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Single Layer Coil Design Chart |
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Single layer coil design charts (aka nomographs) are a dime a dozen on the Internet. Here is RF Cafe's 0.083¢ contribution. A couple examples of usage are included. You're welcome.
Single Layer Coil Design Chart This chart can be used to find inductance of a coil when dimensions and number of turns are known, or to find specifications to give a desired Inductance. Draw a line between either T and L or d and l/d, whichever are both known. Draw a second line between remaining known quantity and point of intersection of first line and unmarked vertical line. Extend second line to scale for unknown quantity and read answer. EXAMPLE A: We have a coil 5" in diameter, 19 turns, 37 turns per inch, and wish to find the inductance. l = 19/37" = .52"; l/d = .52/5 = .104. Draw a line between d=5 and l/d = .104. Draw a second line from T = 37 through the intersection point to the L scale. Read the answer, 100 microhenries. EXAMPLE B: We require the number of turns of a coil 5" in diameter, wound 37 turns per inch, to give 100 microhenries. Draw a line between T = 37 and L = 100. Draw a second line from d = 5, through the intersection point, to the l/d scale, and read l/d = .104. Then l = 5 x .104 = .52 Inches. The number of turns is .52 x 37 = 19, approximately.
Posted April 16, 2013 |
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| About RF Cafe | |
 Copyright: 1996 - 2018 Webmaster: Kirt Blattenberger, BSEE - KB3UON |
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RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The Internet was still largely an unknown entity at the time and not much was available in the form of WYSIWYG ... All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged. My Hobby Website: AirplanesAndRockets.com
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