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# Electrical Engineers, Proceedings of the Institution of

## Filter Results

Displaying Results 1 - 25 of 25
• ### Techniques for the digital interfacing of t.d.m.-f.d.m. systems

Publication Year: 1976, Page(s):1285 - 1292
Cited by:  Papers (10)
| | PDF (766 KB)

The problems of digital interfacing of t.d.m.Â¿f.d.m. systems are considered. A novel method of converting t.d.m. to f.d.m. signals using digital signal processors is proposed. This method makes use of a periodically varying digital filter coupled with a fast Fourier transformer. The combination of these two devices takes advantage of the lowest possible sampling rate for the system, and thus grea... View full abstract»

• ### High-speed interactive graphical-display system

Publication Year: 1976, Page(s):1293 - 1298
| | PDF (921 KB)

The design of a graphical-display system with advanced facilities for assisting the user and minimising computational equirements is described. Pictures of good quality are produced. They require a minimum of store accesses to draw, and can be constructed and modified easily. Facilities include the association of light-pen hitsÂ¿ with display-file and data-base information, the ability to nest su... View full abstract»

• ### Multi-aperture directional coupler using dissimilar transmission lines

Publication Year: 1976, Page(s):1299 - 1301
Cited by:  Papers (3)
| | PDF (307 KB)

An analytical expression for the coupling between a rectangular waveguide and a stripline, coupled together through a number of narrow rectanglar slots, is derived. An investigation, on coupling through a long slot used as an element of a multi-aperture coupler is presented. Design for a 10 dB directional coupler using the best number of apertures is formulated. The results compare well with exper... View full abstract»

• ### Design considerations for leaky-wave antennas

Publication Year: 1976, Page(s):1302 - 1306
Cited by:  Papers (3)
| | PDF (635 KB)

General radiation and frequency-scanning characteristics of leaky-wave antennas of infinite length as well as finite length are described. Analytical expressions for gain, side-lobe level and efficiency of a finite-length leaky-wave antenna, for which the propagation constant does not vary along the length of the antenna, are derived. These expressions may be used to study the radiation characteri... View full abstract»

• ### Design of digital filters from LC ladder networks

Publication Year: 1976, Page(s):1307 - 1312
Cited by:  Papers (11)
| | PDF (540 KB)

A design procedure is given which enables digital filters to be derived directly from ladder LC filters. The erivation is based on an element-by-element transfer of the ladder components to the digital domain. The manner in which such a transfer is achieved is dependent on linear voltage-current transformations, a special case of which is that relying on scattering parameters which has already bee... View full abstract»

• ### Digital phase-splitting network design for digital f.d.m. applications

Publication Year: 1976, Page(s):1313 - 1315
Cited by:  Papers (2)
| | PDF (337 KB)

In this paper, a digital structure is designed for use as the phase-splitting filter in the AÂ¿ channel-bank f.d.m. system. Subject to the theoretical considerations given, a digital approach is proposed for the realisation of a sequence asymmetric polyphase network for f.d.m.-system applications. It is shown that the multiplier coefficients of an appropriate realisation may be suitably designed ... View full abstract»

• ### Common-earth fullwave rectifier

Publication Year: 1976
Cited by:  Papers (1)
| PDF (103 KB)
• ### Probabilistic power-flow techniques extended and applied to operational decision making

Publication Year: 1976, Page(s):1317 - 1324
Cited by:  Papers (17)
| | PDF (915 KB)

For effective control and operational decision making related to any power system, techniques are required to evaluate system insecurity risks. One such technique is to establish probabilistic load flows in the power system. The paper describes methods for extending the previously published probability and convolution techniques to powerflow studies in which the consumer demands are not totally in... View full abstract»

• ### Analysis of the losses in a turbine-generator rotor caused by unbalanced loading

Publication Year: 1976, Page(s):1325 - 1332
Cited by:  Papers (7)
| | PDF (897 KB)

Unbalanced loading of a turbine generator induces rotor currents at twice the supply frequency, with consequent heating of solid iron and other damping circuits, which limits the negative sequence capability of the machine. The paper presents a method for analysis of rotor current and loss distributions under these conditions. Methods are described for representing the slotted region, with its com... View full abstract»

• ### Discussion on 'General fault analysis using phase frame of reference' and 'Simulation of a synchronous generator connected via a delta-star transformer'

Publication Year: 1976, Page(s):1332 - 1334
| PDF (361 KB)
• ### Permeance harmonic analysis of short-stator machines

Publication Year: 1976, Page(s):1335 - 1340
Cited by:  Papers (1)
| | PDF (623 KB)

The paper presents a first attempt to use permeance and excitation harmonic techniques to analyse the performance of short-stator induction motors. The method is applied particularly to arc-stator induction machines but is also applicable to linear motors. It is hoped that the treatment will be of value in assessing some proposed techniques of gap shaping at the exit edge of such machines. The wor... View full abstract»

• ### Discussion on "Outline of a flexible, SF6 insulated e.h.v. cable"

Publication Year: 1976, Page(s):1341 - 1342
| PDF (311 KB)
• ### Discussion on 'Cable practice in electricity-board distribution networks: 132 kV and below' and 'Overhead-line practice'

Publication Year: 1976, Page(s):1343 - 1348
| PDF (1216 KB)
• ### Digital transmission-line protection in real time

Publication Year: 1976, Page(s):1349 - 1354
Cited by:  Papers (6)
| | PDF (809 KB)

A transmission-line digital impedance protection scheme using vector representation of fundamental components of voltages and currents is presented in the paper. An algorithm, its implementation and operational characteristics are described along with test results on a laboratory model for various types of faults. Results demonstrate the ability of the proposed digital-relaying scheme to detect fa... View full abstract»

• ### Active current and potential transducers

Publication Year: 1976, Page(s):1355 - 1356
| | PDF (194 KB)

This paper advocates the use of active current and potential transducers for proper utilisation of fast protective relays. The active current transducer faithfully transforms the primary current containing a slowly decaying d.c. component, thereby providing a good transient response. The active potential transducer helps in fast extinction of ferroresonance oscillations. Results oflaboratory inves... View full abstract»

• ### Real-time digital governor for a generating unit: analysis, design and test results

Publication Year: 1976, Page(s):1357 - 1359
| | PDF (419 KB)

A control scheme utilising an online minicomputer that performs in real time the complete control of a generating unit is outlined. A part of this scheme relating to the speed-control aspects is described in detail. Analytic techniques particularly appropriate for discrete systems are invoked for analysing the real time digital governor. Design and test results of two versions of the digital gover... View full abstract»

• ### Discussion on 'Control communications and protection for the El Chocon-Buenos Aires 500 kV transmission system'

Publication Year: 1976, Page(s):1359 - 1362
| PDF (719 KB)
• ### Discussion on "Review of trends in excitation systems and possible future developments"

Publication Year: 1976, Page(s):1363 - 1364
| PDF (426 KB)
• ### Behaviour of thyristors when turned on by gate current

Publication Year: 1976, Page(s):1365 - 1367
Cited by:  Papers (1)
| | PDF (363 KB)

An analysis has been made of the terminal waveforms of thyristors at turn on following the application of a gate pulse. From this, an equivalent circuit has been developed which can be used to predict the anode-cathode voltage and the anode current for any operating conditions. View full abstract»

• ### Discussion on "Maximin algorithms for interactive synthesis of electricity-supply networks"

Publication Year: 1976, Page(s):1368 - 1370
| PDF (631 KB)
• ### Analysis of high-breaking-capacity fuselink arcing phenomena

Publication Year: 1976, Page(s):1371 - 1372
| PDF (400 KB)
• ### Zero-current detection in power convertors

Publication Year: 1976
| PDF (145 KB)
• ### Model order identification using an auxiliary system

Publication Year: 1976, Page(s):1373 - 1379
| | PDF (881 KB)

This paper introduces an alternative approach to model-order testing for single-input/single-output system identification from input-output data. The essence of the technique is to adjoin a known system to the normal parameter estimation equations and assess the suitability of the model order of the unknown system through the behaviour of the estimated auxiliary system parameters. In this way the ... View full abstract»

• ### Investigation into a class of nonlinear cyclic binary sequences: generation, properties and applications

Publication Year: 1976, Page(s):1380 - 1386
| | PDF (783 KB)

The paper describes a class of nonlinear binary sequences which possess cyclic and multiple-state occurrence properties. Such sequences are null or cyclic, preceded by either a zero or finite transient phase. The sequences are realised by controlling the individual transfer between successive stages of a primaryregister by the states of a corrupting-register, which itself may be cyclic in behaviou... View full abstract»

• ### Alexander Graham Bell and the invention of the telephone

Publication Year: 1976, Page(s):1387 - 1388
| | PDF (239 KB)

The essentials of the telephone receiver were invented before Bell's work. A primitive telephone transmitter was invented by Philip Reis in 1860. Others claimed to have anticipated Bell's invention, but their claims were unsuccessful in the US law courts. The paper shows how Bell's work on the harmonic telegraph led to his first idea for a telephone, and his experiments in telephony, which resulte... 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