What Are The Advantages Of Using A Toroidal Transformer?

Johnson Electric Coil Company

There are many different transformer options on the market, and there are various trade-offs from one to the next: Size, shape, weight, cost, efficiency, power range, and the application’s circuit characteristics are all factors to be considered. Especially where available space is limited and/or minimizing weight is critical, the choice of a toroidal transformer offers several benefits or advantages over other core configurations. A toroid design is particularly suitable for high frequency, low current, low voltage applications.


A common advantage for OEMs is the comparatively light weight design that a toroidal core affords. Not only are toroids typically constructed of high-performance electrical grade steel, but also the shape allows for compact winding that loops through the core’s center as it is wound around the periphery, minimizing losses and maximizing output power and efficiency.

The toroid’s lightweight, compact nature can be critical in electronic equipment and machinery, particularly those designed to be mobile.

Low Electromagnetic Field Radiation

The toroidal design is also ideal in applications where the transformer’s leakage inductance and electromagnetic interference or compatibility are concerns.

Typically, toroid transformers produce significantly less stray magnetic energy, which means less risk of the transformer’s magnetic field interfering with other components within the system. And with the magnetic energy flux largely contained due to the configuration of windings and core, there is limited leakage inductance as well.

Low Noise

Due to the toroid’s “tape-wound” core, compact design, and efficient use of space, the constant hum often produced by other types of transformers in operation is also reduced.


Finally, a toroidal transformer can draw power from almost any power source application, further streamlining design possibilities and potential.

For more information about toroidal transformers, call us at 715.627.4367.

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