Linear Motor Technology in the Vertical Plane

Period of Performance: 05/13/1999 - 11/13/1999


Phase 1 SBIR

Recipient Firm

Power Superconductor Applications Corp.
930 Cass Street
New Castle, PA 16101
Principal Investigator


PSA has experience in the manufacture of both transverse flux linear induction machines (termed TFMs) and in conventional longitudinal flux LIMs (LFMs). The application of linear motors for vertical elevators for Navy ships involves a combination of transverse flux and longitudinal flux machines. Specifically, the single-sided, self-levitating "Magnetic River" TFM is ideal for the horizontal movement applications and couples to a double-sided LFM for vertical lift capability with multiple lift stations. This in our experience combines the optimum characteristics for both machines for maximizing the power to weight ratio, power factor, efficiency and specific thrust. Herein is provided a baseline design for a 12,000 lb (5454 kg) lift system operating at a typical service speed of 10-20 m/s and yielding a baseline power rating of 1.07 Megawatts for a vertical thrust of 53,500 Newtons.