Coating method of winding amorphous iron core insulating coating

Abstract

The invention relates to a coating method of a winding amorphous iron core insulating coating. The coating method comprises a first step that a whole amorphous iron core is arranged in epoxy glue to conduct vacuum impregnation, a second step that the surface of the amorphous iron core is coated with epoxy resin, and a third step of heating and solidifying after the amorphous iron core is coated with the modified epoxy glue coating. Gaps between amorphous strips are sealed and have certain strength after the epoxy glue impregnation, the coating is neat in surface and uniform in thickness, vibration and noises of the iron core are reduced, and integrated installation is convenient. The coating is thinner than general coating technique and solidifying time is shortened. The epoxy glue enables solidifying contraction percentage to be low, the epoxy glue coating has good adhesiveness and elasticity and has little stress to the iron core, and the coating has little influence on initial magnet conductivity and inductance of the amorphous iron core. The amorphous iron core dealt with the coating method can greatly reduce no-load loss.

Description

technical field [0001] The invention relates to a coating method of winding-type amorphous iron core insulation coating, which is mainly used in the manufacturing process of amorphous iron cores in single-phase and three-phase filter reactors in amorphous transformers and inverter power supplies. Background technique [0002] Amorphous nanocrystalline soft magnetic alloy materials have the advantages of both silicon steel and soft ferrite, with high saturation magnetic induction and extremely low iron loss, so they can replace silicon steel and some soft ferrite for various medium and high frequency power In the iron core material of electronic equipment, it plays a role in reducing the volume of the device and reducing the energy consumption of the equipment. If the iron core is made of amorphous material and used in a transformer, the energy-saving effect is very significant. The no-load loss of an amorphous transformer with the same capacity is only a quarter of that of a...

AI Technical Summary

Problems solved by technology

[0003] Amorphous material is a new material manufactured by rapid solidification technology. The amorphous iron core is formed by winding or stacking and extruding several layers of amorphous strips. This kind of lamination is easy to loose, and it is easy to generate vibration and noise. At the same time, the degree of magnetostriction of amorphous alloy is about 10% higher than that of silicon steel sheet, which also causes the iron core wound by it to be noisy.

In addition, due to the high hardness, thin thickness, and high brittleness of the amorphous strip, it is easy to produce some fragments during the production, assembly and use of finished products, and these fragments will have a greater impact on the performance and reliability of the product.

[0004] The traditional coating method of insulating coating generally uses epoxy resin on the surface of the iron core. The coating speed is slow, the surface is not easy to be smooth, the coating thickness is uneven, and the coating is relatively thick. However, this method is used for amorphous iron cores. It will cause the filling between the amorphous strips to be not dense enough, and the amorphous strips are easy to loose, which is prone to vibration and large noise, which will affect the performance of the iron core.