IGBT串联动态均压特性分析与控制

doi:10.19595/j.cnki.1000-6753.tces.170777

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Abstract The direct series connection of multiple insulated gate bipolar transistor (IGBT) is one of the effective approaches to realize high voltage power conversion, and the dynamic voltage sharing between series IGBT is the key to its safe and reliable operation. This article is based on the test and analysis of the series connected field stop IGBT (FS-IGBT). The relationship between the turn-off delay and the degree of voltage un-balance is found. A control strategy for dynamic voltage sharing is proposed, which is responsive to series IGBT characteristics and adjusts the delay time (or lead time) of the IGBT switches in real-time. The time adjustment is calculated by the two-section type regulation algorithm, i.e., the square proportion algorithm realizes regulation rapidity with larger voltage un-balance degree and the proportional algorithm achieves voltage stability with smaller voltage un-balance degree. The time adjustment of each IGBT is introduced into its next IGBT time adjustment to further optimize the regulation speed. The experimental results verify the feasibility and effectiveness of the proposed method.

Key words： IGBT in series series operation characteristic dynamic voltage sharing voltage sharing control

Received: 06 June 2017 Published: 27 July 2018

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TM46

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	Articles by authors
	Ding Shun
	Xing Yan
	Wang Jun
	Hu Haibing

Cite this article:

Ding Shun,Xing Yan,Wang Jun等. Control for Dynamic Voltage-Sharing among Series-Connected IGBTs[J]. Transactions of China Electrotechnical Society, 2018, 33(14): 3194-3201.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.170777 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I14/3194

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