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This paper contributes to the research and development of Axial Flux Permanent Magnet Synchronous Machines (AFPMSM); and in particular the design, the construction stages and measurements of a double rotor single internal non-ferromagnetic stator with a trapezoidal-concentrated winding machine for wind power generation applications. The initial dimensions of the machine were calculated using analytical formulas and a model was created and analyzed using the 3D Finite Element Method (FEM). The shape of the magnets of the machine was optimized and presented in a previous paper and a prototype was constructed and tested in the laboratory. In addition, a temperature test of the stator was performed experimentally. Finally, the effect of the different axial widths of the two air gaps on the electrical magnitudes and the field of the machine were investigated using both FEM analysis and experiments. [ABSTRACT FROM AUTHOR]

The steady-state electromagnetic and thermal performance of an induction motor under healthy operation and under broken-bar fault are studied using the finite element method. The results are compared and therefore the effect of the fault on the electromagnetic and thermal behavior of the motor is determined. Two different electromagnetic finite element models, one for the healthy and the other one for the faulted operational state of the motor, are used. In both cases the copper and iron losses are calculated by means of two-dimensional time-stepping electromagnetic analysis, taking into consideration the high-order harmonics of the current and flux density respectively. The losses are imported into the respective thermal models as heat sources and the temperature distributions on the thermal models are eventually obtained and compared. [ABSTRACT FROM AUTHOR]