How exactly is "pure sine wave" generated by UPS? And how "pure" is that? THD? IM distortion? Noise? frequency change? Voltage variation? Etc. I know that normally generates a rotating magnetic field, but I'd be a bit surprised if UPS would do that. I think it would be a way to fairly accurate the area beneath the sine through pulses of higher frequency, and then move closer to the heart through a filter LF. Please help me out to solve this doubt thank you.
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