The electric propulsion drives for the more-electric aircraft need lightweight and high-efficiency power converters. Moreover, a modular approach to the construction of the drive ensures reduced costs, reliability, and ease of maintenance. In this article, the design and fabrication procedure of a modular dc-ac three-level t-type single phase-leg power electronics building block (PEBB) rated for 100-kW, 1-kV dc-link is reported for the first time. A hybrid switch (HyS) consisting of a silicon insulatedgate bipolar junction transistor (IGBT) and silicon carbide metal-oxide-semiconductor field-effect transistor (MOSFET) was used as an active device to enable high switching frequencies at high power. The topology and semiconductor selection were based on a model-based design tool for achieving high conversion efficiency and lightweight. Due to the unavailability of commercial three-level t-type power modules, a printed circuit board (PCB) and off-the-shelf discrete semiconductor-based highpower switch was designed for the neutral-point clamping. Also, a nontrivial aluminum-based multilayer laminated bus bar was designed to facilitate the low-inductance interconnection of the selected active devices and the capacitor bank. The measured inductance indicated symmetry of both current commutation loops in the bus bar and value in the range of 28-29 nH. The specific power and volumetric power density of the block were estimated to be 27.7 kW/kg and 308.61 W/in ³ , respectively. The continuous operation of the block was demonstrated at 48 kVA. The efficiency of the block was measured to be 98.2%.

中文翻译：

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飞机电动推进器的高效，高比功率三电平T型电力电子积木设计

用于更多电动飞机的电动推进驱动器需要轻便高效的功率转换器。此外，采用模块化方法构造驱动器，可确保降低成本，提高可靠性并简化维护。本文首次报告了额定功率为100 kW，1 kV直流链路的模块化dc-ac三级t型单相支路电力电子构建块（PEBB）的设计和制造过程。由硅绝缘栅双极结晶体管（IGBT）和碳化硅金属氧化物半导体场效应晶体管（MOSFET）组成的混合开关（HyS）被用作有源器件，以实现高功率下的高开关频率。拓扑和半导体选择均基于基于模型的设计工具，以实现高转换效率和轻量化。由于没有商用三电平t型功率模块，因此设计了印刷电路板（PCB）和现成的基于离散半导体的大功率开关用于中性点钳位。此外，还设计了非平凡的铝基多层层压母线，以促进所选有源器件和电容器组的低电感互连。测得的电感表明母线中两个电流换向环路的对称性，其值在28-29 nH的范围内。该模块的比功率和体积功率密度估计为27.7 kW / kg和308.61 W / in 设计了一个非平凡的铝基多层层压母线，以促进所选有源器件和电容器组的低电感互连。测得的电感表明母线中两个电流换向环路的对称性，其值在28-29 nH的范围内。该模块的比功率和体积功率密度估计为27.7 kW / kg和308.61 W / in 设计了一个非平凡的铝基多层层压母线，以促进所选有源器件和电容器组的低电感互连。测得的电感表明母线中两个电流换向环路的对称性，其值在28-29 nH范围内。该模块的比功率和体积功率密度估计为27.7 kW / kg和308.61 W / in ³ ，分别。演示了该模块在48 kVA下的连续运行。测得该嵌段的效率为98.2％。