Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 44 for “"Electric machine"”.
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Finite element analysis of 3D electric machine problems
… efficient numerical simulation tool to analyze electric machine problems. As one of the largest fossil energy consumers, electric machines have to be designed properly with robust simulation tools that are capable of handling the inherent complexity, such as multiple materials, complicated …
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Plasma sprayed ceramic coatings for electric machine insulation
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Electric Machine Differential For Vehicle Traction Control And Stability Control
… and tightening regulations for reliable electric drivetrains drive the advancement of the hybrid electric (HEV) and full electric vehicle (EV) technology. Different configurations of EV and HEV architectures are evaluated for their performance. The future technology is trending towards …
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Mechanical design of high frequency, high power density electric machine
In recent years, electric vehicles have demonstrated great economic and environmental advantages in the transportation industry due to the advance of battery and power converter technologies. However, large-scale commercial aircraft electrification is hindered by the technology gap of electric …
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Design of a High Specific Power Electric Machine for Turboelectric Propulsion
The benefits of turboelectric propulsion for aviation, in which a gas generator core electrically drives motor-powered propulsors, are limited by the mass and losses of the electric components introduced into the drivetrain. These propulsion systems are predicted to result in a 15\% fuel savings …
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Increasing Electric Machine Power Density With a New End-winding Cooling System
One of the key challenges for the electric vehicle industry is to develop high-power-density electric motors. Achieving higher power density requires efficient heat removal from inside the motor. For high performance electric motors, water-jacket cooling systems are usually used to remove heat …
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A two-phase spherical electric machine for generating rotating uniform magnetic fields
… and construction of a novel two-phase spherical electric machine that generates rotating uniform magnetic fields, known as a fluxball machine. Alternative methods for producing uniform magnetic fields with air-cored solenoidal magnets are discussed and evaluated. Analytical and numerical models …
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Modeling, Manufacturing, and Experimental Validation of an Electric Machine for Aircraft Propulsion
… is part of an effort at MIT to develop a 1-MW electric machine which achieves the specific power necessary for hybrid-electric aviation: 13 kW/kg [1]. The models for torque and core loss used in the design of the 1-MW machine are revised and expanded based on experimental results obtained from …
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Independent power flow control of multiple energy sources using a single electric machine
… different energy sources connected to a single electric machine with a multitude of three-phase winding sets has been investigated. These machines are highly suitable for high power and critical applications. Additionally, these machines utilise the well-established three-phase power electronics …
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System level optimization of electric machine and transmission for Hybrid and Battery Electric Vehicles
L'abstract è presente nell'allegato / the abstract is in the attachment
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Application of the time-domain finite-element method to analysis of 3D electric machine problems
… method (TDFEM) to the simulation of 3D electric machine problems. The features of the problems might include low-frequency excitation, high inhomogeneity in the material parameters, complex geometries and nonlinearity in the materials. The proposed formulations and algorithm aim at …
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Development of a Power Hardware-in-the-Loop Test Bench for Electric Machine and Drive Emulation
… hardware-inthe- loop (PHIL) platform to emulate electric machines for the purpose of a motor drive testbench with a particular focus on induction machine emulation. PHIL presents advantages over full-hardware testing of motor drives as the PHIL platform can save space and cost that comes from the …
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Development, manufacture, and qualification of stator components for a high-speed electric machine intended for aerospace applications
… and materials have enabled innovative electric machine (EM) designs. At the same time, the environments and applications in which these electric machines are being used are becoming more and more demanding. For example, electric vehicles require electric motors that do not consume a …
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Power Density Optimization of SiC-based DC/AC Converter for High-Speed Electric Machine in More/All-electric Aircraft
The increasing shift towards more electric or all electric aircraft urgently necessitates dc/ac converter systems with high power density. Silicon Carbide (SiC) devices, known for their superior performance over traditional silicon-based devices, facilitate this increase in power density. …
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Airgap-less Electric Motor
… dissertation focuses mainly on the airgap-less electric machine. An extensive literature review has been presented along with a systematic study that included analytical modeling, simulation with both steady-state and transient analysis, prototype building, and experimental validation. In this …
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Development of a high power density rotor
High specific power electric machines are crucial to enabling electric and hybrid-electric aircraft. In order to meet this need, a high specific power electric machine with an unconventional topology is being developed. The topology creates mechanical challenges including expansion due to high speed, …
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A composite material approach towards induction machine design using planar layer models
The three-phase squirrel cage induction machine has seen evolutionary, not revolutionary, advancements since its conception over 100 years ago. At its most basic level, the design has remained very close to its roots. This thesis emphasizes electric machine synthesis through the development of …
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Integration of Filter Elements in Electric Drives
Electric drives are becoming widely accepted and are found in hybrid electric vehicles and in higher-end home appliances. Traditional drive designs separate the power electronics and the electric machine, which reduces the potential for integration and the possibility of beneficial opportunities. …
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Technology Demonstration of a Megawatt-Class Integrated Motor Drive for Aircraft Propulsion
… purposes. An outer-rotor permanent magnet electric machine reduced-order model framework that captures critical structural, thermal, and electromagnetic constraints is developed to identify key enabling technologies for maximizing specific power. A tooth-and-slot stator with an outer rotor …
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