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 58 for “"Synchronous machine"”.
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Direct digital control of a synchronous machine
… affecting the operation of a variable speed synchronous machine drive.
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Abrupt change of load on a synchronous machine
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1927
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Electromagnetic fault analysis for high specific power permanent magnet synchronous machine
… for a high specific power 1 MW permanent magnet synchronous electric machine designed for aerospace applications. As the high specific power of 13.3 kW/kg of the machine is to be achieved by pushing the design parameters such as mechanical speed, electric current, and temperature, the importance …
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Optimization of a magnetically saturable interior permanent-magnet synchronous machine drive
Interior permanent magnet (IPM) synchronous machines are attractive because they can achieve constant-power operation over a wide speed range with limited magnet strength requirements and reduced power electronics cost. These characteristics provide the IPM machine with advantages over alternative …
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Mechanical design and validation of 1 MW permanent magnet synchronous machine (PMSM)
… design to double the power density of electric machines, bringing us closer to electrified propulsion. This thesis focuses on the mechanical analysis and design for a specially designed 1 MW permanent magnet synchronous electric machine. First of all the design intention or design topology will …
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Regression Function Characterization of Synchronous Machine Magnetization and Its Impact on Machine Stability Analysis
… affects the performance of electrical machines. In the performance analysis of electrical machines, an accurate representation of the magnetization characteristics in the machine model is important. As a part of this research work, two new mathematical models are proposed to represent …
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Regression Function Characterization of Synchronous Machine Magnetization and Its Impact on Machine Stability Analysis
… affects the performance of electrical machines. In the performance analysis of electrical machines, an accurate representation of the magnetization characteristics in the machine model is important. As a part of this research work, two new mathematical models are proposed to represent …
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Power System Stability Improvement with Decommissioned Synchronous Machine Using Koopman Operator Based Model Predictive Control
… support. This is referred to as decoupled synchronous machine system (DSMS). On top of that, the grid-side converter is capable of providing reactive power as an auxiliary voltage controller. However, in a practical setting, for power utilities, the detailed state equations of such device …
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Design, Analysis and Experimental Evaluation of a Virtual Synchronous Machine Based Control Scheme for STATCOM Applications
… of the power plant. Further, the virtual synchronous machine (VSM) concept has recently been introduced to control grid-connected inverters emulating the behavior of rotating synchronous machines, in an effort to eliminate the shortcomings of conventional d-q frame phase-locked loops …
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A new structure of 12Slot-10Pole field-excitation flux switching synchronous machine for hybrid electric vehicles
… 12Slot-10Pole-field excitation flux switching synchronous machine (FEFSSM) with all active parts of the field excitation coil (FEC) and the armature coil is located in the stator, used for hybrid electric vehicles (HEVs). Design of the new structure different from the previous design which no …
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Next Generation Grid-Tied Inverters with Virtual Synchronous Machine Features for Grid Services and Grid Support
L'abstract è presente nell'allegato / the abstract is in the attachment
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Multi-Time-Scale Modeling and Aggregation of Higher Order Synchronous Machine Models (Power Systems, Reduced, Singular Perturbation)
… with the reduced order modeling of electric machines and interconnected power systems using singular perturbation and multi-time-scale techniques. First, a sound mathematical framework for the various reduced order models of synchronous machines found in the literature is obtained and several …
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Mitigation of Asymmetrical Currents in Permanent Magnet Synchronous Machine with Unbalanced Stator Winding Impedance for Electric Vehicle Application
The electric drive system of a permanent magnet synchronous machine (PMSM) with stator winding impedance asymmetry draws unbalanced three-phase stator currents if the conventional current control scheme is employed. Due to these asymmetrical stator currents, some issues such as uneven heating of …
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Position estimation of an outer rotor permanent magnet synchronous machine using linear hall-effect sensors and neural networks
… position for an outer rotor permanent magnet synchronous machine (PMSM). PMSMs are increasingly used as prime movers in electric vehicles such as cars and bicycles, and the precise control of these machines requires reliable feedback of the rotational position of the rotor. Conventional …
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The calculation of three-phase short-circuit currents of a synchronous machine by means of the differential analyzer
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering, 1932
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Virtual Synchronous Machine based Fuzzy V-F Control for VSC of Battery Storage System for Seamless Performance of Microgrid
This thesis presents seamless transition between the grid-connected and islanded mode of microgrid. The prominence of the seamless transition is to maintain the load voltage and frequency as well as constant power delivery during both the modes of operation of microgrid. In this thesis, voltage …
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Analysis of volts per hertz scalar control as governor of high pole count, high frequency, permanent magnet synchronous machine
The student, Katherine O'Kane, accepted the attached license on 2017-04-20 at 11:04.
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Three-dimensional analytical model with skin effect dedicated to the prediction of the eddy current loss in the permanent magnet in permanent magnet synchronous machine
… in the permanent magnet for a permanent magnet synchronous machine with a rated power of 1 MW and an efficiency of 97%. In order to achieve an ambitious power density of 8 hp/lb, which is twice the state-of-the-art value, the machine uses an air cooled system for reducing weight. This thesis …
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Real-time digital simulation of the generator model
… system simulator and which consists of the synchronous machine and its peripheral controllers such as the exciter and the governor-turbine subsystems. In this work, the exciter, the synchronous machine, the machine dynamics and the governor are modeled in detail while a simplified model of …
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Modeling and simulation of selected distributed generation sources and their assessment
… will be obtained as dynamic. Also, the detailed synchronous machine and the excitation system model are obtained for the standard simulation. The simulation will be performed with an infinite bus system model. The synchronous machine is connected with a local load in order to develop the terminal …
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