Modelo de dimensionamento de geradores síncronos de número de ranhuras por polo por fase fracionário e enrolamento de camada dupla com ímãs permanentes de ferrite de superfície

Abstract

This work presents the use of a analytic dimensional model to determine the principal geometric dimensions of a permanent magnet synchronous generator. The importance of eolic electricity generation to Brazil, which is a country with large hydrographies, is first approached. It is proved, by the Albert Betz’s concepts, that the power conversions of a turbine has direct relationship with the shape and the number of blades. Next, the types of the types of permanent magnet generators available in the literature are explained, with focus on those applied to eolic generation. The internal rotor topology is adopted and examined in the text. The choice of ferrite magnets comes from two main advantages involving economy and immunization to Foucault currents due to the magnets not being metallic.Three projects are elaborated to reach a satisfactory degree with focus on the minimization of the cmf error. The project evolution one embody the effect of magnet dispersion which was not considered in the base project, and the project evolution two is partially restructured by the Carter factor. It is verified the chain increase of induced voltage, in its fundamental harmonic and in the flux, as the simulation progresses. The sizing of the machine is shown, but the on-load simulation shows that although the emf has a percentage error of only 1.83%, the machine is not fully ready for manufacture because the terminal voltage is below 220 V of expected line (191.6 V rms).