Comparative Analysis of 72 Flyback Transformers on 5τ Non-linear Battery
with Loss Functions - Part I
Abstract
This is a three part series paper, where the novel idea of representing
flyback transformer losses as loss functions has been presented with
scientific proof.Thirteen calculations for each transformer have been
tabulated and used to derive mathematical loss function using hyperbolic
secant spline interpolation which is subjected to Lyapunov method to
predict core saturation and instability in the control loop. For
scientific validity, 72 working transformers at thirty-six wattage’s
which are being internationally used, have been examined to check,
whether such proposition is valid or not.The definiteness of
matrix,singular value decomposition,Lyapunov exponents are also
tabulated. Then each of these transformers are simulated with
non-linearies of Li-ion battery namely state of charge (SoC),
self-discharge resistance, temperature-dependent leakage resistance,five
time-constant dynamics, deterioration of battery performance over
repeated charge and discharge cycles. The coefficients in the
Jiles-Atherton model have been altered with fractional perturbations to
obtain hysteresis curves.Various interesting comparisons in Bm,Bp,AC
flux densities, effect on varying the coefficients in JA, residual
errors, Lyapunov exponents, switching frequency vs MOSFET and
transformer losses, reflected voltages, are tabulated and plotted.