QIU Shiguang, LI Mei. A distinguishing method of open-circuit IGBT of three-level NPC inverter[J]. Journal of Mine Automation, 2014, 40(9): 99-102. DOI: 10.13272/j.issn.1671-251x.2014.09.023
Citation: QIU Shiguang, LI Mei. A distinguishing method of open-circuit IGBT of three-level NPC inverter[J]. Journal of Mine Automation, 2014, 40(9): 99-102. DOI: 10.13272/j.issn.1671-251x.2014.09.023

A distinguishing method of open-circuit IGBT of three-level NPC inverter

  • 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 neutral-point voltage and three-phase output voltage of inverter, which needs no extra hardware. The simulation results verify effectiveness of the method.
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