mohammed Alam , Jiyu Zhang , Chunhao J. Lee , Brian A. Welchko
IPC: H02P29/028 , H02P27/08
Abstract: Apparatus and techniques for analyzing a capacitance value in an electric motor inverter are disclosed. A processor is coupled to a DC-AC inverter, which includes a capacitor across its terminals and is powered by a battery. The processor performs resistor switching to enable singular, periodic measurement of the capacitance. The measured value is compared with a nominal or beginning of life (BOL) value. An alert may be sent if the capacitance has degraded beyond a threshold. In other aspects, the DC torque ripple envelop is used to measure capacitance. The outcome is compared with the other tests to assess consistency. An inconsistent outcome may identify potential resistor degradation.
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Patent Agency Ranking
公开(公告)号：US20230361771A1
公开(公告)日：2023-11-09
申请号：US17736165
申请日：2022-05-04
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi Prasad , Chandra S. Namuduri , Muhammad H. Alvi , Ronald O. Grover, Jr.
IPC: H03K17/687 , H01L23/053 , H01L23/367 , H01L23/373
CPC classification number: H03K17/687 , H01L23/053 , H01L23/367 , H01L23/3735 , H03K17/04106
Abstract: An electronic solid-state switch assembly includes a base plate and a heat exchanger; an electrically insulating layer and a direct bonded substrate affixed to the base plate; a first terminal and a second terminal; a plurality of power transistors; a plurality of gate drivers; a communication interface, a current sensor, and a snubber circuit; and a controller. The plurality of gate drivers are operatively coupled to the plurality of power transistors. The plurality of power transistors are arranged in parallel on the direct bonded substrate between the first terminal and the second terminal. The plurality of power transistors are electrically connected to the first terminal and to the second terminal. The controller is in communication with the plurality of gate drivers, the current sensor, and the communication interface. The controller is configured to control, via the plurality of gate drivers, the plurality of power transistors.
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公开(公告)号：US20220328270A1
公开(公告)日：2022-10-13
申请号：US17224736
申请日：2021-04-07
Applicant: GM Global Technology Operations LLC
Inventor： Chandra S. Namuduri , Muhammad H. Alvi , Rashmi Prasad
Abstract: A solid-state fuse device includes a switch a gate driver connected to the switch and configured to transition the switch from a closed state to an open state when at least one of an overcurrent measurement exceeds a predetermined overcurrent threshold or a voltage drop across the switch exceeds a predetermined saturation voltage threshold.
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公开(公告)号：US20220224206A1
公开(公告)日：2022-07-14
申请号：US17149152
申请日：2021-01-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming Liu , Anthony M. Coppola , Muhammad H. Alvi
IPC: H02K11/33 , H01L25/07 , H01L23/31 , H01L23/34 , H01L23/373 , H01L23/473 , H01L23/50 , H02K7/00 , H02K11/00 , B60L50/60
Abstract: A planar power module includes a second substrate arranged parallel to a first substrate, with the substrates respectively having a dielectric layer interposed between two conductive layers, such that one of the conductive layers of each substrate together forms parallel external conductive surfaces of the power module. The power module includes direct current (DC) bus bars, alternating current (AC) bus bars, and semiconductor switching dies arranged between the substrates. The dies are electrically connected to the bus bars, with each respective die electrically connected to a conductive layers of the first or second substrates. A polymer molding material partially surrounds the substrates and the switching dies. An electric powertrain system includes an electric machine, a propulsion battery pack, and a traction power inverter module (TPIM) having the power module. The power module is a three-phase full-bridge inverter circuit. An electric powertrain and motor vehicle use the power module.
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公开(公告)号：US20250070586A1
公开(公告)日：2025-02-27
申请号：US18452796
申请日：2023-08-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad H. Alvi , Mohamed Kamel , Chandra S. Namuduri , Suresh Gopalakrishnan
Abstract: A low voltage (LV) charging system for charging a high voltage (HV) rechargeable energy storage system (RESS), such as a HV RESS operable for electrically powering a traction motor of an electric vehicle. The LV charging system may include an input configured for receiving LV electrical power from a LV source and a distributed converter system configured for charging a plurality of modules of the HV RESS via a plurality of charging circuits. The charging circuits may be configured for separately charging one of the modules with a charging electrical power derived from converting the LV electrical power. The LV charging system may further include a controller configured for individually controlling the charging electrical power provided via each of the charging circuits.
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公开(公告)号：US11817750B2
公开(公告)日：2023-11-14
申请号：US17149152
申请日：2021-01-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming Liu , Anthony M. Coppola , Muhammad H. Alvi
IPC: H02K11/33 , H01L25/07 , H01L23/31 , H01L23/34 , H01L23/373 , H01L23/50 , H02K7/00 , H02K11/00 , B60L50/60 , H01L23/473
CPC classification number: H02K11/33 , B60L50/60 , H01L23/3107 , H01L23/34 , H01L23/3735 , H01L23/473 , H01L23/50 , H01L25/072 , H02K7/006 , H02K11/0094 , B60L2210/40 , B60L2220/10
Abstract: A planar power module includes a second substrate arranged parallel to a first substrate, with the substrates respectively having a dielectric layer interposed between two conductive layers, such that one of the conductive layers of each substrate together forms parallel external conductive surfaces of the power module. The power module includes direct current (DC) bus bars, alternating current (AC) bus bars, and semiconductor switching dies arranged between the substrates. The dies are electrically connected to the bus bars, with each respective die electrically connected to a conductive layers of the first or second substrates. A polymer molding material partially surrounds the substrates and the switching dies. An electric powertrain system includes an electric machine, a propulsion battery pack, and a traction power inverter module (TPIM) having the power module. The power module is a three-phase full-bridge inverter circuit. An electric powertrain and motor vehicle use the power module.
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