Self-Healing Permanent Magnet Machines

The concept of self-healed permanent magnet (PM) machines is presented in this article. In order to demonstrate its technical feasibility, the remagnetization behavior of hard ferrite magnets in closed circuit as a function of temperature is initially discussed. Next, the experimental assessment of the remagnetization of engineered parts-with distinct geometry/dimensions from those of the material assessment-installed in an interior PM motor is addressed. Although the concept is agnostic regarding the PM material implemented, this study focused on ferrites since it explores best its benefits due to a unique combination of low criticality of elements, intrinsic physical properties, and cost accessibility.

Automated summary

This study introduces the concept of self-healed permanent magnet machines and discusses their technical feasibility. The remagnetization behavior of hard ferrite magnets and the experimental assessment of engineered parts in an interior PM motor are explored, with a focus on the benefits of using ferrites in terms of element criticality, physical properties, and cost accessibility.