Showing papers in "International Journal of Electrical Engineering Education in 1983"
TL;DR: The algebra of complex vectors, often applied in the analysis of time-harmonic electromagnetic fields in an incomplete manner, is introduced in a systematic way, applicable in graduate or postgraduate teaching.
Abstract: The algebra of complex vectors, often applied in the analysis of time-harmonic electromagnetic fields in an incomplete manner, is introduced in a systematic way, applicable in graduate or postgraduate teaching The examples chosen to elucidate the notation are from the field of antennas and wave propagation
13 citations
TL;DR: In this article, the authors present a survey of the state-of-the-art work in the field of electrotechnical engineering, focusing on the following topics: electrical engineering, computer science, and software engineering.
Abstract: Bi/dung und Wissenschaft, Inter Nationes, Nos. 7/8,9/10 and 11/12, 1982;Kennedyallee, 91-103, D-53 Bonn-Bad Godesburg, West Germany. Elektrotechniski Vestnik, Nos. 1,2 and 3, 1982;Electrotechnical Review: YU-61OO1 Ljubljana, P.O. Box 92-11, Yugoslavia. Engineering: Cornell Quarterly, Vol. 17, No. 2, 1982. Engineering Education: Oct., Nov., 1982;American Society for Engineering Education, 1 Dupont Circle, Washington D.C. 20036.
11 citations
TL;DR: In this article, the types of static inverters used for induction heating and melting are described and categorised in a manner suitable for the incorporation of the material into engineering courses of all kinds.
Abstract: Types of static inverters used for induction heating and melting are described and categorised in a manner suitable for the incorporation of the material into engineering courses of all kinds.
6 citations
TL;DR: In this paper, the authors present a book on multivariable system theory and design for postgraduate students with a focus on pole assignment, frequency domain, design techniques and robust servomechanism problem.
Abstract: Multivariable System Theory and Design: RAJNIKANT V. PATEL and NEIL MUNRO (Pergamon Press, 1982, 374 pp., £19.50 hardback, £9.50 paperback) There are some books whose presentation and content one immediately takes a liking to, and this book falls into that category. The book seems very appropriate for use by M.Sc. and Ph.D. students and it is also very up-to-date. I particularly liked the chapters on poles and zeros of multivariable systems, pole assignment, frequency domain, design techniques and the robust servomechanism problem. It is also nice to see the method of inequalities due to Zakian included in a student text (for the first time, I believe).The book contains an extensive list of references which should be helpful to research students. The subject is very mathematical but the treatment does not rely on advanced mathematics. The book should be of value to control engineers working in industry, but it does not address itself to the practical aspects of engineering problems. However, the description of the INA design technique which was developed at UMIST and is readily available on CAD computer packages will be valuable to engineers. The characteristic locus frequency domain design method (developed at Cambridge) which has also found wide application is described and examples given. It is a credit to the authors that most of the modern multi variable design techniques are considered and not only those that they have developed. I would have preferred more material on optimal control and a chapter on Kalman filtering but there is, of course, a limit on the size of such a text. In all, the book is well balanced and should be high on the list of recommended texts for postgraduate students. M. J. GRIMBLE, Professor ofElectrical Engineering. University ofStrathclyde. Glasgow
6 citations
5 citations
TL;DR: In this article, a laboratory-scale static inverter has been constructed to demonstrate fundamental concepts in electrical instrumentation, circuit theory, and power electronics, but the unit can also illustrate induction heating and melting which are established industrial processes often neglected in engineering courses.
Abstract: A laboratory-scale static inverter has been constructed and design details given. Experiments have been developed to demonstrate fundamental concepts in electrical instrumentation, circuit theory, and power electronics, but the unit can also illustrate induction heating and melting which are established industrial processes often neglected in engineering courses.
3 citations
TL;DR: This paper derives an appropriate algorithm and presents a FORTRAN realisation, easily grafted to an existing program, derived from the explicit self and mutual inductances in the network.
Abstract: Incorporation of general mutual inductance in a purely nodal (admittance) analysis program is facilitated if an uncoupled equivalent inductor array is first generated from the explicit self and mutual inductances in the network. This paper derives an appropriate algorithm and presents a FORTRAN realisation, easily grafted to an existing program.
3 citations
TL;DR: In this article, two versions of a programmable operational amplifier for undergraduate laboratory use are presented, using an appropriate combination of switches and impedances, amplification, integration and differentiation are effected by the same operational amplifier.
Abstract: This paper presents two versions of a programmable operational amplifier for undergraduate laboratory use. Using an appropriate combination of switches and impedances, amplification, integration and differentiation are effected by the same operational amplifier. In one version, logical circuitry is used for switching reed relays. Various experimental procedures are suggested.
3 citations
TL;DR: A series of 15 laboratory tests related to electric heating processes suitable for courses in electric heating and utilisation, or for incorporation in courses on related topics at technician up to postgraduate level is presented in this paper.
Abstract: A series of 15 laboratory tests related to electric heating processes suitable for courses in electric heating and utilisation, or for incorporation in courses on related topics at technician up to postgraduate level. Details of equipment including constructional details where applicable, are given together with the relevant theory.
3 citations
TL;DR: LINSIM is a package which has been used by students and engineers at the University of Canterbury, New Zealand, for the past three years, and its structure and use are described and illustrated.
Abstract: On-line computer-aided-design programs must be versatile, easy to use, reliable, and virtually ‘crash-proof. LINSIM is such a package which has been used by students and engineers at the University of Canterbury, New Zealand, for the past three years. Its structure and use are described and illustrated.
2 citations
TL;DR: A graphics preprocessor and associated algorithm is described whereby a picture presentation by the designer is converted to analysis information by the input graphics program of SPLAP — Sunderland Polytechnic Linear Analysis Program.
Abstract: The need for care in designing input graphics programs (preprocessors) for Computer-Aided Circuit Design packages is discussed. A graphics preprocessor and associated algorithm is described whereby a picture presentation by the designer is converted to analysis information by the input graphics program of SPLAP — Sunderland Polytechnic Linear Analysis Program.
TL;DR: This article found that the wrong choice of questions is made on up to about 35% of occasions and that subsequent mark deficiency could be as high as 4.2 marks on some occasions.
Abstract: Over 750 scripts were analysed to see how the order in which students answered questions could affect their mark. It is suggested that the wrong choice of questions is made on up to about 35% of occasions and that subsequent mark deficiency could be as high as 4.2 marks.
TL;DR: In this paper, a general description of the inherent transistor limitations affecting the linearity of its performance in its typical amplifying region is presented, and a unified treatment, for bipolar junction transistors and for different types of field effect transistors, has been developed relating the Q-point location of an amplifier stage with the output amplitude and the nonlinear distortion.
Abstract: This paper presents a general description of the inherent transistor limitations affecting the linearity of its performance in its typical amplifying region. A unified treatment, for bipolar junction transistors and for the different types of field effect transistors, has been developed relating the Q-point location of an amplifier stage with the output amplitude and the nonlinear distortion.
TL;DR: The Handbook of Antenna Design as discussed by the authors is an excellent reference for anyone interested in the design of aerial antenna components and its application in the field of aerial metrology, including antenna design.
Abstract: The Handbook of Antenna Design. Volume 1:ed. A. W.RUDGE, K. MILNE, A. D. OLVER and P.KNIGHT (Peter Peregrinus, 1982,695 pp., £42 U.K., £54 elsewhere) This is a book of great value to practising design engineers and postgraduate students studying aerial theory. The 'entry requirements' are a working knowledge of aerial technology and electromagnetic theory. Volume I consists of eight chapters, the first of which reviews basic properties of aerials. This is followed by chapters detailing quasi-optical aerial theory (highly mathematical) and quasi-optical aerial design theory and applications, showing their suitability to computer-aided design techniques with consequent major design improvements. This section extends beyond the normal realm of optical principles including, for example, spherical wave theory, aperture blocking, frequency selective surfaces, contoured beams, and low noise aerials. Primary feed and hybrid aerial design sections follow, the latter describing fully electronically scanned arrays combined with radiating apertures, necessary because of the highly expensive phased array. This leads into multiple beam aerials, whose composition and performance characteristics are described in full. A large section is devoted to low and medium-gain microwave aerials which have numerous applications, of which serving as a primary feed is only one. This chapter provides design data for a range of radiators including helices and spirals, slots, microstrip aerials, backfire aerials, dielectric rods and horns. The final chapter entitled Aerial Measurements describes how the advances in performance of modern aerials has been matched by improved electrical measurement techniques, and details the more important advances in aerial metrology in the last decade. It includes impedance and current distribution measurements, near-field and far-field techniques for directivity, gain, phase and scattering measurements. Twenty eight well-known experts in the field have contributed to this excellent, well organised and professionally presented 695 page volume. The work involved spanned seven years, describing hitherto uncharted design data. It covers ideas and designs emerging mainly during the last twenty years, and highlights new technologies such as space and satellite communications, and discusses how solid state devices have stimulated new requirements and new possibilities in communications. The second volume, necessary to cover the area defined for the book specification, will include a chapter on radome design, and the last few chapters will concentrate on the design of aerials and coaxial components in the LF to UHF range; design data for these bands being generally poorly documented prior to this volume. An initial drawback to Volume I may be the price of £42. However, this is a work of extremely high calibre for aerial design specialists, and will doubtless prove to be a very valuable possession. H. GREEN, Department ofElectrical and Electronic Engineering. Manchester Polytechnic
TL;DR: In this paper, Gray et al. present a supplementary text for second-year undergraduate studies with mathematical simplicity and strong practical content aimed at the student technician although it could prove a valuable supplementary text.
Abstract: without proper guidance, the student reader may fail to grasp the underlying unity of the various concepts and techniques involved. With its mathematical simplicity and strong practical content the text is clearly aimed at the student technician although it could prove a valuable supplementary text for second-year undergraduate studies. In general, the approach adopted by the authors is to be applauded but oversimplification can result occasionally in a superficial treatment of important matters and this could have been avoided at little cost in the completion of the material. J. O. GRAY, Professor ofElectrical Engineering, University ofSalford
TL;DR: In this paper, Heathon describes fiber optics components and systems in practical terms, so that no prior knowledge is required to follow the text, and the coverage is limited to the use of fiber optics in the field of communication engineering.
Abstract: Fiber Optics: EDWARD A. LACY (Prentice Hall, 1982,222 pp., £16.95) This book is aimed at the average electronics technician and the author describes components and systems in practical terms, so that no prior knowledge is required to follow the text. The coverage is limited to the use of fiber optics in the field of communication engineering. However, within this field, the information is well written and supported by excellent figure and tables. The treatment of light sources, optical fibres, couplers, light detectors and typical systems which represent some 70% of the book will be most valuable to undergraduates who wish to obtain a thorough understanding of the subject. A. G. HEATON, Department ofElectrical Engineering and Electronics, UMIST
TL;DR: A historical review of synchronous machine modelling is categorized by classical theory, generalised theory, circuit representation, phasor diagram representation, flux linkage form and the operational network form.
Abstract: A historical review of synchronous machine modelling is categorized by the (i) classical theory; (ii) generalised theory; (iii) circuit representation; (iv) phasor diagram representation; (v) flux linkage form and the (vi) operational network form. Perspective is given in relation to the wide application of modelling.
TL;DR: In this article, a unified approach is presented in the derivation of equations for the constant-voltage capacitance transient and constant-capacitance voltage transient in deep-level transient spectroscopy (DLTS), and for the relationship between them.
Abstract: A unified approach is presented in the derivation of equations for the constant-voltage capacitance transient and constant-capacitance voltage transient in deep-level transient spectroscopy (DLTS), and for the relationship between them. The validity of these equations is independent of the device and nature of deep traps.
TL;DR: A microprocessor-based digital control laboratory course has been developed at the Autonomous University of Barcelona and the microprocessor acts as a controller in a closed loop system.
Abstract: A microprocessor-based digital control laboratory course has been developed at the Autonomous University of Barcelona. The microprocessor acts as a controller in a closed loop system. The plant has been simulated on an analog computer. Some experiments have been realized with the aim of improving the student's understanding of the digital control concepts.
TL;DR: Using the properties of the imaginary part of a minimum susceptance function, an expression for determining the driving-point immittance from a given real part is derived.
Abstract: The imaginary part of a minimum susceptance function has similar number of terms as the poles, and at all poles si, the real and the imaginary parts are equal. Using these properties, an expression...
TL;DR: The technology required to manufacture LSI circuits forms the subject of chapter five, and the various processes such as lithography, etching, oxidation and so on are dealt with in some detail, although mathematical analysis has necessarily been avoided.
Abstract: The technology required to manufacture LSI circuits forms the subject of chapter five. Here the various processes such as lithography, etching, oxidation and so on are dealt with in some detail, although mathematical analysis has necessarily been avoided in such a short account. It is significant to note that ion implantation is now described as the primary means of introducing dopant materials into the silicon substrate, replacing the more traditional process of solid-state diffusion. This certainly reflects the current trend in the microelectronics industry towards total low-temperature processing, although some consideration could still have been given to diffusion if only as an undesirable side-effect! For the up-to-date quality ofits coverage, however, this chapter has much to recommend it the sections on advanced lithographic techniques such as electron beam and X-ray are certainly worthy of mention. There follows in chapter six an excellent account of memory design and technology which examines, in considerable detail, the organisation of memory devices, their circuitry and cell structures, and the design and structure of peripheral circuitry such as address decoders and sense amplifiers. The bulk ofthe treatment is concerned with MOS random access (read/write) memories, and several examples of commercially-available static and dynamic RAM chips provide the basis for much of the discussion. The final chapter entitled 'Custom large scale integration' does not appear to add very much to the scope of the book, recovering as it does some of the ground already dealt with in earlier chapters. It should be pointed out that virtually all the circuit analysis and circuit design examples presented in this book are based on MOS technology. Furthermore, the emphasis throughout is on digital techniques. The absence of any discussions of bipolar circuitry is a regrettable shortcoming and similarly the coverage of analogue techniques is rather meagre with barely three pages out of over 300 being devoted to this topic. While this no doubt reflects the particular areas of expertise of the contributors it could be argued that the resulting text suffers slightly from a lack of balance. The increasing importance of LSI technology means that more and more courses on this subject will inevitably appear in the Electrical Engineering and Electronics curriculum, both at undergraduate and postgraduate level. This book will certainly be of value to those studying on such courses, as well as to researchers and practising engineers who wish to acquaint themselves with this new and exciting subject. P. J. HICKS, Department ofElectrical Engineering and Electronics. UMIST.
TL;DR: Instead of the use of Fourier series analysis, transient and steady-state processes in the circuits with choppers and inverters have been presented by means of geometrical progressions.
Abstract: Instead of the use of Fourier series analysis, transient and steady-state processes in the circuits with choppers and inverters have been presented by means of geometrical progressions. Therefore, the solutions for the instantaneous, transient and steady-state currents developed for the analysis of such circuits are explicit and exact.
TL;DR: In this paper, a simple and accurate method, using a search coil and a calibrated fluxmeter, is presented for experimental determination of residual flux of permament magnets of simple geometries.
Abstract: S-ENGLISH, FRENCH, GERMAN, SPANISH Measurement of residual flux in permanent magnets A simple and accurate method, using a search coil and a calibrated fluxmeter, is presented for experimental determination of residual flux of permament magnets of simple geometries. Applied to a small rectangular AlNiCo-VI magnet used variously, the method shows the importance of preventing accidental, or otherwise, demagnetisation of permanent magnets. Mesure du flux remanent dans des aimants permanents Une methode simple et precise, utilisant une bobine d'essai et un fluxmetre calibre, est presentee dans cet article pour permettre une determination experirnentale du flux remanent d'airnants permanents de geometries simples. Appliquee 11 un petit aimant rectangulaire en AlNiCo-VI utilise de diverses facons, la methode montre I'importance d'eviter des demagnetisations, accidentelles ou non, d'aimants permanents. Messung des remanenten Flusses von Dauermagneten Vorgelegt wird eine einfache und genaue Methode zur experimentellen Bestimmung des remanenten Flusses von Dauermagneten einfacher Gestalt; eine Suchspule und ein kalibrierter Flussmesser werden benutzt. Bei Anwendung auf einen kleinen, verschiedentlich verwendeten rechteckigen AlNiCo-VI-Magnet zeigt die Methode, wie wichtig es ist, zufiillige,und absichtliche, Entmagnetisierung von Dauermagneten zu vermeiden. Medida del flujo residual en imaues permanentes Se presenta un metodo sencillo y preciso para la determinacion experimental del flujo residual de imanes permanentes de geometria simple, que utiliza una bobina de prueba y un fluxornetro calibrado. AI aplicarse de modos diversos a un pequefio irnan rectangular de AlNiCo-VI, el metodo muestra la importancia de prevenir la desmagnetizacion de los imanes permanentes por causas acciden tales 0 diversas.
TL;DR: It is shown that CONTROL BASIC II minimises the effort required to write real-time control programs and thus emphasises the practical and theoretical aspects of sampled-data systems.
Abstract: A considerable understanding of the nature of sampled-data systems may be gained through experimental exercises. It is shown that CONTROL BASIC II minimises the effort required to write real-time control programs and thus emphasises the practical and theoretical aspects of sampled-data systems. Three experiments of varying difficulty are described.
TL;DR: In this article, an instrument is described which has been used in an undergraduate laboratory to illustrate the basic characteristics of step motors and the instrument is microprocessor based thus providing flexibility and ease of adaptation to the needs of various users.
Abstract: An instrument is described which has been used in an undergraduate laboratory to illustrate the basic characteristics of step motors. The instrument is microprocessor based thus providing flexibility and ease of adaptation to the needs of various users. Some typical results from the measurement system are presented.
TL;DR: In this article, an apparatus used in undergraduate instrumentation teaching is described, where a small wind tunnel creates air speeds up to 12 m/s and a Pitot tube is used as a reference against which a hot wire anemometer is compared.
Abstract: An apparatus used in undergraduate instrumentation teaching is described. A small wind tunnel creates air speeds up to 12 m/s. A Pitot tube is used as a reference against which a hot wire anemometer is compared for linearity and transient response. The experiment serves to introduce non-ideal systems.
TL;DR: In this article, a simple and accurate method, using a search coil and a calibrated fluxmeter, is presented for experimental determination of residual flux of permament magnets of simple geometries.
Abstract: A simple and accurate method, using a search coil and a calibrated fluxmeter, is presented for experimental determination of residual flux of permament magnets of simple geometries. Applied to a small rectangular AlNiCo-VI magnet used variously, the method shows the importance of preventing accidental, or otherwise, demagnetisation of permanent magnets.
TL;DR: In this paper, the critical energy model is used to calculate the corona onset voltage in co-axial cable filled with SF6 and the calculated values are then compared with the measured corona voltages.
Abstract: The critical energy model is used to calculate the corona onset voltage in co-axial cable filled with SF6. The calculated values are then compared with the measured corona onset voltages. The paper reports a good agreement between the measured and the calculated corona onset voltages for different co-axial cable dimensions.
TL;DR: The Department of Electrical and Electronic Engineering at Coventry (Lanchester) Polytechnic has been teaching computer-aided circuit design as a final-year Honours option for four years and the subject has been well received.
Abstract: The Department of Electrical and Electronic Engineering at Coventry (Lanchester) Polytechnic has been teaching computer-aided circuit design as a final-year Honours option for four years. The subject has been well received and forms an important part of the degree course. This paper describes the course and the background to its introduction.
TL;DR: In this paper, the resonance splitting associated with a ferrite loaded cavity subjected to a magnetic field is described, and a demonstration of resonance splitting with a magnetized ferrite cavity is presented.
Abstract: A demonstration showing the resonance splitting associated with a ferrite loaded cavity subjected to a magnetic field is described.