Grainger CEME

Center for Electric Machinery and Electromechanics

Variable-Pole Induction Machines for Electric Vehicles

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Elie Libbos with adviser A. Banerjee High power density, high efficiency, inexpensive drivetrains operating over a wide speed range are critical for traction applications. An induction machine (IM) offers a cost-effective, rugged and reliable alternative to permanent magnet solutions. Figure 10 shows the torque-speed characteristic of a conventional fixed-pole motor designed at six-poles. Beyond the […]

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Structural Design and Validation of a 10 MW Off-Shore Wind Turbine

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Joshua Feldman with adviser K. Haran Structural design and validation of a 10 MW off-shore wind turbine for an ARPA-E funded project was completed as shown in Figure 9. This design consists of thin steel-sheet elements stacked together and is based on a study conducted by the University of Lappeenranta (Finland) on structural designs of […]

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Maximum Power-Point Tracking for an Integrated Generator-Rectifier System

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Phuc Huynh with adviser A. Banerjee Ac-to-dc power conversion is essential in many emerging high-power applications, including wind-power generation and electrified transportation. Collecting electrical energy through a dc form allows the prime mover, such as a wind turbine or a gas turbine, to operate at variable speeds, enabling maximum power point tracking (MPPT) or leading […]

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Electromagnetic Losses Modeling in a High Power, High Frequency Permanent Magnet Machine Considering Power Electronics Drive Switching Harmonics

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Xiaolong Zhang with adviser K. Haran Electric propulsion has been proposed for large commercial aircraft to reduce fuel use and/or emissions, potentially achieving significant environmental and economic benefits. A high-power, high-frequency permanent magnet synchronous machine (PMSM) drive system is being developed to meet the stringent weight requirements in the aircraft application. The machine employs a […]

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Co-design of an Integrated Direct-Drive Electric Motor and Ducted Propeller for Aircraft Propulsion

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John Reband with adviser K. Haran Previous research on weight optimization for superconducting electric machines within efficiency thresholds has focused solely on machine efficiency. Integrating these machines with aircraft for propulsion applications requires an understanding of how the machine-design parameters trade off with overall system efficiency. The propulsive efficiency of a propulsion motor and direct-drive […]

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Design of a Hydrogen-Based Cooling System

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Joshua Feldman with adviser K. Haran A cryogenic cooling system for a fully superconducting machine is being researched as part of the NASA-funded Center for High-Efficiency Electric Technologies for Aircraft (CHEETA). A topology for this cooling system, shown in Figure 2, has been designed and modeled in computer-aided design software. This model includes a heat […]

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Analysis and Experimental Validation of Superconducting-Machine Technologies for Hydrogen-Powered Electric Aircraft Propulsion

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Balachandran Thanatheepan with adviser K. Haran The Center for Cryogenic High-Efficiency Electrical Technologies for Aircraft (CHEETA) is a NASA-funded project that aims to design an ultra-efficient (99%) electrical system with high specific power (>25 kW/kg) required for commercial electric aircraft. The system uses liquid hydrogen both as the energy source for the fuel cells and […]

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2019—2020 Illinois Solar Decathlon

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The University of Illinois Solar Decathlon team (Team Illinois) is designing an energy-efficient sustainable house adaptable to user requirements. The modular home is capable of attaching and detaching to units, while also sporting multi-functional furniture. These capabilities allow the inhabitant to design their home based on their need while allowing for both upscaling and downscaling. […]

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A Distributed Spring-Aided Vertical Electromechanical Spine for Bio-Inspired Robots

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MS student Bonhyun Ku with advisor A. Banerjee Biological mechanisms are incorporated in mobile robots to interact with their environments. Although existing biologically inspired robots perform well, their performance is limited by the lack of a spine. A vertebrate spine provides agility, a wide range of motion, balance, and efficiency. Often the robot design involves […]

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Distributed Secondary Frequency Control in AC Microgrids with Lossy Electrical Networks

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PhD student Siddhartha Nigam with advisors A. Domínguez-García and P. Sauer The microgrid concept is a promising approach to enable efficient integration and management of distributed energy resources (DERs). In the microgrid islanded mode, frequency control is a major problem due to the prevalence of inverter-interfaced DERs leaving the microgrid with low or no rotating […]

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