https://doi.org/10.1051/epjap/2022210283
Regular Article
Research on ac copper losses in permanent magnet electrical machines with hairpin windings for automotive applications
1
Mercedes-Benz AG, Untertürkheim, Germany
2
Institute of Electrical Machines (IEM), RWTH Aachen University, Aachen, Germany
* e-mail: robin.krueger@mercedes-benz.com
Received:
10
December
2021
Received in final form:
12
February
2022
Accepted:
5
April
2022
Published online: 17 June 2022
In this paper current displacement effects and subsequently ac copper losses in hairpin windings are analyzed in detail for the example of permanent magnet excited electrical machines. The increase of copper losses due to skin- and proximity effects is evaluated across the entire torque-speed map. Their impact on the drive cycle efficiency is discussed for the standardized Worldwide Light Vehicles Test Cycle (WLTC). Moreover, the influence of the rotating magnetic field generated by the rotor’s permanent magnets on the ac copper losses is studied.
© EDP Sciences, 2022
