Generally, the toroidal transformer will be encapsulate in production, and the common filling and sealing method is central hole filling. The main functions of the toroidal transformer encapsulating are as follows.
1. After filling the middle hole of toroidal transformer, it can effectively reduce the coil vibration caused by alternating current and reduce the transformer noise
2. After the central hole of the ring transformer with mounting bracket is filled with glue, it can prevent the transformer from loosening or rotating with the central axis due to the vibration during the transportation of the whole transformer.
3. Epoxy resin is used for encapsulating of & toroidal transformer. Epoxy resin has good adhesion strength to the surface of metal and non-metal materials, and has good dielectric properties and thermal conductivity.
4. Due to the good thermal conductivity of epoxy resin, the middle hole of ring transformer has the effect of heat dissipation after being filled with glue, which is conducive to heat conduction and heat dissipatio