The longitudinal end-effect associated with the short primary linear induction motor (LIM) distinguishes it from the rotary induction motor (RIM) insofar as analytical modelling is concerned. The short-primary phenomenon can be considered as a space transient effect, in which longitudinal mmf and flux distributions are described with exponential envelopes having speed dependent 'space constants'. A second approach treats the finite length winding as the superposition of many 'long' windings or space-harmonic components. The two viewpoints are complementary, and comparison to the time-domain/frequency-domain duality of network theory is appropriate. The classical equivalent circuit provides a convenient model for the RIM, but does not account for longitudinal end-effects in LIM's. Two variations of the equivalent circuit can be developed from the end-transient and space-harmonic bases, respectively. It will be shown that both equivalent circuits are useful in determining the dynamic performance of LIM's, either from standstill measurements or from parameter computations. Two representations of the LIM longitudinal end-effect have been discussed. Both were presented in equivalent circuit terms to show that standard RIM circuit parameter formulae, or measured (standstill) LIM parameters may be employed in dynamic performance prediction. The space harmonic model is computationally more complex than the end transient model, but can offer a means of including the effects of discrete conductor placement, half-filled end slots, and unconventional winding geometries.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Space-harmonic and end-transient representations of the linear induction motor


    Additional title:

    Raumzeiger und Transienten-Endzustandsdarstellung bei Kurzstator-Linear-Asynchronmotoren


    Contributors:


    Publication date :

    1984


    Size :

    4 Seiten, 8 Bilder, 1 Tabelle, 5 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    LINEAR INDUCTION MOTOR AND ELEVATOR

    SHIMURA ITSUKI / NAKATSUGAWA JUNNOSUKE / MORI KAZUHISA | European Patent Office | 2020

    Free access

    A reconfigurable induction motor drive with harmonic cancellation feature

    Qian, L. / Cartes, D. / Hui Li, et al. | IEEE | 2005


    A reconfigurable induction motor drive with selective harmonic cancellation

    Qian, L. / Cartes, D. / Lee, H. et al. | British Library Conference Proceedings | 2006


    Linear induction motor driving overhead crane

    Engineering Index Backfile | 1966