The Inductor - Page 1 of 3 Memorandum For: ELCT 301 From:...

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Page 1 of 3 Memorandum USC Campus Columbia SC 29205 March 29, 2008 For : ELCT 301 From : Jared Tucker Email : tuckerjj@mailbox.sc.edu Subject : Inductor Design ______________________________________________________________________ The purpose of this lab was to design a 100μH inductor with a 3A current capability using a 3F ferrite ceramic core whose operation frequency is 100 kHz. In the prelab, I had to calculate the wire gauge to withstand the frequency and current specifications. I then proceeded to calculate the number of turns I would need to achieve an inductance of 100μH. I then calculated the reluctance of the air gap, reluctance of the material as well as the AC and DC resistance. For all calculations refer to Appendix I. Many of the calculations came from [1]. Based on calculations (7 and 8), I found the reluctance of the air gap to be significantly higher than the reluctance of the material, by at least 2 orders of magnitude. Therefore I was able to neglect the reluctance of the material. Based on calculations (9,10) I found the AC resistance to be higher than the DC resistance. This makes sense because in DC steady state, an inductor appears as a short circuit which means it contains very little resistance. However, in AC, the inductor would have a
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The Inductor - Page 1 of 3 Memorandum For: ELCT 301 From:...

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