Relevant bibliographies by topics / 621.314.2 / Dissertations / Theses
To see the other types of publications on this topic, follow the link: 621.314.2.

Dissertations / Theses on the topic '621.314.2'

Author: Grafiati
Published: 30 May 2022
Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic '621.314.2.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Василевський, Володимир Валентинович. "Прогнозування строку служби силового трансформатора за допомогою комплексної моделі технічного стану целюлозної ізоляції". Thesis, Національний технічний університет "Харківський політехнічний інститут", 2019. http://repository.kpi.kharkov.ua/handle/KhPI-Press/39553.

Full text
Abstract:
Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.01 – електричні машини й апарати. – Національний технічний університет "Харківський політехнічний інститут", Харків, 2019 р. Дисертацію присвячено удосконаленню математичних моделей для прогнозуванню залишкового ресурсу силового трансформатора та техніко-економічного обґрунтування стратегії його технічного обслуговування шляхом розробки комплексної моделі технічного стану целюлозної ізоляції. Запропоновано комплексну модель технічного стану целюлозної ізоляції, яка складається з математичної моделі формува
APA, Harvard, Vancouver, ISO, and other styles
2

Ayob, Afida. "Assessment of single phase SRM converters for low power applications." Thesis, University of Newcastle upon Tyne, 2011. http://hdl.handle.net/10443/3587.

Full text
Abstract:
The switched reluctance machine (SRM) is the least expensive machine to produce yet is very reliable. The drive system for an SRM has to be designed so that there is integration between the machine and the converter-controller configuration. This thesis represents a study relating to power electronic converters for single-phase switched reluctance machine drives with emphasis on the cost of implication of the converters. The study of the converters results in the proposal of a new converter concept based on minimising the cost contribution of the dc link capacitor. By reducing the size of the
APA, Harvard, Vancouver, ISO, and other styles
3

Jensen, Bogi Bech. "An investigation of Toroidally Wound Induction Machines." Thesis, University of Newcastle upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512153.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Hart, Nigel T. "Functionally graded interfaces for solid oxide fuel cells :." Thesis, Brunel University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.445940.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Chambers, Keith David Robert. "An integrated diesel gen-set control system with pre-emptive fuelling and proactive load relief." Thesis, Queen's University Belfast, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492329.

Full text
Abstract:
Diesel generating set load acceptance performance has deteriorated in recent years due to a number of influencing factors. Market forces have demanded that a higher power output is achieved for a given engine displacement, whilst global concern and awareness of climate change has led to the introduction of increasingly stringent emissions legislation. In order to provide satisfactory load acceptance performance, whilst maintaining compliance with the growing restrictions placed on operation, more sophisticated control and protection features are required than would be provided with the traditi
APA, Harvard, Vancouver, ISO, and other styles
6

Green, Alexander Nicholas Michael. "Modulatory charge recombination dynamics in dye-sensitive solar cells." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428505.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Fernández, Oscar. "Electromechanical characterisation of PP EMFi." Thesis, Bangor University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412567.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Phillips, Neil William. "Application of high temperature superconductors to electric drives." Thesis, Cardiff University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.521460.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Zulu, Ackim. "Flux switching machines using segmental rotors." Thesis, University of Newcastle Upon Tyne, 2010. http://hdl.handle.net/10443/1070.

Full text
Abstract:
Flux switching machines (FSM) employing a segmental rotor have field and armature systems on the stator and a presentation of an unexcited rotor with isolated segments. The single-tooth winding arrangement on the stator provides a potential for material and energy savings. The principle for producing bipolar flux in the armature stator teeth relies on the natural switching of the armature tooth flux, accomplished by the moving segments of the rotor. Three phase configurations have been studied, from conception and design to construction and testing, with field excitation provided by either a f
APA, Harvard, Vancouver, ISO, and other styles
10

Pinguey, Edwin. "On the design and construction of modulated pole machines." Thesis, University of Newcastle Upon Tyne, 2010. http://hdl.handle.net/10443/993.

Full text
Abstract:
This thesis presents two designs for modulated pole machines from concept through to validating prototypes, each comparing favourably with other modulated pole machines. The key feature to these designs is that they employ novel fabrication techniques which are realisable in low cost manufacture without compromise in performance. This is achieved by reviewing the specific properties of soft magnetic composite and laminated steel. Each material was then utilised in such a way as to take best advantage of its distinguishing properties leading to the development of novel fabrication and construct
APA, Harvard, Vancouver, ISO, and other styles
11

Miti, Gideon Kalebe. "Control of brushless D.C. motor drives." Thesis, University of Manchester, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557126.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Cotton, Ian. "Lightning protection of wind turbines." Thesis, University of Manchester, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578062.

Full text
APA, Harvard, Vancouver, ISO, and other styles
13

Silva, Peththadurage S. Narendra De. "Analysis of N-phase induction machines using a generalised decoupled vector space theory." Thesis, Heriot-Watt University, 2006. http://hdl.handle.net/10399/2151.

Full text
Abstract:
A generalised analysis method for N-phase induction machines is presented. The Nphase system is analysed using 2N degrees of freedom. A new conceptual view of a multi-phase system using an N-dimensional vector space has been developed. It is shown that such an N-dimensional vector space can be decoupled into 'h(N+PJ independent two dimensional vector planes, where if N is odd, p=l, otherwise P=O. Each vector plane is shown to be the combination oftwo positive and negative sequence components ofthe same phase order. Each vector space is shown to be independent and can be controlled separately b
APA, Harvard, Vancouver, ISO, and other styles
14

Issa, Rihman H. "An investigation of efficient control strategies for a PWM inverter driven induction motor." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/11783.

Full text
Abstract:
Recent developments in power electronics switching devices have led to significant improvements in AC drives which, coupled with the obvious advantages of squirrel-cage induction motors, have generated a customerled demand for an increase in AC drive performance. This thesis describes the design and construction of a 3-phase pulsewidth modulated inverter using gate turn-off (GTO) thyristor switching devices, which drives a 0.75 kW 3-phase squirrel-cage induction motor. The inverter control circuit comprises a purpose-built large-scale integrated circuit, which generates the 3-phase pwm drive s
APA, Harvard, Vancouver, ISO, and other styles
15

Saleh, Kamel Subhi. "Sensorless Control of High Power Induction Motors Using Multilevel Converters." Thesis, University of Nottingham, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.523161.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Zakaria, Khairul Parman. "The Application of Simulated Annealing for Condition Monitoring in Induction Motors." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506610.

Full text
APA, Harvard, Vancouver, ISO, and other styles
17

Leaver, Mark Edward. "High-speed drives for consumer products." Thesis, University of Newcastle Upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612619.

Full text
Abstract:
The aesthetic design and thus market appeal of consumer products is limited by the size and weight of the universal or brushed DC motors that they typically employ. As many similar products are displayed for sale side-by-side, it is the aim of any manufacturer to ensure that their product stands out from the rest either in terms of performance, features, aesthetics or ergonomics. This thesis presents the research, design, development and product deployment of two high-speed brushless machines that remove the limitations and restrictions on machine design imposed by mechanical commutation and d
APA, Harvard, Vancouver, ISO, and other styles
18

Smith, Andrew Neil. "Speed Sensorless Induction Motor Drives : A Comparison." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.506428.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Wu, Xu. "Development of high temperature PEMFC and high temperature PEMWE." Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555981.

Full text
Abstract:
Polymer electrolyte membrane fuel cells (PEMFC) and polymer electrolyte membrane water electrolysers (PEMWE) are promising electrochemical energy conversion devices. This thesis describes research carried out on high temperature PEMFC and PEMWE. High temperature (> 100 QC) operation is one of the most topical research trends of PEMFC and PEMWE, because of the operational and kinetic advantages it can provide. In this research, an anhydrous solid electrolyte, Sb-doped SnP207 was prepared and characterized. The synthesis parameters, microstructure, and conductivity of Sb-doped SnP207 were studie
APA, Harvard, Vancouver, ISO, and other styles
20

Ng, Kong. "Electromagnetic losses in brushless permanent magnet machines." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.579745.

Full text
APA, Harvard, Vancouver, ISO, and other styles
21

Abdelhamid, F. S. aleh. "Detection and Diagnosis of Electrical Faults in Induction Motors using Instantaneous Phase Variation." Thesis, University of Manchester, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.520502.

Full text
APA, Harvard, Vancouver, ISO, and other styles
22

Norton, Matthew Savvas Harry. "Investigation of a novel, building-integrated photovoltaic concentrator." Thesis, University of Reading, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.555862.

Full text
Abstract:
This thesis examines the performance of a building-integrated 10X photovoltaic concentrator proposed within the EU Framework-5 CONMAN project. The concentrator behaves as a window or skylight, allowing diffuse light to enter the building, whilst using mirrored slats to capture direct sunlight for conversion to electricity. The underlying logic is that by building integration, the proposed design can be economically and environmentally preferential to standard building-mounted PV panels in situations where the EU Energy Performance of Buildings Directive applies. A survey of building-integrated
APA, Harvard, Vancouver, ISO, and other styles
23

Salman, S. "Parameter estimation of synchronous generators on isolated systems." Thesis, University of Aberdeen, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.593388.

Full text
Abstract:
The design of electrical power systems on offshore platforms involves ensuring the safe and reliable operation of the systems. These criteria prompted the need for performing short-circuit studies and fault level calculations. Using the results obtained from these studies together with the load data, the switchgear rating and fault rating of the switchboard can be determined. This study will aid the designer in determining both transient and substransient reactances of the generators, whereby the transient reactance is used in studying the effect of starting a large motor such as a compressor
APA, Harvard, Vancouver, ISO, and other styles
24

Sayers, Laura R. "Synthesis and characterisation of M-doped titanium dioxide for the potential application in electrochemical devices." Thesis, University of Surrey, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.566823.

Full text
Abstract:
The chemistry of systems intended to produce metal-doped, nanostructured oxide materials containing titaniumffV) has been investigated. Manganese and iron were chosen as cheap, sustainable metal atom dopants with a view to possible use of product materials in electrochemical devices. In particular, the aim was to enhance electronic conductivity and to introduce psudocapacitance for investigation in supercapacitor devices. Previous literature in this area was found to be misleading; products of earlier synthetic studies have been incompletely characterised, with solid products being assumed to
APA, Harvard, Vancouver, ISO, and other styles
25

Edwards, S. "Fault diagnosis of rotating machinery." Thesis, Swansea University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.636771.

Full text
Abstract:
In this thesis, topics of importance to the fault diagnosis of rotating machinery in the power generation industry have been addressed, including a review of the relevant literature and an overview of the associated rotordynamics modelling and analysis techniques. For faults involving rotor-stator interaction it has been shown that the inclusion of torsion in mathematical models used for rotor-stator contract analyses can have a significant influence on the dynamic behaviour of the system. A 3 degrees-of-freedom model based on the Jeffcott rotor was developed and, for physically realistic syst
APA, Harvard, Vancouver, ISO, and other styles
26

Hewings, D. B. "Probabilistic modelling of load and harmonic distortion in an A.C. traction system using an object-oriented approach." Thesis, Swansea University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.637271.

Full text
Abstract:
As a means of reducing over-design and gaining greater insight into the operation of dynamic systems, probabilistic methods have evolved as a extremely important design tool. This has been true of power system design in general over the past thirty years, and probabilistic methods are now used in the design of overhead line supports, fault-clearing plant and the assessment of load demands. However, the application of probabilistic methods to the design and analysis of traction power systems has been relatively limited. These systems involve not only the electrical characteristics of the power
APA, Harvard, Vancouver, ISO, and other styles
27

Anagren, Y. N. F. "Real-time sliding mode control of a brushless DC motor." Thesis, Swansea University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.635778.

Full text
Abstract:
Conventional DC-brush motors have been used extensively as variable speed drive systems due to their linear characteristics, which result in easy speed control. However, AC drives become an attractive alternative to their DC counterparts in various industrial applications. This is due to the recent developments in both power electronics and microelectronics technology. Brushless permanent magnet motors combine the advantages of brush-DC motors and AC motors. Therefore, a tremendous effort is carried out to utilise this type of electrical drive in high performance industrial applications. A rob
APA, Harvard, Vancouver, ISO, and other styles
28

Buckley, Alison Jayne. "The attachment of corona ions to aerosol particles near high voltage powerlines." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505750.

Full text
Abstract:
Corona ions emitted from overhead AC high voltage powerlines have been investigated and their effect on atmospheric aerosol charge assessed for potential health effects evaluation. To quantify the influence of the powerlines on the environment, ground-level measurements have been made upwind and downwind of ten lines in South West England.
APA, Harvard, Vancouver, ISO, and other styles
29

Gordon, B. M. "Small induction motor drives." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599532.

Full text
Abstract:
Domestic appliances represent very cost conscious applications for drives where the emphasis is on achieving the optimum compromise between cost and performance. The requirements placed on a domestic appliance drive are so radically different from those demanded of an industrial drive, that a detailed re-evaluation of all the constituent sub-units of the drive must be undertaken. Domestic appliances are produced in large volumes so the use of a special arrangement or custom components can be justified if an overall benefit can be demonstrated. The work presented in this dissertation is concern
APA, Harvard, Vancouver, ISO, and other styles
30

Ahmed, Saeed Mohamed. "Investigations into the improvement of a single phase permanent magnet brushless DC motor." Thesis, University of Leicester, 2011. http://hdl.handle.net/2381/10114.

Full text
Abstract:
The work presented in this thesis is aimed at improving single phase permanent magnet brushless DC motors; including their operation, design, efficiency and smoothness. Three main areas were identified and researched for further improvement. As a precursor to this work, a detailed literature study related to each area is also presented. The first of these areas concentrates on the improvement of the open circuit torque for a single phase BLDC motor. The open circuit torque is not only due to the slot openings, but is also contributed by the uneven airgap which is conventionally used to solve s
APA, Harvard, Vancouver, ISO, and other styles
31

Abdelsalam, Ahmed Kadry Ahmed. "Medium-voltage PWM indirect vector controlled induction motor drive with a long motor feeder." Thesis, University of Strathclyde, 2009. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21996.

Full text
Abstract:
This thesis studies two types of medium-voltage (MV) vector controlled PWM induction motor drives for long motor feeder applications, namely voltage source and current source based drives. As rectifiers and inverters are the main elements in any drive system, both are investigated, but with more emphasis on the inverter side. MV PWM current source rectifiers (CSR) usually use selective harmonic elimination as a modulating strategy which provides good harmonic reduction at a low switching frequency. The rectifier performance does not meet the IEEE 519 regulation concerning harmonics injected in
APA, Harvard, Vancouver, ISO, and other styles
32

Evans, James Paul Owain. "Development of a 3-D x-ray system." Thesis, Nottingham Trent University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393246.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

Chen, Fang. "Sliding-mode control and observer design for high performance control of an induction machine." Thesis, Heriot-Watt University, 2002. http://hdl.handle.net/10399/397.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Masoud, Mahmoud Ibrahim. "Decoupled control of rotor torque and rotor electric power in a salient pole, synchronous machine." Thesis, Heriot-Watt University, 2003. http://hdl.handle.net/10399/389.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Jordan, Nicholas. "Protection co-ordination within the D.C. traction network." Thesis, London South Bank University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.434419.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Allan, Malcolm. "Hardware/software strategies for the DC brushless motor." Thesis, Glasgow Caledonian University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282722.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Lamine, Adoum. "Vector control of induction machines considering the stray load losses." Thesis, Liverpool John Moores University, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436561.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Gerada, Christopher. "Dynamic field models of electrical machines and their control systems applied to performance enchancement and fault tolerance." Thesis, University of Nottingham, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.417213.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Sháněl, Martin. "Investigation of rotor cooling in salient pole electrical machines." Thesis, University of Nottingham, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.412119.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

McLaren, Victoria Leah. "A study of rock salt superstructure oxide phases and their possible applications in lithium ion batteries." Thesis, University of Sheffield, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398376.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

Li, Fei. "A non-intrusive method for the determination of overhead line configuration and the derivation of system voltage waveforms." Thesis, University of Strathclyde, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435127.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Darroman, Yann. "Reducing the energy consumption of battery-powered products by the use of switched-mode techniques." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398535.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Masood, Tariq. "Improvement of voltage and power flow control in the GCC power grid by using coordinated FACTS devices." Thesis, University of Bath, 2013. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.589638.

Full text
Abstract:
This work presents HVDC/FACTS control device implementation framework in the Gulf cooperative council’s countries. It comprises of five layers of FACTS control devices (STATCOM, SSSC, UPFC, HVDC and centralized/De-centralized Control). This five-layer architecture is designed in order to configure and produce the desired results; based on these outcomes, GCC power system network control and operational problems can be identified and addressed within the control architecture on the GCC power grid. In the context of power FACTS-FRAME, this work is to identify and determine a number of power syst
APA, Harvard, Vancouver, ISO, and other styles
44

Norman, Rosemary Anne. "High-performance current regulation for voltage-source-inverter-fed induction motor drives." Thesis, University of Bradford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.514187.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Goodwin, Roy C. "Decision-support software for the design of high-frequency wound-components." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/12043.

Full text
Abstract:
The architecture and control strategies of computing environments able to provide decision-support, together with software selection, are described. In the area of engineering design, the need to provide both a knowledge base and a database, and direct communication between the two, is recognised as an essential pre-requisite to the successful development of decision-support software. The role of expert systems in developing and maintaining the knowledge base, and factors influencing the choice of expert system, are discussed. An integrated software network in which to build computer-aided des
APA, Harvard, Vancouver, ISO, and other styles
46

Price, Colin Franklin. "Investigation of a quasi-square parallel-resonant converter." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/12798.

Full text
Abstract:
A converter is proposed which is based on <i>parallel-resonant</i> technology, incorporating a capacitive filter. The convertor complies with a high-power, low voltage load specification, and is required to operate with a fixed switching frequency. The topology uses a combination of resonant tanks, and a clamped voltage technique, to maintain the advantages of more standard square-wave converters, whilst exploiting the desirable features of resonant conversion. The purpose of the proposed converter is threefold: 1. -to reduce the converter size by operating without an output filter choke; 2. -
APA, Harvard, Vancouver, ISO, and other styles
47

Nebel, Paul. "Synthesis of optimal control of a wave energy converter." Thesis, University of Edinburgh, 1994. http://hdl.handle.net/1842/12708.

Full text
Abstract:
The thesis begins by describing the experimental determination of the hydrodynamic coefficients of two test models; an Edinburgh duck and a semi-submerged, horizontal right circular cylinder. The impedance and wave force coefficient matrices are measured for these two models, and in the case of the cylinder are checked against exact analytical results. The radiation and scattering pattern matrices are also measured. Synthesis of optimal (complex-conjugate) control is achieved for the cylinder in one and two degrees-of-freedom, and for the duck in one, two and three degrees-of-freedom. Synthesi
APA, Harvard, Vancouver, ISO, and other styles
48

Clark, Joanna Helen. "Inorganic materials for energy conversion." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.569768.

Full text
Abstract:
In an effort to design systems that harvest solar light and convert this into chemical energy, the primary aim of the work presented in this thesis was to develop complex metal oxide materials that were active photocatalysts under visible light. The existing methods for visible light incorporation into photocatalytically active materials are reviewed. Of these, metal to metal charge transfer (MMCT) between bimetallic surface- grafted assemblies was taken as particular inspiration. It was hypothesised that MMCT between metal centres within a bulk complex metal oxide could be similarly applied t
APA, Harvard, Vancouver, ISO, and other styles
49

Atallah, Kais. "Iron losses in brushless permanent magnet DC machines." Thesis, University of Sheffield, 1993. http://etheses.whiterose.ac.uk/14941/.

Full text
Abstract:
A closed-loop computer-controlled single-sheet test system has been developed to characterise lamination materials and to measure, the iron loss density under any specified flux density waveform. The system has been 'used to validate predictions from a recently developed theoretical model, for the calculation of the excess loss component associated with domaiQ wall movement, under flux density waveforms typical of those encountered in the stator core of brushless permanent magnet dc motors. In addition, an improved expression for the calculation of the iron loss density component, from measure
APA, Harvard, Vancouver, ISO, and other styles
50

Watson, Stuart. "Instrumentation for low-conductivity magnetic induction tomography." Thesis, University of South Wales, 2009. https://pure.southwales.ac.uk/en/studentthesis/instrumentation-for-lowconductivity-magnetic-induction-tomography(62c6312c-5158-45e6-82bf-51b379dfa2f3).html.

Full text
Abstract:
Magnetic Induction Tomography (MIT) belongs to a group of techniques for the non­ invasive imaging of the passive electrical properties of objects which also includes Electrical Impedance Tomography (EIT). In MIT, arrays of coils are employed to induce eddy currents within an object and to detect the resulting secondary magnetic fields. Conductivity and permittivity distributions are then reconstructed from the collected set of four-terminal transimpedance data. MIT has several potential advantages relative to EIT including (i) errors due to variability of electrode contact impedances and posi
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography