New anti-corona material for large-scale electric machine

The non-linear electrical conduction property of β-SiC micro-powder/epoxy ester lacquer composite was investigated. The β-SiC micro-powder was synthesized under different temperature and has different particle size. Experiment shows that the non-linear electrical conduction becomes greater by increasing the β-SiC powder particle size or synthesizing temperature. Under the same particle size conditions, the non-linear electrical conduction coefficient β and corona voltage rising with the β-SiC content increased. The β-SiC micro-powder is used to regulate the non-linear electrical conduction property of α-SiC, showing that it is possible to replace α-SiC with β-SiC for anti-corona material to increase greatly the anti-corona property