Double-supply-frequency pressure pulsation in annular linear induction pump, part II: reduction of pulsation by linear winding grading at both statorends

In the previous work, the authors showed that the double-supply-frequency p ressure pulsation comes from a disturbance of the electromagnetic force occ urring near the stator ends, and hence the pressure pulsation may be reduce d by some way that suppresses this disturbance, e.g. by a winding grading a t the stator ends. In the present work, an experiment and a numerical analy sis are carried out to verify the effect of linear winding grading. The exp erimental data and the numerical results show that this type of grading is an effective way to reduce the pressure pulsation. In addition, the experim ental data reveals that the linear winding grading improves the pump effici ency. (C) 2000 Elsevier Science S.A. All rights reserved.