HW 2 2011 - Q1 Why the core in transformer is constructed...

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Q1 Why the core in transformer is constructed by thin lamination (layer)? What happen when large gap exist in the core? Q2 What kind of current generates the main flux in no load case? What is the difference between the main flux and flux leakage in terms of magnetic path, magnitude, the relationship relative to the secondary side and functions? Q 3 What is the relationship among the main flux, applied voltage and frequency? How about for the relationship between excitation current and main flux? A transformer is designed for: 50Hz, rated voltage 220/110V. if the primary side is connected to 50 Hz, 380V (or 110V) voltage source, how do the main flux and excitation current change? How about if it is connected to 220V 60Hz voltage source? How large are the open voltage at secondary side in the above two cases? Q6. State the physical meaning for Xm,X1 and X2. Q7.
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This note was uploaded on 02/27/2012 for the course ELEC 232 taught by Professor Terry during the Spring '12 term at University of Macau.

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HW 2 2011 - Q1 Why the core in transformer is constructed...

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