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IEE Proceedings B - Electric Power Applications

Issue 1 • Date Jan. 1991

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Displaying Results 1 - 5 of 5
  • Optimal-efficiency excitation of variable-reluctance motor drives

    Publication Year: 1991, Page(s):1 - 14
    Cited by:  Papers (33)  |  Patents (4)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1491 KB)

    The authors examine the optimal-efficiency excitation of a variable-reluctance motor (VRM) drive operating at constant speed. The drive comprises a motor, an inverter, an excitation and a control strategy. The excitation refers to a prescribed relationship between the phase currents and rotor position that results in the desired drive behaviour. The excitation is considered from an integrated view... View full abstract»

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  • Pulse doubling in parallel convertor configurations with interphase reactors

    Publication Year: 1991, Page(s):15 - 20
    Cited by:  Papers (11)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (349 KB)

    It is shown that rectification and reinjection of the DC ripple can double the number of pulses of parallel connected AC/DC power convertors with interphase reactors. Theoretical and experimental evidence is provided to demonstrate that the combined use of phase-shifting and DC ripple reinjection techniques effectively quadrupoles the pulse number of bridge rectifiers and inverters. Although the a... View full abstract»

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  • Vibration characteristics of motors with dynamic absorbers

    Publication Year: 1991, Page(s):21 - 27
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (456 KB)

    A method of reducing the torsional vibration of a motor using a dynamic absorber has been studied. The vibration characteristics of a motor-mounted dynamic absorber have been analysed. Theoretical and experimental investigations show that the absorber is highly effective, even for the reduction of low-amplitude torsional vibrations where viscous dampers do not function as well. Furthermore, it is ... View full abstract»

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  • Implicit rotor-position sensing using motor windings for a self-commutating permanent-magnet drive system

    Publication Year: 1991, Page(s):28 - 34
    Cited by:  Papers (15)  |  Patents (6)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (616 KB)

    The authors describe a novel method of rotor-position sensing of permanent-magnet machines, which requires no encoder nor any modification to conventional machines. The machine is electronically commutated, by virtue of position sensing, achieved through measuring the modulation in the inverter carrier frequency component, caused by the positional variation in motor winding impedance. A closed-loo... View full abstract»

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  • Decomposition of voltage, current and power

    Publication Year: 1991, Page(s):35 - 39
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    A new approach for decomposing voltage, current and power in power systems is presented. According to different situations, the hierarchical decomposition can be used. When u and i have the same harmonic spectra, Czarnecki's concepts are applied; when u and i have different harmonic spectra, Slonim and Wyk's concepts are considered View full abstract»

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