Design of a Direct-Liquid-Cooled Motor and Operation Strategy for the Cooling System

verfasst von: Ralf Johannes Keuter, Florian Niebuhr, Marius Nozinski, Eike Krüger, Stephan Kabelac, Bernd Ponick
Abstract: To make an all-electric aircraft possible, both high power densities and efficiencies are needed. However, particularly high demands are also placed on the thermal management system. Often, the electric motor and cooling system are considered without co-optimization. Particularly in the case of electric motors with conductors directly cooled by a liquid, there is great potential for optimization, since the temperature-dependent Joule losses determine the largest part of the losses. This publication shows the main influencing parameters for the electric motor and cooling system: coolant speed and winding temperature. In addition, the influence of the cooling system control during a flight mission is demonstrated and its potential in mass reduction is quantified. It could be shown that with a low utilized electric motor the maximum winding temperature of 130 (Formula presented.) C is beneficial, the cooling system should work in almost all operation points in its sized operation and the mass of the heat exchanger and pump is negligible compared to the mass of the electric motor and energy storage.
Organisationseinheit(en): Institut für Antriebssysteme und Leistungselektronik
Institut für Thermodynamik
Externe Organisation(en): Exzellenzcluster SE²A Sustainable and Energy-Efficient Aviation
Typ: Artikel
Journal: ENERGIES
Band: 16
ISSN: 1996-1073
Publikationsdatum: 12.07.2023
Publikationsstatus: Veröffentlicht
Peer-reviewed: Ja
ASJC Scopus Sachgebiete: Erneuerbare Energien, Nachhaltigkeit und Umwelt, Feuerungstechnik, Ingenieurwesen (sonstige), Energieanlagenbau und Kraftwerkstechnik, Energie (sonstige), Steuerung und Optimierung, Elektrotechnik und Elektronik
Ziele für nachhaltige Entwicklung: SDG 7 – Erschwingliche und saubere Energie
Elektronische Version(en): https://doi.org/10.3390/en16145319 (Zugang: Offen)