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http://dx.doi.org/10.6113/TKPE.2014.19.3.257

Simple Compensation Method of Unclamped Switch Voltages in a Three-Level NPC Inverter  

Ji, Kyun-Seon (Dept. of Electrical and Computer Eng., Ajou University)
Jou, Sung-Tak (Dept. of Electrical and Computer Eng., Ajou University)
Jeong, Hae-Gwang (HAE Lab., LG Electronics co., Ltd.)
Lee, Kyo-Beum (Dept. of Electrical and Computer Eng., Ajou University)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.19, no.3, 2014 , pp. 257-265 More about this Journal
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.
Keywords
neutral point clamped (NPC); three-level inverter; clamping voltage; compensation method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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