Silicon steel transformer cores offer higher power capacity and superior efficiency.

During operation, the higher the power rating of a silicon steel transformer core, the more suitable it is to install separate coils on both sides of the core. This allows the total number of coil turns to be distributed across two separate bobbins, thereby reducing the average turn length of each bobbin and decreasing the copper losses in the coils.

For silicon steel transformer cores, winding two symmetrical coils on separate bobbins achieves perfect symmetry. Compared to standard core-type transformers, transformers with four-legged silicon steel cores are shorter in height but wider in width. Additionally, because the coils are mounted in the center of the silicon steel core with an external magnetic path, they exhibit low magnetic flux leakage and minimal interference with the surrounding environment. In contrast, in standard core-type transformers where all coils are wound on a single bobbin, the bobbin is thicker, resulting in a longer average turn length and higher copper losses.

Silicon steel transformer cores are characterized by their compact size, lightweight, and high efficiency. From an installation perspective, shell-type (also known as Japanese-type) silicon steel cores have the distinct advantage of placing both primary and secondary coils on the same bobbin, which yields a higher window space factor. The silicon steel core acts as a protective shell for the windings, making them less susceptible to mechanical damage, while also providing a larger heat dissipation area and reducing magnetic field radiation. However, this design does have a relatively high primary-to-secondary leakage inductance and is more susceptible to external magnetic field interference.