Investigation of small D.C. electromagnetic pumps
Ediin, Robert L.
Lamb, Jay W.
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A small, direct current electromagnetic conduction pump was designed according to the equivalent circuit theory of A. H. Barnes. Design was aided by data from a prototype also constructed by the authors. Distinguishing features of the pump are its small size, the use of non-conducting pump walls, and the use of mercury as the working fluid. Performance was compared with theory. Deviations were attributed to electrode contact resistance and to the interaction between magnetic leakage flux and fringe current. Contact resistance to mercury of rhodium and nickel electrodes was determined with the aid of a jig designed for the purpose. A magnet design using flux plotting techniques is presented. Distinguishing feature of the magnet is its cylindrically shaped yoke.
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