| Abstract |
A new discrete-time model for pulse-width
modulated (PWM) converters operating in the discontinuous
conduction mode (DCM) which leads to the exact discretetime
mathematical representation of the averaged values of
the output signal is proposed.
This model can also provide the averaged values of
other internal signals with little increase in simulation
time. The use of piecewise linear (PL) iteration method
dramatically reduces the simulation time, while introducing
a little simulation approximation. It is compared to other
existing models with respect to accuracy and simulation
speed through a numerical example of boost converter. This
method gives the exact one-cycle-average (OCA) values of
signals at switching instants if PL iteration is not used and,
by far, more accurate than other methods if PL iteration is
not used. Numerical simulations demonstrate the superiority
of the proposed method in terms of accuracy and speed. |
