Toroidal transformer is a major type of electronic transformer. It is currently widely used in many aspects such as household appliances and other computers, equipment, audio equipment, telecommunications, instruments and lighting equipment with high technical requirements. The main purpose of toroidal transformer is as a power transformer and isolation transformer. Of course, there are also some specific occasions where it is used, such as waterproof (rainproof) transformers, etc. Next, the editor of Shengyuan Transformer will take you to learn about the internal structure of the toroidal transformer in 5 minutes.
1. Iron core: ordinary transformers are stacked with silicon steel sheets, and the iron core of the wound iron core transformer is wound with silicon steel strips. Its function is to form an industrial frequency alternating magnetic flux under the action of the alternating current of the primary coil, and the alternating magnetic flux in the iron core induces the electromotive force in the secondary coil to form a low-voltage power supply. The iron core is the main body for completing the conversion of electrical energy, magnetic energy, and electrical energy.
2. Winding (commonly known as coil): It is generally wound on a winding mold with insulated flat copper wire or round copper wire. It includes two groups: primary and secondary (high voltage and low voltage). The primary coil is to introduce the primary electric energy into the transformer to complete the excitation process, and the other part fills the electric energy in the secondary coil. The secondary coil converts magnetic energy into electric energy and transmits it out. The coil is usually connected according to a certain electrical circuit connection method.
3. Body insulation: including primary and secondary insulation, turn-to-turn insulation, insulation with the iron core, and insulation with the shell. The materials used are cardboard, epoxy resin, various insulating materials, transformer oil, etc. Among them, transformer oil not only has good insulation, but also helps the transformer to dissipate heat, which is used to cool the running iron core and coil.
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