| 摘要 |
The invention relates to a circuit arrangement for a converter ( 1 ) with switches (S 1 , S 2 ) for chopping a DC voltage U 1 into a chopped DC voltage U 3 , comprising control means for controlling the switch-on times of the switches (S 1 , S 2 ), in which switch-on times of the switches (S 1 , S 2 ) alternate with each other and are separated from each other by dead-time phases Ttot, and circuit elements comprising a resonant circuit having at least one capacitor (Cr) and at least one coil (Lr) for convening the chopped DC voltage U 3 into an output voltage U 2 . To ensure a reliable and interference-free ZVS operation of such a circuit, a circuit arrangement and a method of operating such a circuit arrangement are proposed in which a value for the energy/charge remaining in the resonant circuit for switching the switch in the inductive mode of operation is determined and compared with a threshold value by means of a comparator ( 24 ), and in which the switches (S 1 , S 2 ) are controlled in dependence upon the comparison result. |
