| Title |
Simple Compensation Method of Unclamped Switch Voltages in a Three-Level NPC Inverter |
| Authors |
Kyun-Seon Ji ; Sung-Tak Jou ; Hae-Gwang Jeong ; Kyo-Beum Lee |
| DOI |
10.6113/TKPE/2014.19.3.257 |
| Keywords |
neutral point clamped (NPC); three-level inverter; clamping voltage; compensation method |
| Abstract |
This paper proposes a simple compensation method for switches of the unclamped voltage in the three-level NPC inverter. Voltages of inner-switches can be unclamped in the three-level NPC (neutral point clamped) inverter. It can cause the problem of the switch fault accident. By adding a capacitor, switches of the unclamped voltage can be clamped. Through the analysis of the circuit, the reason behind switches being unclamped was verified which leads to the solution method that designs a compensation capacitor. The proposed method was validated through the simulation and experimental results. |