【摘要】 轨道交通牵引变流器在车辆启动加速和紧急制动过程中，会运行在过载工况，即流过IGBT的电流超过设计的额定电流。此时虽然仍在器件允许电流范围内，但IGBT损耗会出现较大增幅，导致变流器温升大幅波动。研究一种集成门极电压泵升技术的IGBT驱动电路，在需要短时加大IGBT通流能力时，可以将门极开通电压升高，降低IGBT的导通压降，减小IGBT的损耗和温升波动。分析过载工况下的牵引变流器工作特性，并在此基础上计算IGBT的损耗和温升情况；分析门极开通电压升高对IGBT导通压降的影响，并设计具有门极电压泵升功能的IGBT驱动电路。通过仿真和双脉冲动态开关实验，验证此设计功能的有效性。更多还原

【Abstract】 Traction converter will operate under overload condition in the process of train starting and emergency braking. The IGBT current will exceed the rated current. Despite it still being within the allowable current range of the device, the IGBT loss will increase greatly, resulting in a large fluctuation in the temperature rise of the converter. In this paper, an IGBT drive circuit with integrated gate voltage boosting technology was studied, which can increase the gate turn-on voltage and reduce the turn-on voltage drop of the IGBT, in the case of the need to increase the IGBT current carrying capacity in a short period of time, thereby reducing the loss and temperature fluctuation of the IGBT. Firstly, the operating characteristics of the traction converter under overload conditions were analyzed, whereby the loss and temperature rise of the IGBT were calculated. Secondly, the influence of gate voltage rise on IGBT turn-on drop was analyzed, and an IGBT drive circuit with gate voltage boosting function was designed. Finally, the effectiveness of this design was verified through simulation and double-pulse experiments.更多还原