Determine the efficiency of the transformer if the voltage at the ends of the primary winding

| July 22, 2021 | education

Determine the efficiency of the transformer if the voltage at the ends of the primary winding of the transformer is 220 V and the current in it is 2 A, and the voltage at the ends of the secondary winding is 22 V and the current in it is 15 A.

U1 = 220 V.

I1 = 2 A.

U2 = 22 V.

I2 = 15 A.

Efficiency -?

The efficiency factor The efficiency for a transformer is determined by the formula: efficiency = N2 * 100% / N1, where N1 is the current power in the primary winding of the transformer, N2 is the current power in the secondary winding of the transformer.

The current power N is determined by the formula: N = U * I, where U is the current voltage, I is the current in the conductor.

N1 = U1 * I1, N2 = U2 * I2.

The formula for determining the efficiency of the transformer will take the form: efficiency = U2 * I2 * 100% / U1 * I1.

Efficiency = 22 V * 15 A * 100% / 220 V * 2 A = 75%.

Answer: the transformer has an efficiency of 75%.



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