High and low voltage coils use NomexRinsulation material, impregnated with intemational advanced agent-free vamish multiple timesbyPl vacuum pressure equipment, high-strength H-class insulation materal for extemal useThe materal is sealed and cured at hightemperature to ensure thatno partial discharge occurs under operating conditions.The high-voltage colis made of high mechanical strength and good heat disipation conditions (both high- and low-voltage cois are madeof Nomex, whichcan be used for a long time above 200?C.Rinsulaion materiall continuousThe structlure avoids the shortcomings ofmultl-laver cyindrical coils such ashigh intenlavervoltage, poor heatissipation abily, asythermal breakdown and lowmechanicalstrenath,thus imoroving the relabily of oroduc operation.