Transformer Measurements

Coupled Model

Auto Model

T68-6 20T Auto Transformer

T68-6 20T Transformer


Table 1 - Transformer Inductance Values
ValueL uH
L1.767
L21.9921
Laid L1 + L24.5226
Lopp L1 - L2.9321

The formulas for Series-adding Series-opposing method are:

M = (Laid - Lopp) / 4
k = M / SQRT(L1 * L2)

M = (4.5226 - .9321) / 4 = .898
k = .898 / SQRT(.767 * 1.9921) = 0.726

SimSmith

T80-2 20T Transformer and Auto

SimSmith 14.3 T80-2 20T Transformer, with TP, and Auto