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Electrical Engineers, Proceedings of the Institution of

Issue 8 • Date August 1967

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Displaying Results 1 - 25 of 34
  • Experimental data on X band surface waveguides and launchers

    Publication Year: 1967, Page(s):1021 - 1029
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1088 KB)

    The paper describes some investigations which have been carried out into the behaviour of dielectric-coated wires used as surface waveguides at Xband frequencies. The decay coefficient of the radial external field strength has been determined for several wires, and the corresponding attenuation coefficient has been calculated. The design of a suitable surface-wave launcher is also discussed, and t... View full abstract»

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  • Effect of degenerate E11ν mode in H01ν mode cavity on the measurement of complex permittivity

    Publication Year: 1967, Page(s):1030 - 1034
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (584 KB)

    The paper discusses measurements of the relative permittivity and the loss angle (tan δ) of a material using the resonance method. The resonator used was a cylindrical cavity in which the dominant-mode excitation was H01ν. The cross-section of each sample had a radius equal to the internal radius of the cavity, and the measurements were made with sample thicknesses rangi... View full abstract»

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  • Oblique-incidence millimetre-wave plasma diagnostics

    Publication Year: 1967, Page(s):1035 - 1044
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1143 KB)

    A beam of millimetre-wave radiation entering a plasma obliquely may re-emerge by refraction just as radio waves are returned to Earth by the ionosphere. The separation D between the points of entry and re-emergence depends on the angle of incidence ¿i, and on the electron-density distribution in the plasma. If D is studied as a function of ¿i, the electron-density distribution can be deduced by ... View full abstract»

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  • Field decomposition in compressible magnetoplasmas by a perturbation technique

    Publication Year: 1967, Page(s):1045 - 1047
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    The paper presents a method for the determination of the electromagnetic and pressure fields produced by a given distribution of source currents in a lossy, anisotropic, compressible plasma. With appropriate series expansions of the permittivity and compressivity tensors, a perturbation approach is used to decompose the coupled fields into partial fields which satisfy a family of recursive equatio... View full abstract»

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  • First-order nonlinear effects in travelling-wave tubes

    Publication Year: 1967, Page(s):1048 - 1050
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (353 KB)

    Previous analytical work on travelling-wave-tube (t.w.t.) nonlinear effects has been extended to include the effects of electron space-charge and nonzero beam-coupling impedance. Modulation transfer effects for single- and double-signal operation in a weakly saturated state are discussed and shown to be determined by the design parameters of the t.w.t. Large coupling impedance and low circuit loss... View full abstract»

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  • Zero-transient switching of a subharmonic parametric oscillator

    Publication Year: 1967, Page(s):1051 - 1055
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (557 KB)

    An analytical technique is presented for the determination of the time variation of the current necessary to switch phases of a subharmonic parametric oscillator within one cycle of the output voltage and with zero transient. An approximation to the required switching current is generated by a suitable shaping circuit, and the validity of the analysis is confirmed by practical observation. Using s... View full abstract»

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  • Frequency doublers using charge-storage/step-recovery diodes

    Publication Year: 1967, Page(s):1057 - 1062
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (822 KB)

    Computed results are given for the efficiency and power output of a p-n junction-diode frequency doubler operating in the charge-storage/step-recovery mode. These results are compared to those obtained with the same diode used as a nominally or overdriven varactor, and the limitations and advantages of the storage/recovery mode are discussed. It is shown that for moderate efficiencies, e.g. ¿3dB,... View full abstract»

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  • Filter synthesis using Legendre polynomials

    Publication Year: 1967, Page(s):1063 - 1064
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | PDF file iconPDF (269 KB)
    Freely Available from IEEE
  • Distributed amplifiers: survey of the effects of lumped-transmission-line design on performance

    Publication Year: 1967, Page(s):1065 - 1074
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1170 KB)

    A survey of the effects of lumped-transmission-line design on the performance of distributed amplifiers is presented. A general formula for the gain of a distributed amplifier using nonuniform lines, but with image-impedance match at each connection, is given. The general formula for gain reduces to all the special formulas derived in the literature under assumed constraints in the network structu... View full abstract»

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  • Effect of internal thermal feedback on transistor quiescent stability

    Publication Year: 1967, Page(s):1075 - 1076
    IEEE is not the copyright holder of this material | PDF file iconPDF (156 KB)
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  • Universal winding for electrical-machine research

    Publication Year: 1967, Page(s):1077 - 1083
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1043 KB)

    Since the emergence of pole-amplitude modulation as a new winding logic, which has now been shown to be applicable both to single-speed and to change-speed machines, interest in the theory of electrical-machine windings has been increased. To enable the student and the research worker to gain an insight into the subject by direct experimentation, at a moderate cost and with an enormous saving of t... View full abstract»

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  • Discussion on "Linear induction motors for low-speed and standstill application"

    Publication Year: 1967, Page(s):1084 - 1085
    IEEE is not the copyright holder of this material | PDF file iconPDF (391 KB)
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  • Discussion on 'Determination of load losses and torques in squirrel-cage induction motors'

    Publication Year: 1967, Page(s):1085 - 1088
    IEEE is not the copyright holder of this material | PDF file iconPDF (619 KB)
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  • Brushless and self-excited single-phase alternator

    Publication Year: 1967, Page(s):1089 - 1095
    Cited by:  Papers (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (866 KB)

    The paper describes a brushless, self-excited alternator in which the reverse-rotation component of the armature m.m.f. is used to increase the excitation current as the load is increased. The excitation scheme is power-factor sensitive, since the increase is greater as the load becomes more inductive, and the voltage regulation is within that normally required from single-phase self-excited machi... View full abstract»

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  • Discussion on "Testing and approval of electrical appliances"

    Publication Year: 1967, Page(s):1095 - 1098
    IEEE is not the copyright holder of this material | PDF file iconPDF (711 KB)
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  • Aircraft a.c. electrical systems using changeover contactors and rapid fault clearance

    Publication Year: 1967, Page(s):1099 - 1104
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (873 KB)

    Conventional aircraft electrical systems are liable to interruptions or disturbances for up to several seconds under fault conditions. Such interruptions may be limited to substantially less than 100ms by the use of a very simple nonparalleled system employing changeover contactors and forms of undervoltage and overvoltage protection which do not depend on time delays to discriminate between real ... View full abstract»

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  • Discussion on 'Barn hay drying'

    Publication Year: 1967, Page(s):1105 - 1106
    IEEE is not the copyright holder of this material | PDF file iconPDF (363 KB)
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  • Turbogenerator end-region magnetic fields

    Publication Year: 1967, Page(s):1107 - 1114
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1141 KB)

    A simple qualitative method of estimating the radial and axial magnetic-field components in the end region of turbogenerators is described. The method, which utilises conducting paper, has been applied to two machines having outputs of 2.5 MW and 500 MW, and has given reasonable agreement with measured results obtained by means of search coils. Although the method is generally used for estimating ... View full abstract»

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  • Digital-computer methods in dynamic-response analyses of turbogenerator units

    Publication Year: 1967, Page(s):1115 - 1130
    Cited by:  Papers (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1564 KB)

    A mathematical model for a turbogenerator unit is presented, based on the direct- and quadrature-axis equations of the generator, and associated equations for the prime mover and governor, and for the excitation control system. The solution of the equations of the complete model by digital computer is developed. In the representation of the generator, a method is explained by which the effective i... View full abstract»

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  • Power-system model

    Publication Year: 1967, Page(s):1131 - 1138
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1110 KB)

    The Central Electricity Generating Board is applying automatic control to some of the main functions of the Grid control centres and the generating stations. To facilitate part of this work a power-system analogue has been constructed. This is basically a 50c/s a.c. network with a unique simulation of generators and loads. A generator is simulated by a variable-frequency voltage behind a fixed rea... View full abstract»

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  • Developments in power-system control

    Publication Year: 1967, Page(s):1139 - 1148
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1626 KB)

    Recent developments in system control by the CEGB, including the use of digital computers, are described in the paper. The CEGB 2-tier control system is being reinforced by `district¿ control rooms and new `area¿ control rooms at the existing area control centres, and by a new national control centre in London with selective electronic display. The changeover to 3-tier operation with district, a... View full abstract»

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  • Some relay quantities for pilot-wire protection

    Publication Year: 1967, Page(s):1149 - 1155
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (923 KB)

    A reappraisal is made of multiterminal private pilot-wire protection. Pilot-wire relay operating and bias quantities are analysed separately. Possibilities of compensation to make relay quantities completely independent of pilot-wire characteristics for a multiterminal protection are examined for both circulating-current and opposed-voltage schemes. Practical methods of achieving such compensation... View full abstract»

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  • Discussion on "Operational statistics in the management of large distribution systems"

    Publication Year: 1967, Page(s):1155 - 1159
    IEEE is not the copyright holder of this material | PDF file iconPDF (941 KB)
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  • Origins of load losses in induction motors with cast-aluminium rotors

    Publication Year: 1967, Page(s):1159 - 1160
    IEEE is not the copyright holder of this material | PDF file iconPDF (320 KB)
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  • Back-to-back test for induction machines: motorised coupling

    Publication Year: 1967, Page(s):1160 - 1161
    IEEE is not the copyright holder of this material | PDF file iconPDF (317 KB)
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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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