2Taufiq J A. Advance Inverter Drvies for Traction[ A ]. EPE Conference Record, 1993,5:224 - 228.
3Patel H S, Hoft R G. General Technique of Harmonic Elimination and Voltage Control in Thyristor Inverter: Part 1-Harmonic Elimination [ J ]. IEEE Trans on IA,1973,9(3) :301 -317.
4Patel H S, Hoft R G. General Technique of Harmonic Elimination and Voltage Control in Thyristor Inverter : Part 2-Voltage Control Technique[ J ]. IEEE Trans on IA,1974,10(5) :666 -673.
5Nabae A,Takahashi I,Akagi H. A New Neutral -Point -Clamped PWM Inverter,IEEE Trans. On Industry Application[J]. 1981,17(5) :518 -5Z3.
6Tolbert L M, Peng F Z, Habetler T G. Multilevel converters for large electric drives [J]. IEEE Trans on Ind Appl, 1999, 35(1): 36-43.
7Nabae A, Takahashi I, Akagi H. A new neutral pointed clamped PWM inverter [J]. IEEE Trans on Ind Appl, 1981, IA17 (5): 518-523.
8Steimer P K, Steinke J K, Gruning H E. A reliable, interface-friendly medium voltage drive based on the robust IGCT and DTC technologies [A]. IEEE IAS Annual Meeting [C]. Phoenix, Arizona: IEEE Press, 1999. 1505-1512.
9Sommer R, Mertens A, Griggs M, et al. New medium voltage drive system using three level neutral point clamped inverter with high voltage IGBT [A]. IEEE IAS Annual Meeting [C]. Phoenix, Arizona: IEEE Press, 1999. 1513- 1519.
10Escalante M F, Vannier J C, Arzande A. Flying capacitror multilevel inverters and DTC motor drive applications [J]. IEEE Trans On Ind Electronics, 2002, 49(4): 809 - 815.
