| 摘要 |
A multilevel converter (100) is disclosed. The multilevel converter (100) comprises a first switching branch (101) connected between a positive DC-link terminal (P) and an AC output terminal (a) and comprising series-connected first and second switching elements (S1, S2), a second switching branch (102) connected between the AC output terminal (a) and a negative DC-link terminal (N) and comprising series-connected third and fourth switching elements (S3, S4), a third switching branch (103) connected between a DC-link neutral point (M) and a connection point (1) of the first and the second switching elements (S1, S2), a fourth switching branch (104) connected between the DC-link neutral point (M) and a connection point (2) of the third and the fourth switching elements (S3, S4), the fourth switching branch (104) being completely independent from the third switching branch (103), and a flying capacitor (Cf) connected between the connection point (1) of the first and the second switching elements (S1, S2) and the connection point (2) of the third and the fourth switching elements (S3, S4). |
