TRANSFORMERS:THEORY OF OPERATION OF REAL SINGLE-PHASE TRANSFORMERS

THEORY OF OPERATION OF REAL SINGLE-PHASE TRANSFORMERS

Figure 3.6 illustrates a transformer consisting of two conductors wrapped around a trans- former core. Faraday’s law describes the basis of transformer operation:

where A is the flux linkage in the coil across which the voltage is being induced. Flux link- age A is the sum of the flux passing through each turn in the coil added over all coil turns:

The total flux linkage through a coil is not N (N is the number of turns). This is so because the flux passing through each turn of a coil is slightly different from the flux in the

neighboring turns. An average flux per turn is defined. If A is the total flux linkage in all the turns of the coils, the average flux per turn is

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