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KlausST thanks again for your reply. So if I use a AC relay with coils connected to main AC, when the main AC is going down the contactor will switch to inverter automatically. I have to over dimension the current in the AC relays?
As far as i know the relay doesn't switch immediately (it takes...
OK. So you're saying it is not important to measure phase? What about in case you have reactive loads?
what about surge current in case of switching inverter back to main AC?
Thanks again for your help on this questions.
Gaston
Thanks for your reply, using relay I must take care of the phase of my inverter and the grid difference? IF the grid is down I want to connect only vitals in my house, but I will like to use the grid to charge my batteries like the UPS but sadly I can't find any circuit of references.
thanks for...
Hi to all (again),
I desing a sine wave inverter and its working as suppose to do. Now I want to know how can I do to switch betwwen AC mains and the inverter output. As far as I can see is using AC relays and according to the current use. Is there other method? could...
Thanks again. But i want to know about the voltage and current to get the feedback to microcontroller. 12Vac and about current how much mA? or is lower Vca and X mA?
Hi BradtheRad, thanks for your reply. I found this old thread about the same Im asking auxiliary winding. If you could find the app note SLAA602A from texas instrument you will find that it uses a transformer with an auxiliary winding in the secundary for feedback control. How can this...
Hi to all, I want to make a transformer for 12dc to 230vac inverter. The only doubt i have is the secondary feedback winding. I check the app note SLAA602A from texas instruments but there is not references to the transformer. What is the value I can use for the secondary winding in the...
Hi to all,
I design a full sinewave inverter with full bridge (H bridge of Mosfets) suing the IRF3205 and IR2110. The design works OK. I have an old UPS with center tap transfomer (1KW - really heavy low freq transfomer). It's possible form me to use this center tap transformer in...
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