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Transformer Efficiency

Transformer Efficiency. The relationship that we derived for the transformer is:. If the transformer is 100% efficient all, ALL of the electrical power generated across the primary winding must be delivered to the secondary winding: As P= IV For a totally efficient transformer P p = P s

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Transformer Efficiency

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  1. Transformer Efficiency

  2. The relationship that we derived for the transformer is:

  3. If the transformer is 100% efficient all, ALL of the electrical power generated across the primary winding must be delivered to the secondary winding: As P= IV For a totally efficient transformer Pp= Ps i.e. IpVp = IsVs

  4. The ratio: Therefore measures the efficiency of the transformer. In practise large power transformers have an Efficiency of around 98%

  5. Question The primary coil of a step down transformer has 5000 turns and the secondary coil has 1000. The primary has 1150V across it. • Calculate the e.m.f. generated in the secondary coil. • The transformer is 90% efficient. Calculate the average current generated in the secondary coil.

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