Abstract
Rare-earth metals used for manufacturing Permanent Magnets (PMs) remain classified as critical raw materials by the European Commission. In order to secure the supply of electrical machines due to the increasing demand of Hybrid and Full Electrical Vehicles ((H)EVs), recycling has emerged as a valuable alternative. Hence, this paper presents the concept of a modular PM machine with a hybrid rotor and 3D flux paths, for application in ((H)EVs). The proposed machine topology is intended to facilitate the extraction of PM material towards a recycling process. The selection of a machine for prototyping is carried out by investigating the effect of the variation of the number of rotor teeth and stator modules on various parameters, with models developed in Finite Element (FE). Finally, the models developed of the selected combination were validated with a detailed experimental evaluation of the prototype.
Highlights
Electrical machines are a major component in the electrification of transportation for the reduction of CO2 emissions [1]
In order to maintain the growing demand of (H)EVs, it is required to secure the supply of Rare Earth Elements (REEs) used for manufacturing of Permanent Magnets (PMs) (e.g., Neodymium, Dysprosium, etc.)
REEs are indexed as critical raw materials by the European Commission [2], which have increased awareness regarding their recycling
Summary
Electrical machines are a major component in the electrification of transportation for the reduction of CO2 emissions [1]. The recycling of PMs of the machine is addressed in conjunction with the use of non-traditional materials (e.g., grain oriented electrical sheet, amorphous laminated material, SMC, etc.) In this regard, the use of non-traditional materials in a structure with a modular stator was investigated in [12]. In order to allow an efficient recycling of the PMs, the rotor structure proposed in this work is conceived in such fashion that the use of glue is not required for holding the PMs on place. The modular stator structure proposed in [12] is expected to facilitate the extraction of the rotor As it was demonstrated, it allows the use of materials that are not commonly used in rotating electrical machines.
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