Planar Open-type Folded Cores

The planar open-type folded cores feature a structure that is easy to transport and assemble on site. The core leaves the factory in a folded state. It can be unfolded and placed around the coils at the installation site. Then it is closed into its final shape. This design is ideal for sites with limited space. It also makes future maintenance and repairs easier. We use high-permeability grain-oriented silicon steel coils from Baowu and Ansteel. Our process ensures that the magnetic performance at the folded area is not affected by the bending operation. Our planar open-type folded cores offer you convenience without compromising quality.

Our company holds 3 invention patents and 19 utility model patents. Some of these patents directly cover the forming process and positioning tools for folded cores. These patented technologies help us achieve precise shaping of the open-folded sections. They also minimize magnetic resistance at the joint after closing. Our CNC shearing lines cut the silicon steel sheets first. Then we use specialized bending equipment for the folding operation. Our experienced technicians perform each step with care. They ensure that the folding angle and dimensions of every core match your drawings. Our planar open-type folded cores are made with advanced technology.

Applications and Customization

These folded cores are mainly used in single-phase distribution transformers, dry-type transformers, and reactors. The capacity and voltage are fully customized to your needs. Because this core structure is special, we confirm the folding method and closed dimensions with you before production. Our designers can work backward from your coil dimensions. They calculate the required window size and yoke height to ensure a perfect match. This two-way verification process reduces the risk of rework during on-site assembly. Our planar open-type folded cores are designed to fit perfectly.

Thorough Inspection of Folded Areas

In our quality inspection, we check not only the regular dimensions and appearance. We also examine the folded areas for cracks or peeling in the coating. Damaged coating during folding can affect the inter-lamination insulation. We use special tools to magnify and test the insulation of the folded sections. For shipping, we design special fixtures and cushioning packaging to keep the core stable. This prevents accidental unfolding or deformation during transit. We work hard to keep every folded core in perfect condition from factory to installation.