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| Research on IGCT-NPC/H Bridge Converter Commutation Process |
| Kong Dehong1 , Li Chongjian1 , Zhu Chunyi1,2 , Wang Chengsheng1,2 , Yang Qiongtao1,2 |
| 1. Automation Research and Design Institute of Metallurgical Industry Beijing 100070 China; 2. Hybrid Process Industry Automation System and Equipment Technology State Key Lab Beijing 100071 China |
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Abstract The five-level NPC/H bridge converter is evolved from the three-level NPC one. It has the advantages of small output voltage harmonic content, high power capacity and being easy to implement modular design, which is applicable to the high-voltage high-power adjustable speed control system. In this paper, the topology characteristics of a single-phase NPC/H converter bridge is analyzed, the work principle, the commutation process and the mathematical model of the NPC/H converter are investigated, and the influence of the stray inductance on the commutation process and the over voltage of IGCT is analized. The above analysis is conformed by simulation results.
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Received: 20 September 2012
Published: 05 November 2014
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2014, Vol. 29 
