Structural analysis and principle of symmetry at perfection of electric machine design
The history of theory of systems and theory of symmetry and their application to analysis of separate elements and units of electric machines (EM) are considered. Problems of EM design perfection are considered from the general points of theory of systems and theory of symmetry. Advantages of development of EM design with a radial-axial cooling system (a symbol of n:m symmetry) versus advantages of EM design with an axial cooling system are analyzed.