OK guys,
Getcha thinking caps on!. [Linked Image]
XYZ454 (Brian) and I were talking about this in the Chat room tonight.
Now we all know that an SMPS (Switch-mode Power Supply) creates a lot of harmonics in it's Neutral.
Question is why?.
My understanding of it is, when the Switch-mode chip converts the incoming 50 or 60Hz Sine wave into HF AC and then to DC at a lower voltage.
All of this Phase conversion (modification of the original Sine wave) cause a spike to be transmitted down the Neutral.
Sure the SMPS has made computers a lot lighter and to a certain extent cheaper too, but my understanding is of the SMPS, the heavier you load it, the worse the Harmonics get?.
Can anyone give me a definite answer?.