EG8010 frequency Accuracy

Author	Message
oreo Senior Member Joined: 11/12/2020 Location: Canada Posts: 112	Posted: 07:31pm 26 Jan 2025         noneyabussiness said   I didn't mean to be rude about the point of this... No worries, I am your typical male.  I am not programmed from the factory to determine if someone is being rude or recognize if I myself am being rude. Tinyt -thanks for chiming in!  I did find another thread here with complaints about 60hz stability. Since last night, I have compared my digital clock time, to my watch 3 times 1-5hr spans and got different error differences suggesting frequencies of 60.18, 60.14 and 60.23 Hz.  Average frequency over the whole period is 60.17Hz.  So the inverter seems to be running fast, but not consistently which does not make any sense to me.  Noise would make more sense, but there is no noise when operating just the module on the bench. My inverter output waveform can look really good depending on the load.  Here is it with the microwave and furnace on.  This is about as bad as I have seen it get. Note that the frequency measured by the scope jumps between 59.686 and 60.686 hz (2 values). I think I will monitor the clock error for a longer period.