By Topic

Electrical Engineers, Proceedings of the Institution of

Issue 12 • Date December 1965

Filter Results

Displaying Results 1 - 25 of 31
  • Variational method for the analysis of waveguide coupling

    Publication Year: 1965, Page(s):2171 - 2179
    Cited by:  Papers (17)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (965 KB)

    A variational method is described for the analysis of electromagnetic-energy transfer through the common broad wall between two rectangular waveguides. The method is of general application, providing quantitative theoretical results for the coupling and directivity of a large variety of waveguide coupling mechanisms. The problem considered is that of two adjacent rectangular waveguides having an a... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Simple calculation of the equivalent circuit of loss-free obstacles

    Publication Year: 1965, Page(s):2180 - 2186
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (664 KB)

    The paper deals specifically with the equivalent circuits corresponding to dielectric and metallic rods of circular cross-section placed in rectangular waveguides. If such an obstacle is placed in a resonant length of waveguide, the resonant frequency is changed. Both the shunt and series elements of the equivalent T network can be calculated if the change in resonant frequency is known for two su... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Front-end back scattering of highly conducting strips illuminated by a plane wave end-on

    Publication Year: 1965, Page(s):2187 - 2191
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (519 KB)

    The scattering of a plane electromagnetic wave at the front end of rectangular highly conducting strips is studied. The method of solution applied is based on a variational formulation of the currents induced at the front end. Back-scattering cross-sections are calculated for thin strips of width up to 2¿. It is shown that the front-end back-scattering cross-section of thin conducting strips is i... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Radiation resistance of a circular current filament in a magnetoionic medium

    Publication Year: 1965, Page(s):2192 - 2198
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (830 KB)

    The radiation from a circular filament of electric current immersed in an unbounded, loss-free magnetoionic medium is considered for the case in which the axis of the loop is oriented parallel to the direction of the magnetostatic field. An integral expression for the radiation resistance of the current loop is obtained for the case of a constant current distribution around the loop. The radiation... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Vestigial-sideband transmission at u.h.f.

    Publication Year: 1965, Page(s):2199 - 2207
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (950 KB)

    625-line u.h.f. television transmissions in Europe and the United Kingdom use a vestigial-sideband channel allocation. The use of a vestigial-sideband system enables more channels to be accommodated in the u.h.f. bands, but it can result in the transmission in a given channel interfering with that in the lower adjacent channel. In the paper, the specification of the radiated spectrum of 625-line u... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synthesis of transfer functions using an operational amplifier

    Publication Year: 1965, Page(s):2208 - 2212
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (397 KB)

    Realisability theory of passive 3-terminal networks is adopted for developing a systematic synthesis procedure for a general class of transfer functions, using RC elements and an operational amplifier. A synthesis technique is evolved to realise 3-terminal networks which consist of a ¿ network in parallel with T networks. Useful theorems for such realisations are stated. A large variety of transf... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • RC active ladder networks

    Publication Year: 1965, Page(s):2213 - 2219
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (652 KB)

    A new RC active synthesis method is proposed, the active units used being negative-impedance convertors (n.i.c.s.). Any driving-point immittance, specified as a rational function with real coefficients, may be realised by an RC active ladder structure. These results can also be adapted to the realisation of arbitrary (rational) transfer functions. For specific filter functions, the ladder-network ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Parallel decomposition of 3-terminal RC networks

    Publication Year: 1965, Page(s):2220 - 2226
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (741 KB)

    The paper points out the existence of geometrical models representing the parallel decomposition of a lumped linear 3-terminal RC network whose short-circuit admittances have cubic denominators. These models lead immediately to numerical algorithms whereby the question of the various modes of additive decomposition of a given short-circuit admittance matrix can be examined using a digital computer... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Active RC filters employing a single operational amplifier to obtain biquadratic responses

    Publication Year: 1965, Page(s):2227 - 2234
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (653 KB)

    In this paper, networks are presented in tabular form to simplify the design of RC active filters having magnitude responses characterised by pass-band attenuation ripples and stop-band transmission zeros. The responses of these networks may be described by biquadratic rational functions. In all, the form and element values for 11 different networks are tabulated. The basic network discussed in th... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Synthesis of RC active filters with prescribed pole sensitivity

    Publication Year: 1965, Page(s):2235 - 2242
    Cited by:  Papers (10)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (796 KB)

    By using complex conjugate phantom zeros located in the left half of the p plane, a prescribed pole sensitivity is realised. The pole sensitivity thus achieved can be much less than that attainable by means of Horowitz's or Herbst's decomposition of the denominator polynomial of a given second-order low-pass transfer function. It is shown that two possible solutions for the co-ordinates of the pha... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Iterative procedure for analysing certain networks by digital computer

    Publication Year: 1965, Page(s):2243 - 2253
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (856 KB)

    The paper describes and illustrates a method of analysing linear electrical networks which can be viewed as a set of interconnected 4-terminal networks. The iterative nature of the method makes it very suitable for programming on a digital computer. Further, it is often very economical in computer time because one can use the results of previously analysed 4-terminal networks. The paper also outli... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Linear-phase polynomials

    Publication Year: 1965
    IEEE is not the copyright holder of this material | PDF file iconPDF (80 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Application of dynamic programming to optimisation of hydroelectric/steam power-system operation

    Publication Year: 1965, Page(s):2255 - 2260
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (671 KB)

    The paper discusses the computational aspects in the application of dynamic programming to the schedule of generation among hydroelectric and steam units in a power system for minimum operating cost. An attractive feature of this method is its ability to handle restrictions upon problem variables, such as limits upon hydroelectric plant discharge and river elevation. A computation algorithm is pre... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Generalised computer program for power-system analysis

    Publication Year: 1965, Page(s):2261 - 2274
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1224 KB)

    The paper gives details of a set of power-system analysis programs based on a common-input array and on a common-impedance-matrix form of solution. The latter has enabled all the conventional items of analysis, and also relay performance, to be integrated into one program, yielding maximum computer efficiency and minimum data handling. This is described in the first section of the paper. The next ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Thermal analysis of power cables in soils of temperature-responsive thermal resistivity

    Publication Year: 1965, Page(s):2275 - 2283
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1002 KB)

    Conventional procedures for calculating current ratings of buried cables involve the concept of an ideal soil of uniform thermal resistivity. Having regard to the fact that actual soil can, as a result of cable heat generation causing migration of ground moisture, display local increases in thermal resistivity, it is shown that rating calculations can readily be made in relation to alternative ide... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discussion on "Parallel operation of transformers with on-load tap changers and negative-reactance-compounding control"

    Publication Year: 1965, Page(s):2284 - 2288
    IEEE is not the copyright holder of this material | PDF file iconPDF (1029 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discussion on 'Excitation of large turbogenerators'

    Publication Year: 1965, Page(s):2289 - 2292
    IEEE is not the copyright holder of this material | PDF file iconPDF (670 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discussion on 'Developments in the design of large power transformers'

    Publication Year: 1965, Page(s):2292 - 2296
    IEEE is not the copyright holder of this material | PDF file iconPDF (756 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Recent developments in battery electric vehicles

    Publication Year: 1965, Page(s):2297 - 2308
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1762 KB)

    The paper reviews improvements made in the design and manufacture of battery-powered vehicles and their components during the past ten years or so. Batteries, controllers, motors, chargers and transmission systems are discussed, and a brief commentary is made on the effects of modern tyre equipment on vehicle performance. Comparisons are made in some instances with earlier designs of vehicles and ... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Discussion on 'Adjustable-frequency invertors and their application to variable-speed drives'

    Publication Year: 1965, Page(s):2309 - 2310
    IEEE is not the copyright holder of this material | PDF file iconPDF (263 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Two-speed operation of salient-pole reluctance machines

    Publication Year: 1965, Page(s):2311 - 2316
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (689 KB)

    In the paper it is shown that a reluctance-machine rotor of the conventional salient-pole type can be successfully operated, not only with a stator winding developing the same number of magnetic poles as the rotor has salient poles, but also with a winding developing twice this number. The mode of operation at the lower speed is explained in the light of a recently described machine,1 in which sal... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Origins of load losses in induction motors with cast aluminium rotors

    Publication Year: 1965, Page(s):2317 - 2332
    Cited by:  Papers (28)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1408 KB)

    The theory presented in the paper attempts to explain the origins of load losses in detail. It includes an analysis of the losses produced, at any given value of slip, by current flow through the rotor iron between two adjacent bars, owing to the imperfect insulation of the squirrel cage. The theory also includes a calculation of the eddy-current and hysteresis losses in the rotor teeth, caused by... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Use of capacitors for reduction of commutation angle in static high-power convertors

    Publication Year: 1965, Page(s):2333 - 2341
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1057 KB)

    With the usual methods of connecting static capacitors as a reactive-power source on the primary or tertiary of a convertor transformer, their latent ability to produce a rapid discharge current, which will directly assist the commutation process and so reduce commutation angle, is not utilised. By connecting the capacitors to the secondary winding (valve winding) of the convertor transformer, app... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Automatic field suppression in brushless excited turboalternators

    Publication Year: 1965, Page(s):2341 - 2342
    IEEE is not the copyright holder of this material | PDF file iconPDF (197 KB)
    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Experiments and theory on arc reignition by spark breakdown

    Publication Year: 1965, Page(s):2343 - 2352
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1313 KB)

    Since the temperature recovery of an arc column and assembly cannot be analysed rigorously, a simple lumped-components model has been developed to provide an approximate solution. In this model, the experimental assembly has been divided into three components¿arc gas, ambient gas and electrodes¿and it has been assumed that the heat transfer between any two components is proportional to the tempe... View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.

Aims & Scope

The Proceedings of the Institution of Electrical Engineers was published by the IET between 1963 and 1979.

Full Aims & Scope