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What is the Difference Between a Toroid and Solenoid

Knowing the differences between a toroid and a solenoid helps you create better and more efficient electronic devices. Each transformer type has pros and cons, and so they should not be used interchangeably. Picking the right transformer for your application is an utter necessity. Below, we want to go over some of the main differences between these core types.Toroids

Solenoids are made from a coil of wire that takes on magnetic properties as electricity passes through. Solenoid wires are wrapped around a metallic core. A toroid has a similar shape to a solenoid except that a toroid is bent into a ring shape. The doughnut shape is then wound with wire. Toroids are often constructed from powdered iron or ferrite.

A solenoid has a cylindrical shape, and magnetic fields form outside of the core. On the inside, magnetic fields are uniform. A toroid has a circular shape and its magnetic field forms inside the core.

Although there is a time to use solenoids, toroids are often chosen by electrical engineers because of all the benefits they offer.

Because of a toroids ring shape, the overall escape of magnetic flux is greatly reduced. The core is a closed-loop, which means that flux cannot escape from ends or corners. Compared to similarly powered transformers, a toroid is often thought to have less EMI and greater efficiency.

Toroidal core winding is distributed around the core’s entirety, creating better utilization of the core material. It also creates better coupling between separate windings.


It would help if you did not hesitate to give our team a call for more information on choosing between custom toroidal transformers and solenoids.

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