LOAD CHARACTERISTICS AND CONTROL SYSTEM BEHAVIOURAL MODELLING UNDER OPTIMAL TRAJECTORY CONTROL OF SERIES RESONANT DC/DC CONVERTERS

Nikolay Bankov - Tsvetana Grigorova

   The paper presents behavioural modelling of the control system of series resonant DC/DC converters operated above the resonant frequency under "optimal trajectory control" technique. This method predicts the fastest response possible with minimum energy surge in the resonant tank. The steady-state equations described the converter operation above the resonant frequency as a function of the diode trajectory radius and corresponding normalized load characteristics are proposed. They allow evaluating the behaviour of the considered converter when the load is changed strongly during the operation process. Simulation and experimental results are given.

Keywords: resonant DC/DC converters, control system, optimal trajectory control, behavioural modelling

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