Design, Calculation and Selection of Materials for Electrical Machines with Permanent Magnets

This paper presents an approach to the design, parameters calculation and materials selection, taking into account various aspects of permanent magnet electric machines. Electromagnetic factors affecting the dimensions and control of electric machines are given. Analytical expressions for determining dimensions and parameters has been presented. Also the recommendations for choosing the number of poles and slots are given. The materials used in electric machines are described. Their main properties are given. The permanent magnet electric machines design features, which determine the shape of their back EMF are considered. The control types are considered and their analytical comparison is carried out. Also some aspects of permanent magnet electrical machines designing that should be taken into account are discussed.