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Impedance Matching With Transformers
19 questions By Tony R. Kuphaldt
Page 7
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Question 19 of 19
An unloaded power transformer draws a primary current of 85 mA from its 240 volt, 60 Hz source. Neglecting any power losses, calculate the inductance of the primary winding. Also, calculate the inductance of the secondary winding given a step-down voltage ratio of 8:1.
Lprimary = Lsecondary =
Reveal answerLprimary = 7.49 H Lsecondary = 117 mH
Notes:Ask your students to describe the mathematical relationship between winding turns ratio and inductance ratio.
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