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IEE Proceedings A - Science, Measurement and Technology

Issue 6 • Nov 1993

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Displaying Results 1 - 15 of 15
  • Losses in tubular cylindrical conductors due to current surges, taking skin effect into account

    Publication Year: 1993, Page(s):496 - 500
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (264 KB)

    The paper gives expressions for the losses in a tubular cylindrical conductor, under impulse surges, with the transient skin effect taken into account. Both the total losses and the losses at outer surface layer of the tubular conductor are considered. Expressions for a current surge in a form of dual-exponential impulse are presented. The formulae obtained are used for some illustrative computati... View full abstract»

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  • Charge deposition in gas filled channels with insulating walls

    Publication Year: 1993, Page(s):509 - 516
    Cited by:  Papers (13)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (705 KB)

    Solid insulation suffers from the formation of treelike structures of narrow gas filled channels originating from points of electrical stress concentration. Although the growth of these channels, and the development of the characteristic tree structures, have been the subject of many observational studies, the mechanisms involved have yet to be elucidated. A significant observation is that, in the... View full abstract»

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  • Numerical simulation for induction coil launcher using FE-BE method with hybrid potentials

    Publication Year: 1993, Page(s):501 - 508
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (510 KB)

    A hybrid scheme combining finite and boundary elements is applied to analyse the transient behaviour of a conducting coaxial rigid projectile accelerating in an electromagnetic field produced by field coils with some prescribed current inputs. The problem is assumed to be axisymmetric, and the forcing currents are circumferential. The corresponding initial/boundary value problem associated with ce... View full abstract»

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  • Readout systems for linear transducers

    Publication Year: 1993, Page(s):491 - 495
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (299 KB)

    There is much time lost in the manufacturing industries in setting up complex cutter forms on production machinery. This has a detrimental effect on machine utilisation and hence on profitability. Certain areas have been identified that could derive direct benefit from a suitable calibration or 'referencing' device to provide data to ease machine set-ups and reduce down time. Having chosen Spheros... View full abstract»

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  • DSP-based algorithm for electric power measurement

    Publication Year: 1993, Page(s):485 - 490
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (407 KB)

    The paper describes a new approach to the design of digital algorithms for electric power measurements under nonsinusoidal conditions. Using the discrete Fourier transform of two sets of real data in one pass, the voltage and current spectra are obtained, simultaneously. Real and imaginary parts of both spectra are then processed to obtain the terms of the electric power components according to va... View full abstract»

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  • Measurements on birefringent fibres: COST 217 interlaboratory measurement campaign

    Publication Year: 1993, Page(s):479 - 484
    Cited by:  Patents (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (465 KB)

    An interlaboratory comparison of measurements on three types of commercially available polarisation maintaining fibres was performed in the framework of COST 217. The obtained accuracy and reproducibility for the parameters as the mode field diameter, cutoff wavelength and chromatic dispersion was in the same range for these high birefringent fibres as for the conventional circular single mode fib... View full abstract»

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  • Spinning electric dipole model of ball lightning

    Publication Year: 1993, Page(s):474 - 478
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (395 KB)

    An analytical solution is spherical geometry of a very rapidly rotating and oscillating electric dipole model of ball lightning is presented. Total current (conduction plus displacement) is assumed to be zero everywhere, resulting in the considerable simplification of no magnetic field. The time averaged electrical force is radial, depends only on radius, and is balanced by a radial plasma pressur... View full abstract»

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  • Electrodeless lamps for lighting: a review

    Publication Year: 1993, Page(s):465 - 473
    Cited by:  Papers (36)  |  Patents (50)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (978 KB)

    Developments in semiconductor technology and changes in the standards for electromagnetic interference (EMI) have both been important in the recent exploitation of electrodeless discharges for use in lighting. There has been an active period of research on electrodeless discharges inside and outside the lighting industry and much of the basic physics and technology is now well understood. My purpo... View full abstract»

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  • Progress in high pressure sodium lamp technology

    Publication Year: 1993, Page(s):450 - 464
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1239 KB)

    This paper reviews the most important technological advances in high pressure sodium lamp technology in the past decade. The basic effects of increasing the xenon starting gas pressure on the electrical and photometric lamp characteristics are discussed. The implications for a practical high xenon pressure product are also briefly reviewed. The basis of colour improved lamps, both the AC and the p... View full abstract»

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  • Review of metal-halide discharge-lamp development 1980-1992

    Publication Year: 1993, Page(s):443 - 449
    Cited by:  Papers (27)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (743 KB)

    Of all high-intensity discharge (HID) lamps, the metal-halide lamp has attracted considerable attention and raised market expectations through its diversified product range covering a wide range of lighting applications. This has led to increasingly complex solutions to achieve the desired characteristics. Extensive studies on lamp design, iodide reactions with the fused-silica-tube wall and the e... View full abstract»

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  • Applications of electronic circuits in lighting

    Publication Year: 1993, Page(s):435 - 442
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (755 KB)

    The pursuit of high quality lighting and improved energy efficiency has resulted in an increased use of electronics to overcome lamp problems. This trend has grown dramatically over the last decade. Advances in switch mode power supply technology have made this possible. Electronic circuits are being used both in conjunction with, and as a replacement for, 50 Hz chokes to obtain improved lamp perf... View full abstract»

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  • Compact fluorescent lamps

    Publication Year: 1993, Page(s):429 - 434
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1052 KB)

    Although it had been discussed in principle over a long period, it was only after rare earth phosphors had been developed that small fluorescent lamps with high power loading and high brightness became available. In the early 1980s, a concept for reducing mercury pressure by a lamp design with a geometric 'cold spot' was introduced, thus allowing the lamp to work at its optimum efficacy. With geom... View full abstract»

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  • Applications of thin film reflecting coating technology to tungsten filament lamps

    Publication Year: 1993, Page(s):418 - 428
    Cited by:  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1127 KB)

    The development of multilayer dielectric coatings to provide a visible transmitting/infrared reflecting filter for use on incandescent lamps, particularly focusing on application to compact tungsten-halogen lamps, is reviewed. The potential benefits in lamp efficacy improvements obtained by converting some of the infrared into visible radiation has been known for some time. However, the system des... View full abstract»

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  • Parasitic arcing in EHV circuit breakers

    Publication Year: 1993, Page(s):522 - 528
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (618 KB)

    The normal operation of an EHV circuit breaker involves interrupting a fault current ( View full abstract»

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  • Shielding of field produced by lighting type current pulse through metallic cylinders

    Publication Year: 1993, Page(s):517 - 521
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (332 KB)

    The paper presents a method of estimation of field in a metallic conductor excited by lightning type current pulse for (i) when the return path is provided through a single conductor and (ii) when the return path is provided by the conductors forming the cage in which the excited conductor is enclosed. In the first case, analysis is carried out by replacing the current loop by an equivalent dipole... View full abstract»

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Aims & Scope

Published from 1991-1993, IEE Proceedings A contained significant and original contributions on science, measurement and technology, together with topics of general interest to electrical engineers. It included papers in the science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.

Full Aims & Scope