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公开(公告)号：US20230387787A1
公开(公告)日：2023-11-30
申请号：US17826592
申请日：2022-05-27
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Suresh Gopalakrishnan , Lei Hao
CPC classification number: H02M1/143 , H02P27/085 , B60L50/51 , B60L50/60 , H02M7/5395
Abstract: A power control system for an electric vehicle comprises N power inverters configured to connect to a battery system of the electric vehicle. Each of the N power inverters includes a plurality of power switches, where N is an integer greater than one. The N power inverters are configured to connect to stator phase windings of N electric machines, respectively. A controller is configured to determine a switching frequency for the N electric machines and (N−1) phase offsets for (N−1) ones of the N electric machines, generate a set of pulse width modulation (PWM) switching signals at the switching frequency for a first one of the N power inverters, and output (N−1) sets of PWM switching signals to the (N−1) ones of the N electric machines based on the set of PWM switching signals and the (N−1) phase offsets.
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公开(公告)号：US20200278936A1
公开(公告)日：2020-09-03
申请号：US16290495
申请日：2019-03-01
Applicant: GM Global Technology Operations LLC
Inventor： Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI , Lyall K. WINGER , Dave G. RICH
IPC: G06F12/121 , G06F1/26
Abstract: A modular dynamically allocated capacity storage system (MODACS) is provided and includes a housing and a control module. The housing includes source terminals, switches, cells, and sensing module. The source terminals supplying power at a first voltage potential to a first plurality of loads and power at a second voltage potential to a second plurality of loads. The cells are configured to supply power to each of the source terminals based on states of the switches. The sensing modules are configured to determine parameters of each of the cells and generate corresponding status signals. The control module is configured to receive a power request signal, and based on the power request signal and the parameters of each of the cells, determine a connected configuration for the cells relative to each other and the plurality of source terminals and set states of the switches according to the connected configuration.
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公开(公告)号：US20230080123A1
公开(公告)日：2023-03-16
申请号：US17549324
申请日：2021-12-13
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Yusheng ZOU , Lei HAO , Chengwu DUAN , Jian YAO , Chandra S. NAMUDURI
Abstract: A power control system includes a battery system and a DC-DC converter with first, second, third, and fourth power switches. A second terminal of the first power switch is connected to a first terminal of the second power switch. A second terminal of the third power switch is connected to a first terminal of the fourth power switch. A first inductor includes a first terminal connected to the second terminal of the first power switch and the first terminal of the second power switch and a second terminal connected to the second terminal of the third power switch and the first terminal of the fourth power switch. A first bypass switch is connected in parallel to the first power switch. A second bypass switch is connected in parallel to the third power switch.
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4.发明申请公开(公告)号：US20220294376A1
公开(公告)日：2022-09-15
申请号：US17195727
申请日：2021-03-09
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad H. ALVI , Alireza FATEMI , Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI
Abstract: An electric machine disposed within a housing includes a stator, a rotor, and one or more point field detectors. The stator receives current from an inverter. The rotor is connected to and rotating a shaft based on a magnetic field generated by the stator. The one or more point field detectors are configured to detect leakage flux within the housing. The stator, the rotor and the one or more point field detectors are disposed within the housing.
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公开(公告)号：US20220201845A1
公开(公告)日：2022-06-23
申请号：US17132242
申请日：2020-12-23
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi PRASAD , Chandra S. NAMUDURI , Muhammad H. ALVI
Abstract: A bi-directional solid state switch includes: a first bus bar; a second bus bar; a first solid state switch implemented on a first printed circuit board (PCB), the first solid state switch including: a first control terminal; a first terminal electrically connected to the first bus bar; and a second terminal; and a second solid state switch implemented on a second PCB, the second solid state switch including: a second control terminal; a third terminal electrically connected to the second terminal of the first solid state switch; and a fourth terminal electrically connected to the second bus bar.
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Patent Agency Ranking
公开(公告)号：US20200280197A1
公开(公告)日：2020-09-03
申请号：US16290602
申请日：2019-03-01
Applicant: GM Global Technology Operations LLC
Inventor： Lyall K. WINGER , Dave G. RICH , Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI
Abstract: A battery includes: a first terminal; a second terminal; a plurality of individually housed batteries; a plurality of switches configured to connect ones of the individually housed batteries to and from ones of the first and second terminals; and a switch control module configured to: at a frequency, vary a voltage applied to a gate of one of the switches, the one of the switches configured to connect at least one of the individually housed batteries to one of the first and second terminals; and diagnose whether a fault is present in the one of the switches based on a voltage across the one of the switches.
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公开(公告)号：US20230313771A1
公开(公告)日：2023-10-05
申请号：US17708125
申请日：2022-03-30
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Thomas W. Nehl , Avoki M. Omekanda , Suresh Gopalakrishnan
CPC classification number: F02M61/06 , F02M51/0664 , F02M57/005 , F02M61/166 , F02M61/188 , F02M61/168 , F02M2200/24 , F02M2200/8084 , F02M2200/9053
Abstract: A valve system of a vehicle includes: a housing that is electrically conductive and made of a metal and that includes: an inlet configured to receive a fluid; an outlet configured to output the fluid; and a fluid channel fluidly connecting the inlet and the outlet; a pintle disposed within the housing and that is electrically conductive and made of a metal; a ball that is mechanically fastened to the pintle, that is configured to close the outlet, and that is electrically conductive and made of a metal; an armature that is mechanically fastened to the pintle, that is disposed within the housing, and that is electrically conductive and made of a metal; a solenoid coil that is disposed within the housing and that surrounds the pintle; and an electrically insulative material configured to insulate the pintle from the housing.
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公开(公告)号：US20230291321A1
公开(公告)日：2023-09-14
申请号：US17706726
申请日：2022-03-29
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Ming LIU , Muhammad Hussain ALVI , Chandra S. NAMUDURI
IPC: H02M7/00 , H02M7/5387 , H02M7/5388 , H02P27/08
CPC classification number: H02M7/003 , H02M7/53875 , H02M7/5388 , H02P27/08
Abstract: A power module includes: a first substrate layer that is disposed on a first plane; a second substrate layer that is disposed on a second plane that is parallel to the first plane; first and second electrical conductors that are configured to be electrically connected to first and second direct current (DC) reference potentials, respectively, and that extend outwardly from the power module on a third plane that is parallel to the first and second planes; third, fourth, and fifth electrical conductors that are configured to be electrically connected to first, second, and third alternating current (AC) reference potentials, respectively, and that extend outwardly from the power module on a fourth plane that is parallel to the first, second, and third planes; and a plurality of dies of switches, respectively, disposed between the first and second substrate layers.
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公开(公告)号：US20230150378A1
公开(公告)日：2023-05-18
申请号：US17550004
申请日：2021-12-14
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Lei HAO , Chandra S. NAMUDURI , Chengwu DUAN , Suresh GOPALAKRISHNAN , Neeraj S. SHIDORE , Venkata Prasad ATLURI
CPC classification number: B60L53/20 , H02M3/158 , H02J7/0042 , H02J7/0013 , B60L53/16 , H02J2207/20 , B60L2210/10 , H02J2207/40
Abstract: A power control system for a vehicle includes a charge port and a contactor connected to the charge port and including a first plurality of switches. An energy storage system includes a second plurality of switches and one or more battery packs. A bi-directional DC-DC converter is connected between the energy storage system and a plurality of vehicle loads. A controller is configured to control states of the first and second plurality of switches to configure in a plurality of modes including a range improvement mode, a first charging mode to perform charging at a first voltage level, a second charging mode to perform charging at a second voltage level, a battery preconditioning mode; and an accessory load support mode.
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公开(公告)号：US20220286072A1
公开(公告)日：2022-09-08
申请号：US17191050
申请日：2021-03-03
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Suresh GOPALAKRISHNAN , Chandra S. NAMUDURI , Lei HAO , Muhammad H. ALVI , Alireza FATEMI
IPC: H02P21/22 , H02P27/08 , H02M7/5387
Abstract: A motor control system includes: a d-q target module configured to, based on a target torque of an electric motor, determine a first target d-axis current and a first target q-axis current; an offset module configured to, based on a capacitor current through capacitors connected across phases of the electric motor, determine a d-axis current offset and a q-axis current offset; an adder module configured to determine a second target d-axis current based on a sum of the first target d-axis current and the d-axis current offset and to determine a second target q-axis current based on a sum of the first target q-axis current and the q-axis current offset; and a driver module configured to, based on the second target d-axis current and the second target q-axis current, switch switches of a current source inverter (CSI) module configured to apply power to the phases of the electric motor.
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