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COMMONLY USED MAGNETIC CORE STRUCTURES Straight cylindrical rod Most commonly made of the ferrite or similar material, and used in Radio s especially for tuning an Inductor . The rod sits in the middle of the coil and small adjustments of the rod position will fine tune the Inductance . Often the rod is Thread ed to allow adjustment with a screwdriver. In radio circuits, a dob of Wax or Resin is used once the inductor has been tuned to prevent the core from moving. The presence of the high Permeability core increases the Inductance but the field must still spread into the Air at the ends of the rod. The path through the air ensures that the Inductor remains Linear . In this type of inductor Radiation occurs at the end of the rod and Electromagnetic Interference may be a problem in some circumstances. Single "I" core Like a cylindrical rod but square, rarely used on its own. "C" or "U" core ''U'' and ''C''-shaped cores are the simplest solution to form a closed magnetic circuit, when used alongside a ''I'' or another ''C'' or ''U' core. |
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