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<p>A lot of studies claim that the use of rectangular wires leads to excessively high additive losses, so it is necessary to use litz wires instead. The calculations carried out on an aircraft propulsion electric motor show that a power density comparable to Siemens, Helix and H3X motors cannot be achieved using litz wire. Therefore, this study analyzes different winding designs with rectangular wires as well as winding produced via additive methods. It also demonstrates how to achieve a specific power of 6&#xa0;kW/kg at 2000&#xa0;r/min and 12&#xa0;kW/kg at 4000&#xa0;r/min. The calculations made in the study prove the possibility of designing the winding so that even at a current frequency of 1.5&#xa0;kHz, the AC/DC loss ratio will be 1.45, and the winding temperatures will be within acceptable limits. The calculations are validated by experiments.</p>

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Stator winding design for a high specific power aircraft propulsion motor

  • 期刊论文

  • 发表日期：

    2026年1月19日

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  • Evgeny Zharkov,
  • Aidar Shayhlislamov,
  • Mikhail Okhotnikov

摘要

A lot of studies claim that the use of rectangular wires leads to excessively high additive losses, so it is necessary to use litz wires instead. The calculations carried out on an aircraft propulsion electric motor show that a power density comparable to Siemens, Helix and H3X motors cannot be achieved using litz wire. Therefore, this study analyzes different winding designs with rectangular wires as well as winding produced via additive methods. It also demonstrates how to achieve a specific power of 6 kW/kg at 2000 r/min and 12 kW/kg at 4000 r/min. The calculations made in the study prove the possibility of designing the winding so that even at a current frequency of 1.5 kHz, the AC/DC loss ratio will be 1.45, and the winding temperatures will be within acceptable limits. The calculations are validated by experiments.