Influence of Nano TiO_2 Filler on the Corona-resistant Magnetic Wire Insulation Performance of Inverter-fed Motor
He Enguang(Tsinghua University 100084 China) Liu Xuezhong(Xi'an Jiaotong University 710049 China)
Chemical constitution and microscopic pattern of the inorganic filler in a corona resistant magnetic wire insulating coating was tested and analyzed. The electricity,light and thermal effect of packed nano TiO 2 powders during the course of insulation failure was investigated from the point of view of inorganic filler utility. When the corona resistant magnetic wire modified by nano TiO 2 filler suffers corona damage,the layer of nano TiO 2 precipitate can improve electric field distribution and increase capacity of heat conduction.At the same time,the nano TiO 2 precipitate forms an electron and UV(ultraviolet ray )shielding layer to capture the electric charge and absorb UV generated by corona.It provides some theoretical reference foundations for manufactureing enameled magnetic wire of inverter fed motors.