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 “"Flywheel"”.
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Passive stabilization of flywheel magnetic bearings
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1980.
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Compensador para cargas de comportamento aleatório baseado em Flywheel
… effects produced by an electric arc furnace. A flywheel composed by a squirrel cage induction machine is proposed to make the active power smoothing possible. The applicability of the dual inverter topology to the flywheel control is studied. The compensation strategy and the converters control …
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Design of electric vehicle propulsion system incorporating flywheel energy storage
… power batteries, ultracapacitors and high speed flywheels are the potential high power sources that could be used. Out of these, the high speed flywheel in combination with a mechanical transmission is an attractive high power source for the battery electric vehicle due to its favourable …
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High-speed permanent magnet motor generator for flywheel energy storage
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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High Speed flywheel and test rig design for rural energy storage
… acid. In this thesis, an electromechanical flywheel energy storage device is proposed as an alternative to a lead acid battery in order to increase efficiency, life expectancy, increased high depth of discharge, low life cycle cost and elimination of adverse environmental effects. Due to …
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Development of a power electronics for a flywheel energy storage system
… of a power electronic circuitry for a flywheel energy storage system is discussed in the following aspects. First, due to the nature of permanent magnet brushless DC motor/generator, the operation of three-phase voltage source inverter/rectifier can be simplified to that of a …
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ENHANCEMENT OF HIGH-SPEED FLYWHEEL ENERGY STORAGE VIA CARBON-FIBER COMPOSITE REINFORCEMENT
This study on the enhancement of high-speed flywheel energy storage is to investigate composite materials that are suitable for high-speed, high-energy density for energy storage and/or energy recovery. The main motivation of the study is to explore the application of the flywheel in the aviation …
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Effective utilization of flywheel energy storage (FES) for frequency regulation service provision
… the power system of storage devices known as flywheel energy storage (FES). In this thesis, we investigate the effective utilization of FES for frequency regulation service provision via the competitive markets for such service. The FES utilization in frequency regulation service provision …
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Analysis and feedback control of magnetic bearings with reference to flywheel energy storage.
… bearing most suitable for energy storage flywheels is selected and analysed for the purpose of designing feedback control loops. A nonlinear as well as a small signal linear model of the "current driven" magnetic bearing with unlaminated magnetic components is derived. Subsequently …
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Design of a spherical vehicle with flywheel momentum storage for high torque capabilities
A novel method for supplementing the propulsion of a spherical ground vehicle was conceived and developed. The addition of angular momentum storage via counter-rotating control moment gyroscopes is proposed in order to overcome significant limitations in the performance of earlier designs of …
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Flywheel energy storage for carrying the daily peak loads of electric power systems
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Electrical Engineering, 1949.
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Finite element modelling and analysis of composite flywheel disk including effects of filament-winding mosaic pattern
… levels in the thin filament-wound composite flywheel disk could be underestimated in case of a structural analysis using the conventional mechanics of laminated structures. The layers of the filament-wound composite flywheel disk are reinforced with radially varying fibre trajectories that …
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A methodology for evaluating and reducing rotor losses, heating, and operational limitations of high-speed flywheel batteries
Flywheel batteries are machines that store kinetic energy in the form of a rotating flywheel. Energy is transferred to and from the flywheel via a motor-generator mounted on the flywheel rotor. For mobile systems in particular, it is important to maximize the stored energy while minimizing the mass …
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The Capabilities and Limitations of Flywheel-based Energy Storage System Pertaining to Subways in the Event of a Power Outage
… of a blackout. With the implementation of a flywheel system, the trains stuck and stranded can be pulled to a nearby station in the event of a blackout. With the utilization of MATLAB/Simulink, this study compares various scenarios, including different types of trains (local and express), to …
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A Comparative Study on the Effects of Eccentric Flywheel Overload and Traditional Resistance Training on the Physiological/Functional Performance in Healthy Older Adults
… (Traditional resistance training and Eccentric flywheel overload training) have been suggested as effective means of combating these age-related declines and are of interest to us in this study. Limited research exists however, ascertaining the superiority of either training method. Purpose: …
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Physical model of a hybrid electric drive train
A motor and flywheel system was designed to simulate the dynamics of the electric drive train and inertial mass of a hybrid electric vehicle. The model will serve as a test bed for students in 2.672 to study the energy losses between the battery, motor, and kinetic energy of the car during …
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Performance and emissions of compression ignition engine fueled with preheated blend of vegetable oil
… acids value and flash points. Brake power, flywheel torque, (in term of hydrocarbon, carbon monoxide, carbon dioxide, oxygen content and smoke opacity) and tested for performance and emission. Results obtained show that flywheel torque that has been produced from the biodiesel fuels are less …
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DFIG-Based Split-Shaft Wind Energy Conversion Systems
… is adjusted to store the energy. Accordingly, a flywheel is mechanically coupled with the rotor of the DFIG. Employing the HTS in such a configuration allows the turbine controller to track the point of maximum power (MPPT) while the generator controller can adjust the generator speed. As a …
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Control Designs for Low-Loss Active Magnetic Bearing: Theory and Implementation
… have been proposed for use in Electromechanical Flywheel Batteries. In these devices, kinetic energy is stored in a magnetically levitated flywheel which spins in a vacuum. The AMB eliminates all mechanical losses, however, electrical loss, hich is proportional to the square of the magnetic flux, …
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Design of a stabilization method for cable suspended camera systems
… a controller was designed to be used with a flywheel to steady the system in response to a disturbance. In simulation, the controller reduced the settling time by four orders of magnitude, but was ultimately deemed infeasible to implement.
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