Vforge Upgrades Die-Casting System, Improves Rotor Properties Electrical Conductivity Raised Above 100% IACS, Soundness Remains High in Two Motor Series Vforge, Inc., research arm of the CDA-led Copper-Based Casting Technology (C-BCT) Program, has made several technological improvements to the copper rotor die casting system at its Lakewood, Colorado, facility, according to Dr. John G. Cowie, program manager. Two series of rotors from each of two rotor manufacturers (Reliance Electric and Ramco Rotors), produced after installation of the upgrades, are currently under evaluation. Initial testing suggests that the changes led to marked improvements in quality and conductivity. Improved Protection Raises Conductivity Melting equipment currently used by Vforge consists of a 60-kW induction power supply driving a single station push-up furnace with 35-lb melting capacity. The furnace, which melts a charge of chopped C10100 copper rod in nine minutes, provides sufficient hot metal for a single shot (Figures 1 and 2). Target pouring temperature is 1,350°C (2,462°F). MORE >>

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