Investigation of Hybrid Rotor Topologies for Electrically Excited Synchronous Motors in Traction Drives

Authored by

Sven Aufderheide, Leander Philipp Eschenmann, Christian Noerenberg, Bernd Ponick

Abstract

In the automotive industry, there is a trend towards electrically excited synchronous motors (ESMs) to reduce the use of rare earth magnets. The paper presents an algorithm for automatic rotor slot positioning in hybrid rotor topologies, hybrid meaning a cross between a salient pole rotor and a cylindrical rotor. To find the best rotor, the design parameters of the algorithm are determined by applying a previously described combined optimization method for ESMs. The electromagnetic optimization itself shows that the synchronous machine with hybrid rotor (HRSM) offers advantages in terms of torque density and is a viable alternative to salient pole synchronous motors (SPSMs) for traction applications, especially regarding peak performance. However, slight disadvantages in energy consumption during continuous operation have to be considered.

Details

Organisation(s): Institute of Drive Systems and Power Electronics
External Organisation(s): Volkswagen AG
Type: Conference contribution
Pages: 865-870
No. of pages: 6
Publication date: 16.11.2025
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electrical and Electronic Engineering, Mechanical Engineering
Sustainable Development Goals: SDG 7 - Affordable and Clean Energy
Electronic version(s): https://doi.org/10.23919/ICEMS66262.2025.11317611 (Access: Closed )