Submitted by Erika Demachki (erikademachki@gmail.com) on 2016-01-07T14:42:53Z No. of bitstreams: 2 Dissertação - André Luiz Carneiro Franco - 2015.pdf: 2564368 bytes, checksum: 93761b2c7af9677536a7897fd4aa57f3 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Erika Demachki (erikademachki@gmail.com) on 2016-01-07T14:44:04Z (GMT) No. of bitstreams: 2 Dissertação - André Luiz Carneiro Franco - 2015.pdf: 2564368 bytes, checksum: 93761b2c7af9677536a7897fd4aa57f3 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2016-01-07T14:44:04Z (GMT). No. of bitstreams: 2 Dissertação - André Luiz Carneiro Franco - 2015.pdf: 2564368 bytes, checksum: 93761b2c7af9677536a7897fd4aa57f3 (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2015-09-15 / Fundação de Amparo à Pesquisa do Estado de Goiás - FAPEG / This work presents an analysis and optimization metho dology for the AC machines stator windings design, based on magnetomotive force harmonic distortion study. For that, the three-phase double layer integral and fractional-slot windings are chosen. At first, magnetomotive force in conventional windings study is p erformed, comparing harmonic analysis by distortion and Fourier sp ectrum with the traditional calculation metho dology of winding factors. In relation to the metho d, the stator windings arrangement optimization using genetic algorithms is prop osed, in order to suggest alternative optimized layouts. The results are presented and discussed. / Este trabalho apresenta metodologia para análise e otimização de geometrias de enrolamentos de estator de máquinas CA, baseada no estudo da distorção harmônica associada à curva de força magnetomotriz no entreferro. Para tal, opta-se p elo estudo dos enrolamentos trifásicos de dupla camada integrais e fracionários. Primeiramente é realizado o estudo da força magnetomotriz dos enrolamentos convencionais, confrontando a análise harmônica através da distorção e espectro de Fourier com a metodologia tradicional de cálculo dos fatores de enrolamento. Definido o método, propõe-se a otimização do arranjo de enrolamentos de estator utilizando algoritmos genéticos, com o objetivo de sugerir geometrias alternativas otimizadas. Os resultados obtidos são apresentados e discutidos.

This thesis deals with the design of a permanent-magnet synchronous inner rotor motor for an in-wheel application for the Shell Eco Marathon Urban concept vehicle. First of all, concepts related to permanent magnet motors are studied. Likewise, different features of permanent magnet motors are qualitatively evaluated in order to choose the most suitable. A radial flux motor is selected based on its solid, economic and acceptable characteristics. Next, a detailed study of concentrated windings is carried out. Through this investigation, undesirable configurations of pole and slot numbers due to unbalanced magnetic pull or a low fundamental winding factor will be avoided and how to determine the different winding layouts for different pole and slots configuration will be explained. As well, based on this study, and the magnetic and electric behavior of the machine, an analytical model is created. This model calculates the optimum size and characteristics of a machine in order to obtain lightweight design. After that, the design of a program based on a finite element method that simulates different situations for the machine is accomplished, dealing with the difficulties that entails the concentrated windings. Finally, through the use of this program, the machine calculated by the analytical model is analyzed, specially regarding that it does not surpass some important margin in order not to be demagnetized or not to surpass the maximum phase voltage supplied by the batteries.

The fist part of this work is dealt with the construction of the mathematical models of voltage and current transformers. There are created and simulated models of voltage and current transformer with the nonlinear magnetization characteristics. The second part of this work is dealt with equivalent circuit of the induction motor in the form of Gamma-circuit. The speed-torque characteristic and the dependence of stator current on the slip are calculated from this equivalent circuit. The third part of this work is dealt with electromagnetic design of the alternating current machines by the help of a classic way and a new way.

The doctoral thesis is divided into three main parts with a focus on induction motors. The first part deals with the electromagnetic design and analysis of windings of AC ma-chines. There is introduced the density of conductors, which describes the distribution of the windings in the slots. There is derived general formula for calculation of the total winding factor applicable to any type of winding. The second part of this work deals with the acceleration method of the induction motors torque-speed characteristics measurement. The measured characteristics are used for exact identification of the equivalent circuit parameters of induction motor. The third section is focused on a very precise identification of the equivalent circuit parameters of induction motor in the form of -circuit. The identification is based on mutual comparison of measured and calculated torque-speed and current-speed characteristics.

This thesis deals with the elaboration of The Permanent Magnet Synchronous Motor and the calculation of its parameters. In the first part, the construction and used permanent magnets of this motor are listed here. The next part of the thesis contains a short overview of the stator windings, the calculation of the winding factors and calculation of the basic parameters of the stator winding. The calculation of the magnetic induction in the air gap is also illustrated here. The result is recalculated by using the Carter factor and then the value of the first harmonics of air-gap flux density is determined. The result is compared with the analysis in the program FEMM. The next part of the thesis is creating a comprehensive overview of the machine using a replacement circuit diagram and phasor diagrams. Finally, the thesis contains model created in RMxprt and ANSYS Maxwell. The results of the model analysis are compared with the analytical calculation

This diploma thesis is focused on an analysis and design of an AC machines windings. In the theoretical part of the thesis, differences between single-layer and double-layer windings are explained. Next, the properties of a stator winding of synchronous machines are described. Finally, the winding factor is determined by means of a standard calculation method and by means of a new progressive calculation method, too. In the experimental part of this thesis, the stator winding of a high-speed synchronous generator excited by permanent magnets on the rotor is designed. This generator is driven by a steam turbine.