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Evaluation, construction and endurance testing of compression sealed pyrolytic boron nitride slot insulationA high-temperature statorette, consisting of an iron-27 percent cobalt magnetic lamination stack and nickel-clad silver conductors, was tested with pyrolytic boron nitride slot insulation. Temperatures were measured in each test to determine characteristics of slot linear heat conductance from statorette conductors. Testing was carried out to temperatures of approximately 1500 F in a vacuum environment of 10-8 torr. Three assemblies were built and tested, each having a different room temperature slot clearance. The final statorette assembly was subjected to a 100-hour vacuum aging test at 1400 F followed by 25 thermal cycles. Temperature data from the three assemblies showed that decreasing slot clearance and increasing compression loading did enhance heat transfer. The temperature difference between slot and lamination at 1400 F increased 4 F during the thermal aging and an additional 10 F during the 25 thermal cycles.
Document ID
19720011300
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Grant, W. L. (Westinghouse Electric Corp. Lima, OH, United States)
Date Acquired
August 6, 2013
Publication Date
October 1, 1969
Subject Category
Thermodynamics And Combustion
Report/Patent Number
NASA-CR-72849
WAED-69.26E
Accession Number
72N18950
Funding Number(s)
CONTRACT_GRANT: NAS3-10941
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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