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  • Discussion of the Grainger Center for Electric Machinery and Electromechanics

    Collaborative Network: an Overview of Machines and Energy on a National Scale

    P. Krein, P. Chapman Grainger Center for Electric Machinery

    and Electromechanics Dept. of Electrical and Computer Engineering

    University of Illinois at Urbana-Champaign

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Introduction

    • CEME Collaborative Network (in order of visits) – Purdue University – University of California at Berkeley – Georgia Institute of Technology – University of Wisconsin – Madison – The Ohio State University – Oregon State University

    • Highlights of one or two activities at each school • Time for discussion of directions and needs

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Purdue University

    • Electromechanical and systems requirements for more-electric naval vessels. – Transform the fleet, not just a ship. – System requirements and vulnerabilities have

    changed: in the last several major naval incidents, physical damage was limited but system failure was complete.

    – Must be able to function through first-level damage.

    www.defenseindustrydaily.com

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Purdue University

    • Genetic-algorithm-based system-level optimization. – Examples include optimization based on mission

    requirements. – Optimize operation subject to rational damage

    scenarios. • Ultra-fast simulation

    – Applying approaches that perform time simulation faster than real time.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    University of California at Berkeley

    • Direct electromechanical generation from engines – Integrated generator methods for Stirling engine. – The figure of merit for energy conversion is really

    cost per output joule. Efficiency is less germane. • Microengines

    – Rotary engine at millimeter scale with integrated generator.

    – Favorable possibilities relative to batteries and small fuel cells.

    • Robot microactuators

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    University of California at Berkeley

    • Interests in PWM modulation processes and noise management.

    • Much interaction with industry in areas of analog integrated circuits and integrated power.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Georgia Institute of Technology

    • Program size on a par with Illinois (Ga Tech and Illinois are the largest ECE programs).

    • Hosts NEETRAC, a power test facility transferred from Georgia Power.

    • Interaction with mechanical engineering. • New faculty member in analog and power

    integrated circuits.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Georgia Institute of Technology

    • Online diagnostics for machines – Interpret current waveforms for various problems. – Applications include internal failures, bearing

    condition monitoring, imbalance detection. – Certain classes of problems are hard to distinguish.

    Various combinations of forward-sequence, backward-sequence, and d-q transformation concepts can help.

    • In smaller machines, bearing failures are the most common failure mechanism.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Georgia Institute of Technology

    • Machine design is actively taught. • One example: small generator to optimize

    power extraction from a reciprocating source.

    • Do the extraction directly rather than with (lossy) mechanical linkages for continuous motion.

    • Global energy challenges: in many areas, 100 W-hr/day would make a substantial impact on living conditions.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    University of Wisconsin

    • Strong industry support and industry programs.

    • “Self-sensing” drive technologies in which sensors are integrated with machines or with drive circuits.

    • Very strong experimental activity, including a number of drives at a range of power levels.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    University of Wisconsin

    • “Modular machines” – Discrete pole arrangements that can be

    assembled in piecewise fashion. – Opportunity to integrate pole-based drives with

    individual machine poles. – Challenge in dimensional consistency and rigidity.

    • Good interaction between aspects of power systems and aspects or machines and power electronics.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    The Ohio State University

    • Analysis-based machine design is alive and well. Several industrial projects.

    • Example: discrete-pole machine with high pole count for washing machine application.

    • Work on dual-rotor machines for flexible applications.

    • Example: concentric machine with one PM rotor and one induction rotor. Provides an electric differential action.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    The Ohio State University

    • Ohio State maintains one of very few high voltage labs.

    • Lab work is directed at dielectrics and insulation, and to a lesser extent at operational issues in power systems.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Oregon State University

    • Strong effort right now in ocean wave energy.

    • Challenge: convert vertical motion to electricity.

    • Direct conversion is needed.

    eecs.oregonstate.edu

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Oregon State University

    • Interesting aspect: the political and social efforts associated with licenses and siting.

    • Even very careful and diligent preparation leads to a long, involved process.

    • The Oregon Coast has sufficient wave energy potential to more than supply the entire state.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Discussion

    • Outside of CEME, much electromechanics work seems to divide into various camps.

    • Few researchers exploring broad design questions or attempting “apples to apples” technology comparisons.

    • Design automation and design optimization remain excellent topics for current researchers.

  • Grainger Center for Electric Machines and Electromechanics University of Illinois at Urbana-Champaign

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    Discussion

    • Innovations in electromechanics play a dominant role in energy as a whole. – Efficient machines would drop energy

    requirements substantially. – Broad use of ac drives also yields high impact. – Electric and hybrid vehicles. – Other more-electric systems for ships, aircraft,

    and many off-road mobile systems.