Protection for motors in refrigerated environments
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United States of America Patent
Stats
-
Jan 23, 1996
Grant Date -
N/A
app pub date -
Jul 6, 1994
filing date -
Jul 6, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A protection system for electric motors in refrigerated environments, especially those environments cooled to very low temperatures, includes routing a cryogen coolant through the electric motor. A minimum flow of cryogen coolant is maintained through the motor to prevent ingress of moisture in the motor interior. The arrangement is especially useful with cryogenically cooled refrigeration systems, because the same cryogen coolant used to refrigerate the system can also be used to provide a purging flow of cryogen coolant gas through the electric motor.
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