Lackimprägnierungszustandsbestimmungsverfahren

摘要

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 tanδthat serves as a dielectric dissipation factor; and determining that the varnish impregnation state of the core assembly is normal when a value of the tanδis equal to or smaller than a predetermined non-defective article reference value.