Quote:
Originally posted by joemac
While the modify sine wave looks “bad” it really isn’t. That modified sine wave in some cases is better then what comes out of the wall in some parts of the country.
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What country are you talking about? Iraq?
Have you got proof to back up that statement? That waveform has a huge amount of harmonic distortion compared to anything anyone is likely to receive as residential service from an electrical utility in the US.
Although I couldn't find anything authoritative via Google, the general consensus was that a modified sinewave would result in a 20% increase in heat generation in typical motors. Magnetic drive pumps, being much more inductive than typical motor applications, may be much more severely impacted.
Another issue, which hadn't occurred to me earlier, is the magnetic field emitted by the pump, which can affect CRT's. The emitted field would be much nastier with a modified sinewave.