In this thesis, we focused on the analysis of a reluctance generator with doubly salient poles. Although we did not have access to a physical generator, with the help of software such as FEMM, MatLab, Simulink, Ansys Maxwell 2D, and Ansys Simplorer, we successfully simulated and analyzed various operating states of the generator and obtained characteristics that would typically be measured on the machine.
In analyzing the generator model in FEMM, we addressed issues considering the skew of the rotor and the appropriate approximation of the magnetic curve of the DI-MAX HF-10 material. Using magnetostatic analysis, we calculated the no-load characteristic. We performed a frequency analysis of induced voltages using the discrete Fourier transformation. We found that the rotor skew positively affects the voltage waveform, reducing the content of higher harmonics, and consequently, the total harmonic distortion (THD) factor.
Subsequently, we performed transient analyses of the generator in Maxwell 2D, where we recalculated the no-load characteristic, but this time in the time domain. We also studied the impact of loads on generator performance, calculating the external characteristics of the generator. We also calculated and simulated the short-circuit characteristic. In the final phase, we implemented a PI-controller for voltage regulation, obtaining regulated characteristics of the generator for various load types.
The results of our study show that our simulation model and obtained characteristics largely align with expectations and published results, despite some minor deviations. These analyses offer important insights into how various loads affect the operation of the generator and contribute to a better understanding of reluctance generators with doubly salient poles.
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