A study of magnetic rotor systems of high-speed electromechanical energy converters

Abstract

This paper presents the results of a study of magnetic rotor systems of high-speed electromechanical energy converters in the Ansoft Maxwell software package, followed by experimental test. Two magnetic systems were considered: with semicircular and cylindrical permanent magnets. It has been found out that the system with semicircular permanent magnets makes it possible to create an electromechanical energy converter with less dense current in the windings and lower losses at identical weight and dimensions. Moreover, the rotor magnet system with semicircular permanent magnets reduces mechanical stresses in the shrouding rotor shell and, correspondingly, its mechanical expansions during operation. We have considered a case of selecting the number of terminal pairs of high-speed electrical machines with permanent magnets, which required preliminary calculations of losses in the magnetic circuit with aimed parameters for different numbers of terminals.