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 26 for “"electrical machine"”.
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Partial verification of a computer aided electrical machine design program.
… Institute of Technology. Dept. of Electrical Engineering and Computer Science.
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. Presently, the well-established condition monitoring techniques are based on steady-state analysis of various …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
Condition monitoring of electrical machines is a field which continuously demands improvement, especially as the tasks performed by these machines become more demanding and complex. Presently, the well established condition monitoring techniques are based on steadystate analysis of various …
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The application of advanced signal processing techniques to the condition monitoring of electrical machine drive systems
… in its application to condition monitoring of electrical machine drive systems. The mathematical and signal processing tools which are explored are wavelet analysis and a non-stationary adaptive signal processing algorithm. Four specific applications are identified for the research. These …
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Digital simulation of a four-winding, uniform air-gap, rotating AC electrical machine for dynamical analysis studies,
Thesis (Mech. E.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1969.
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Design of a High Specific Power Electric Machine for 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 provided that megawatt-class …
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Partial discharge measurements in high voltage motors.
… in the stator winding of a high voltage electrical machine. This technique forms part of an on-line health monitoring strategy for the insulation of high voltage machines. Existing diagnostic techniques and partial discharge measurement systems are reviewed. The requirement for an on-line …
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Control and design of multi-use induction machines : traction, generation, and power conversion
An electrical machine can be made to convert electrical power while performing in its primary role of transforming electrical energy into mechanical energy. One way of doing this is to design the machine with multiple stator windings where one winding acts as a primary for drive and power, and the …
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Computer aided design of a switched reluctance motor
… as an indispensable part of the CAD system for electrical machine design. An illustration of the method is presented for the design of a switched reluctance motor.
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Optimisation of electrical machines using data-driven dynamic thermal models and surrogate-based multi-objective evolutionary algorithms.
This thesis addresses two challenges that electrical engineers face when designing electrical machines: managing heat generated during operation and reducing the time required to obtain optimal designs. Heat negatively affects machine performance, shortens lifespan, and can ultimately cause …
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Magnetic properties measurement of new magnetic material : SOMALOY 700 (5P)
… to the evolution of technology. The invention of electrical machines has enabled human to do their chores with easier and more comfortable way. Presently, electromagnetic technology is improving day by day and most of the current electrical machines require the magnetic cores to operate at higher …
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High Speed flywheel and test rig design for rural energy storage
… on the flywheel rotor profile design, robust electrical machines, simple power electronics and a low cost bearing set. Low loss magnetic bearings are also possible but were limited by time while also making their maintenance complex especially in rural areas. Conventional high strength …
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Switched-doubly-fed-machine drive for high power applications
… control operating as an interface between the electrical machine and the electrical source. These drives are not only critical in a wide range of applications including industrial processes, electric propulsion systems, and power generation plants but also becoming increasingly relevant for …
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The performance of high voltage; outdoor insulation in polluted environments
… one end of it was connected to the globe of an electrical machine, and at the other a lead ball was hung in order to perceive when the matter reached it. After five or six turns of the wheel, the matter had passed along the whole wire and communicated its virtue to the ball, which instantly …
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Electromagnetic-thermal modeling for high-frequency air-core permanent magnet motor of aircraft application
… candidates, which is not favorable for current electrical machine software. Therefore, developing electromagnetic (EM) and thermal analytical methods with computational efficiency and decent accuracy is a key enabling factor for future multi-physics optimization of motor power density. In this …
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Linear generators for direct drive marine renewable energy converters
… a large force, which must be reacted by an electrical machine in a direct drive system. Attention is focused on the development of two novel topology linear permanent magnet machines suitable for use in this application. For each topology, models are presented that are capable of predicting …
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Additive Manufacturing of Electrical Machines and Electronic Devices
… in the additive manufacture of electronics and electrical machines have led to successful demonstrations of 3D-printed passive (e.g., resistors, capacitors, inductors) and active (e.g., transistors) electronic components, as well as magnetic cores and power transfer devices. However, each new …
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Condition monitoring of induction motors in the nuclear power station environment
The induction motor is a highly utilised electrical machine in industry, with the nuclear industry being no exception. A typical nuclear power station usually contains more than 1000 motors, where they are used in safety and non-safety application. The efficient and fault-free operation of this …
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Slot discharge characteristics of high voltage machines.
… with discharge pulse propagation and rotating machine insulation diagnostic measurement techniques. In particular, movement of stator coils in the slots of large machines under the influence of naturally occurring electromagnetic forces leads to physical abrasion of the corona screen, and …
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Terminal Behavioral Modeling of Electric Machines for Real-time Emulation and System-level Analysis
… systems. With ever-increasing application of electrical machines by means of electrification of vehicles, airplanes and shipboards, detailed study of the relating dynamics is very important to ensure the proper implementation and stable behavior of the overall system. In this work, the …
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