Diagram of high frequency transformer structure
The basic structural components of a high frequency transformer are iron core and winding. In order to improve the heat dissipation condition, the body of the large-capacity and medium-capacity transformer is immersed in the closed oil tank filled with transformer oil. In order to ensure the safe and reliable operation of the transformer, there are also oil storage tank, gas relay and safety airway accessories
The core serves as the magnetic circuit of the high frequency transformer. It also ACTS as the mechanical framework of the transformer. In order to improve the magnetic conductivity and reduce the loss caused by the alternating magnetic flux in the core, the core of the transformer is made of electrotechnical steel sheet with a thickness of 0.35mm to 0.5mm. The two sides of the electrical steel sheet are coated with insulation layer, which ACTS as insulation. Large capacity transformers are mostly made of cold-rolled electrician steel with high magnetic conductivity and low loss. The core of a power transformer is usually a core structure, and the core can be divided into two parts: a core pillar (part with winding) and an iron yoke (part connected with two core pillars). The winding is arranged on the core post, and the iron yoke closes the magnetic circuit between the core post. In core column and iron yoke, combined into the whole core assembly with overlapping type, make each layer seam is not in the same place, so can reduce the excitation current, but the disadvantage is that complex assembly, takes work. In general transformer, the section of iron core column adopts the stepped form of outer contact circle. Square is used only when the transformer capacity is small. Ac flux in the core will cause eddy current loss and hysteresis loss, so that the core heat. In the core of large capacity transformer, oil channel is usually set up. The core is immersed in transformer oil. When the oil flows through the oil channel, the heat in the core can be carried away.