Patent ID: 7120993
Filing Date: 2006-10-17
Classification: H01F,H02K,Y10T

Abstract:
1. A method of manufacturing an insulated coil comprising: stacking a mica layer sheet to which a resin is adhered and glass cloth to which a resin is adhered, followed by pressurizing to obtain the mica layer sheet to which the glass cloth is adhered; applying a coating, to a surface of the glass cloth adhered to the mica layer sheet, of a mixture of inorganic particles having a thermal conductivity of at least 5 W/mK, a resins, and a solvent to form a layer of the mixture of the inorganic particles, the resin, and the solvent; reducing thickness of the layer of the mixture with a doctor blade, followed by pressurizing; volatilizing the solvent in the layer of the mixture to leave a thermally conductive layer containing the inorganic particles on the surface of the glass cloth adhered to the mica layer sheet; cutting the mica layer sheet to which the thermally conductive layer is attached to obtain a mica insulating tape with the thermally conductive layer on the surface of the glass cloth; and winding the mica insulating tape around a coil conductor.