High-speed electrical machines and drives [Special section intro.]

This special section topic generated 53 papers submitted for peer review. Of these, only 19 papers have been accepted for publication. All the accepted papers include strong experimental activities to validate the proposed solutions. The special section starts with a paper presented by highspeed-machine specialists from Cummins together with the Guest Editors concerning the state of art of the high-speed electrical machines and drives. In this paper, a review of the current technologies used in high-speed electrical machine applications is discussed through an extensive survey of different topologies developed and built in the industry and academe. In addition, the developments in materials and components, including electrical steels and copper alloys, are also reported. The other 18 accepted papers have been grouped in several parts, taking into account their main topics. The Guest Editors provide an overview of the remaining 18 papers presented in this special section.