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)

Technische Universität Braunschweig

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)