ME305_Fall09_HW2

# ME305_Fall09_HW2 - ME 305 Fall-2009 Asif Sabanovic HW#2 Due Nov 13 2009 17:00 PM Part-I This problem is intended as an introduction to operation of

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ME 305 Fall-2009 Due Nov. 13, 2009 Asif Sabanovic 17:00 PM HW#2 Part-I This problem is intended as an introduction to operation of electrical circuits with switching elements. The example you will be analyzing is so called Buck DC െ DC converter (Fig.1). You will be analyzing fundamentals of its operation, assumptions usually made and practical limitations. Fig 1. Structure of the Buck DC-DC converter Switch S periodically stays in position 1 for interval ܦܶ , and in position 2 for interval ሺ1െܦሻܶ . D is defined as duty ratio and ൌ݂ is switching frequency. 1) Let ܥൌ0 ; a) From the mathematical description of the circuit, determine EXACTLY the maximal ሺܫ ௠௔௫ and minimal ሺܫ ௠௜௡ values of the inductor current in the

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b) By assuming that ܴܮ ⁄ ا݂ in your answer to part a, find the average inductor current ܫ and determine an approximation of the inductor current ripple ∆ܫ
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## This note was uploaded on 01/06/2010 for the course ELECTRONIC me 305 taught by Professor Asıfşabanovic during the Spring '09 term at Sabancı University.

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ME305_Fall09_HW2 - ME 305 Fall-2009 Asif Sabanovic HW#2 Due Nov 13 2009 17:00 PM Part-I This problem is intended as an introduction to operation of

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