ECE320_SS09_Exam_2b_solutions

# ECE320_SS09_Exam_2b_solutions - ECE 320 Energy Conversion...

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1 ECE 320: Energy Conversion and Power Electronics Exam 2 March 23, 2009 Prof. Tim Hogan Print your name: Student ID #: Question Score 1 2 3 4 Total Prefixes 10 12 tera T 10 9 giga G 10 6 mega M 10 3 kilo k 10 -3 milli m 10 -6 micro μ 10 -9 nano n 10 -12 pico p 10 -15 femto f 10 -18 atto a This exam is out of 100 points. Read through the exam before starting and feel free to do the easier parts first. Show your work. Careful of units.

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1 Problem #1: Matching & True/False 20 points Match the Property in the left column to the Phrase in the right column by placing the appropriate letter from the Property column in the boxes provided. Each Property can be used any number of times, such that some letters might not be used, while others could be used more than once . (3 points each) Property Phrase A) Autotransformer Single winding transformer. B) Magnetizing Inductance All quantities are expressed as decimal fractions of appropriately chosen base values in this method. C) Leakage Inductance Can be described as a mechanical rectifier in a dc generator. D) Winding Resistance In an equivalent circuit for a transformer, this component accounts for heating of the transformer due to eddy currents (as well as hysteresis, and magnetostriction effects).

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