考虑杂散电感影响的风电变流器IGBT功率模块动态结温计算及热分布

doi:10.19595/j.cnki.1000-6753.tces.L80777

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Abstract The loss distribution is different for dynamic non-uniform current between paralleled chips inside insulated gate bipolar transistor (IGBT) module. It is difficult to analyze the internal thermal distribution accurately by traditional junction temperature calculation method. Thus, a dynamic junction temperature calculation method was proposed by considering the influence of the internal stray inductance in IGBT module. Firstly, the IGBT equivalent circuit model with the internal stray inductance was established, and the mechanism of dynamic non-uniform current distribution was demonstrated. Then, the relationship between the turn-on losses and stray inductance parameters was derived. The internal dynamic junction temperature calculation was presented based on the multi-chip electro-thermal coupling effects, and testified by the experiments. Finally, combined with the doubly fed wind turbine control strategy, an electro-thermal decoupling simulation model considering the stray inductance for the wind power converter module was presented and compared with the traditional model. The results show that the proposed model could accurately reflect the average and fluctuation amplitude of junction temperature for each chip inside the IGBT module.

Key words： Doubly-fed wind turbine converter IGBT power module dynamic junction temperature stray inductance thermal stress

Received: 11 July 2018 Published: 30 October 2019

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TM46

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	Li Hui
	Hu Yu
	Wang Kun
	Quan Ruikun
	Xia Guisen

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Li Hui,Hu Yu,Wang Kun等. Thermal Distribution and Dynamic Junction Temperature Calculation of IGBT Power Modules for Wind Turbine Converters Considering the Influence of Stray Inductances[J]. Transactions of China Electrotechnical Society, 2019, 34(20): 4242-4250.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L80777 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I20/4242

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