Effect of the Excitation Conditions on the Power Generation Efficiency of a Switched Reluctance Generator

This paper proposes an excitation angle condition capable creating high generation efficiency for a switched reluctance generator (SRG) with low loss. This paper examines high power generation efficiency by reducing copper loss in 12/8 switched reluctance generators operated at various speeds within a wind power generation system. For this purpose, excited current waveforms and excitation angles capable of reducing the copper loss are considered. The current waveforms that appear in the duration of the excitation stage are classified into three types. The copper loss and energy conversion loop that depend on the excitation current waveforms are also analyzed. Furthermore, the correlations between the excitation condition and power generation efficiency, copper loss, excited current waveforms and energy conversion loop are considered. Finally, the excitation conditions which reduce copper loss and improve the power generation efficiency at various speeds are summarized.