A transformer is delivering power to a 300-? resistive load. To achieve the desired power transfer, the turns ratio is chosen so that the resistive load referred to the primary is 7,500 ?. The parameter values, referred to the secondary winding, are:
r1 = 20 ? L1 = 1.0 mH Lm = 25 mH
r2 = 20 ? L2 = 1.0 mH
Core losses are negligible.
Find:
a. Determine the turns ratio.
b. Determine the input voltage, current, and power and the efficiency when this transformer is delivering 12 W to the 300-? load at a frequency f = 10,000/2? Hz.
Assumptions:
Core losses are negligible.
Analysis:
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