论文标题
低压条件对WBG电力电子模块部分放电的影响
Effects of Low Pressure Condition on Partial Discharges in WBG Power Electronics Modules
论文作者
论文摘要
与基于化石燃料的电气系统相比，航空业旨在通过减少能源消耗来减少二氧化碳排放，并从更多的电气系统中受益。电动飞机（MEA）越多，可以利用基于宽带（WBG）的宽带驱动器（WBG）的功率模块，这些功率模块较轻，并且可以带有更高的电压和电流。但是，基于WBG的系统产生的快速和重复电压脉冲会由于部分放电而危害介电材料的绝缘性能。 PD会导致高电场幅度区域中绝缘材料的局部分解。在电力电子模块的情况下，硅胶是一种主要的封装材料类型，易受这些PDS的影响。在这项研究中，其目的是研究上升时间对各种PD特性的影响，包括PD真实电荷幅度，建立和消光场，持续时间等。此外，那些预计将在海军或航空行业等严格的环境条件下运行的系统可能会预计额外的威胁。因此，本文提出了低压条件和快速上升，高频方波脉冲的结合。结果表明，在较低的压力下将施加更激烈，更激烈的情况。与MATLAB连接的COMSOL多物理用于基于文献中发现的实验数据来模拟PD检测过程。
The aviation industry aims to reduce CO2 emission by reducing energy consumption and benefitting from more electrical systems than those based on fossil fuels. The more electric aircraft (MEA) can take advantage of the drives based on wide bandgap (WBG) based power modules that are lighter and can bear higher voltages and currents. However, the fast-rise and repetitive voltage pulses generated by WBG-based systems can endanger the insulating property of dielectric materials due to the partial discharges. PDs cause the local breakdown of insulation materials in regions with high electric field magnitude. In the case of power electronic modules, silicone gel, which is a predominant type of encapsulation material, is susceptible to these PDs. In this study, it is aimed to investigate the impact of rise time on various PD characteristics including PD true charge magnitude, inception and extinction fields, duration, and so forth. Besides, those systems that are anticipated to operate under harsh environmental conditions such as naval or aviation industries, may expect additional threat. Therefore, this paper puts forth the combination of low pressure conditions and fast rise, high frequency square wave pulses. The results demonstrate that more intense and more intense ones are going to be imposed at lower pressures. COMSOL Multiphysics interfaced with MATLAB is used to simulate the PD detection process based on the experimental data found in the literature.
