Gm Global Technology Operations LLC

Delphi Technologies, Inc.

Other

Dynalloy, Inc.

Chandra S Namuduri

Suresh Gopalakrishnan

Lei Hao

Thomas W Nehl

Rashmi Prasad

Muhammad Hussain Alvi

Venkata Prasad Atluri

Avoki M Omekanda

Michael G Reynolds

Kenneth J Shoemaker

Alexandru Rajala

Lyall Kenneth Winger

Alan L Browne

Balarama Vempaty Murty

Norman K Bucknor

Chunhao J Lee

Alireza Fatemi

Yilun Luo

Madhusudan Raghavan

Dongxu Li

Neeraj S Shidore

Nancy L Johnson

Alan G Holmes

Yunjun Li

Farzad Samie

Timothy J Talty

Paul W Alexander

Yue-Yun Wang

Xiujie Gao

Sanjeev Manubhai Naik

John C Ulicny

Derek F Lahr

Dave G Rich

Nilesh D Mankame

Brian A Welchko

Nikolai K Moshchuk

Chengwu Duan

Jihan Ryu

Shifang Li

Robert S Conell

Keith D Van Maanen

Eugene Victor Gonze

Jun-Mo Kang

Gary Lee Jones

Xinyu Du

Edward L Kaiser

Michael Livshiz

Jin-Woo Lee

James Holbrook Brown

Andrew J Namou

John Neal Owens

Kevin B Rober

Flavio Nardi

Varsha K Sadekar

Derek L Patterson

Satish P Ketkar

Mark A Voss

Nick S Kapsokavathis

Bakhtiar Brian Litkouhi

Shuqing Zeng

Paul M Najt

Michael J Paratore, Jr

Paul Edward Krajewski

William Conrad Albertson

Christopher Paul Henry

Robin Stevenson

Upali Priyantha Mudalige

Chen-Fang Chang

Shawn Harold Swales

William R Cawthorne

Hanho Yun

Richard J Skurkis

Anthony L Smith

Anthony M Coppola

Michael J Karagoulis

Rohit Dev Gupta

Chang H Kim

Andrew J MacDonald

William R Rodgers

Yiran Hu

Mike M McDonald

Jenne-Tai Wang

Richard Edward Longhouse

Bon Ho Bae

Jan Henning Aase

Joseph K Moore

Mohammad N Anwar

Mark A Golden

Sai Vishnu Aluru

Thomas Allen Baudendistel

Sean E Gleason

Scott Thomas Droste

Norman Mark Wereley

Nicholas W Pinto

Rassem Ragheb Henry

Mark A Kramarczyk

Anthony James Corsetti

Ming Liu

Mark Wayne Long

Scott Joseph Chynoweth

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.

Low parasitic equivalent series L-inductance (ESL) symmetric direct current (DC) link capacitor

A system for providing updates in a vehicle includes a server device configured for providing an OTA campaign update and the vehicle. The vehicle includes a device including software to be upgraded by the over-the-air campaign update and a low voltage battery providing low voltage power. The system further includes a battery providing high voltage power and an accessory power module configured to transform the high voltage power into low voltage power and including programming to estimate an available power of the low voltage battery. The system further includes a controller monitoring the available power, comparing the available power to a threshold, and, when the available power is less than the threshold, commanding the accessory power module to transform the high voltage power to provide the low voltage electrical power. The controller further schedules receiving the update based upon the available power and updates the device with the update.

Method and system to optimize power utilization using an alternative power converter while operating vehicle software updates

A multi-phase power inverter for an electric propulsion system includes a plurality of X-type multilevel power converters arranged between a high-voltage direct current (DC) power supply and an electric machine. Each of the plurality of X-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.

System for mutual inductance cancellation for X-type multilevel converters

A vehicle system includes a first battery pack connected to a second battery pack via multi-level inverter. A motor is connected to the multi-level inverter. A controller is connected to the motor and the multi-level inverter. The multi-level inverter is a neutral point clamped inverter. The controller includes a memory storing instructions configured to cause the controller to control the multi-level inverter as a direct current (DC)-DC converter such that a circulating current passes through the motor, the first battery pack and the second battery pack.

Using a multilevel neutral point clamped inverter

AC current heating of a battery is performed using a half-bridge based quasi-resonant circuit.

Battery heating system

An electric vehicle includes a system performing a method of charging a battery of the electric vehicle. The system includes an electrical motor having a rotor and a plurality of windings. The vehicle is turned off to allow the rotor to come to rest at an initial rotor position. The processor controls a current through the motor to rotate the rotor to locate a boundary of an electrical lash region associated with the rotor, determines a selected winding of the plurality of windings having a phase vector located close to the electrical lash region, deactivates the selected winding, controls flow of a first current through the motor with the selected winding deactivated to rotate the rotor towards a direction of the selected winding, and controls flow of a second current from a charging station to the battery through the electric motor with the rotor rotated towards the selected winding.

Charging through electric drive system with minimum torque disturbance

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.

Choke device for an electric machine system

An electric motor control system includes an alternating current (AC) electric motor having a first phase input, a second phase input, and a third phase input, and an AC electrical energy source having a first phase output, a second phase output and a third phase output. The system also includes conductors coupled between the phase outputs of the AC electrical energy source and the phase inputs of the AC electric motor. The electric motor control system also has circuitry that further includes a rectifier with phase inputs coupled to the conductors. The rectifier produces a rectified voltage between a positive rectifier output and a negative rectifier output. The system additionally includes an energy storage element coupled across the positive rectifier output and the negative rectifier output and a voltage limiting diode coupled to the positive rectifier output to limit a voltage of the positive rectifier output.

Overvoltage mitigation system

A method is provided that includes determining whether to perform a load shed operation for a vehicle. The method further includes responsive to determining to perform the load shed operation, issuing a command to a device to perform the load shed operation. The method further includes determining whether the device performed the load shed operation. The method further includes responsive to determining that the device failed to perform the load shed operation, opening a relay associated with the device to prevent power from being delivered to the device.

Load shedding for a vehicle

An electric vehicle includes a drive system that performs a method of transferring power between a vehicle and an external location. The drive system includes a battery, a rectifier, and a processor. The rectifier is one of a two-level rectifier and a multi-level rectifier. The processor is configured to connect the rectifier between an alternating current (AC) port of an outlet of an external location and the battery. The rectifier is configured to convert between an AC power at the AC port on an external side of the rectifier and a direct current (DC) power at a vehicle side of the rectifier in order to transfer power bi-directionally between the external location and the battery.

Method and apparatus for integrated bi-directional charging

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.

Multilevel direct current power source powering multilevel inverter

An electric propulsion motor system includes a cylindrical stator and rotor, a fluid circulation system providing pressurized fluid, and conductors within winding slots. The stator has a yoke and a plurality of teeth extending radially inward from the yoke, with winding slots defined between adjacent teeth. Respective tooth tips extend circumferentially into adjacent winding slots and are radially adjacent to a first conductor within the winding slot, with a first channel through which pressurized fluid flows.

Motor with stator tooth tip cooling

An electric power system has a power inverter system with a quasi-resonant circuit (QRC), and a controller, and couples a DC power supply to an electric machine. The power inverter system includes a positive inverter bus and a negative inverter bus; first paired switches; a positive DC bus terminal; and a negative DC bus terminal. The QRC includes an inverter inductance device, a capacitor, a first bus switch, and a second bus switch. The inverter inductance device and the second bus switch are arranged in series between the positive inverter bus and the first switch node, and the first bus switch is arranged between the positive DC bus terminal and the positive inverter bus. The controller is configured to control the QRC to generate an alternating current in the DC power supply.

System for generating thermal heat in an electric power system and an electrified powertrain

A variable slew rate gate drive system for powering an electric machine. The system may include a gate driver operable for controlling each of a plurality of hybrid switch power modules between opened and closed states to facilitate powering the electric machine. The gate driver may be operable for selecting slew rates and controlling ON and OFF states of first and second semiconductor switches included as part of each power module to optimize powering of the electric machine by varying the slew rates as a function of performance characteristics of the first and second semiconductor switches.

Variable slew rate gate driver for hybrid switch power module

An energy transfer system includes a conversion device configured for partial power processing and configured to regulate current from a first battery system, and a controller configured to control the conversion device to adjust a first voltage of the first battery system to conform the first voltage to a second voltage of a second battery system, the second battery system connected in parallel with the first battery system by a bus. The conversion device is configured to receive power from the first battery system, cause a selected portion of the power to flow through a conversion stage to adjust the first voltage, the selected portion corresponding to a difference between the first voltage and the second voltage, cause a remaining portion of the power to flow directly to the bus and bypass the conversion stage, and output a current from the conversion device at the second voltage.

Energy transfer among mismatched battery systems

Growing community of inventors

Troy, MI, United States of America

Chandra S Namuduri