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Electrical Engineers, Proceedings of the Institution of

Issue 6 • Date June 1966

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Displaying Results 1 - 25 of 30
  • Spectral-noise characteristics of glow discharges in the frequency range 1kc/s¿8Mc/s

    Publication Year: 1966, Page(s):937 - 942
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (724 KB)

    Measurements of the small-signal impedance and noise voltage have been made over the frequency range 1 kc/s to 8 Mc/s for glow-discharge tubes filled with pure neon at pressures from 10 to 60torr. The equivalent circuits of the discharge with respect to the impedance and noise are shown, and the spectral variations of noise voltage and current are explained with reference to them. The relationship... View full abstract»

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  • Design of wide-range varactor-tuned microwave tunnel-diode oscillators

    Publication Year: 1966, Page(s):943 - 947
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (592 KB)

    The paper describes the application of tunnel diodes to electronically tunable microwave oscillators. The properties of tunnel diodes are described, and oscillators with a wide tuning range are considered in detail. In order to achieve frequency stability, the tunnel diode should be weakly coupled to a relatively high-Q factor resonator, and this principle is applied to the design of electronicall... View full abstract»

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  • Application of the magnetoresistance effect in semiconductors to microwave power measurements

    Publication Year: 1966, Page(s):948 - 956
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1001 KB)

    Theoretical and experimental investigations have been made on the application of the magnetoresistance effect in semiconductors to the measurement of microwave power. Five magnetoresistance microwave wattmeters of different kinds, with InSb or InAs elements, were constructed. Various measurements were taken, at 10 or 34Gc/s, to investigate the existence of the multiplying action between the electr... View full abstract»

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  • Braid construction and attenuation of coaxial cables at microwave frequencies

    Publication Year: 1966, Page(s):957 - 962
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (720 KB)

    The attenuation performance of flexible coaxial cables in the microwave region has been measured for a number of different braid designs in order to elucidate the phenomenon of attenuation instability and to achieve a design for a cable of predictable performance. The variables investigated were braid-wire size and tension, braid angle and filling factor, type of weave, and, for the first time, go... View full abstract»

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  • Measuring methods for r.f. cables in the u.h.f. range

    Publication Year: 1966, Page(s):963 - 969
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (869 KB)

    The paper deals with methods of measurement employed to ascertain the special characteristics of r.f. cables in the frequency range 470¿960Mc/s. In the first part, general methods are described for determining the mean characteristic impedance, attenuation and power-handling capacity, and dielectric strength and screening efficiency are also discussed. The second part of the paper deals with meth... View full abstract»

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  • Cascade connection for time-invariant n-port networks

    Publication Year: 1966, Page(s):970 - 974
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (639 KB)

    Questions concerning the existence of the scattering matrix for the interconnection of two networks are considered. It is shown that all interconnections can be regarded as a special type of interconnection termed cascade loading. If two networks in the cascade-loading configuration are separately linear, passive, time-invariant and have scattering matrixes, the same is true of the interconnection... View full abstract»

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  • Synthesis of LC networks¿a state-model approach

    Publication Year: 1966, Page(s):975 - 981
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (690 KB)

    In the paper, a general procedure for realising the state model of an LC n-port network is presented. Realisation procedures of n-port LC networks are well established if the specification is given in the complex-frequency domain. The procedure presented here represents an alternative to these well established methods, and is believed to give new insight into the problem of transformerless realisa... View full abstract»

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  • Canonic LC equivalent network transformations

    Publication Year: 1966, Page(s):982 - 988
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (667 KB)

    The paper presents a procedure for generating an arbitrary n-port LC canonic network from a known canonic form. A transformation, called the parametric transformation, establishes the relationship between the element values of the two canonic networks. It is established that in certain cases these resulting matrix equations can be solved analytically to establish the canonic forms corresponding to... View full abstract»

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  • Field-store standards conversion: Conversion between television signals with different field frequencies using ultrasonic delays

    Publication Year: 1966, Page(s):989 - 996
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1123 KB)

    At the present time, standards conversion between television signals having different field frequencies is carried out by the image transfer method. This method results in a significant impairment of picture quality, and the convertors used require considerable maintenance and adjustment. In this paper, new methods of conversion are discussed which should overcome these disadvantages. The converto... View full abstract»

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  • Experimental study of the theory of optical superheterodyne reception

    Publication Year: 1966
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (775 KB)

    A theoretical expression for the power signal/noise ratio obtained with an optical superheterodyne receiver is presented, and practical departures from it are discussed. A modification to this expression, proposed by an author using photon-fluctuation theory, is considered. A detailed description is given of the experimental equipment used in the study of the theoretical predictions. A helium-neon... View full abstract»

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  • Current transformers with capacitive burdens

    Publication Year: 1966, Page(s):1005 - 1015
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1068 KB)

    Capacitors may be included in the secondary circuits of current transformers, to effect filtering or tuning or to compensate for the capacitance of equipment being protected. While, in the past, considerable attention has been given to the behaviour of current transformers feeding resistive and inductive burdens, very little has been given to the performance obtained when there are capacitors in t... View full abstract»

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  • Analysis of doubly fed slip-ring machines

    Publication Year: 1966, Page(s):1016 - 1020
    Cited by:  Papers (14)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (536 KB)

    It is shown that a broad class of machines exists whose members may be regarded as doubly fed slip-ring machines. The paper presents a simple approach to the analysis of the steady-state performance of such machines, and indicates the interrelation between a number of conventional machines and other less orthodox machines. In particular, the double-speed doubly fed machine is examined in some deta... View full abstract»

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  • Effect of excitation regulation on synchronous-machine stability

    Publication Year: 1966, Page(s):1021 - 1034
    Cited by:  Papers (9)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1313 KB)

    The paper records a detailed study of the effect of a voltage regulator on the stability of an alternator connected through a reactance to an infinite bus. The stability is analysed by means of Nyquist loci calculated for the transfer functions of alternator and regulator. The accuracy and speed of response of the system are also considered. The first part of the paper considers a simple regulator... View full abstract»

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  • Influence of transient switching currents and fluxes on the torque developed by a squirrel-cage induction motor

    Publication Year: 1966, Page(s):1035 - 1043
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (869 KB)

    Theoretical expressions for the instantaneous torque as a function of time are given in terms of the motor constants, its speed and the conditions of simultaneous stator switching. Calculated torque/time curves are shown superimposed on experimental oscillograrns. The correlation in phase, frequency of pulsation and decrement verifies the theoretical analysis, though there is a discrepancy in ampl... View full abstract»

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  • Linear induction motors for low-speed and standstill application

    Publication Year: 1966, Page(s):1044 - 1056
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1622 KB)

    Devices which are required to produce force with virtually no movement have zero power output. The effectiveness of such devices cannot therefore be assessed in terms of their efficiency or power/weight ratio. Quantities which are important in the design of force-producing machines or `actuators¿ are the force/input, force/weight and force/cost ratios and similar quantities. Reliability is also o... View full abstract»

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  • Study of symmetrical and related components through the theory of linear vector spaces

    Publication Year: 1966, Page(s):1057 - 1062
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (791 KB)

    The paper proposes a study of symmetrical and related components, based on the theory of linear vector spaces. Using the concept of equivalence, the transformation matrixes of Clarke, Kimbark, Concordia, Boyajian and Koga are shown to be column equivalent to Fortescue's symmetrical-component transformation matrix. With a constraint on power, criteria are presented for the choice of bases for volta... View full abstract»

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  • Interlocking in large electricity-supply substations¿a fundamental approach

    Publication Year: 1966, Page(s):1063 - 1074
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1430 KB)

    The paper briefly reviews the interlocking of electrical plant and switchgear in large transmission substations, and shows that grouping occurs in two categories according to the switching function; i.e. whether for access and maintenance or operational purposes. There is a brief discussion of interlocking requirements and of conventional interlock principles using both mechanical-key and electric... View full abstract»

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  • Electrically heated multistorey-building analysis

    Publication Year: 1966, Page(s):1075 - 1076
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | PDF file iconPDF (241 KB)
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  • Dynamics of the parameter-perturbation process

    Publication Year: 1966, Page(s):1077 - 1083
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (717 KB)

    It is shown how the mean-square error of a linear system varies with time following a small change in any parameter of the system. It has been assumed that the system is in the steady-state condition before the parameter perturbation is applied. The input signal to the system may be deterministic or a random process with known statistical properties. By considering the response to a step parameter... View full abstract»

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  • Sensitivity improvement using optimal design

    Publication Year: 1966, Page(s):1084 - 1086
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (344 KB)

    The central aim of this paper is to show that, under broad but physically meaningful conditions, an optimally designed linear-regulator control system is also a system in which sensitivity to plant parameter variation is reduced by the application of feedback. The theory is applicable to multiple-input multiple-output systems. The result established thus links modern control-theory concepts to a c... View full abstract»

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  • Dynamic programming and synthesis of linear optimal control systems

    Publication Year: 1966, Page(s):1087 - 1090
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (370 KB)

    The paper discusses the application of dynamic programming to the synthesis of linear optimal and suboptimal control systems in which the control-signal vector does not depend on all the state variables. The technique is applied to the synthesis of an aircraft pitch-rate control system which is optimised for a filtered step pitch-rate demand. View full abstract»

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  • Theorem on Stieltjes correlation

    Publication Year: 1966, Page(s):1091 - 1094
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (376 KB)

    A theorem on Stieltjes correlation is formulated, in which it is shown that, in theory, Stieltjes correlation techniques do not produce any distortion of the true correlation function, provided that the two inputs are stationary, ergodic and have a normal joint distribution function. The errors due to finite averaging time are discussed, and it is shown that an analytical evaluation of the signal/... View full abstract»

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  • Input-transducer errors in binary crosscorrelation experiments. Part 3

    Publication Year: 1966, Page(s):1095 - 1102
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (803 KB)

    The crosscorrelation function between the output of an electrical network excited by an imperfect form j(t) of a pseudorandom binary signal i(t) has been determined for four different forms of j(t). The object of the experiments was to simulate the action of a system input transducer, which, because of its dynamic response, is unable to follow i(t) exactly. The effects of both reversible and nonre... View full abstract»

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  • Investigation of the electrical breakdown of transformer oil in Skowronski's cup-sphere spark gap

    Publication Year: 1966, Page(s):1103 - 1105
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (325 KB)

    The cup-sphere spark gap designed by Skowronski is used to check the effects of impurities and dispersed water on the breakdown of transformer oil. Several different filters, with porosities varying from 0.05 to 2¿m, are used for filtering oil samples. Filtering through a sintered-glass filter with a porosity of 2¿m does not affect the breakdown of the oil, but some improvement in oil properties... View full abstract»

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  • New system of spark-gap electrodes for measurement of dielectric strength of insulating liquids

    Publication Year: 1966, Page(s):1106 - 1108
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (406 KB)

    A new cup-sphere system of spark-gap electrodes, based on theoretical and experimental considerations, has been developed for testing insulating oils. The proposed system enables the presence of impurities, in particular water, to be detected more sensitively than by existing systems of spark-gap electrodes. View full abstract»

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Aims & Scope

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

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