Thermal Distribution and Dynamic Junction Temperature Calculation of IGBT Power Modules for Wind Turbine Converters Considering the Influence of Stray Inductances
Li Hui1, Hu Yu1, Wang Kun1, Quan Ruikun1, Xia Guisen2
1. State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing 400044 China;; 2. Chongqing KK-QIANWEI Wind Power Equipment Co. Ltd Chongqing 401121 China
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.
李辉, 胡玉, 王坤, 全瑞坤, 夏桂森. 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[J]. 电工技术学报, 2019, 34(20): 4242-4250.
Li Hui, Hu Yu, Wang Kun, Quan Ruikun, Xia Guisen. Thermal Distribution and Dynamic Junction Temperature Calculation of IGBT Power Modules for Wind Turbine Converters Considering the Influence of Stray Inductances. Transactions of China Electrotechnical Society, 2019, 34(20): 4242-4250.
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2019, Vol. 34 
