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Electric Power Applications, IEE Proceedings B

Issue 4 • Date July 1981

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Displaying Results 1 - 9 of 9
  • Experience with London Transport's traction motors

    Publication Year: 1981 , Page(s): 181 - 189
    Click to expandAbstract | PDF file iconPDF (1819 KB)  

    The paper is intended to discuss London Transport's experience with traction motors from the immediate postwar years up to the present time. New features introduced are evaluated and compared with previous arrangements as design philosophy has evolved in response to experience and changing requirements. View full abstract»

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  • Power-factor improvement in linear induction motors

    Publication Year: 1981 , Page(s): 190 - 194
    Cited by:  Papers (2)
    Click to expandAbstract | PDF file iconPDF (838 KB)  

    Linear induction motors have long been known to have low power factor, not merely on account of the usually large airgaps that they require, but also because a considerable proportion of the reactive VA arises as the result of the transient phenomena associated with the front and back edges of the primary. It is possible to reverse the effect of these transients by a novel arrangement of stator wi... View full abstract»

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  • Book review: Electric Machine Theory for Engineers

    Publication Year: 1981
    PDF file iconPDF (174 KB)  
    Freely Available from IEEE
  • Optimised designs of toroidal cage coils

    Publication Year: 1981 , Page(s): 195 - 200
    Click to expandAbstract | PDF file iconPDF (640 KB)  

    The toroidal cage coil is a heavy-duty inductor used in power electronics. This paper studies the geometrical proportions of the coil, and gives design curves to maximise inductance for coil weight, to maximise inductance for overall volume, and to minimise power losses. The effect of an axial hole on the electrical properties is examined. Although the hole can provide much improved heat transfer,... View full abstract»

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  • Acoustic noise and pulsating torques in a triac-controlled permanent-split-capacitor fan motor

    Publication Year: 1981 , Page(s): 201 - 206
    Cited by:  Papers (5)
    Click to expandAbstract | PDF file iconPDF (731 KB)  

    A normally quiet single-phase fan motor may become noisy when speed controlled using a conventional triac AC controller. The paper describes an investigation into the cause of this phenomenon. It is shown that the odd-time harmonic voltages introduced by the controller produce pulsating torques at all even multiples of the supply frequency, and that the extra noise components occur at these freque... View full abstract»

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  • Effect of load on the tangential-force pulsations and harmonic torques of squirrel-cage induction motors

    Publication Year: 1981 , Page(s): 207 - 211
    Click to expandAbstract | PDF file iconPDF (692 KB)  

    A method is given for the determination, on load, of the influence of slot combination on the tangential force pulsations and harmonic tooth-ripple components of torque that arise in induction motors. The method of conformal transformation and a surface integral method are used to obtain the tangential force acting on any stator or rotor tooth for any rotor position. The tangential force pulsation... View full abstract»

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  • Experimental determination of synchronous machine parameters

    Publication Year: 1981 , Page(s): 212 - 218
    Cited by:  Papers (7)
    Click to expandAbstract | PDF file iconPDF (815 KB)  

    Two equivalent models of synchronous machine with equal and unequal mutual reactances between the three direct-axis windings are examined. In the representation of the generator, a new method expressing the model parameters in terms of five measurable time constants is provided which does not require the usual simplifying assumptions. Furthermore, a method for computing the five time constants is ... View full abstract»

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  • Induction at a corner in perfect iron

    Publication Year: 1981 , Page(s): 219 - 221
    Click to expandAbstract | PDF file iconPDF (417 KB)  

    Magnetic circuits consisting of iron of high permeability ??r often have protruding and reentrant corners. Formulas are given for the fields inside and outside the corner regions. The nature of the field singularities, and the shape of equipotentials and lines of force, are investigated as a function of the opening angle of the corner. View full abstract»

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  • Cooling by heat pipe in a limited rotation rotary actuator

    Publication Year: 1981 , Page(s): 222 - 223
    Cited by:  Papers (2)
    PDF file iconPDF (217 KB)  
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