S. Jiao, R. R. Krishna, K. Rajashekara, Yijiang Jia
{"title":"Induction Generator Based Electrical Power Generation System for More Electric Aircraft Applications","authors":"S. Jiao, R. R. Krishna, K. Rajashekara, Yijiang Jia","doi":"10.2514/6.2020-3562","DOIUrl":"https://doi.org/10.2514/6.2020-3562","url":null,"abstract":"This paper investigates a variable speed constant frequency power generation system based on induction generator for a three-phase four wire system in more electric aircraft (MEA) applications. In the proposed scheme, the induction generator is driven by the shaft of an engine. The generator output is connected to an active rectifier with a dc link capacitor. The engine also drives a permanent magnet generator (PMG), the output of which initially charges the dc link capacitor to the desired voltage level. The dc voltage is converted to constant frequency constant amplitude ac voltage for three-phase four-wire loads of the aircraft using a four-leg inverter. In this paper, a flux optimization-based vector control strategy for the induction generator with power factor improvement is investigated. Also, the overload capability and transient performance of the induction generator in a MEA architecture is presented.","PeriodicalId":403355,"journal":{"name":"2020 AIAA/IEEE Electric Aircraft Technologies Symposium (EATS)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126413213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Christopher A. Perullo, Mingxuan Shi, Gokcin Cinar, Alan Alahmad, M. Sanders, D. Mavris, M. Benzakein
{"title":"An Update on Sizing and Performance Analysis of a Hybrid Turboelectric Regional Jet for the NASA ULI Program","authors":"Christopher A. Perullo, Mingxuan Shi, Gokcin Cinar, Alan Alahmad, M. Sanders, D. Mavris, M. Benzakein","doi":"10.2514/6.2020-3590","DOIUrl":"https://doi.org/10.2514/6.2020-3590","url":null,"abstract":"Under the NASA University Leadership Initiative (ULI) program, a team of universities are collaborating on the advancement of technologies a hybrid turboelectric regional jet, with an intent to enter service in the 2030 timeframe. In the previous studies of the ULI program, the in-service benefits of the technologies under development were analyzed by integrating the technologies of interest to a 2030 regional jet with a hybrid turbo-electric distributed propulsion system. As the program has progressed, the projected performances for each technology and subsystem have been updated. This paper presents an update in the sizing and performance analysis of the regional jet with the hybrid turbo-electric distributed propulsion system, by integrating the updated values of the technologies and subsystems to the vehicle. The updates in this paper include the DC/AC conversion links, efficiency of generator and cabling losses, weight of the wires, the battery cooling through the environmental control system, motor and inverter cooling by the thermal management system, and the redundancy strategy of the propulsion system. The updates of the results from the integrated model include the overall efficiency of the propulsion system, mission fuel savings, mission energy flow distribution, and the optimal hybridization rate in climb and cruise. The overall fuel saving benefit for the target 600-nmi mission is 19.9% compared to the baseline aircraft.","PeriodicalId":403355,"journal":{"name":"2020 AIAA/IEEE Electric Aircraft Technologies Symposium (EATS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121653268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}