| 摘要 |
A converter, adapted to be connected to a three-phase input voltage system (V1, V2, V3), comprising a first terminal (P) and a second terminal (N) of a DC voltage output is presented. It comprises for each phase of the input voltage system, two boost diodes (DB1, DB2, DB3, DB4, DB5, DB6), a switch (S1, S2, S3) and a snubber circuit (1, 2, 3). For each phase, a snubber inductor (L11, L12, L13) in series with each switch (1,2,3) reduces the current rising rate at the turn-on instant. When the switch (1,2,3) is turned-off a capacitor (C12, C13, C22, C23, C32, C33) delays the voltage rising by diverting the current that is circulating through the switch. The invention presents a very efficient converter having only one inductor per snubber circuit, which saves both space and cost. |
