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Abstract
Unlike other machine types, the switched reluctance machine (SRM) has no permanent magnets or field winding on its rotor. Such a merit allows the SRM’s rotor to be operated at high temperatures and speeds. This means that the SRM, when operating as a generator, does not possess the inherent problem of generating into a shorted winding like conventional generators.
In this thesis, a successful design for a 3-phase 6/4 switched reluctance
generator (SRG) has been developed, analyzed and tested. The performance
characteristics of such a generator type are fully studied using a nonlinear
mathematical model.
Effect of parameters change on the operating characteristics of the SRG has
been inestigated. This investigation covered effects of the exciting voltage, the speed of prime-mover, the load resistance, the excitation turn-on angle and excitation turnoff angle on the phase current, source current, load current per phase, total load current, phase voltage and load voltage.
A control technique by which the actual output power that is generated by the
generator system can be successfully controlled to follow the maximum output power of a wind turbine drive application has been proposed. Moreover, stabilization of the output voltage of such a generator under varying load conditions is also presented.
Meanwhile, the real-time operation was implemented in a digital signal processor (DSP) environment. Digital simulation studies have been carried out for the proposed analysis and the results are compared to those of a practical one. A good agreement between simulation and experimental results has been observed which supports the validity of the proposed analysis.
A useful conclusions have been provided, which are considered to be a good aid for designing any SRG.