Abstract
Multilevel diode-clamped converters with more than three levels cannot maintain voltage balance in the dc-link capacitors for some operating conditions due to the existence of dc currents in the middle points. Since capacitors are either completely charged or discharged for those conditions, this circumstance severely limits practical application of these converters. The limit explored in this paper is that the four-level converter cannot achieve voltage balance. Proper redundant vectors are selected in the space-vector diagram so that a quadratic parameter related to the currents in the middle points is minimized.
| Original language | English |
|---|---|
| Pages (from-to) | 190-196 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Industrial Electronics |
| Volume | 52 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Feb 2005 |
| Externally published | Yes |
ASJC Scopus Subject Areas
- Control and Systems Engineering
- Electrical and Electronic Engineering
Keywords
- Four-level inverter
- Multilevel inverter
- Nearest vectors
- Passive front ends
- Space-vector modulation (SVM)
- Voltage balance