Factors Influencing The Recyclability Of Permanent Magnets Used In V-shaped Permanent Magnet Synchronous Motors Via Hydrogen Processing And Powder Metallurgy

Authors:

Laura Grau (Pforzheim University, Germany),
Carlo Burkhardt (Hochschule Pforzheim | STI, Germany)

Abstract:

The rare earths are some of the most critical raw materials, yet electromobility and green energy strongly rely on Rare Earth Permanent Magnets (REPM). To secure the supply and improve the ecological footprint of REPM, a hydrogen-aided powder-metallurgical reprocessing route was successfully established and continues to be improved. A remaining obstacle is the sourcing and demounting of REPM-containing scrap. Demounting must especially be optimized towards achieving a maximum yield of high-quality material in conjunction with economic efficiency.Electric traction motors, which will be an abundant but dissipated scrap REPM source in the future, are often very hard to demount. To exploit this important raw material source, their design must accommodate efficient recycling. This paper deals with how design choices of the most common rotor permutation, the V-shaped internal Permanent Magnet Synchronous Motor rotor (VPMSM), impact the recyclability of the integrated magnets and provides a design for recycling framework.

DOI:

https://doi.org/10.59499/WP225367983