- 07
- Oct
What is the role of iron cores in power transformers?
鐵 核心 is the main part of the magnetic circuit in the transformer. It is usually composed of hot-rolled or cold-rolled silicon steel sheets with high silicon content, thickness of 0.35 or 0.5 mm, and coated with insulating paint. The 鐵 核心 is divided into two parts: an iron core column and an iron yoke, and the iron core column is sleeved with windings; the iron yoke is used to close the magnetic circuit.
核心結構有兩種基本形式:核心型和殼型。
殼式變壓器,鐵芯採用優質、不老化、冷軋、取向、高導磁矽鋼片製成。 有兩條平行的磁路,鐵芯水平排列,使鐵芯可以環繞線圈。 殼式變壓器在底部油箱法蘭上堆放有規則寬度矽鋼穿孔的鐵芯形成搭接接頭,上油箱下降到線芯和線圈組件,然後可以焊接到底油箱上,以實現固定鐵心。 由於油箱側板的張力,鐵芯也與外部設備固定,降低了噪音,消除了運行過程中鬆動的可能性; 同時,窄鐵芯大大提高了冷卻效果。 與傳統的鐵心式變壓器不同,殼式變壓器具有外鐵型結構,鐵芯不需要設置油道,提高鐵芯的冷卻效果。