ES100 Tut9.pdf

# ES100 Tut9.pdf - Curtin University of Technology Electrical...

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A. Mansour, ECE - Curtin University, Perth – AUSTRALIA, January 2010 Page 1 of 4 Curtin University of Technology Electrical Systems 100 8 th Tutorial Exercise 1: Definition of the turns ration: Let N pri (respectively N sec ) the number of turns in the primary (respectively secondary) winding a) A transformer primary winding has 100 turns, and the secondary winding has 400 turns. What is the turns ration? b) A certain transformer has a turns ratio of 10. If N pri = 500, what is N sec ? Exercise 2: The transformer in the following figure has a turns ratio of 3. a) If V1 = 120 V is a DC source voltage, what should be the voltage at the secondary, V2 ? b) Let V1 (RMS) = 120 V, find V2 . c) If , find V2. What is the amplitude of V2? Its frequency? Its period? Its peak-to-peak value? Its phase? Its maximum and minimum value? Sketch V2. d) By considering the same source voltage used in the previous question, if the turns ratio has been changed to 4, find V2 . e) If , then find V2 .

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