Limits, Modeling and Design of High-Speed Permanent Magnet Machines
There is a growing number of applications that require fast-rotating machines; motivation for this thesis comes from a project in which downsized spindles for micro-machining have been researched. The thesis focuses on analysis and design of high-speed PM machines and uses a practical design of a high-speed spindle drive as a test case. Phenomena, both mechanical and electromagnetic, that take precedence in high-speed permanent magnet machines are identified and systematized. The thesis identifies inherent speed limits of permanent magnet machines and correlates those limits with the basic parameters of the machines. The analytical expression of the limiting quantities does not only impose solid constraints on the machine design, but also creates the way for design optimization leading to the maximum mechanical and/or electromagnetic utilization of the machine. The models and electric-drive concepts developed in the thesis are evaluated in a practical setup.
Nominated as an outstanding PhD thesis by Delft University of TechnologyOutstanding work in the field of high-speed electric machines Analyzes different limits of high-speed permanent magnet machines, as well as their modeling and design Identifies and systematizes both the mechanical and electromagnetics phenomena that take precedence in high-speed permanent magnet machines