Risk Mitigation for High Temperature Superconducting Generators
NAVAL RESEARCH LAB WASHINGTON DC MATERIAL SCIENCE AND TECHNOLOGY DIV
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High temperature superconducting HTS motors and generators will enable high-efficiency, high power density naval propulsion, and compact electrical generators for weapons and ship systems. The second-generation high temperature superconductors 2G-HTS based on yttrium-barium-copper- oxide YBCO coated conductor architectures have undergone a processing technology breakthrough that has led to manufacturability of long lengths of these materials, sufficient for demonstrations of large motors and generators. Ensuring superior fatigue properties of the HTS materials compatible with the life-cycle of naval machinery is a key issue. NRL has been working closely with superconductor manufacturer Superpower, Inc., electric motor manufacturer Baldor Reliance, General Dynamics Electric Boat Division, and Naval Surface Warfare Center Carderock Division Philadelphia on risk mitigation demonstrations for a 10 MW HTS generator design. NRLs responsibility in this collaboration is assessment of the reliability of HTS coil design, particularly with respect to thermomechanical fatigue associated with coolingwarming between room temperature and the cryogenic temperatures at which the machines operate.
- Electricity and Magnetism