The advent and development o/ such class o/ technical systems as electrical machines is only one element o/ those composing the technical progress, which, in turn, is one o/ elements composing the human civilization. Technical progress can be imaged as an entanglement o/ many «streams», each containing the development, putting in use, operation, and disappearance o/ a technical system. Technical progress is advanced through practical implementation o/ a multitude and variety o/ improvements. Any technical system is developed through embodying various ideas, which results in a change o/ a given system or development o/ a new system. An attempt is made to briefly describe all significant elements in the evolution o/ electrical machines (EMs). The role o/ large inventions and moderate improvements is shown; examples o/ evolution trends, patterns and lines are given; the evolution o/ EMs in the «supersystem-system-subsystem coordinate axes is described, and it is shown how applications determine the requirements /or EMs. Examples o/ the evolution o/ the materials used in EMs are considered. The role o/ individuals, teams, and organizations is discussed. Particular examples o/ evolution lines are given, and the counter/orces and limitations are described.
The innovative electric motor concept is presented. The main feature of the novel concept is accommodation of relatively large axial channels in a slim electric motor without sacrificing its torque density and radial dimensions. The motor is analyzed and the analysis is then validated by the experiments. The resulting motor performances are given and applications for the motor proposed.
The advent and development of such class of technical systems as electrical machines is only one element of those composing the technical progress, which, in turn, is one of elements composing the human civilization. Technical progress can be imaged as an entanglement of many «streams», each containing the development, putting in use, operation, and disappearance of a technical system. Technical progress is advanced through practical implementation of a multitude and variety of improvements. Any technical system is developed through embodying various ideas, which results in a change of a given system or development of a new system. An attempt is made to briefly describe all significant elements in the evolution of electrical machines (EMs). The role of large inventions and moderate improvements is shown; examples of evolution trends, patterns and lines are given; the evolution of EMs in the «supersystem-system-subsystem coordinate axes is described, and it is shown how applications determine the requirements for EMs. Examples of the evolution of the materials used in EMs are considered. The role of individuals, teams, and organizations is discussed. Particular examples of evolution lines are given, and the counterforces and limitations are described.
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