What kind of insulation plate do you know
Insulation plates are solids used to isolate different conductors. It is also generally required that the solid insulating material has both supporting functions. Due to the higher density of the solid insulating material, the breakdown strength is also much higher, and the insulation resistance, dielectric constant and variation range of the solid insulating material are very wide.
Solid insulating materials can be divided into two major categories, inorganic and organic.
Inorganic solid insulating materials: mainly powder mica and mica products, glass, glass fiber and its products, as well as electric porcelain and alumina films. They are resistant to high temperatures, are not easy to age, have considerable mechanical strength, and some of these materials, such as low cost, occupy a certain position in the application.
The glass process is simpler than ceramic and can be manufactured. Glass fibers can be made into filaments, cloths, and belts, have much higher heat resistance than organic fibers, and play an important role in the development of insulating structures to high temperatures.
Organic solid insulation material: In the 19th century, it was mainly natural, such as paper, cotton, silk, and vegetable oil that can be cured. All of these materials are flexible, can meet the application process requirements, and easy to obtain.
Silicone resin combined with less alkali glass cloth, greatly improved the heat rating. Polyvinyl formal for the paint base made of enameled wire to open up the broad prospects of enameled wire, replacing the silk envelope and yarn envelope. The thickness of the polyester film is only several tens of micrometers, and it is used instead of the original paper and cloth, so that the technical and economic indicators of motors and electrical appliances are greatly improved. Polyaramid fiber paper, polyester film and polyimide film are used together to make the heat insulation grade of the motor slot insulation become class F and class H respectively. Elastomeric materials have similar developments, such as heat-resistant silicone rubber, oil-resistant nitrile rubber, and subsequent fluororubber, ethylene-propylene rubber, and the like.