Abstract: A high-power electrodynamic machine operates at a relatively high rotational speed and has dual rotors. In a preferred generator embodiment, one relatively massive first rotor having a magnetic device integral therewith is dedicated to the main generator. The exciter generator, which is relatively less massive, is isolated on a second rotor, which has a magnetic device integral to it. Only three bearings are required. The distance between the two bearings for the first rotor is relatively short, and the first rotor is relatively stiff, both of which facilitate operation of the first rotor below the critical speed. The junction of the first and second rotors further includes support of a junction end of the second rotor. The second rotor is driven by a prime mover via the first rotor. Means for providing electrical connections between the magnetic devices of the first and second rotors is also provided.

Abstract: A lug with relatively small resistance is provided that allows current to be determined between a source and a load by measuring the voltage drop across the lug. The voltage drop is sufficient to be above the electronic noise, and yet the resistance of the lug is low enough so that the heat produced by current flow is small compared with the heat generated by the source. The material comprising the lug is of a type and strength to be readily manufactured, and its resistivity varies by a relatively small amount with temperature.