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An Approach for the Disassembly of Permanent Magnet Synchronous Rotors to Recover Rare Earth Materials

Heim, Markus 1; Wirth, Felix 1; Boschert, Levin 1; Fleischer, Jürgen 1
1 Institut für Produktionstechnik (WBK), Karlsruher Institut für Technologie (KIT)


The extensive electrification of the mobility sector is a crucial part for global decarbonization. To enable a successful transition, the availability of resources must be ensured. In particular, rare earth materials used in permanent magnets of permanent magnet synchronous machines (PMSM) are already considered as a critical resource. Therefore, high performance magnets of existing PMSM rotors must be recovered and remanufactured or recycled. A major challenge to recover the magnets is their fixation inside the rotor lamination stack. Hence, this paper presents an overview of remanufacturing and recycling methods for rare earth magnets. Based on this, a disassembly process for PMSM rotors is developed, technical challenges are pointed out and automation solution are proposed. As results of an experimental study conducted on different magnet configurations, four characteristic phases for the magnet disassembly process were identified and magnets with nickel coating showed significantly higher disassembly forces than magnets with epoxy coating. Moreover, analytical and empirical approaches for modeling the consecutive phases of the disassembly process are proposed.

Verlagsausgabe §
DOI: 10.5445/IR/1000160725
Veröffentlicht am 20.07.2023
DOI: 10.1016/j.procir.2023.02.013
Zitationen: 4
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Produktionstechnik (WBK)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 2212-8271
KITopen-ID: 1000160725
Erschienen in Procedia CIRP
Verlag Elsevier
Band 116
Seiten 71 – 76
Bemerkung zur Veröffentlichung Part of special issue: 30th CIRP Life Cycle Engineering Conference
Vorab online veröffentlicht am 18.04.2023
Schlagwörter Electric traction motor, permanent magnet synchronous machine, rare earth magnets, disassembly, recycling, remanufacturing
Nachgewiesen in Dimensions
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