Cooling Technologies for High Power Density Electrical Machines for Aviation Applications

Wolf-Rüdiger Canders, Jan Hoffmann and Markus Henke
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Wolf-Rüdiger Canders: Institute of Electrical Machines, Traction and Drives; TU Braunschweig; 38106 Braunschweig, Germany
Jan Hoffmann: Institute of Electrical Machines, Traction and Drives; TU Braunschweig; 38106 Braunschweig, Germany
Markus Henke: Institute of Electrical Machines, Traction and Drives; TU Braunschweig; 38106 Braunschweig, Germany

Energies, 2019, vol. 12, issue 23, 1-23

Abstract: This paper is aimed at giving an overview of possible cooling technologies for electrical machines and their assessment for aviation applications, e.g., fan or propeller drives. The most important demand for aircraft is the minimization of the drive system weight comprising electrical machine, power electronics, and the cooling system. The potential of aluminum winding an overview about several cooling technologies with the Rankine or Brayton cycle or utilizing the phase change of the cooling fluid is given. As an alternative approach, the cooling structure inside the machine is studied. A very interesting potential was discovered with direct slot cooling (DSC) removing the heat where it is produced and, thus, simplifying the cooling system effort and its weight. Since it is one of the most promising approaches, this cooling method is studied in depth. Furthermore, it can also be combined with one of the cooling technologies discussed above.

Keywords: electric aircraft propulsion; electric aircraft drives; cooling systems for electric machines in aviation; direct slot cooling; cooling fluids; phase change; thermodynamic cycles (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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