Table 5.
| 2-Level | 3-Level NPC | 3-Level Vienna | |
|---|---|---|---|
| THD of output current | High | Very Low | Very low |
| Peak voltage stress on active and passive devices | High | Low | Low |
| Switching loss | High | Low | Mid |
| Power density | Low | Higher | High |
| Conduction loss | Low loss | Very- High loss | High loss |
| Efficiency | Low ɳ | Very- high ɳ | High ɳ |
| Cost | Low cost | High cost | Moderate cost |
| Control | Easy | Moderate | Moderate |
| Input inductor size | Large | Low | Low |
| Thermal management | Vast | Challenging due to unsymmetrical loss distribution | Mild |
| Bidirectional | Yes | Yes | No |