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Warpspeed
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Joined: 09/08/2007
Location: Australia
Posts: 4406

Posted: 06:09am 21 Nov 2017

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Welcome to the Forum tinyt

It will need to be supplied with +12v and +5v dc, plus requiring heatsinks, and possibly an output transformer.

They say +380v dc, and that assumes that you are planning to have a 240v (or thereabouts) direct sine wave ac output without using any output transformer.

While many people choose to do it that way, it is not without its risks, and at least in Australia an inverter MUST be fitted with an output transformer for compliance.
Its not just bureaucratic hot air and legalistic BS either.

What happens if your FETs short out and feed +380v dc (at high source current) into your home?

Most electronic systems with switching power supplies will not care, but anything that uses a small mains transformer or induction motor will be toast. Any incandescent light bulbs are not going to survive 380v for very long either.

I was unfortunate to experience this problem myself once. Burned out the small control transformers in three gas space heaters, my refrigerator, microwave oven, and a couple of wall packs. It was a real pain to repair it all, and very frustrating.

Cheers, �Tony.

Madness

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Joined: 08/10/2011
Location: Australia
Posts: 2498

Posted: 06:53am 21 Nov 2017

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hotwater said I bought a couple of these boards (not the one pictured)to ease building. Check pictures carefully. The board I got had a lot of surface mount components making it hard to work with.

I think the one I referred to is all through-hole components, there is surface mount stuff on the EGS002 Daughter board but that is already assembled.

There are only 10 types of people in the world: those who understand binary, and those who don't.

hotwater
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Joined: 29/08/2017
Location: United States
Posts: 120

Posted: 07:40am 21 Nov 2017

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EGP1000W board has a mix of both and was the cheapest sine board. Other than that I prefer the layout having FET on just one side and being able to use either TO-220 or . 247. It can be worked around.

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 02:36am 24 Dec 2017

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Hi still around and still interested.

I was wondering if anyone has a spare board that Oztules designed that the EGS002 plugs into that they would sell?

Merry Christmas

Ralph2k6

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Joined: 24/09/2017
Location: Australia
Posts: 129

Posted: 08:11am 25 Dec 2017

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Hey Dazza123, you could try pm clockman. Although in France, he developed and sells the board sets on his site, otherwise maybe someone else here has extras to on sell?

Ralph

Madness

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Joined: 08/10/2011
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Posts: 2498

Posted: 08:41am 25 Dec 2017

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Clockman won't have that board as Oztules moved away from that design a long time ago. I have one I made but it is DIY PCB if you want to cover the cost of parts and post.

There are only 10 types of people in the world: those who understand binary, and those who don't.

Ralph2k6

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Joined: 24/09/2017
Location: Australia
Posts: 129

Posted: 10:32am 25 Dec 2017

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Ah, my bad, thought Dazza was referring to the type that takes the little egs chip itself, the OZcontrol board perhaps.

Did u get tonight's storm Madness? I'm just outside of Yatala, got some good rain here. - sorry off topic

Edited by Ralph2k6 2017-12-26

Ralph

Madness

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Posted: 12:16pm 25 Dec 2017

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No storm here yet, just started to sprinkle a little, as usual looks like it is going to go around us.

I think I have a spare of the other boards too, when I first read it I thought the same but read it again and realised what he wants.

There are only 10 types of people in the world: those who understand binary, and those who don't.

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 09:19am 27 Dec 2017

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oh now I am even more confused, I got the EGS002 board and was going by this thread and the board in the OP of thes thread
http://www.thebackshed.com/forum/forum_posts.asp?TID=8220

I understood that is what I was being directed towards at the beginning of this thread.

If thats the one you have spare it just seems easier than messing with vero board as I was going to.

Madness

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Joined: 08/10/2011
Location: Australia
Posts: 2498

Posted: 10:14am 27 Dec 2017

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The board I have is the same as shown 4th post down on this page which is a later version of the one in your link.

There are only 10 types of people in the world: those who understand binary, and those who don't.

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 01:17am 28 Dec 2017

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when I saw those twin boars I wondered what it was about, just figured it was going to drive two sets of fets effectively two drivers on one board.

Will PM you

Madness

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Posts: 2498

Posted: 04:35am 28 Dec 2017

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The twins is just simply 2 boards being etched at the same the same time to be cut later. It is not unusual to etch onto slightly larger board and trim down to size after.

There are only 10 types of people in the world: those who understand binary, and those who don't.

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 05:25am 28 Dec 2017

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should be a PM awaiting you Madness

oztules

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Joined: 26/07/2007
Location: Australia
Posts: 1686

Posted: 06:44am 28 Dec 2017

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Dazza, remember that this unit is for isolated off grid. If you hook it to the house, and there is any chance of even high impedance battery to ground somewhere, it will drop from 240v to about 120v.

To get around this you need an isolated supply to show the VFB a feedback voltage.... even a 12v tranny may work direct into the diode bridge.... you may have to twiddle it a bit then.

It will work just fine then.
It will work as is for an isolated installation ( only active and neutral output... no connecting neutral to ground until you put in a tranny to isolate.

.........oztules

Village idiot...or... just another hack out of his depth

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 07:23am 28 Dec 2017

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Thanks Oz the plan was to chase down a couple of dead GTI and rat them for the toroids and the capacitor bank and fets.

feed from solar apx 60v and mains fed trans/toriod running around 48v to maintain continuous power.

as a start this to feed my shed till happy with it and then look at feeding a few items from the house.

Madness

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Joined: 08/10/2011
Location: Australia
Posts: 2498

Posted: 07:52am 28 Dec 2017

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Gidday Oz, good to see your still around.

There are only 10 types of people in the world: those who understand binary, and those who don't.

oztules

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Joined: 26/07/2007
Location: Australia
Posts: 1686

Posted: 10:33am 28 Dec 2017

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Mad.... been crook for a while...but looking good now.

Dazza, read this link http://www.anotherpower.com/board/index.php?topic=1116.300

It will explain what I am talking about re isolation transformer.

Ask if still not sure.

.......oztules

Village idiot...or... just another hack out of his depth

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 09:16am 09 Jan 2018

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Thanks for the help guys.
Thanks for the board Madness.

Oztules looking at that link you gave that is for the next version of your board and from what I worked out

the resistors circled are what needs to be removed?

The cross is where the transformer low voltage winding now connect and the 240v wingdings go where the large cap is?

Is there any way to fire this board up without a H bridge?

assuming I only want to run between 1.5kw and 2kw with peaks upto 3kw when inductive motors start such as a evap aircon what FETs and how many would be suitable?

in you orignal tests you used a single fet in each leg with a smallish load. I dont remember seeing a circuit for this?

sorry for all the questions that you have most likely responded to multiple times already, The info is spread out in so many threads and piecing it together is not easy.

Madness

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Joined: 08/10/2011
Location: Australia
Posts: 2498

Posted: 11:01am 09 Jan 2018

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I did not realize you were wanting to build a full inverter.

I have boards that take 12 HY4008's but you could reduce that to 8. Your mods above are correct and the 12 fet board will work with the control board however why not just use the latest version of the control board?

There are only 10 types of people in the world: those who understand binary, and those who don't.

Dazza123
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Joined: 03/11/2017
Location: Australia
Posts: 34

Posted: 04:27am 10 Jan 2018

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Madness said I did not realize you were wanting to build a full inverter.

Hmmm I seem to have confused myself along the way with reading so many different pages and so many different Ideas.

I got it in my head that using the original ozboard and going 48v was the way to go.

my thought was to use warpspeeds idea but at a lower voltage was the way forward.

My thoughts were to series parallel up my 4 30v 8amp panels to give me 60v 16amps and then rewinding a suitable salvaged GTI toriod to give 48v rectify as the back up for night time.

Just looking at seeing this run on the bench at much reduced currents to start with.

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