Analysis of the Relationship between the Ratio of the Basic Dimensions of the Generator Units and their Design at the Predesign Stage

The authors have developed a series of axial three-input generator units for hybrid energy systems. These units may convert kinetic wind energy, solar energy, and thermal energy of any heat source into electric power. There are techniques for designing radial electric machines and determining their basic dimensions, but none for axial ones. This analysis allows choosing the basic dimensions of axial generator units designed considering the requirements for their weight-size and energy parameters. The authors have earlier proved that if the electric machines being compared have the same corresponding values of a given set of parameters, it can be argued that they should have the same properties of interest. The authors have called these machines equivalent. Using the regularities established by the authors for transforming the original radial electric machines into equivalent axial ones, dependencies have been found that are optimal under certain conditions: the chosen pole pair number, the pole shape, the electric machine power, the rated rotor shaft speed, etc.