Ibrahim  A.M. Abdel-Halim, Ahmed  M. Hassan, Hamed G.  Hamed, 
    Steady-State Performance of a Directly Connected PV Array/Six-Step VSI/Induction Motor System,
    International Journal of Electrical and Power Engineering,
    Volume 4,Issue 2,
    2010,
    Pages 105-112,
    ISSN 1990-7958,
    ijepe.2010.105.112,
    (https://makhillpublications.co/view-article.php?doi=ijepe.2010.105.112)
    Abstract: In this study, the analysis of a PV array connected directly without an intermediate converter to a voltage-source inverter/induction motor system driving a centrifugal pump is presented. This method is based on that the VSI/induction motor system, operating at a constant air gap flux can be connected directly to the PV array by controlling the insolation level to which the PV array is subjected.
    Keywords: induction motor;voltage source inverter;PV array;pump;electrical energy;Egypt