Gm Global Technology Operations LLC

Delphi Technologies, Inc.

Other

Dynalloy, Inc.

Suresh Gopalakrishnan

Chandra S Namuduri

Lei Hao

Thomas W Nehl

Muhammad Hussain Alvi

Avoki M Omekanda

Chunhao J Lee

Dongxu Li

Lyall Kenneth Winger

Venkata Prasad Atluri

Rashmi Prasad

Yue-Yun Wang

Neeraj S Shidore

Norman K Bucknor

Yilun Luo

Madhusudan Raghavan

Alireza Fatemi

Kenneth J Shoemaker

Sanjeev Manubhai Naik

Dave G Rich

Paul W Alexander

Farzad Samie

Xiujie Gao

Derek F Lahr

Balarama Vempaty Murty

Alan L Browne

Brian A Welchko

Xinyu Du

Edward L Kaiser

Chengwu Duan

Michael G Reynolds

James Holbrook Brown

Shifang Li

John Neal Owens

Kevin B Rober

Nancy L Johnson

Alan G Holmes

Shuqing Zeng

Paul G Otanez

Chen-Fang Chang

Nikolai K Moshchuk

William R Cawthorne

Michael Livshiz

Richard J Skurkis

Jin-Woo Lee

Yiran Hu

Bon Ho Bae

Varsha K Sadekar

Satish P Ketkar

Nicholas W Pinto

Fang Deng

James Morrison

David W Walters

Pranjal Sharma

Yongjie Zhu

Alexandru Rajala

Junfeng Zhao

Paul S Lombardo

Junghoon Kim

Venkatesh Gopalakrishnan

Peng Peng

Renato Amorim Torres

Derek L Patterson

Keith D Van Maanen

Mark A Voss

Orgun A Guralp

Thomas J Schoepf

Alexander Millerman

Malakondaiah Naidu

Aragorn Zolno

Vinod Chowdary Peddi

Khorshed Mohammed Alam

Bryan M Ludwig

Mohamed Kamel

Bojian Cao

Kausalya Singuru

William T Ivan

Scott R Kloess

Chen-fang Chang

Shuonan Xu

Mark J Rychlinski

Alberto Lorenzo Vassallo

Rajeev Vyas

Robert R Bolio

Peter Bostwick

Alan B Martin

Bruno P B Lequesne

Daniel Robert Tylutki

Mohamed Ahmed Kamel Ahmed

David J Brooks

Minh-Khai Nguyen

Xiaohui Du

Ross Feller

Markus Demmerle

Tony J Deschutter

Jeffrey R Aldrich

Mazharul Chowdhury

Infane Lowe

Sai Rajagopalan

Mark C Hoinka

A system includes an inverter configured to output multiphase alternating current (AC) currents to an electric motor, the multiphase AC currents including a first phase current and a second phase current, the inverter including a set of switches for each phase current. The system also includes a switching controller operably connected to each set of switches, the switching controller configured to control a gate driver connected to a switch of the set of switches, the switching controller configured to determine a time difference between a first switching event of a first phase and a second switching event of a second phase during a switching cycle, and control a switching speed of the switch based on the time difference.

Control of switching speed in a multiphase inverter

A motor system includes a rechargeable energy storage system, an alternating current motor, and a power inverter. Multiple efficiency maps may be provided, each representing a specific combination of control parameters and associated settings. The maps relate the motor's operating space (torque and speed) to corresponding efficiency solutions. The combination of control parameters and settings that yields the highest motor system efficiency at an operating point may be determined from the multiple efficiency maps and used in controlling the motor.

Motor system control

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

Embodiments include an electric motor having asymmetric-turn windings and a vehicle including the same. The electric motor includes a rotor and a stator having a first set of windings having a first number of turns and a second set of windings having a second number of turns that is different than the first number of turns. The first set of windings are galvanically isolated from the second set of windings.

Electric motor with asymmetric-turn windings and a vehicle having the same

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

Some embodiments disclosed herein are directed to constraint handling for parameters of electric motors. In particular, embodiments of the present disclosure relate to handling constraints for parameters such as current, voltage, and torque associated with an electric motor. Other embodiments may be disclosed or claimed.

Constraint handling for electric motor parameters

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

Power transfer in an electric motors including segmented windings utilize control commands. A control system determines a d-axis command voltage for a secondary winding of an electric motor and a q-axis command voltage for the secondary winding based on a primary winding voltage, primary winding current, secondary winding current, and rotor electrical position. The control system generates gate control signals based on the determined d-axis command voltage and q-axis command voltage for the secondary winding and transmits the gate control signals to an inverter coupled to the secondary winding to control an electrical power transfer between the primary winding and the secondary winding.

Power transfer for electric motors with segmented windings

Techniques are provided for torque ripple mitigation. In one embodiment, the techniques involve determining a first torque ripple at a torque output of a target electrical machine, upon determining that the first torque ripple exceeds a threshold, reproducing the torque output based on a pair of gamma control sets, determining a second torque ripple at the reproduced torque output, upon determining that the second torque ripple falls below the threshold, generating qualified gamma controls based on the gamma control sets, and supplying the qualified gamma controls to the target electrical machine.

Torque ripple mitigation

A power control system for a battery system includes a resistor including a first terminal and a second terminal. A normally closed transistor includes a first terminal, a second terminal and a control terminal. The first terminal of the transistor is connected to a second terminal of the resistor and the second terminal of the transistor is connected to a second terminal of the battery system. A capacitor includes a first terminal connected to the first terminal of the resistor and a second terminal connected to the second terminal of the battery system. A power inverter includes a first terminal connected to the first terminal of the resistor, a second terminal connected to the second terminal of the battery system and an output connected to a load.

Discharge system for DC capacitors with active loss control

A dual inverter open winding machine for a vehicle. The machine may include an electric motor, a first energy source, a first inverter, a second energy source, and a second inverter. The first inverter may include a plurality of first switches independently operable between an opened position and a closed position to selectively connect and disconnect a first direct current (DC) port and a first alternating current (AC) port with one or more of the first energy source, the first inverter, and the motor. The second inverter may include a plurality of second switches independently operable between an opened position and a closed position to selectively connect and disconnect a second DC port and a second AC port with one or more of the second energy source, the second inverter, and the motor.

Dual inverter open winding machine for vehicle with electric power takeoff

A battery system for an electric vehicle includes at least one battery cell configured to store charge for powering an electric vehicle, a high voltage bus electrically coupled with the at least one battery, a DC-DC converter electrically coupled with the battery cell, a low voltage bus electrically connected between the DC-DC converter and at least one vehicle electrical component, and a cell monitor electrically coupled with the at least one battery cell and the DC-DC converter, wherein the cell monitor includes a current sensor configured to detect a current from the at least one battery cell to the DC-DC converter. The cell monitor includes a controller configured to estimate a state of charge of the at least one battery cell according to the current detected by the current sensor, and adjust switching operation of the DC-DC converter according to the current detected by the current sensor.

Current sensors for battery cells of a vehicle battery system

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Troy, MI, United States of America

Suresh Gopalakrishnan