Superconducting PM undiffused machines with stationary superconducting coils
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United States of America Patent
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-
Mar 2, 2004
Grant Date -
May 22, 2003
app pub date -
Jan 9, 2003
filing date -
Jun 1, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A superconducting PM machine has a stator, a rotor and a stationary excitation source without the need of a ferromagnetic frame which is cryogenically cooled for operation in the superconducting state. PM material is placed between poles on the rotor to prevent leakage or diffusion of secondary flux before reaching the main air gap, or to divert PM flux where it is desired to weaken flux in the main air gap. The PM material provides hop-along capability for the machine in the event of a fault condition.
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