Electrical Engineering ⇒ Topic : Series Aiding

Gopal
 
Consider two coils connected in series as shown in Figure. Let L_{1} = inductance of first coil L_{2} = inductance of second coil M = mutual inductance between the two coils Seriesaiding:This is the case when the coils are so arranged that their fluxes *aid each other i.e. in the same direction as shown in Figure (a). Suppose the current is changing at the rate di/dt. The total induced e.m.f. in the circuit will be equal to the sum of e.m.f.s induced in L_{1} and L_{2} plus the mutually induced e.m.f.s, i.e
FIGURE (A) ... in magnitude = (L_{1}+ L_{2} + 2M) di/dt If L_{T} is the total inductance of the circuit, then, L_{T} = L_{1}+ L_{2} + 2M ...fluxes additive  
 
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