toroid iso

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Popular Core Materials

Without a core, motors and transformers do not function properly. The core used to build step-up/step-down transformers is typically composed of several materials. Materials are chosen to fulfill the needs of specific applications. Cores directly affect the function of transformers. The geometry and size of cores dictate the voltage, power, and current the transformer provides. Cores are considered the conduit for the magnetic flux that overflows from AC signals that are placed on the primary coil. The core flux transfers energy from a primary coil to a secondary one. To do this effectively, transformers feature amorphous laminated steel.


The three most common types of steel cores used in magnetic transformers are:

Solid Iron/Steel: steel and solid annealed iron is a common material for toroid cores because they offer strong magnetic fields. It is essential to be mindful that the material can produce eddy currents that can make a core ineffective.

Laminated Silicon Alloy: Custom coil winding is common for these cores. These for work best for electrical transformers needing 50/60/400Hz. Engineers use this material when they need efficient magnetic propagation that also has reduced heat dissipation and reduced eddy currents.

Amorphous Steel: this material is used for functions that operate between high and mid frequencies. When using this type of steel, users experience a reduced flow of eddy currents at the frequencies mentioned above.


For more information on toroids and core materials, you should not hesitate to give our team a call. We also do coil winding.

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