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Choosing Proper Toroid Cores

It is not uncommon to become easily confused when using and buying a toroid. If you have not worked extensively with toroidal transformer and inductors, it is possible to get confused with practical aspects that are directly related to the devices. We want to go over a few pointers and tips to try and help with your next project. The article will focus on day-to-day questions that a toroid user typically has.


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First, it is essential to understand why using a toroid is more appropriate, at times, than using slug-tuned and air-cores. One main reason they are used is the cost because toroids are more affordable than the two other types. Another common reason toroids are used is because they have self-shielding properties because of being formed as closed, 360-degree circles. Radiation from coils and transformers is less than solenoids that use a slug or air cores. Toroids are also compact, more so than their counterparts, which means they easily fit into most existing fittings.

When looking at different cores, a person must choose between ferrite and powdered iron. There is no simple answer for which one to use, and so it depends on the specific needs of each user. Cores made from powdered-iron are much less likely to saturate at designated power levels. These cores require more turns for a given inductance, and a large number of turns can affect accurate performance. Both ferrite and powdered cores are rated as optimum Q versus operating frequencies.


For more information on core types, materials, and transformer winding give our professional team a call. We know toroid core winding and want to help ensure you buy and use the best types for your specific applications.


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