Author Topic: Inverter Build Project.  (Read 44 times)

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Offline welshman

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Inverter Build Project.
« on: September 15, 2020, 06:21:32 pm »
As a backup inverter I plan on utilizing this casing and transformer.

I've been brainstorming lately on how to build a power board / mosfet circuit and i think i've come up with something that is new and should be interesting to see.

over the coming weeks i'll be putting this together and documenting it's build.

this is what im starting with.

Offline Pete

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Re: Inverter Build Project.
« Reply #1 on: September 16, 2020, 05:43:43 pm »
I am interested in how much Idle current that type of transformer draws. Old welding transformers like that are pretty easy to come by these days with everyone going for inverter welders. They may work out well for inverter builds. Just wondering about the looseness of the magnetic circuit and if they have horrendous idle currents.
Good luck

Offline ClockmanFrance

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Re: Inverter Build Project.
« Reply #2 on: Yesterday at 02:24:41 pm »
I have had a APC UPS 5000va, that would self start and would give about 3.7kw of 240vac from my 1100ah 48v battery bank.

The problem was that type of sheet laminate EW transformer was eating 200 watts from my precious batteries just running.

Now days i use a toroid wound core, and with suitable Ferrite Choke my new OzInverter Inverter now only uses about 30 watts, so far more efficient using a toroid core.

However, toroid cores and the Inverter power board need to soft start.