This paper describes a discussion on the higher harmonics and distortion factor of output waveforms of voltage and current which are supplied by the thyristor-type shaft driven ac generator system with the external commutated inverter.
The experimental system is established to observe distorted waveforms of voltages and currents under various load conditions. Steady-state waveforms obtained are analyzed by the use of FFT analyzer with frequency range of 0 to 40 kHz.
It is discussed on the effect of ac reactor which is mounted to suppress the line voltage harmonics caused by commutations of the inverter. The mechanism of appearance of non-sinusoidal waveforms of voltages and currents is also introduced.
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