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Transportation Electrification Conference and Expo (ITEC), 2013 IEEE

Date 16-19 June 2013

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Displaying Results 1 - 25 of 95
  • Author index

    Page(s): 1 - 24
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  • Table of contents

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  • Welcome message from general chair

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  • Final program

    Page(s): 1 - 52
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  • Program-at-a-glance

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  • It's about collaboration

    Page(s): 1 - 15
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  • Meeting room floor plan

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  • Wireless power transfer systems

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    Presents the power point presentations from the conference proceedings. The presentation discusses the fundamentals of inductive power transfer and its coupling coil design methodology. View full abstract»

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  • Power electronics thermal packaging and reliability

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    Presents the power point presentations from the conference proceedings. Power electronics is the critical enabling technology at the intersection of renewable power generation, reliable power distribution and transmission, and efficient power utilization and storage. Issues of compact and high power density packaging, thermal management and reliability are the most important research areas for realizing the full potential of power electronics. View full abstract»

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  • “Overview of power electronics product development cycle and fundamentals of charger design”

    Page(s): 1 - 122
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    Presents a collection of slides covering the following topics: transportation electrification; boost topologies; semiconductor loss modeling; diode selection; inductor design; peak current mode; average current mode; hysteresis current; BCM current mode; DCM current mode; voltage loop considerations; current loop considerations; ripple steering; PFC controller IC; California Energy Commission Regulation; PFC performance improvement; DC-DC topologies; mechanical packaging; and product design cycle. View full abstract»

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  • Short course on electromagnetics modeling ACE+ product group

    Page(s): 1 - 59
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    A collection of slides from the author's conference presentation is given. The following topics are discussed: electromagnetics modeling; mathematical modeling; multiphysics coupling; and ACE. View full abstract»

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  • Energy storage for BEVs: An engineering perspective

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    Presents the power point presentations from the conference proceedings. The presentation discusses the fundamentals of secondary batteries, its safety issues and battery management systems. View full abstract»

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  • MBSE the rise of the machines?

    Page(s): 1 - 97
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    This paper present power point presentations from the conference proceedings covering the following topics: global fuel economy; fuel economy/emissions tradeoff; virtual engineering process; overview of transmission system simulation; transmission algorithm development using system simulation model-based systems engineering definition; Autonomie Plug & Play architecture for MBSE; fuel consumption; forecast single component technology; impact of component technologies and powertrain configurations; cost benefit analysis; levelized cost of driving; automotive controls development; vehicle level energy management; engine in-loop block diagram; software-in-the-loop. View full abstract»

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  • A simplified power loss calculation method for PFC boost topologies

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    In this paper, a novel, simple and accurate method is proposed to predict the RMS and average current for each component in the most common continuous conduction mode (CCM) AC-DC power factor correction (PFC) boost derived topologies. The model is based on using the effective duty cycle independent of the switching action. The proposed model enables simple and accurate estimation of powertrain component conduction losses. The paper includes the derivation of the RMS, or average current for the boost and interleaved boost PFC topologies. PSIM simulation and experimental results are used to verify the accuracy of model. Experimental and simulation results of a prototype interleaved boost converter converting universal AC input voltage to 400 V DC at up to 3.4 kW output are given to verify the proposed model. The experimental results demonstrate that the model can correctly predict the RMS and average currents in the interleaved boost topology. View full abstract»

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  • Study of permanent magnet machine based flywheel energy storage system for peaking power series hybrid vehicle control strategy

    Page(s): 1 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (616 KB) |  | HTML iconHTML  

    Transit agencies are increasingly focused on making bus fleets cleaner, more efficient and cost effective by incorporating new clean propulsion technologies. Increased maintenance cost and lower lifetime of battery packs in existing hybrid electric buses have been major bottlenecks in motivating transit bus operators to rapidly switch to this energy efficient technology. Understanding the demerits of the current battery based energy storage technology and merits of the prospective flywheel based energy storage technology for transit bus application, this paper puts an effort to study the permanent magnet synchronous machine based flywheel energy storage system for the aforementioned application. A series transit hybrid bus with peaking vehicle control strategy has been taken into consideration with a macro objective to compare the performance of the battery based and flywheel based hybrid transit bus in terms of fuel consumption and cost of the installed system. However, the focus of this paper remains on the development and study of a 100 kW flywheel energy storage system based on vector control technique which forms the first step towards this macro objective. View full abstract»

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  • Hybrid Energy Storage System (HESS) in vehicular applications: A review on interfacing battery and ultra-capacitor units

    Page(s): 1 - 7
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    One of the key components of every Electric Vehicle (EV)/Hybrid Electric Vehicle (HEV) is the Energy Storage System (ESS). The most widely-used ESS in electric drivetrains is based on batteries. As the specific power of batteries is normally low, they are hybridized with high-specific power storage elements such as ultra-capacitors in a Hybrid Energy Storage System (HESS) to meet harsh power requirements of the vehicle during acceleration and regenerative braking. This paper provides a thorough literature review on various configurations for interfacing battery and ultra-capacitor units to the DC bus forming a HESS in EV/HEV applications. It also reviews the energy management mechanisms used to split the power demand between battery and ultra-capacitor units. View full abstract»

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  • Fault sensitive modeling and diagnosis of PEM fuel cell for automotive applications

    Page(s): 1 - 6
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    In this paper the PEMFC fault diagnosis is based on neural network modeling approach combined to numerical simulation in which a new developed sensitive model of PEMFC has been especially used. In literature the voltage changing is evaluated according to a variation of the total electrical resistance by assuming the same physical parameters (temperature, pressure...) in whole area of the FC cells. The main contribution of this work is to consider a 2D variation of temperature, pressure and humidity within cathode-membrane-anode zone of the PEMFC by using a multi-loops/nods circuit model. Then a NN model has been developed to classify faults and to recognize them on line during the FC operating. View full abstract»

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  • Pulse charger with zero current switching and isolation for electric vehicles and renewable energy applications

    Page(s): 1 - 5
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    Fast charging has become a major concern due to advents of more convenient methodologies of extracting renewable energy with the aid of new technology. Batteries are used widely to store energy and a charging technique that hinders the chemical reactions impeding the current is found. This technique known as pulse charging is thus comparatively fast and has received extensive attention over the last decade. Simultaneously, many fast charging topologies have been developed over the years with their own strengths and weaknesses. In this research a novel pulse charging topology with soft switching and isolation is introduced which facilitates high power pulse charging due to reduced switching losses. View full abstract»

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  • Review and comparison of inductive charging power electronic converter topologies for electric and plug-in hybrid electric vehicles

    Page(s): 1 - 6
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    For the last two decades, significant improvements in charging technologies have been made. Moreover, novel applications have been proposed and tested, obtaining important and promising results. Inductive charging for electric vehicles (EV) and hybrid electric vehicles (HEV) is one of them. Because of the positive impact that this technology represents, it is important to understand the general characteristics of this novel application. This paper aims to give a general understanding of inductive charging systems for EV and HEV. The explanation of what is an inductive power transfer (IPT) transformer and how electrical power is transferred through air is presented. The review of the electrical characteristics of an IPT transformer is shown: derivation of equations and presentation of the equivalent circuit. The analysis and comparison of two different circuit topologies is also covered (series-series and parallel-parallel). Also, to validate the theoretical concepts, an IPT transformer setup with 5cm of air gap is simulated. The plots and circuit simulations where obtained in MATLAB and SIMULINK respectively. View full abstract»

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  • Wavelet-transform based energy and power decoupling strategy for a novel ultracapacitor-battery hybrid power-split gear powertrain

    Page(s): 1 - 7
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    Electrification of performance vehicles brings several challenges such as the necessity of high-power sources, which can satisfy the power requirements during acceleration and efficiently retrieve energy during deceleration, without performance and lifecycle deterioration of such sources. In addition, the limited space under the hood for these vehicles exterminates the possibility of utilizing large volume high-power propulsion machines. This manuscript proposes an efficient wavelet-transform based energy/power decoupling strategy implemented on a unique power-split gear (PSG) based powertrain deploying two propulsion machines with a hybrid battery/ultra-capacitor (UC) energy storage system (ESS) to overcome the limitations associated with electrified performance vehicles. The proposed control and management strategy guarantees that battery provides the base, transient-free power while transients are compensated by ultra-capacitor. With the proposed hybrid ESS and energy/power decoupling strategy, power density of the ESS can be increased, vehicle performance can be improved and battery lifetime can be prolonged. View full abstract»

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  • Study of the electric power balance in a vehicle for the choice of the battery

    Page(s): 1 - 6
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    The number of electrical components in vehicles is day by day increasing, requiring a careful dimensioning of the electric system and a correct choice of the components that will have to provide electrical power to the whole system. The amount of electric energy that may be required during the usage of a car is very variable, depending on how many and which loads are active at the moment; the choice of the power generating elements must then be done in a way that guarantees a certain performance, usually relative to the most critical working conditions that may be encountered by the vehicle in its lifetime. In the present paper a study of the fundamental characteristics of the electric system of a vehicle is proposed with particular attention to the two main components, the alternator and the battery; the fundamental equations for the electric power balance in the vehicle are reported and discussed as a preamble for the implementation of a Matlab model able to simulate the behavior of the charge and discharge of a car battery just considering the overall energy balance. The graphical visualization of the trend of the battery charge over many operating cycles allows the user of the program to choose the battery with the most suitable capacity avoiding oversizing or downsizing of this fundamental component. Particular emphasis has been put on the choice of the requirements that the battery charge has to satisfy throughout its lifecycle. View full abstract»

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  • Extended Kalman Filter based battery state of charge(SOC) estimation for electric vehicles

    Page(s): 1 - 5
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    This paper proposed a battery state of charge (SOC) estimation methodology utilizing the Extended Kalman Filter. First, Extended Kalman Filter for Li-ion battery SOC was mathematically designed. Next, simulation models were developed in MATLAB/Simulink, which indicated that the battery SOC estimation with Extended Kalman filter is much more accurate than that from Coulomb Counting method. This is coincident with the mathematical analysis. At the end, a test bench with Lithium-Ion batteries was set up to experimentally verify the theoretical analysis and simulation. Experimental results showed that the average SOC estimation error using Extended Kalman Filter is <;1%. View full abstract»

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  • Study of misalignment for On Road Charging

    Page(s): 1 - 8
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    A major problem concerning On Road Charging of Electric Vehicles via Inductive Power Transfer (IPT) links is the large variation in power transfer and efficiency due to displacement of the secondary from the primary. This paper looks into this problem referred to as misalignment, both laterally and longitudinally. For lateral misalignment, experimental results were obtained by considering horizontal and vertical coils separately. The technique of combining the quadrature coils to form the quadrature pickup so as to obtain a flatter mutual inductance profile is suggested by directly combining the individual secondary coils. Longitudinal misalignment is particularly of interest when sectional primaries are to be constructed. In case of longitudinal misalignment, unsymmetrical mutual inductance profile at the extremes of the primary was observed experimentally. The concept of “Edge Effect” was introduced to explain the same. A solution to this problem is suggested and the concept of Best Efficiency Point (BEP) introduced. Theoretical efficiencies were obtained to select the best configuration of the primary for power transfer. View full abstract»

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  • SOC estimation for aged lithium-ion batteries using model adaptive extended Kalman filter

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    Rechargeable batteries as an energy source in electric vehicles (EVs), hybrid electric vehicles (HEVs) and smart grids are receiving more attention with the worldwide demand for reduction of greenhouse gas emission. In all of these applications for secondary batteries, the battery management system (BMS) needs to have an accurate inline estimation of state of charge (SOC) of each individual cell in the battery pack. Yet, this estimation is still difficult, especially after substantial aging of batteries. This paper presents a model adaptive extended Kalman filter (MAEKF) method to estimate SOC of Li-ion batteries. This method uses an optimization algorithm to update the EKF model parameters during a discharge period. State of health (SOH) information would be updated while the battery is charged/discharged, (aged). The effectiveness of the proposed method has been verified based on data acquired from a LiFePO4 battery. View full abstract»

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  • Simulation analysis of a pitch trim actuator

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    This paper describes the architecture and modeling of a pitch trim actuator servo drive system designed by Woodward Inc. for a typical midsize business jet aircraft. The PTA system provides secondary pitch control by adjusting a set of trim tabs located on the trailing edge of the elevator surface. Trim tab commands are issued by the trim wheel or the trim switches located on the control stick in the cockpit. Thrust compensation commands and flap position commands may also be sent by the flight computer directly to the PTA system for appropriate pitch corrections. The solution consists of a linear actuator and two electronic control units. Simulation results are presented that demonstrate the accuracy and dynamic performance of the speed control system. View full abstract»

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