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Question 15.9: Determination of Required Turns Ratio Suppose that we have a...

Determination of Required Turns Ratio
Suppose that we have a 4700-V-rms ac source and we need to deliver 220V rms to a load. Determine the turns ratio N1/N2 of the transformer needed.

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Rearranging Equation 15.51, we have

V_{2\mathrm{rms}}=\frac{N_2}{N_1}V_{1\mathrm{rms}}        (15.51)

\frac{N_1}{N_2}=\frac{V_{1\mathrm{rms}}}{V_{2\mathrm{rms}}}=\frac{4700}{220}=21.36

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