CAJ | 학술논문

对高空飞行器供油驱动系统在特定负载状态下的IGBT模块结温特性进行研究。高空飞行器对供油驱动系统的高功率密度要求高及环境散热条件差的状况，使得其关键部件IGBT模块在功率裕量与结温控制方面更为严格。根据负载特性精确计算结温，对于在特定散热条件下系统的可靠运行非常重要。运用非稳态导热的Foster集总参数法，分析IGBT模块点热源特性及其他热源对计算影响，建立一种含校正系数的热网络模型，并在短时脉冲过载及输出低频两种特有状态下，对IGBT模块的结温特性进行分析。通过对高空飞行器飞行过程中IGBT模块结温特性的计算，结合仿真软件Semisel的对比分析，验证了建模和分析本文所提方法的有效性。
대고공비행기공유구동계통재특정부재상태하적IGBT모괴결온특성진행연구。고공비행기대공유구동계통적고공솔밀도요구고급배경산열조건차적상황，사득기관건부건IGBT모괴재공솔유량여결온공제방면경위엄격。근거부재특성정학계산결온，대우재특정산열조건하계통적가고운행비상중요。운용비은태도열적Foster집총삼수법，분석IGBT모괴점열원특성급기타열원대계산영향，건립일충함교정계수적열망락모형，병재단시맥충과재급수출저빈량충특유상태하，대IGBT모괴적결온특성진행분석。통과대고공비행기비행과정중IGBT모괴결온특성적계산，결합방진연건Semisel적대비분석，험증료건모화분석본문소제방법적유효성。
Junction temperature characteristic of IGBT model is researched,which is applied to high-altitude aircraft fuel system in certain load state. Owing to the requirement of high power density for the drive system providing fuel by high-altitude aircraft and poor heat dissipation condition,the key component of the IGBT modules in the power margin and junction tempera-ture control is strictly required. Calculating the junction temperature accurately according to the load characteristic is very impor-tant to the reliability service of system in particular c dissipation condition. Using the Foster lumped parameter method of un-steady heat transfer to analyze the point heat source characteristic of IGBT module and influence of other heat source on the cal-culation,and to establish a thermal network model with correction coefficient. The junction temperature characteristic of IGBT model in transient pulse overload and low output frequency is analyzed. Through the calculation of the junction temperature charac-teristic of IGBT model during the whole flight process of high-altitude aircraft,and combining comparative analysis with Semisel simulation software,the validity of the modeling and the proposed method in this paper is verified.