CONVERTER WITH RESONANT CIRCUIT ELEMENTS

摘要

The invention relates to a converter comprising resonant circuit elements (S1, S2) for chopping a DC voltage (U1), in which switch-on phases of the circuit elements (S1, S2) are alternating, and comprising a circuit assembly (5) with resonant circuit elements (Cr, Lr) which is used for processing the chopped DC voltage (U3) and for producing an output voltage (U2). As a type of converter load monitoring that can be changed with the least possible circuit expenditure and the least possible measuring losses, there is proposed to compare in a dead time phase (Ttot) before a circuit element is switched on the voltage (US1) or (US2) applied to the circuit element with a threshold (Uth) and ascertain from this comparison result whether an inductive or capacitive converter load is present. As a second embodiment there is proposed to determine during a dead time phase (Ttot) the derived value (dUS1/dt) of the voltage (US1) present on the circuit element and ascertain with the determined derived value (dUS1/dt) whether an inductive or capacitive converter load is present.