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IEE Proceedings B - Electric Power Applications

Issue 5 • September 1982

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Displaying Results 1 - 10 of 10
  • An analysis of the induction motor. Part 1: Steady-speed operation

    Publication Year: 1982, Page(s):229 - 237
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (912 KB)

    A new analysis of the induction motor is presented. The machine equations are re-expressed as integral equations, which are solved to yield analytical expressions for the stator and rotor currents and the motor torque. Experimental and theoretical results are compared for both slip-ring and squirrel-cage machines. View full abstract»

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  • An analysis of the induction motor. Part 2: Damping and synchronising torque production

    Publication Year: 1982, Page(s):238 - 242
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (398 KB)

    Under conditions of variable-frequency supply, the induction motor is known to exhibit regions of lightly damped or oscillatory motion. An investigation of this problem is presented which utilises the integral equation method to solve the machine equations. The instability is explained in terms of the mechanism of parametric action. View full abstract»

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  • An analysis of the induction motor. Part 3: Power/frequency relationships

    Publication Year: 1982, Page(s):243 - 247
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (571 KB)

    A study is presented of the relationships which govern the power flow in induction motors. Equivalent circuits and the Manley-Rowe equations are employed to demonstrate that the frequencies of the current components define the ratios in which supply frequency power is transformed to other frequencies. General relationships are formulated, for the first time, which specify the steady-torque and dam... View full abstract»

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  • Performance of induction motor driven from self-commutating inverter

    Publication Year: 1982, Page(s):248 - 250
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (292 KB)

    A self-commutating thyristor convertor, fed from a DC supply, drives an induction motor which is provided with excitation capacitors. The frequency of the alternating voltage at the convertor output, and the corresponding speed of the induction motor, can be controlled by varying the values of capacitance, direct voltage, and inverter control angle. The motor operates satisfactorily when loaded. A... View full abstract»

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  • Slotless construction for small synchronous motors using samarium cobalt magnets

    Publication Year: 1982, Page(s):251 - 261
    Cited by:  Papers (7)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1151 KB)

    Rare-earth magnet materials offer the possibility of slotless designs for miniature motors. Comparative analyses of slotted and slotless designs are presented for 2-pole permanent-magnet synchronous motors where the magnet has a linear demagnetisation characteristic. Experimental results are given for the magnet field of the slotless design in which the magnet end effect is considered. Results fro... View full abstract»

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  • Performance of current-fed inverter system with controlled flywheeling applied to supply converter

    Publication Year: 1982, Page(s):262 - 270
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (830 KB)

    The input and output conditions for a regenerative thyristor-bridge convertor can be improved in many respects by adopting the controlled flywheeling technique. This paper reports an investigation into the performance of a current-fed inverter and induction-motor system when controlled flywheeling is applied to the supply convertor. It is concluded that the system and motor efficiency, supply-powe... View full abstract»

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  • Theory and design of linear induction motors with steel reaction plates

    Publication Year: 1982, Page(s):271 - 278
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (651 KB)

    The theory of linear induction motors (LIMs) on steel reaction plates for low-speed applications is presented. The difference in operation of LIMs on steel and aluminium (nonferromagnetic) reaction plates are highlighted using the derived goodness factor for LIMs on steel reaction plates. The specific design parameters for LIMs operating with steel reaction plates are derived. Comparison between t... View full abstract»

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  • Currents and potentials in earth-return circuits exposed to alternating current electric railways

    Publication Year: 1982, Page(s):279 - 288
    Cited by:  Papers (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (815 KB)

    Abstract: This paper presents a method of calculation of currents and potentials, excited by the electromagnetic effects of an AC-electrified railway system, along two infinitely long earth-return circuits buried in parallel in the vicinity of the tracks. Inductive and conductive coupling, exists within the railway system, and the earth-return circuit is taken into account, as well as interaction ... View full abstract»

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  • Performance evaluation of a dc motor fed from an asymmetrical single-phase bridge

    Publication Year: 1982, Page(s):289 - 298
    Cited by:  Papers (3)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (901 KB)

    Lack of simple methods for predicting some of the losses in a machine in service has limited the theoretical work on additional losses in DC motors with armature current ripple to the prediction of additional copper losses. The additional core losses of a machine fed from the asymmetrical single-phase bridge are predicted from equivalent circuits which contain elements for the core. A method is de... View full abstract»

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  • Book review: Thyristor DC Drives

    Publication Year: 1982
    IEEE is not the copyright holder of this material | PDF file iconPDF (87 KB)
    Freely Available from IEEE