| 摘要 |
<p>An inverter for converting a DC input voltage to an AC output voltage with an H-bridge is provided. A storage choke circuit is provided between the H-bridge and output-side AC voltage terminals. The storage choke circuit includes a freewheeling path with a freewheeling diode for commutating the current after a turn-off process of a semiconductor switch of the H-bridge. In this arrangement, each switching semiconductor switch is coupled to a resonant circuit which contains capacitive resonant elements and inductive resonant elements. The freewheeling path includes first and second freewheeling diodes connected in parallel, wherein the parallel circuit is connected in series with the inductive resonant elements and the second freewheeling diode is connected in series with capacitive freewheeling elements which are charged to a corresponding voltage at the start of a freewheeling phase as elements of the resonant circuit for zero voltage switching of the second freewheeling diode.</p> |
