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1.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：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：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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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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Patent Agency Ranking
公开(公告)号：US20180313283A1
公开(公告)日：2018-11-01
申请号：US15583296
申请日：2017-05-01
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
CPC classification number: F02D41/029 , B60W20/16 , B60W30/1882 , F01N3/021 , F01N3/0842 , F01N3/103 , F02D41/0275 , F02D41/3005 , F02D41/405 , F02D2041/026
Abstract: A vehicle propulsion system includes an internal combustion engine configured to output a primary output torque and at least one fuel injector arranged to supply fuel to a combustion chamber of the engine. The propulsion system also includes at least one exhaust aftertreatment device to capture combustion byproducts within an exhaust flow. The propulsion system also includes an electric machine coupled to the engine to exchange torque. A controller is programmed to supply a baseline fuel injection corresponding to a first engine output to satisfy a driver torque demand and to periodically supplement the baseline target fuel injection quantity to increase engine output torque to overshoot the first engine output thereby increasing combustion byproducts to regenerate the at least one exhaust aftertreatment device. The controller is also programmed to apply a resistive torque from the electric machine such that an overall propulsion system torque remains at the driver torque demand.
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7.发明公开公开(公告)号：US20240239236A1
公开(公告)日：2024-07-18
申请号：US18097379
申请日：2023-01-16
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Mohamed Ahmed Kamel AHMED , Muhammad Hussain ALVI , Suresh GOPALAKRISHNAN
IPC: B60L58/18
CPC classification number: B60L58/18 , B60L2210/10 , B60L2240/525 , B60L2240/527 , B60L2240/529
Abstract: An energy storage system includes a plurality of batteries coupled in series, a plurality of DC-DC power converters each having first and second sides, a DC bus coupled to the second sides of the DC-DC power converters, and at least one controller coupled to at least one DC-DC power converter. Each of the DC-DC power converters is configured to operate in a plurality of operating modes. The at least one controller configured to receive a plurality of operating characteristics of the at least one DC-DC power converter and a plurality of setpoints, select an operating mode of the plurality of operating modes for the at least one DC-DC power converter, and control the at least one DC-DC power converter to operate in the selected operating mode based on at least one of the operating characteristics and at least one of the setpoints.
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公开(公告)号：US20230344293A1
公开(公告)日：2023-10-26
申请号：US17729216
申请日：2022-04-26
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Rashmi PRASAD , Chandra S. NAMUDURI , Lei HAO , Suresh GOPALAKRISHNAN
Abstract: A method includes: selectively actuating switches of an inverter module and first, second, third, and fourth switches of a motor; and charging a battery with power from a charger using at least one of first, second, and third stator windings of the motor, the battery having a first voltage and being electrically connected in parallel with the inverter module, and the charger having a second voltage that is less than the first voltage.
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公开(公告)号：US20170033716A1
公开(公告)日：2017-02-02
申请号：US14810738
申请日：2015-07-28
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Chandra S. NAMUDURI , Suresh GOPALAKRISHNAN
Abstract: A generator system includes an AC machine including a plurality of armature coils and a rectifier circuit electrically coupled to the armature coils. The rectifier circuit includes a plurality of switches. The generator system additionally includes a sensor device electrically coupled to a control circuit. The sensor device is configured to determine a rotor position of the AC machine. The control circuit determines a desired phase angle between a phase current and an induced voltage of the AC machine and provides a control signal to the rectifier circuit to switch the switches on and off to convert an AC signal to a DC signal and to control the rotor position of the AC machine to achieve the desired phase angle.
Abstract translation: 发电机系统包括AC电机，其包括多个电枢线圈和电耦合到电枢线圈的整流器电路。 整流电路包括多个开关。 发电机系统还包括电耦合到控制电路的传感器装置。 传感器装置被配置成确定AC电机的转子位置。 控制电路确定相电流和交流电机的感应电压之间的期望的相位角，并向整流电路提供控制信号以开关和接通开关，以将交流信号转换为直流信号并控制转子 交流电机的位置实现所需的相位角。
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公开(公告)号：US20230299695A1
公开(公告)日：2023-09-21
申请号：US17699261
申请日：2022-03-21
Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Inventor： Muhammad Hussain ALVI , Chandra S. NAMUDURI , Suresh GOPALAKRISHNAN , Chunhao J. LEE , Lei HAO , Yue-Yun WANG , Rashmi PRASAD
CPC classification number: H02P5/74 , H02J7/0063 , H02J7/0013 , H02P23/14
Abstract: A power control system comprises a battery system including N battery packs. A plurality of contactors selectively connects N battery packs of a battery system in a first configuration supplying a first voltage level, a second configuration supplying a second voltage level, and a disconnected configuration. M power inverters connect the battery system to M electric machines, respectively. A controller is configured to determine when to transition between the first configuration and the second configuration. The controller is configured to transition between the first configuration and the second configuration by causing one of a positive torque transient and a negative torque transient to be generated by at least one of the M electric machines, transitioning the battery system from one of the first configuration and the second configuration to the disconnected configuration, and transitioning from the disconnected configuration to the other one of the first configuration and the second configuration.
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