PreLabtechmemotext

# PreLabtechmemotext - Page 1 of 3 Memorandum October 12,...

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Page 1 of 3 Memorandum October 12, 2011 For : ELCT 301 From : Meredith Thomas Email : thoma242@email.sc.edu Subject : Inductor Design ______________________________________________________________________ The purpose of this lab was to design a 100μH inductor with a 3A current capability using an EFD 30 ferrite ceramic core material for operation frequency at 100 kHz. The maximum flux density used is 0.25T. For the pre-lab, I had to calculate the number of turns I would need to achieve an inductance of 100μH (Equation 6). I then calculated the wire gauge to withstand the frequency and current specifications using the area of the wire and the datasheet (Equation 3-5). Next, I calculated the length of the gap (Equation 7), the reluctance of the air gap as well as the reluctance of the material. Finally, I was to measure the AC and DC resistance of the inductor at 100 kHz and 1 MHz. Using Equations (8) and (10). I found the AC resistance to be higher than the DC resistance by using Equations (12) and (13). This result makes sense because in DC steady state, an inductor appears as a short circuit. Therefore, the inductor contains very little resistance.

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## This note was uploaded on 10/25/2011 for the course ELCT 301 taught by Professor Santi during the Spring '09 term at South Carolina.

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PreLabtechmemotext - Page 1 of 3 Memorandum October 12,...

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