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Transcript
A more âcircuitsâ way of understanding the dots is [1, pg. 215] ï· If the two currents I1 and I2 are either both entering or both leaving the dotted terminals of the coils, then the signs of the mutual terms are the same as the signs of the self-terms. ï· If one current is entering and the other is leaving the dotted terminals, then the signs of the mutual terms are opposite to the signs of the self-terms. One other essential idea is to remember that a self-induced voltage across an inductor is positive at the terminal into which the current enters. The voltages E1 and E2 result from the composition of self-induced voltage and mutual induced voltage in each coil. That is, (a) E1 ï½ L1 I1 ï MI 2 (b) E2 ï½ ï L2 I 2 ï« MI1 2
