Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Shingo Hashimoto0
Hideaki Kimura0
Date of Patent
October 19, 2010
0Patent Application Number
117273380
Date Filed
March 26, 2007
0Patent Primary Examiner
Patent abstract
A varnish impregnation state determination method for determining a varnish impregnation state of a core assembly that is formed by disposing a coil inside a slot of a motor core and impregnating the coil and an interior of the slot with a varnish, including applying an alternating current voltage between the motor core and the coil to determine tan δ that serves as a dielectric dissipation factor; and determining that the varnish impregnation state of the core assembly is normal when a value of the tan δ is equal to or smaller than a predetermined non-defective article reference value.
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