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Temperature and frequency effects in a high-performance superconducting bearing

By: McCrary, K.E.; Johnson, P.E.; Strasik, M.; Hull, J.R.; Day, A.C.; Edwards, J.; Hawkins, R.A.; Yoder, M.L.; Schindler, J.R.; Mittleider, J.A.;

2003 / IEEE

Description

This item was taken from the IEEE Periodical ' Temperature and frequency effects in a high-performance superconducting bearing ' A high-temperature superconducting (HTS) bearing was fabricated and tested by itself and as a component in a 1-kWh and a 10-kWh flywheel energy system (FES). The rotational losses of the HTS bearing as a function of rotational rate and HTS temperature were determined. The 1-kWh FES was tested with a motor/generator and with an eddy current clutch to determine the motor/generator losses.