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Transportation Electrification Conference and Expo (ITEC), 2014 IEEE

Date 15-18 June 2014

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Displaying Results 1 - 25 of 126
  • Author index

    Publication Year: 2014 , Page(s): 1 - 32
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  • Table of contents

    Publication Year: 2014 , Page(s): 1 - 14
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  • Final program

    Publication Year: 2014 , Page(s): 1 - 54
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  • Keynote

    Publication Year: 2014 , Page(s): 1 - 8
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    Provides an abstract for each of the keynote presentations and a brief professional biography of each presenter. The complete presentations were not made available for publication as part of the conference proceedings. View full abstract»

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  • Program-at-a-glance

    Publication Year: 2014 , Page(s): 1
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  • Expert panels at 2014 ITEC [10 panel summaries]

    Publication Year: 2014 , Page(s): 1 - 11
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  • Meeting room floor plan

    Publication Year: 2014 , Page(s): 1
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  • Welcome message from general chair

    Publication Year: 2014 , Page(s): 1
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  • Time-domain steady-state analysis of fixed-frequency series resonant converters with phase-shift modulation

    Publication Year: 2014 , Page(s): 1 - 7
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1014 KB) |  | HTML iconHTML  

    Frequency modulation is often used in series resonant converters (SRC) to gain voltage regulation, which brings challenges for EMI filter and switch driver design. Also the desirable zero voltage switching (ZVS) cannot be maintained at light load conditions. This paper presents time-domain steady-state analysis of fixed-frequency SRC with phase-shift modulation. Three modes of operation are identified based on resonant tank current, a discontinuous and two continuous modes. Analytical expressions for all variables in each mode, ZVS conditions, and the mode boundaries are demonstrated. Exact formulae for current zero crossing moments are reported. Also the condition for existence of three or two modes is provided. View full abstract»

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  • Design and electromagnetic analysis of a novel 3-DOF deflection type permanent magnet actuator

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1317 KB) |  | HTML iconHTML  

    This paper mainly focuses on the design and electromagnetic analysis of magnetic field distribution and torque characteristics of a novel three-degree-of-freedom deflection type permanent magnet actuator based on analytical and 3D finite element method with comparison analysis. The air gap flux density distribution is derived with clear solutions of equations in spherical coordinates. With finite element analysis, different magnetization modes and some key structure parameters' effects on the electromagnetic field and torque characteristics are discussed, and the derived results are presented. The results provide the reference for further design, optimization and control related researches of multi- degree-of-freedom motors or actuators. View full abstract»

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  • A novel 3-DOF sensing methodology for M-DOF PM motors

    Publication Year: 2014 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1218 KB) |  | HTML iconHTML  

    With the rapid advancement of modern high-technologies and demands for dexterous manipulators or drive elements, multi-degree-of-freedom (M-DOF) actuators have widely attracted the attentions of many researchers and been researched. This paper introduces the structure model and application of the method of Distributed Multi-Pole modeling for the rotor position detection, choosing the PM 3-DOF deflection type motor as an example. The model validation is presented based on the simulation modeling of permanent magnets. Simulation results verify the approximate solution and the analytical solution of this model by comparisons. A corresponding experiment platform based on visual interface and ARM single chip unit is built to measure the magnetic field of the permanent magnet of this multi-DOF motor. Simulation and experiment results show the feasibility of the method and experiment platform for further research by providing useful references. View full abstract»

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  • Investigation of key factors influencing the response of permanent magnet synchronous machines to three-phase symmetrical short-circuit faults

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1613 KB) |  | HTML iconHTML  

    This paper investigates the three-phase symmetrical short-circuit characteristics of a permanent magnet synchronous machine (PMSM). Closed-form solutions are derived to predict both the steady-state and transient response of a PMSM to three-phase symmetrical short-circuit (SSC) faults. The developed expressions account for the impact of pre-fault operating conditions and include provisions for incorporating magnetic saturation effects. The influence of machine parameters is studied to identify the key parameters that have a major influence on the steady-state and peak transient values of the fault currents. It is shown that increased inductance saliency ratio, reduced stator resistance, and higher magnetic saturation all increase the peak transient value of the demagnetizing d-axis current. Finite-element (FE) analysis is used to build confidence in the fault current predictions of the developed analytical model. View full abstract»

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  • Average-value modeling of hysteresis current controlled brushless DC motor drives

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (376 KB) |  | HTML iconHTML  

    Current-regulated brushless dc motors have been widely used in electric vehicles. It is important to have accurate and numerically efficient models for system analysis and design. Hysteresis current control has significant advantages, such as fast dynamic response and robustness. This paper presents two new average-value models of motor drives for brushless dc machines under hysteresis current control. The new models are compared with a detailed model in terms of simulation runtime and rms error under a variety scenarios. The proposed average-value models accurately represent the behavior of the drive and can be used in modeling and design. View full abstract»

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  • FPGA based D-PLL control technique of CLL resonant converter for EV battery chargers

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (786 KB) |  | HTML iconHTML  

    In this paper, FPGA based Digital Phase Locked Loop (D-PLL) control technique is applied to the CLL resonant converter for Electric Vehicle (EV) battery charger applications. In order to improve charging efficiency, switching losses must be reduced to have a maximum energy transfer among the variable converter components. Also, fast and secure battery charging requires controlling voltage and current values at the battery terminals. The presented digital phase locked loop control technique is implemented under ZVS-ZCS conditions with variable load and variable input voltages. The designed dc/dc resonant converter, fed by a power-factor-corrector (PFC) with 100-150 V output, provides 48 V / 15 A at 720 W maximum power. At the same time, the battery constant voltage (CV) and current (CC) regulation are realized from PFC with a variable dc link. The application results show that ZVS-ZCS are maintained with input voltage and current in phase under different input voltage and output load conditions. View full abstract»

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  • Investigating safety issues related to Electric Vehicle wireless charging technology

    Publication Year: 2014 , Page(s): 1 - 4
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (853 KB) |  | HTML iconHTML  

    Electric Vehicles (EV) have gained popularity due to environmental concerns, increasing prices of fossil fuel, and a subsequent desire to move toward renewable energy sources; however, it also raises many concerns associated with connections between EV and charger, EV infrastructure and maintenance, as well as its vulnerabilities to inclement weather and vandalism. Wireless Charging (WC), which operates on magnetic resonance for Wireless Power Transfer (WPT), allows these problems to be alleviated. This paper investigated the safety issues associated with thermal effects, electromagnetic (EM) interference voltages induced by the magnetic field near, inside and at the center of an EV WC system, and magnetic field strength. View full abstract»

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  • A fuzzy logic approach for fault diagnosis and recovery in PHEV and EV chargers

    Publication Year: 2014 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (427 KB) |  | HTML iconHTML  

    This paper presents a fuzzy-logic approach for fault diagnosis in a plug-in hybrid electric vehicle (PHEV) or electric vehicle (EV) charger. The approach correlates faults and basic measurements then utilizes fuzzy logic to diagnose a fault. Redundancy is engaged as needed based on the fuzzy logic decision. Experimental validation is first shown for the converter model. Then, a fuzzy system is developed based on correlation of faults and measurements. Faults considered are open-circuit and short-circuit faults in major components. Results show that all faults are accurately detected even though two pairs of faults are confused and are thus both flagged. Design of the fault diagnosis method is shown to be simple and can be applied to a wide array of energy systems. View full abstract»

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  • Design of a wireless charging system used in light-duty electrified automobiles

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (269 KB) |  | HTML iconHTML  

    This study proposes a design and development of Series-Series Compensated topology based (SSC) wireless power transfer system to charge the battery in light-duty electrified automobiles, e.g., electric scooters. An asymmetric resonant methodology is adopted by adjusting the secondary-side resonant capacitance to make the system resonate only at the secondary side, which is different from the prevalent symmetric resonant topology. The experimental data at 250W test matches the simulation result well, which improves the system efficiency. View full abstract»

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  • Current sensor fault-tolerant operation of dual traction inverters using six-phase current reconstruction technique

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (414 KB) |  | HTML iconHTML  

    Fault-tolerant operation of dual traction inverters is vital to reliability of the propulsion system in hybrid electric vehicles (HEVs). This paper presents a six-phase current reconstruction technique for dual traction inverters in case of the failure of phase current sensors. With an extra current sensor installed in the DC link, missing phase currents can be derived from the DC-link current by applying the proposed phase shift strategies to the driver signals. All the current sensor failure scenarios and their corresponding phase shift schemes for current reconstruction are considered. With the proposed current reconstruction scheme, current sensor fault-tolerant operation of dual traction inverters is achieved. Even in the worst case when all the phase currents are missing, the maximum allowable modulation index demonstrates slight degradation. Simulation results are provided to verify the effectiveness of the proposed scheme. View full abstract»

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  • A drive cycle based electro-thermal analysis of traction inverters

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (542 KB) |  | HTML iconHTML  

    This paper presents an electro-thermal simulation model to estimate the power devices junction temperatures of traction inverter. The model includes four sub-systems: hybrid electric vehicle simulation, model of traction motor, temperature dependent power loss model, and the thermal model of traction inverter. Firstly, load profile of the traction inverter is obtained considering the vehicle dynamic, the traction motor, and the drive cycle of the vehicle. Then, instantaneous power loss is calculated by using the load profile of the inverter. Based on the power loss and developed thermal models, junction temperatures of power devices are estimated. With the feedback of the junction temperatures into the power loss model, the temperature dependent power losses are obtained. Therefore, the electro-thermal simulation of traction inverter can be conducted. The electro-thermal model presented in this paper is simulated for the Urban Dynamometer Driving Schedule (UDDS) drive cycle, and the junction temperatures of power devices are obtained. View full abstract»

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  • A hybrid PWM approach for the traction motor control of Alternative Energy Vehicles

    Publication Year: 2014 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (278 KB) |  | HTML iconHTML  

    This paper focuses on high speed control of traction drive system for the Alternative Energy Vehicle (AEV). A hybrid approach is suggested in which a Sine Triangle Pulse Width Modulated (SPWM) inverter is used below the base speed and a square wave inverter is opted above the base speed. The transition between the SPWM and square wave is realized in a unique way by simply setting the frequency of carrier signal equal to zero. Thus the proposed methodology in a way uses only one PWM mode and the transition from the SPWM to square wave is seem less. The torque discontinuity which normally occurs during switching between the modes does not exist in the proposed strategy. The performance of proposed hybrid approach is validated through the simulation and experimental results on a small prototype induction motor for the volts per hertz speed control. View full abstract»

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  • Power electronic converters for 12/8 switched reluctance motor drives: A comparative analysis

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (378 KB) |  | HTML iconHTML  

    In this paper, five popular power electronic converters for three-phase 12/8 switched reluctance motor (SRM) drives including asymmetric power electronic converter, N+1 power electroic converter, split AC power electronic converter, split DC power electronic converter, and C-dump power electronic converter are investigated and compared in terms of device ratings, cost, efficiency, torque ripples, average torque, and copper losses. Comparison results show that C-dump converter is a more promising candidate in high-performance SRM drives, while split AC converter is recommended in low-cost applications. View full abstract»

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  • Design considerations for loosely coupled inductive power transfer (IPT) system for electric vehicle battery charging - A comprehensive review

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (303 KB) |  | HTML iconHTML  

    Recently loosely coupled inductive power transfer (IPT) has gained worldwide attention for battery charging applications for electric vehicles (EVs). Since a high frequency operation is a must for transferring power inductively over a large air gap with reasonable efficiency, a careful design is needed. This paper reviews the basic design considerations for designing such a system. Critical design parameters, such as skin effect, proximity effect (at high frequency), and field-shaping techniques, to reduce leakage flux, has been demonstrated using Finite Element Analysis (FEA). In addition, different compensation technique and control strategies for IPT system has been discussed. View full abstract»

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  • A digital PWM current controller for switched reluctance motor drives

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (332 KB) |  | HTML iconHTML  

    Current control is essential in SRM drives. Conventionally, hysteresis current regulation is utilized for current control in SRM drives, but it has some drawbacks including high sampling rate requirement, sensitivity to switching EMI noise, and varying switching frequency. In this paper, a digital dead-beat PWM current controller for SRM drives is proposed. An observer is introduced to guarantee both fast response and stability of the dead-beat current controller. An improved current sampling method is designed to have a more accurate current sampling and to avoid PWM delay in control loop.. Simulation and experimental results show that the proposed observer increases the dynamic response and improves the performance of the current controller. The improved current sampling method avoids oscillations in the control loop. The proposed digital PWM current controller has almost the same performance as hysteresis current regulation and at the same time, avoids its drawbacks. View full abstract»

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  • Comprehensive review of PV/EV/grid integration power electronic converter topologies for DC charging applications

    Publication Year: 2014 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (231 KB) |  | HTML iconHTML  

    In recent years, there has been great interest in the research and development of electric vehicles (EVs). In the past 5 years, numerous EVs and plug-in hybrid electric vehicles (PHEVs) have been introduced in the market by auto manufacturers. However, with the increase in demand of EVs/PHEVs comes the need to provide charging facilities at convenient locations, for recharging of the on-board batteries. Fast charging is also a necessity for consumer convenience. Therefore, off-board charging infrastructures have to be looked at closely. This need for fast charging is creating a shift in EV charger development work to focus on DC charging facilities. This paper provides an overview of various power converter topologies used for a photovoltaic (PV) and grid connected DC charging infrastructures. Specific focus is placed on Z-source converters that can be used for a single-stage connection of PV, grid, and EV. PWM control techniques for off-board converters are also reviewed in this paper. View full abstract»

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  • Analytical design methodology for Double Stator Switched Reluctance Machine

    Publication Year: 2014 , Page(s): 1 - 6
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (608 KB) |  | HTML iconHTML  

    Double Stator Switched Reluctance Machine (DSSRM) is a novel switched reluctance machine with unique magnetic structure and very high power/torque density. In this paper, an analytical design method based on power expression is presented. General rules for selection of critical parameters is also included. Design of a 100kW, three phase DSSRM is presented as a case study following proposed design procedure. Performace of the machine has been analyzed using finite element method as well. The results validate the effectiveness of the design method. View full abstract»

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