Toroidal Inductor

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.