Harmonic factor of nth harmonic, HFnIt is a measure of individual harmonic contribution. HFn versus the control parameter gives the harmonic profile of the inverter. Small HFn value is desired.
Total harmonic distortion, THD
It is a measure of closeness in shape between a waveform and its fundamental component (sinusoidal waveform). THD = 0 means sinusoidal wave.
Distortion Factor, DF
DF indicates the amount of HD that remains in a particular waveform after the harmonics of that waveform have been subjected to the second order attenuation (i.e. divided by n2)
DF of nth harmonic component, DFn
LOH is that harmonic component whose frequency is closest to the fundamental one. Its amplitude is normally > 3% of the fundamental component. High LOH is desired.
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