Yes, Larry. That is it.
Chopping circuits trigger harmonics like crazy.
In practical terms -- that is what constitutes a 'non-linear load.'
The original term, which came from electronics/ signal quality has morphed into an expression to describe non-ideal electrical loads.
Non-ideal means HARMONICS and so, higher frequency resonant wave-forms.
Alternating Conductors are really Wave Paths for Energy.
The wave nature of electricity tends to get down played during apprenticeships. Typically, circuits are portrayed as being DC logic. Hot in Drain out. But, in real AC circuits the wave nature of power is paramount.
A tremendous amount of posting here and every other forum revolves around the troops getting up to speed on the nature of wave physics WRT alternating power.
And harmonics/ non-linear loads is topic number one!
Cheers.
