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Electrical Modeling and Thermal Analysis Toolbox (EMTAT) User’s GuideA simulation toolbox has been developed to model the electrical portions of Electrified Aircraft Propulsion (EAP) systems, including self-heating of electrical systems. Dynamic models of EAP systems often include turbomachinery, an electrical power system, and a thermal management system. These portions of the propulsion system can operate on timescales covering six orders of magnitude, which poses a challenging modeling task. Assumptions and approximations are made in an effort to capture the dynamics relevant to engine, electrical system, and thermal system interactions, while still allowing for fast simulations. These assumptions and approximations enable the electrical component models to run at the time scale of the turbomachinery, neglecting the very high frequency electrical dynamics, while demonstrating representative behavior of the end-to-end system. Thus the models execute in an acceptable time frame for what would otherwise be an extremely stiff simulation. The resulting simulations of EAP systems are appropriate for system-level control design and analysis. The objective of this User's Guide is to present an overview of the usage of the Electrical Modeling and Thermal Analysis Toolbox (EMTAT). It will describe some of the approximations made to accommodate rapid execution, and some of the design tools that allow matching the model to component specifications. This paper will describe the basic usage of the software toolbox, and also provide an example of EAP system modeling using EMTAT.
Document ID
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Mark E. Bell
(HX5, LLC)
Jonathan S. Litt
(Glenn Research Center Cleveland, Ohio, United States)
Date Acquired
September 28, 2020
Publication Date
September 30, 2020
Publication Information
Publication: NASA GitHub EMTAT Repository
Publisher: NASA
Subject Category
Aircraft Propulsion And Power
Electronics And Electrical Engineering
Report/Patent Number
Funding Number(s)
WBS: 109492.
Distribution Limits
Public Use Permitted.
Technical Review
NASA Technical Management
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