A distinguishing method of open-circuit IGBT of three-level NPC inverterChinese Full Text
QIU Shiguang;LI Mei;Department of Electrical Engineering,Binzhou University;Research Center of Automatic Control,Binzhou University;Department of Economics Management,Binzhou University;
Abstract: For problem of large calculated amount of existing distinguishing method of open-circuit IGBT of three-level NPC inverter,all kinds of open-circuit states of IGBT were simulated,and the causes of bus neutral-point voltage deviation were analyzed,then a simple method to distinguish the open-circuit IGBT was proposed.The method achieves distinguishing of open-circuit IGBT by detecting bus neutralpoint voltage and three-phase output voltage of inverter,which needs no extra hardware.The simulation results verify effectiveness of the method.
Keywords：
three-level NPC inverter; open-circuit IGBT; power switch device; neutral-point voltage balance;
- DOI：
10.13272/j.issn.1671-251x.2014.09.023
- Series：
- Subject：
- Classification Code：
TM464
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