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Ac loss analysis for superconducting generator armatures wound with subdivided YBaCuO coated tape.

Author(s) : OBERLY C. E., LONG L., RHOADS G. L., et al.

Type of article: Article

Summary

Advances in YBaCuO coated thin film tape may allow narrow filaments with very high current density on a thin metal alloy substrate which is separated from the superconductor by a dielectric buffer. These tapes will exhibit minimized ac losses by subdividing the YBaCuO layer with barriers which exhibit high electrical resistance. Assuming a fully penetrated magnetic field, low loss conductor concepts were incorporated into 1 MW armature designs for various configurations of YBaCuO conductors over the frequency range 50-1000 Hz. Low ac loss armature conductor designs are developed for megawatt class generators loss for both a frequency range 50 Hz utility application and a higher frequency aircraft application. Conductor design tradeoffs are discussed and ac loss minimization techniques compatible with realistic YBaCuO coated conductor processing are considered. The ac loss in YBaCuO armature windings of a synchronous alternator may for the first time permit practical, lightweight all-cryogenic generators which can deliver > megawat at frequencies much greater than 50-60 Hz.

Details

  • Original title: Ac loss analysis for superconducting generator armatures wound with subdivided YBaCuO coated tape.
  • Record ID : 2003-0584
  • Languages: English
  • Source: Cryogenics - vol. 41 - n. 2
  • Publication date: 2001/02

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