Dry-Type Transformer Material Introduction
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Winding Materials
1. Pure Copper
Pure copper, as a material with high conductivity, has excellent electrical and thermal conductivity, making it ideal for high-power transformers. Compared to aluminum wire, it has lower losses and temperature rise, but is more expensive.
2. Aluminum Alloy
Aluminum alloys are typically used in low-power transformers. Due to their lower price, while losses and temperature rise are slightly higher than pure copper, they are more durable under light loads.
Core Materials
1. Silicon Steel Plate
Silicon steel plate is the most common core material for dry-type transformers. Its low resistivity and high permeability effectively reduce iron losses and eddy current losses. Simultaneously, silicon steel plate has good permeability, allowing for better control of magnetic flux, thereby improving overall efficiency.
2. Aluminum Alloy Material
Aluminum alloy materials fall between silicon steel plates and stainless steel in terms of price and performance. Its permeability is lower than silicon steel plates, but in some special applications, such as marine environments, high-humidity environments, and chemically corrosive environments, aluminum alloy materials perform better.
3. Stainless Steel
Stainless steel not only possesses excellent corrosion resistance, but its temperature coefficient is also near zero, meeting the standards for use at higher temperatures. However, due to its high price, it is typically used only in some high-end transformers.
Shell Materials
1. Carbon Steel
Carbon steel, as a basic shell material, has high strength and hardness and is one of the commonly used materials in transformer manufacturing.
2. Stainless Steel
Due to its corrosion resistance and good heat resistance, stainless steel is used as the shell material for many transformers used in very harsh environments.
3. Aluminum Alloy
Aluminum alloys not only have advantages such as being lightweight and corrosion-resistant, but also possess excellent thermal and electrical conductivity, therefore they are often used in the manufacture of high-speed transformers and high-power transformers.
