Experimental Investigation of a New Manufacturing Technology for Hairpin Stators with Litz Wires

Riedel A, Kühl A, Franke J, Graf R, Hubert T, Bauer D (2022)

Publication Type: Conference contribution

Publication year: 2022

Publisher: Institute of Electrical and Electronics Engineers Inc.

Conference Proceedings Title: 2022 12th International Electric Drives Production Conference, EDPC 2022 - Proceedings

Event location: Virtual, Online, DEU

ISBN: 9781665454032

DOI: 10.1109/EDPC56367.2022.10019747

Abstract

The increasing demand of electric drives in the mobility sector leads to continuous innovations in the development and production of electric machines. Currently, it can be seen that hairpin technology is well established in the automotive industry for traction drives. In addition to the high level of automation of the process, the reasons therefore are the achievable copper filling factors, which result from the flat conductors used and thus increase the power density of the electrical machine. However, at higher frequencies, as a result of higher driving speeds, large conductor dimensions, especially the height of the conductor, lead to undesirable aspects in the form of eddy current losses. These negative effects can be reduced by replacing the solid rectangular conductor with a stranded conductor. Therefore, the substitution of the conductor material in the field of hairpin technology can be classified as the next innovation stage. The base material is a twisted stranded conductor compacted into a rectangular shape. In this paper, a novel process chain for the manufacturing of a stranded hairpin stator is presented, individual process steps are analyzed and potential improvement measures are explained. Subsequently, an evaluation is made on the basis of an assembled and electrotechnically measured stator with stranded hairpins.

Authors with CRIS profile

Andreas Riedel Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik Alexander Kühl Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik Jörg Franke Lehrstuhl für Fertigungsautomatisierung und Produktionssystematik

Involved external institutions

Porsche AG / Dr. Ing. h.c. F. Porsche Aktiengesellschaft DE Germany (DE)

How to cite

APA:

Riedel, A., Kühl, A., Franke, J., Graf, R., Hubert, T., & Bauer, D. (2022). Experimental Investigation of a New Manufacturing Technology for Hairpin Stators with Litz Wires. In 2022 12th International Electric Drives Production Conference, EDPC 2022 - Proceedings. Virtual, Online, DEU: Institute of Electrical and Electronics Engineers Inc..

MLA:

Riedel, Andreas, et al. "Experimental Investigation of a New Manufacturing Technology for Hairpin Stators with Litz Wires." Proceedings of the 12th International Electric Drives Production Conference, EDPC 2022, Virtual, Online, DEU Institute of Electrical and Electronics Engineers Inc., 2022.

BibTeX: Download