7 Calculate the expected secondary and primary voltage and currents for this

# 7 calculate the expected secondary and primary

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7. Calculate the expected secondary and primary voltage and currents for this load. V secondary theory = ____37.8 mV _____ I secondary theory = ___804.3 µA ___ I primary theory = ____94.6 µA ____ V primary theory = ___321 mV _____ V S = V P (N S ÷ N P ) = 0.321 V (1 ÷ 8.5) = 0.321 V * 0.0377647059 = 37.8 mV I S = V S ÷ R = 37.8 mV ÷ 47 Ω = 0.0008042553191 = 804.3 µA I P = I S (N S ÷ N P ) = 804.3 µA (1 ÷ 8.5) = 0.0008043 A * 0.1176470588 = 0.00009461827284 A = 94.6 µA 8. Measure the transformer secondary voltage and current. V secondary = ___29 mV ____ I secondary = ___510 µA ___ 9. Measure the primary voltage and current. I primary = ___150 µA_____ V primary = _____320 mV _____ Did the measured values correspond with the theoretical ones? 4
ECT 125 Week 7 iLab #1 Name:________________________ The calculated and measured values were not very similar, I believe that this is in part because of my multi meters inability to measure such a small value as 804 micro Amps.What would happen if the input frequency were doubled? 5

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• Spring '11
• V
• primary voltage, transformer turns ratio, Vsecondary simualted