An AC conduction pump with inductive reactive-power compensation

Alternating-current conduction pumps are fully competitive for low hydraulic power, but have a major shortcoming: the low cos var-phi due to the unfavorable relation between the resistive and reactive power levels. In this work a pump is considered without allowance for the end effects with the armature compensated. The calculated results are applied to a three-phase conduction pump with intermediate transformer. The basic trends for such a pump with inductive compensation are calculated. The calculations show that the power factor can be raised substantially in a conduction pump by providing special inductive links between the winding phases. 7 refs., 4 figs