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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - High-Efficiency Weight-Optimized Fault-Tolerant Modular Multi-Cell Three-Phase GaN Inverter for Next Generation Aerospace Applications
摘要： The aircraft industry demands a significant increase in terms of efficiency and gravimetric power density of power converters for next generation aerospace applications. Between the two minimum targets, i.e. an efficiency > 98 % and a gravimetric power density > 10 kW/kg, the specification concerning the converter weight is the most challenging to fulfill. Since cooling systems and magnetic components dominate the weight breakdown of conventional converter concepts, multi-cell topologies, enabling improved semiconductors performance and reduced filtering requirements, are foreseen as promising solutions for the power electronics on board of More Electric Aircraft. On the other hand, the necessary simultaneous operation of a high number of cells inevitably limits the reliability of multi-cell converters if redundancy is not provided. In this paper, a favorable scaling trend of power density with respect to reliability, aiming to guarantee fault-tolerant operation without affecting the performance figures, is identified in modular multi-cell converters. Thus, a 45 kW weight-optimized modular multi-cell three-phase inverter featuring a redundant power stage is optimized, achieving an efficiency of 99 % and a gravimetric power density of 22.8 kW/kg.
关键词： Multi-Objective Optimization,Figure of Merit of Power Semiconductors,Power Converters Reliability,Modular Multi-Cell Inverter,More Electric Aircraft
更新于2025-09-23 15:23:52
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[IEEE 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) - Atlanta, GA, USA (2018.10.31-2018.11.2)] 2018 IEEE 6th Workshop on Wide Bandgap Power Devices and Applications (WiPDA) - EMI Analysis of a High Power Silicon Carbide Two-level Inverter
摘要： Successive generations of aircraft demand more electrical energy as pneumatic and hydraulic systems are replaced with electrical components. The more electric aircraft (MEA) transformation aims to improve fuel economy, increase reliability, and lower operating costs. To fully enjoy the benefits of an additional improvements in the power density of the electrical distribution system are required. Silicon carbide (SiC) devices have many advantages over their silicon (Si) counterparts that can lead to improvements in the power density. However, their characteristically switching speeds can result in higher levels of electromagnetic interference (EMI). This research compares the performance of two high power three phase inverters; one is built from SiC MOSFETs and the other from Si IGBTs. The efficiency and conducted EMI are measured at a DC bus of 540 V and an output power exceeding 25 kW.
关键词： Silicon Carbide,Electromagnetic Interference (EMI),More Electric Aircraft
更新于2025-09-23 15:23:52