| Abstract |
A novel structure for a multilevel voltage source inverter (patent pending) is presented. The scheme, which generalizes the well-known NPC five voltage levels inverter, lncludes a capacitive voltage divider, realized by n elementar RC filters and 2n switches for every branch. This structure presents two important advantages: an output voltage harmonic content reduction and the fact that, in every possible switch configuration, each solid state switch has to withstand a maximum voltage equal to 1/n of that the DC link (excluding turn-off overvoltages) without requirements of dynamic voltage sharing at turn-on or turn-off (no devices in series). The schema developed is illustrated, and digital simulatlon results obtained by means of general purpose EMTP program are presented and discussed. |
