A new operational mode for diode-clamped multilevel inverters termed quasi two-level operation is proposed. Such operation aims to avoid the imbalance problem of the dc-link capacitors for multilevel inverters with more than three levels and reduces the dc-link capacitance without introducing any significant voltage ripple at the dc-link nodes. The proposed operation can be generalized for any number of levels. The validity of the proposed multilevel inverter operational mode is confirmed by simulations and experiments on a prototype five-level diode-clamped inverter.
|Number of pages||12|
|Journal||IEEE Transactions on Industrial Electronics|
|Publication status||Published - Aug 2008|
- multilevel inverter
- neutral point clamped
- power semiconductor devices
- semiconductor diodes