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# Electrical Engineers, Proceedings of the Institution of

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Displaying Results 1 - 25 of 26
• ### Opinion-rating model applied to television-transmission-system studies

Publication Year: 1975, Page(s):769 - 774
Cited by:  Papers (1)
| | PDF (1014 KB)

The means by which a recently described opinion-rating model may be applied to the performance of television transmission systems are outlined. The starting point is the statistical description of the objective magnitude of each distinct type of impairment arising in the system. For each type, the relationship between objective magnitude and picture quality must be known or estimated. Three distin... View full abstract»

• ### Tracking-mode synchronisation for a switching satellite

Publication Year: 1975, Page(s):775 - 779
| | PDF (534 KB)

Synchronisation of earth stations to a switching satellite in the tracking mode is examined in detail. After completion of the fine-search mode, a timing error may exist due to satellite motion, which can be large compared to noise in the system. To overcome this source of error, a tracking-mode network is included in the timing-circuit configuration. By applying a small correction voltage to the ... View full abstract»

• ### Experimental switched-diversity system for v.h.f. a.m. mobile radio

Publication Year: 1975, Page(s):780 - 784
Cited by:  Papers (1)
| | PDF (654 KB)

Switched diversity can provide a useful alternative to the well known combining methods in conditions where the noise on the various diversity branches is partially correlated. Because of its inherent simplicity it is attractive for mobile-radio use, and an experimental system has been constructed in the form of an add-onÂ¿ unit for a standard mobile receiver. Field trials have shown that the sys... View full abstract»

• ### Null-protocol network for communication between digital devices

Publication Year: 1975, Page(s):785 - 790
| | PDF (842 KB)

The paper proposes a network for sharing peripheral resources between a number of small computers in such a way that there is no protocol apparent to the users. This approach is taken because of the great costs involved in other wise necessary software changes. The implications in the design philosophy of such a network are examined and the problems are discussed for a network of this type current... View full abstract»

• ### Sparse-matrix algorithm for transient analysis of nonlinear electrical networks

Publication Year: 1975, Page(s):791 - 794
| | PDF (624 KB)

A sparse-matrix algorithm appropriate to nodal admittance formulation of transient analysis of electrical network is described. The algorithm depends for its efficiency on the splitting of the coefficient matrix into two partitions. These partitions are decomposed sequentially as the LU factorisation of the matrix proceeds. In the decomposition of the first partition, adequate roundoff-error contr... View full abstract»

• ### Input admittance of a circular waveguide aperture loaded with an iris

Publication Year: 1975, Page(s):795 - 799
| | PDF (638 KB)

An expression for the input admittance of a circular aperture in an infinite groundplane, excited by a circular waveguide having diameter different from that of the aperture, is derived by using the principle of conservation of the flux of reaction. Assuming a TE11 mode field variation at the aperture, contributions of the TE and TM plane-wave components to the complex radiated power, and hence to... View full abstract»

• ### Multiconductor transmission lines

Publication Year: 1975, Page(s):799 - 800
| PDF (225 KB)
• ### Solution of load-flow problems in power systems by ϵ-coupling method

Publication Year: 1975, Page(s):801 - 805
Cited by:  Papers (1)
| | PDF (599 KB)

The ϵ-coupling method has been applied to the solution of the load-flow problem in power systems in connection with the weak coupling between the subsystems for active and reactive power flows. The load-flow algorithm, based on this method, confirms the theoretical expectation of being considerably more efficient than the Newton-Raphson algorithm, as far as computing time and memory requir... View full abstract»

• ### Field-oriented approach to turboalternator modelling. Dynamic description and frequency responses

Publication Year: 1975, Page(s):806 - 812
| | PDF (1022 KB)

A linear model of a turbogenerator is proposed, suitable both for furnishing an accurate description of external performance, and for matching the physical processes of the actual machine. The effects of eddy currents flowing inside the solid conducting materials are brought out particularly clearly by developing an exact analytical investigation of the electromagnetic-field configuration inside t... View full abstract»

• ### Performance of dual-excitation synchronous generator at leading power factors

Publication Year: 1975, Page(s):813 - 818
Cited by:  Papers (2)
| | PDF (801 KB)

This paper presents experimental results from a laboratory microalternator system, illustrating the performance of a dual-excitation synchronous generator at extreme leading-power factors under fault conditions, and showing that it is significantly better than that of a conventional generator. The performance of a dual-excitation generator with a terminal-rotor-angle regulator is compared with tha... View full abstract»

• ### Electromagnetic damping in stepping motors

Publication Year: 1975, Page(s):819 - 824
Cited by:  Papers (8)
| | PDF (926 KB)

The mechanism of electromagnetic damping in stepping motors is investigated, and it is shown that the damping depends on three parameters of the motor/drive circuit. The observed differences in damping between the widely used single-phase and 2-phase excitation schemes are shown to arise from the different equilibrium conditions, and the much greater damping with 2-phase operation is fully explain... View full abstract»

• ### Discussion on "Stability of reluctance machines" and "Steady-state stability criterion for induction motors"

Publication Year: 1975, Page(s):824 - 826
| PDF (526 KB)
• ### Discussion on "Protective-equipment analysis using a digital computer" and "Analysis of circuits containing components with cores of ferromagnetic material"

Publication Year: 1975, Page(s):826 - 828
| PDF (601 KB)
• ### Class 74 electrodiesel locomotives of British Rail Southern Region, with particular reference to the control system

Publication Year: 1975, Page(s):829 - 836
| | PDF (1328 KB)

The paper traces the reasons for, and the development of, the booster-type locomotives used on the Southern Region of British Railways. The latest locomotives of this type, introduced in 1967 on the electrification of the Waterloo-Bournemouth line, are described with particular reference to the multiple unit or push-pullÂ¿ train-control system, and the application of solid-state equipment to the ... View full abstract»

• ### Discussion on "Transient voltages generated by inductive switching in control circuits"

Publication Year: 1975, Page(s):836 - 838
| PDF (568 KB)
• ### Theory of power-frequency proximity effect for strip conductors

Publication Year: 1975, Page(s):839 - 842
Cited by:  Papers (4)
| | PDF (539 KB)

An approximate, but conceptually simple, computer-oriented method for analysis of proximity effect for two parallel arbitrarily positioned thin-strip conductors, with low-frequency sinusoidal currents, is presented. The two simultaneous integral equations for current densities are solved approximately by the point-matching method with power-series trial functions. View full abstract»

• ### Discussion on 'Effects of mechanical and aerodynamical damping on the galloping of overhead lines' and 'Damping of aeolian vibration on overhead lines by vibration dampers'

Publication Year: 1975, Page(s):842 - 845
| PDF (690 KB)
• ### Discussion on 'Containing the cost of undergrounding'

Publication Year: 1975, Page(s):845 - 846
| PDF (367 KB)
• ### Problems associated with on-site discharge testing of delta-connected transformer windings

Publication Year: 1975, Page(s):846 - 847
| PDF (289 KB)
• ### Forced oscillations in induction motors driving pulsating loads

Publication Year: 1975, Page(s):847 - 848
Cited by:  Papers (1)
| PDF (233 KB)
• ### Erratum: Control of power on a large diesel-electric locomotive of new design

Publication Year: 1975
| PDF (107 KB)
• ### Erratum: Transient voltages generated by inductive switching in control circuits

Publication Year: 1975
| PDF (107 KB)
• ### Identification of an electric-arc furnace electrode-control system

Publication Year: 1975, Page(s):849 - 856
| | PDF (1061 KB)

The dynamic performance of a 135 tonne 35MVA 3-phase electric-arc furnace with a WardÂ¿Leonard drive is investigated. The design of experiments and collection of data from a production furnace are discussed, and the arc-discharge coefficient and a nonlinear representation of the arc impedance are identified. A difference equation representation of the arc-furnace electrode-position controller is a... View full abstract»

• ### Optimised statistical models: a new means for stochastic process estimation

Publication Year: 1975, Page(s):856 - 857
| PDF (253 KB)
• ### Feedback transformation of linear sequential machines

Publication Year: 1975, Page(s):857 - 859
| PDF (287 KB)

## Aims & Scope

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

Full Aims & Scope