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Toroidal Inductor

Description

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 offer small size, less leakage inductance and lower electromagnetic interference (EMI).

Where are Toroidal Inductors found?

  • Switch mode power supplies.
  • Filter 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.

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