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IEE Proceedings B - Electric Power Applications

Issue 2 • Date March 1985

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Displaying Results 1 - 10 of 10
  • DC traction motor with slotless armature

    Publication Year: 1985, Page(s):61 - 71
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1191 KB)

    The slotless armature concept is an attempt to overcome the problem of poor commutation in DC traction motors. A small (90 hp) motor has been fitted with such an armature and has undergone tests to investigate the properties of slotless armature motors in the areas of commutation, eddy-current loss and mechanical stress under electrical-fault conditions. It is verified that commutation is markedly... View full abstract»

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  • Multilayer analysis of electromagnetic systems incorporating layers of discrete conductors

    Publication Year: 1985, Page(s):72 - 76
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (498 KB)

    The paper presents the development of an electromagnetic model which represents an array of discrete conductors in a form suitable for use with the multilayer method of analysis of electromagnetic systems. The multilayer technique is thereby extended in scope to cover an important class of problems concerning eddy current effects in machine windings. The model employs the concepts of magnetic equi... View full abstract»

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  • Filter design for multiphase DC choppers

    Publication Year: 1985, Page(s):77 - 80
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (370 KB)

    Normalised equations for ripple voltage and currents are derived in terms of dimensionless quantities, and these equations can be used directly to evaluate the values of LC-filter components, taking into consideration the effect of the load current ripple on the RMS value of the chopper-generated line current ripple. View full abstract»

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  • Phase-angle control of the repulsion/drive force ratio in two-phase linear induction motor with nonferromagnetic secondary

    Publication Year: 1985, Page(s):81 - 86
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (582 KB)

    The repulsive/drive force ratio in a two-phase linear induction motor with a nonferromagnetic secondary can be changed over a wide range by changing the stator field from a travelling to a pulsating field. This can be achieved by controlling the phase angle between the two-phase currents of the stator. The stator electric loading of the unbalanced two-phase current system is derived, including the... View full abstract»

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  • Microprocessor control of a `hidden-link¿ convertor drive

    Publication Year: 1985, Page(s):87 - 92
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (968 KB)

    This synchronous motor drive, unlike the DC link convertor drive, has a single mode of operation from starting to above synchronous speeds. The simple control scheme requires synchronism to the supply waveforms and rotor position. Hardware, software and interface circuits for a Z80 microprocessor-based controller are described. A modest clock rate of 2.5 MHz is sufficient and still leaves the micr... View full abstract»

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  • Chopper control of DC disc-armature motor using power MOSFETs

    Publication Year: 1985
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (789 KB)

    A closed-loop current controller using power MOSFETs has been constructed for two-quadrant chopper control of a DC disc armature motor intended for use in an electric cycle. Theoretical analysis shows that lower energy requirements and higher efficiency are obtained using constant current, rather than voltage, control, and that approximately 30% of the energy expended in accelerating to maximum sp... View full abstract»

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  • Frequency-response identification of a linear helical reluctance motor

    Publication Year: 1985, Page(s):101 - 105
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (499 KB)

    The paper describes a frequency-response-identification method using a dedicated microprocessor. Although the detailed results discussed are with particular reference to the linear helical reluctance motor, the method is generally applicable to electrical machines. A linear incremental model is obtained based on the describing-function technique for a range of load-angle values. Magnetic saturatio... View full abstract»

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  • Adaptive microprocessor control of a linear helical reluctance motor

    Publication Year: 1985, Page(s):106 - 111
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (570 KB)

    It has been shown previously that open-loop control, using a dedicated microprocessor, achieves a very satisfactory dynamic and static performance. However, this performance is only valid provided that output inertia and load torque do not vary. This paper extends the work to closed-loop operation in which a nonlinear sampled-data feedback controller is proposed. It is found that the resulting sys... View full abstract»

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  • Helical motion induction motor

    Publication Year: 1985, Page(s):112 - 114
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | PDF file iconPDF (325 KB)
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  • Book review: Power Electronics and Variable-Speed Drives

    Publication Year: 1985
    IEEE is not the copyright holder of this material | PDF file iconPDF (170 KB)
    Freely Available from IEEE