An Overview of High-Speed Axial Flux Permanent Magnets Synchronous Machines

With the development of axial flux technology and industrial evolution, traditional machines cannot fit application requirements. Radial flux machines represent the majority of machines in high-speed application but they are not always an optimal solution according to the criteria of the considered applications. The design of the high-speed axial flux machines is challenging where many multi-physics critical issues remain to be solved. This paper reviews the high-speed axial flux machines in terms of different features such as machine types and designing structure, mechanical constraints, specific losses, materials, and application domains. The purpose is to give an overview of different technics and solutions in the literature to meet the needs of the high-speed axial flux machines to investigate their development and integration in different applications.