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IEE Proceedings B - Electric Power Applications

Issue 1 • Date January 1980

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Displaying Results 1 - 7 of 7
  • Comparative study of saturation methods in synchronous machine models

    Publication Year: 1980, Page(s):1 - 7
    Cited by:  Papers (8)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (726 KB)

    The paper investigates the use of various mathematical models to represent saturation in a synchronous machine. For the first time special attention is given to quadrature axis saturation. Calculated transient-response results are compared in order to find an accurate and computationally economical method of allowing for saturation. View full abstract»

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  • Oscillatory synchronous linear motor with permanent-magnet excitation

    Publication Year: 1980
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (630 KB)

    The paper describes the construction and principle of operation of a permanent-magnet-excited linear oscillatory motor. As part of an automated frequency adaptive drive, the motor is suitable for driving smaller resonance mechanisms.7 It points out the prerequisites for the use of permanent magnets in the construction of the motor and shows the advantages of the Alnico types of material. The demag... View full abstract»

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  • Voltage waveform distortion in synchronous generators with rectifier loading

    Publication Year: 1980, Page(s):13 - 19
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (619 KB)

    Armature voltage waveforms of synchronous generators with bridge rectifier loads are distorted to a degree determined by the generator transient (or subtransient) inductances. A generator with zero transient saliency (z.t.s.) has a true sinusoidal waveform, apart from commutation disturbances occurring four times a cycle. The disturbance level is reduced by decreasing the generator transient induc... View full abstract»

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  • High-performance eddy-current dynamometers

    Publication Year: 1980, Page(s):20 - 28
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1068 KB)

    The development is described of a new range of eddy-current dynamometers with capacity ranging from 70 kW at up to 12000 rev/mm to 500 kW at up to 4500 rev/min. These are dry-gap, homopolar, disc-type inductor machines in which the excitation coils and water-cooled lossplates are stationary and only a toothed steel member rotates. A design analysis procedure is presented which was used in the deve... View full abstract»

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  • Magnetic forces in idealised saturable-pole configurations

    Publication Year: 1980, Page(s):29 - 33
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (630 KB)

    Conditions for the validity of scaling of nonlinear magnetic fields are presented and applied to an idealised form of the fundamentally important saturable overlapping rectangular-pole configuration. This allows the dependence of force on other problem variables to be expressed in a surprisingly simple and generalised way and economises very significantly on tedious numerical work. Results confirm... View full abstract»

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  • Coil-less cold-cathode arc chutes for high-speed d.c. circuit breakers for use on traction systems

    Publication Year: 1980, Page(s):34 - 45
    Cited by:  Papers (2)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1664 KB)

    The paper describes the principles of d.c. arc extinction using cold-cathode arc chutes, a type originally designed for use with a.c. circuit breakers. Design details are given for the coil-less cold-cathode arc-chute circuit breaker, illustrating the fundamental requirements of the arc chute, contacts, mechanism and withdrawable circuit breaker in its metal enclosed cubicle for use up to 3 kV d.c... View full abstract»

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  • `Optimiser¿: a microcomputer-based current controller to improve voltage levels in rural locations

    Publication Year: 1980, Page(s):46 - 55
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1110 KB)

    The paper describes the application of a microcomputer to improve voltage levels and motor starting performance in rural locations by controlling power consumption according to some predetermined stategy. Results obtained with a prototype installation are given and the direction being taken in present and future work is described. View full abstract»

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