Snubbers for low temperature power electronics

Electricity: electrical systems and devices – Safety and protection of systems and devices – Superconductor protective circuits

Reexamination Certificate

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C257S532000, C257S536000, C257S713000, C257S714000, C257S716000

Reexamination Certificate

active

07369377

ABSTRACT:
Switching losses and conduction losses are isolated by networks which are partially cryogenic and partially at room temperature. Switching losses are independent of temperature. Advantageously the switching losses are taken in a snubber network at room temperature and conduction losses are incurred at cryogenic temperatures, where majority carrier devices like MOSFETs operate with ultra low on-state resistance and corresponding low conduction losses. Low loss leads carry current efficiently from the cryogenic environment to room temperature without adversely affecting refrigeration. Switch and snubber network may both operate cryogenically.

REFERENCES:
patent: 5965959 (1999-10-01), Gamble et al.
patent: 6163064 (2000-12-01), Evans, III

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