Study on generation of harmonic voltage using synchronous machine with d-axis and q-axis harmonic field windings - part 2

We investigated the harmonic voltages generated by a synchronous machine adding d- and q-axis harmonic field windings to reduce the harmonics in a power line. First, electronic circuits such as a frequency multiplier, band-pass filter, and phase shifter were newly designed and made to carry out the experiment. Next, an experimental circuit, for which an AC voltage of frequency 6f synchronized to the power line voltage of frequency f could be obtained, was constructed to examine the generation of harmonic voltage in more detail. Finally, an experiment involving the generation of harmonic voltage was performed using an experimental synchronous generator with harmonic windings in the d- and q-axis. In this paper, the experimental results on the generation of harmonic voltage by the synchronous machine are presented.