2026-04-21T06:47:44Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/139022026-03-18T08:32:39Zcom_20.500.11984_1143col_20.500.11984_1148

Optimisation of an Automotive Permanent Magnet Motor with Low Coercivity Recycled Magnets Considering Demagnetisation Arribas Imaz, Beñat Almandoz, Gaizka Egea, Aritz Poza, Javier Ugalde, Gaizka Garramiola, Fernando Permanent magnet motor Automotive Design Optimisation Power-density Efficiency ODS 7 Energía asequible y no contaminante ODS 9 Industria, innovación e infraestructura ODS 11 Ciudades y comunidades sostenibles ODS 13 Acción por el clima Permanent Magnets (PM) containing Rare Earth Elements (REE) are widely used in the automotive industry to achieve power-dense and efficient motor designs. However, their supply chain is highly vulnerable and subject to significant price fluctuations. Consequently, recycling PMs with REEs presents a sustainable alternative to mitigate these issues, but the recycling process can weaken the magnetic properties of these magnets. The higher risk of demagnetisation, lower temperature tolerance, and reduced flux density make it challenging to achieve power-dense and efficient motor designs. Therefore, this article introduces an optimisation methodology for permanent magnet motors accounting for demagnetisation. Optimisations of five rotor topologies were carried out first, and considering magnet mass, power capability, and the resistance to demagnetisation, the V-Blockshaped rotor topology was identified as the best candidate. The selected candidate accomplished all the requirements, with a high power capability and no demagnetisation. 2025-07-09T07:31:21Z 2025-07-09T07:31:21Z 2025 979-8-3315-2074-8 2380-856X https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=189472 https://hdl.handle.net/20.500.11984/13902 eng © 2025 IEEE IEEE