Water-tree resistance evaluation method, insulation design method, and rotary electric machine
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United States of America Patent
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Jan 8, 2019
Grant Date -
Aug 4, 2016
app pub date -
Sep 20, 2013
filing date -
Sep 20, 2013
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Abstract
A water-tree resistance evaluation material including: a material selection selecting a candidate insulation material; a test carrying out a water tree test on a test piece having electrode holes formed on a first surface; and a candidate insulation material evaluation evaluating characteristics of the candidate insulation material, including progress and speed of a water tree. The test includes: a system and condition setting for setting a test system; a voltage application for grounding a ground-side electrode that is immersed in the ground-side aqueous solution, while applying an AC voltage to an application-side electrode that is immersed in the application-side aqueous solution; a measurement step; and a period determination for determining whether a test period has exceeded a predetermined period.
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