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# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 25 of 26
• ### Active RC lowpass filters for f.d.m. and p.c.m. systems

Publication Year: 1973, Page(s):945 - 953
| | PDF (1018 KB)

Various techniques of active RC realisation of lowpass filters are discussed, and two methods which are considered to have engineering relevance are investigated in detail. The design of lowpass filters suitable for use in f.d.m. and p.c.m. systems is presented. The results of tests carried out on microelectronics models of these filters show that they meet the requirements for use in practical sy... View full abstract»

• ### THISS voter-switch analysis

Publication Year: 1973, Page(s):954 - 958
Cited by:  Papers (2)
| | PDF (680 KB)

THISS is a hybrid combination of majority voting (originated by Von Neumann) and classical standby redundancy. The acronym THISS stands for t.m.r./hybrid/single/singleÂ¿, where t.m.r. is an abbreviation of triple modular redundancy, or 2-out-of-3 majority voting of three parallel channels or convertors. The last two letter of THISS describe the terminal old age of the THISS system, which employs ... View full abstract»

• ### Double-stream flow in the smooth-bore magnetron

Publication Year: 1973, Page(s):959 - 961
| | PDF (426 KB)

The smooth-bore magnetron exhibits anomalous behaviour when the magnetic field is large enough to cut-offÂ¿ the device. Although it appears certain that instabilities are responsible for this, a knowledge of the possible types of flow taking no account of instabilities is necessary for a fuller understanding. This paper studies the double-stream flow and reports complete solutions where previousl... View full abstract»

• ### Optimised slot reradiation to modify foreground reflection into an array

Publication Year: 1973, Page(s):962 - 964
| | PDF (539 KB)

The reduction of foreground reflection into a vertically polarised 1000 MHz u.h.f. low delta aerial using a half-wave resonant slot in a one-quarter-wavelength-wide conducting flange is examined. The impedance, radiation efficiency and polar-diagram characteristics of a slot in limited conducting planes are presented. Procedures to optimise a slot to complement the Yagi-type array of vertical mono... View full abstract»

• ### Eigenvalues of spherical hybrid modes in corrugated conical horns

Publication Year: 1973, Page(s):965 - 967
| | PDF (264 KB)

An iterative algorithm for computing the eigenvalues of spherical hybrid modes in corrugated conical horns with arbitrary corrugation depth is presented. The eigenvalue equation is expressed in terms of definite integrals and the eigenvalues appear as constants associated with the integrands. The Newton-Raphson iteration technique is used for evaluating the eigenvalues. Starting values needed for ... View full abstract»

• ### Radiation pattern of dielectric-loaded dipole antenna

Publication Year: 1973
| PDF (113 KB)
• ### Quasi-sine-wave fully regenerative invertor

Publication Year: 1973, Page(s):969 - 976
Cited by:  Papers (39)
| | PDF (1068 KB)

The paper shows that, if a cage induction motor is fed with a quasi-square-wave current, the motor terminal voltage is approximately sinusoidal under normal operating conditions. A simple analytical approach, based on the assumption that the motor resistances and inductances do not change with frequency, is shown to describe adequately the motor-terminal voltage. The quasi-square-wave-current supp... View full abstract»

• ### Self-commutated rectifier to improve line conditions

Publication Year: 1973, Page(s):977 - 981
Cited by:  Papers (10)
| | PDF (711 KB)

When thyristor rectifiers are used for electrical drives, reactive power is produced with fundamental and harmonic frequencies. Especially in single-phase traction lines, with their low short-circuit power, a technical solution of this problem, applicable mainly to thyristor-driven rail cars and locomotives, had to be found. In this paper, the sector-control system of a self-commutated unsymmetric... View full abstract»

• ### Pull-in criterion for reluctance motors

Publication Year: 1973, Page(s):982 - 986
Cited by:  Papers (8)
| | PDF (533 KB)

The behaviour of reluctance machines during synchronisation and attempted synchronisation is carefully examined. Critical modes of synchronisation are identified, and, based on these, a pull-in criterion is developed. This enables the possible combinations of inertia and load torque that any given motor can synchronise to be simply and reliably predicted. Evaluation of the criterion can be carried... View full abstract»

• ### Analysis of high-rupturing-capacity fuselink prearcing phenomena by a finite-difference method

Publication Year: 1973, Page(s):987 - 993
Cited by:  Papers (3)
| | PDF (915 KB)

The complex nature of heat flow within a modern current-limiting fuselink precludes direct analysis using classical techniques. This paper describes a method which has been developed for determining the prearcing and steady-state behaviour of such devices. It uses a finite difference technique and is numerical, the calculations being performed by a digital computer. Examples of current and tempera... View full abstract»

• ### Transient recovery voltage and thermal performance of an airblast circuit breaker

Publication Year: 1973
Cited by:  Papers (4)
| | PDF (834 KB)

This paper examines the way in which the current-interrupting ability of a gas-blast circuit breaker is influenced by the initial transient recovery voltage (t.r.v.). Theoretical relationships are explored between t.r.v. waveshape, circuit-breaker are parameters and performance. Limitations which may result from the presence of high-frequency oscillations of the recovery voltage in the first few m... View full abstract»

• ### Prediction of the parameters of an impulse generator for transformer testing

Publication Year: 1973, Page(s):1001 - 1005
| | PDF (515 KB)

Simple expressions have been developed by which it is possible to predict the parameters of an impulse generator required to produce the standard lightning-impulse waveshape for the testing of transformers. The formulas also help to determine the limiting testing capability of a given generator. A simple method of extending the testing capability of a given resistance-front-control generator is al... View full abstract»

• ### Interactive design of electricity-distribution networks

Publication Year: 1973, Page(s):1006 - 1011
| | PDF (1242 KB)

This paper describes a computer-display method for interactive design of electricity-distribution networks. The display facility consists of a hardware character generator and storage tube, linked to an 8 K IBM 1130 computer. Thus the designer has an up-to-date network diagram to help him decide on the most suitable reinforcement plan. The designer can also call for information, such as substation... View full abstract»

• ### Discussion on "Measurement of inductance coefficients of saturated synchronous machines"

Publication Year: 1973, Page(s):1012 - 1013
| PDF (306 KB)
• ### Polyphase distance relay

Publication Year: 1973, Page(s):1013 - 1015
Cited by:  Papers (1)
| PDF (411 KB)
• ### Matrix method for the steady-state analysis of invertor-fed induction motors

Publication Year: 1973, Page(s):1015 - 1016
| PDF (294 KB)
• ### Neville's tooth-ripple wavelength spectra

Publication Year: 1973
| PDF (156 KB)
• ### Laser Doppler instrument for measurement of vibration of moving turbine blades

Publication Year: 1973, Page(s):1017 - 1023
| | PDF (963 KB)

A laser Doppler instrument using a 1 mW laser has been developed for the measurement of the vibration of moving objects. Particular interest has been taken in rotating turbine blades. The design and optimisation of the instrument are described, and details given of its performance and resolution. It is shown that resolution is limited by signal/noise ratio and by Doppler broadening, both of which ... View full abstract»

• ### Signal/noise ratio in laser Doppler systems

Publication Year: 1973, Page(s):1024 - 1029
| | PDF (528 KB)

A comprehensive analysis is presented of the signal/noise ratio of laser Doppler systems. Three parameters have been introduced:an easily measurable generalised system parameter is used to account for the noise performance of the system. The signal is determined by the coherent-reflectivity loss factor of the target, and the overall signal/noise ratio is specified by a noise figure. As defined, th... View full abstract»

• ### Impulse analysis of subharmonic oscillations in control systems with thyristor convertors

Publication Year: 1973, Page(s):1030 - 1037
| | PDF (995 KB)

First Page of the Article
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• ### Single-loop describing functions in multivariable-systems design

Publication Year: 1973, Page(s):1037 - 1038
| PDF (235 KB)
• ### Application of dynamic optimisation to synchronous-generator excitation controllers

Publication Year: 1973
| PDF (132 KB)
• ### Numerical analysis of the electromagnetic flowmeter

Publication Year: 1973, Page(s):1039 - 1043
| | PDF (497 KB)

The paper exploits the numerical solution of the flowmeter equation as an alternative to Bevir's analytical method. The behaviour of flowmeters with point electrodes having short magnetic-field and insulating-liner lengths may be analysed for nonaxisymmetric rectlinear flow profiles. The numerical method can be more easily extended to situations which are complicated by flow profile, fluid propert... View full abstract»

• ### New method for determining the electron swarm parameters in attaching gases

Publication Year: 1973, Page(s):1044 - 1047
| | PDF (447 KB)

This method requires the generation of electrons from a point source at a cathode and the measurement of both the amplification and radial distribution of the electrons arriving at an anode, after drifting and diffusing through the gas in a uniform electric field. At each value of E/p0 (ratio of electric field to gas pressure) the experimental results are summarised on two curves expressed as a fu... View full abstract»

• ### Boundary compensation in the mapping of Laplace fields using a computer

Publication Year: 1973, Page(s):1048 - 1054
| | PDF (649 KB)

The paper describes the application of the concept of the matching field to compensate for the finite boundary in the mapping of Laplacian-type fields. The idea has been adopted for the solution of problems using a computer, and the procedure is very convenient in 2-dimensional and axially rotational 3-dimensional cases. Examples are given and some further interesting developments are suggested. View full abstract»

## Aims & Scope

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

Full Aims & Scope