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Toroidal Inductor – Custom Built

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Butler Winding designs and manufactures Custom Toroidal Inductors for a variety of power supply and power conversion applications. A Toroidal inductor is an inductor that is designed on a doughnut shaped core. Toroidal inductors btn_toroidal_inductor_formoffer small size, less leakage inductance and lower electromagnetic interference (EMI).

Where are Toroidal Inductors found?

  • Switch mode power supplies.
  • btn_toroidal_inductor_theoryFilter applications.
  • Electromagnetic Interference (EMI) sensitive circuits.

Design upper limits of a Toroidal Inductors:

  • Typical minimum requirements to be specified for a Toroidal inductor design are:
    • No load inductance in uH
    • Full load inductance in uH
    • DC Current in Amperes
    • AC Current in Amperes peak to peak
    • Operating frequency is needed for core calculations and wire sizing
  • Core material is selected for the known operating frequency or frequencies.
  • Other Toroidal inductor design considerations are space limitations and mounting technique.
  • Lead terminations are also specified through the design of a Toroidal inductor.

A Toroidal Inductor design may vary widely in terms of power rating, inductance, voltage level (low to high), operating frequency, size, impedance, bandwidth (frequency response), packaging, winding capacitance, and other parameters.

Toroidal Inductor Photo Gallery
Toroid Inductor Winding Video
Power Inductor Spec

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