Gm Global Technolgoy Operations, Inc.

Other

Continental Automotive Systems Corporation

Shanghai Jiao Tong University

Dongxu Li

Chunhao J Lee

Farzad Samie

Norman K Bucknor

Derek F Lahr

Chi-Kuan Kao

Kumaraswamy V Hebbale

Lei Hao

Suresh Gopalakrishnan

Andrew Leslie Bartos

Kevin B Rober

Neeraj S Shidore

Chandra S Namuduri

Chengwu Duan

Leonid Basin

Dmitriy Bruder

Junfeng Zhao

Yue-Yun Wang

Paul G Otanez

Chen-Fang Chang

Shushan Bai

Yiran Hu

Yongjie Zhu

Alexandru Rajala

Steven E Muldoon

Clinton E Carey

Jun-Mo Kang

Thomas W Nehl

Edward W Mellet

Jian Yao

Bret M Olson

Venkata Prasad Atluri

Chen-fang Chang

Timothy R Stockdale

Su-Yang Shieh

Madhusudan Raghavan

Rashmi Prasad

Muhammad Hussain Alvi

Avoki M Omekanda

Venkatesh Gopalakrishnan

Tito R Huffman

Gary H Paelicke

Brandon D Mazzara

Kumar V Hebbale

James M Hart

Nancy L Johnson

Li Chen

Xiujie Gao

Shifang Li

Zhen J Zhang

Joel H Gunderson

Ioan Napau

Victor M Roses

Michael A Potter

Paul S Lombardo

Peng Peng

Matthew Pruski

Renato Amorim Torres

Ronald Richard Semel

Jeremy V Horgan

Bryan J Williams

David Chris Webert

Jay H Sim

Robert J Horner

Minh-Khai Nguyen

Brenton J Bergkoetter

Colin Hultengren

Amin Abboud

Luke David Shepley

Chengliang Yin

Kurt Alfred Wellenkotter

James L Abington

Velmurugan Ayyanar

Peter Beller

Thomas Weglarz

Ming Cao

Graeme Davidson Whyte

Xingyong Song

John Jancowski-Walsh

Jonathan Wilson

K V Hebbale

Jerry Paul Sagady

Chunhao I Lee

Mark Tadrous

Matthew Rademacher

Michael Ding

Aaron M Sullivan

Chet Daavettila

An electric drive system includes an electric machine having a stator assembly and a rotor assembly. The stator assembly has a plurality of multi-phase stator windings, including a first stator winding and a second stator winding. A first inverter is adapted to feed the first stator winding. A second inverter is adapted to feed the second stator winding. The rotor assembly includes rotor windings having a single phase. A controller is configured to selectively command excitation of the rotor windings with a pulsed field current such that a direct-axis (d-axis) stator flux linkage is generated. A d-axis stator voltage is induced in the first stator winding and the second stator winding by the d-axis stator flux linkage. Pulsed power transfer is enabled through interaction of the d-axis stator voltage and respective d-axis winding currents in the first stator winding and the second stator winding.

Electric drive system with static pulsed power transfer

A system in an electric or hybrid vehicle includes two or more battery packs to power one or more motors of the vehicle to move the vehicle. A controller dynamically activates an operational mode of the vehicle during vehicle operation, the operational mode being one of a plurality of possible operational modes. Each of the possible operational modes defines which of the two or more battery packs are connected to the one or more motors and, based on two or more of the two or more battery packs being connected to the one or more motors, also defines an interconnection among the two or more of the two or more battery packs. The plurality of possible operational modes includes a first operational mode defining a series connection between the two or more battery packs and second operational mode defining a parallel connection between the two or more battery packs.

Multi-voltage vehicle operation

A power control system for a propulsion system of a vehicle includes an energy storage system including a precharge circuit and one or more battery packs. A DC-DC converter is connected to the energy storage system and including a first capacitor, a first plurality of power switches and an inductor. A power inverter module is connected to the DC-DC converter and including a second capacitor and a second plurality of power switches. A controller is configured to pre-charge the first capacitor of the DC-DC converter and the second capacitor of the power inverter module and control operating modes of the DC-DC converter and the power inverter module.

Power control system for DC-DC converter and inverter pre-charging and shutdown

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 vehicle includes a system and method of operating a gearbox of the vehicle. The vehicle includes an interface for entering a desired vehicle acceleration and a processor. The system includes a processor. The processor is configured to receive the desired vehicle acceleration, create an objective function that relates the desired vehicle acceleration to a torque, perform an optimization process on the objective function to determine the torque, and apply the torque to the vehicle to achieve the desired vehicle acceleration.

Vehicle motion control considering dynamic gear ratio for multi-speed drive systems

A system for controlling a transmission state of a vehicle includes a controller connected to a first drive system and a first transmission including a gear system, a first clutch and a second clutch. The controller is configured to receive a request to change from an initial transmission state to a target transmission state when a propulsion torque is applied to the vehicle. The controller is configured to distribute the propulsion torque such that all of the propulsion torque is applied by a second drive system and the first drive system does not provide any propulsion torque to the vehicle, fully release an off-going clutch from the gear system, control a motor speed based on a rotational speed relation of the target transmission state to reduce a slip speed of the on-going clutch, and fully engage an on-coming clutch to put the first drive system in the target transmission state.

Control of transitions between transmission states

A vehicle and a drive system include a method of operating the vehicle. In another exemplary embodiment, a drive system of a vehicle is disclosed. The drive system includes a first sensor, a second sensor and a processor. The first sensor is disposed at a first location of the drive system for measuring a first angle of rotation. The second sensor is disposed at a second location of the drive system for measuring a second angle of rotation. The processor is configured to determine a torque transferred between the first location and the second location based on a difference between the first angle of rotation and the second angle of rotation and control an operation of the drive system based on the torque.

Torque sensing for electric vehicle drive system

A clutch control system for a vehicle includes: a reset module configured to selectively start a reset operation of a clutch actuator of a clutch that engages and disengages an electric propulsion motor to and from a gearset; a target position module configured to perform the reset operation by setting a target position of the clutch actuator to follow a predetermined position profile for the reset operation, the reset operation including (a) opening an orifice between a hydraulic fluid reservoir and an pressure chamber of the clutch actuator (b) closing the orifice after the opening; and a clutch control module configured to actuate the clutch actuator based on the target position thereby performing the reset operation.

Electric motor clutch actuator control systems and methods

A vehicle includes two or more battery packs configured to power a motor. A controller is configured to dynamically activate an operational mode during operation. The operational mode is one of multiple possible operational modes including a first operational mode defining a series connection between the two or more battery packs and second operational mode defining a parallel connection between the two or more battery packs. The connection between the battery packs is controlled by a first plurality of switches. A plurality of low voltage loads are connected to a subset of the battery packs in the battery packs such that a power output of the subset of the battery packs provides full power to the plurality of low voltage loads. The plurality of low voltage loads are connected to only the subset of the battery packs in both the first operational mode and the second operational mode.

An electric vehicle, and braking system and a method of operating the electric vehicle. The braking system includes a mechanical braking system, a regenerative braking system, and a controller. The controller is configured to calculate a total braking torque for operating the electric vehicle at a selected velocity during braking, determine an available regenerative braking torque via the regenerative braking system, calculate a mechanical brake torque for the mechanical braking system from the total braking torque and the available regenerative brake torque, and apply the mechanical brake torque at the mechanical braking system.

Electric vehicle braking strategies for mountain driving

A trip energy estimation system for a vehicle includes a traffic speed module configured to determine an average traffic speed along a projected route, a path information module configured to output path information indicating route features along the projected route, a perceived speed module configured to output a perceived vehicle speed along the projected route based on the average traffic speed and the path information, and a dynamic driving module configured to calculate and output a predicted driver speed based on the perceived vehicle speed and a feedback input indicative of the predicted driver speed. The dynamic driving module is configured to execute a machine learning algorithm to calculate the predicted driver speed.

Traffic-info-incorporated NNT driver model for EV trip energy prediction

A vehicle includes a transmission that performs a method of operating a clutch of a vehicle. The vehicle includes the clutch, an actuator device and a processor. The actuator device includes a piston movable to operate the clutch. The processor is configured to receive a pressure signal indicative of a selected fluid pressure for operating the clutch, determine a position for the piston in the actuator device from the pressure signal, and move the piston to the position to operate the clutch at the selected fluid pressure.

Clutch controls for electric vehicle transmission with modular actuation system

Presented are torque converters (TC) with hydraulic systems for converter feed and clutch control, methods for making/operating such TC assemblies, and vehicles equipped with such TC assemblies. A TC assembly includes a housing that drivingly connects to an electric motor, and an output member that drivingly connects to a multi-gear transmission. Rotatable within the TC housing are a turbine attached to the TC output member and an impeller juxtaposed with the turbine. A lockup clutch disposed inside the TC housing, between the turbine and housing, is operable to lock the housing to the output member. A disconnect clutch disposed inside the housing, between the impeller and housing, is operable to lock the housing to the impeller. A pump is attached to the TC housing and drivingly connected to the motor for feeding fluid into the housing to increase pressure within the TC chamber and activate the lockup and disconnect clutches.

Hydraulic system and control logic for torque converter assemblies

A system for controlling propulsion in a vehicle includes a switching system connected to a battery system connected to a drive unit and to one or more electrical loads by a propulsion bus. A controller is configured to control the switching system to vary a voltage applied to the drive unit. The controller is configured to receive a request to transition between operating modes, the transition including a change of a voltage applied to the drive unit from an initial voltage level to a target voltage level. The controller is configured to sequentially perform deactivating the one or more electrical loads, based on the target voltage being higher than the initial voltage, pre-charging the one or more electrical loads, based on the target voltage being lower than the initial voltage, performing a discharge procedure, and operating the switching system to apply the voltage at the target voltage level.

Voltage control of multi-battery systems

An electric machine includes: a first stator winding including first and second stator winding portions; a second stator winding including third and fourth stator winding portions; a third stator winding including fifth and sixth stator winding portions, where inputs of the stator windings are configured to be connected to phases, respectively, of an inverter; and switches connected between the stator winding portions and outputs of a power source.

Battery charging systems and methods via electric machine

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Troy, MI, United States of America

Dongxu Li