Hopefully? Another 48vdc-240vac Toriod Inverter build.

Author	Message
Murphy's friend Guru Joined: 04/10/2019 Location: Australia Posts: 671	Posted: 02:40pm 25 Dec 2022         mab1 said     Quote   I want something that is not a ticking time bomb, hence my desire to build a Low frequency inverter, which is supposed to be the best with these kinds of induction load. But I see things like, you should soft start with these induction loads? seriously? you mean like a brownout condition? The Air compressor and Band-saw are just going to love that. I think it's more that you have to soft start the inverter when using a large toroidal tx; obviously it is desirable to soft start big loads but not practical for many. Yes, it can be confusing for somebody who has not yet built a low frequency inverter. What happens is: you *must* slow charge the big capacitors from the battery when you connect it up first. Once they are charged up to battery voltage then you turn on power to the nano if you have the opto isolated version control board. This will slowly ramp up the AC voltage, you can see that on the scope or voltage display. Once its running and the display meter shows 230 (or so) Volt AC, its ready to start almost anything within reason. Building these things for the first time is a learning curve. It's quite easy to build a 'ticking time bomb', if you have no idea how this thing works you are at a big disadvantage here, better do some reading. I learnt as I went along, at my expense, with handfuls of blown Mosfets marking the progress. So keep that in mind if you are reading my builds from a few years back. I think I have figured it out by now