DocumentCode :
2270681
Title :
General analysis on imbalanced voltage of DC capacitors in NPC three-level inverter
Author :
Cai, Kai ; Liu, Bin ; Xu, Zhengxi ; Kang, Yong ; Cheng, Shanmei
Author_Institution :
Wuhan Second Ship Design & Res. Inst., Wuhan, China
fYear :
2011
fDate :
20-23 Aug. 2011
Firstpage :
1
Lastpage :
6
Abstract :
As Neutral-Point-Clamped topology has been widely studied and applied in three-level inverter, owing to its simple structure and low cost, balance of DC capacitors´ voltage is one of the key issues involving operation safety and output performance in this topology type. With detailedly discussing causes and impacts of imbalance of neutral-point level in NPC three-level inverter, a comprehensive analysis is conducted on the imbalance characteristics. A tight connection is revealed through the analyzing process, as voltage fluctuation of the DC capacitor and the union combined with both modulation index and power factor. Strong guidance for circuit design and control scheme of the NPC type inverter could be given according to research results in this paper. Simulation results on the model built in Matlab verify the analysis results above.
Keywords :
capacitors; invertors; power factor; DC capacitor balancing; Matlab analysis; NPC three-level inverter; modulation index; neutral-point-clamped three-level inverter; power factor; voltage fluctuation; voltage imbalancing; Capacitors; Fluctuations; Indium phosphide; Inverters; Mathematical model; Pulse width modulation; Topology;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electrical Machines and Systems (ICEMS), 2011 International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4577-1044-5
Type :
conf
DOI :
10.1109/ICEMS.2011.6073334
Filename :
6073334
Link To Document :
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