switching inverters - Page 1
Forum section: electronics / beginners

author: akash
author_rank: Newbie
timestamp: July 08, 2012, 05:30:18 am
content: hey guys recently joined here and seem to like itI wan to build a switching inverter for my project .can anyone help me on this by providing me the circuit..Input - 12/24v DCOutput- 220v AC,50Hz..1000w o/p.Thank you guys

author: Simon
author_rank: Unknown
timestamp: July 08, 2012, 06:26:17 am
content: No they can't ! I suggest you go pay someone if you just want someone to do it for you.We are all here for fun and we like a bit more involvement than being treated as a collective human encyclopedia. Your project is quite a testing one for a beginner and potentially dangerous if you are not careful of what you are doing. For what these units cost you should buy a commercial product if you need such a device. If this is a project for learning - don't ! it is not a beginner project. Find yourself simpler and less lethal.

author: Psi
author_rank: Super Contributor
timestamp: July 08, 2012, 06:38:21 am
content: 1kW output isn't simple, taking into account efficiency losses you're talking about 100+Amps at 12VThere will be lots of exploding mosfets until the best switching setup/layout is found.It's probably as far from a beginner project as you can ever get.

author: SeanB
author_rank: Super Contributor
timestamp: July 08, 2012, 07:00:10 am
content: Even the OHL ones that are supposedly pro designed and are selling hundreds of units are pretty much an explosion in progress, most do not deliver the rated output for more than a few minutes before they go bang.

author: akash
author_rank: Newbie
timestamp: July 08, 2012, 07:46:33 am
content: I am not treating you like human encyclopedia and just collecting data .I did read much about it.To be brief1.you first boost the dc voltage upto 320v from 12v/24v dc.2.then convert it to ac so that you get 220v rms ac.I dont know how to build build each section but I do have a general idea and I want to run a simulation before trying out one.

author: Bored@Work
author_rank: Super Contributor
timestamp: July 08, 2012, 08:07:26 am
content: Quote from: akash on July 08, 2012, 07:46:33 amYou haven't understood or refuse to understood the previous answers. Let me try:- It is dangerous.- It is very dangerous for a beginner.- If you need to ask how to do it, you should not do it, because you are in the "very dangerous" segment.- It is difficult.- It is difficult to the point that a beginner can't do it.- A few postings in a forum can't explain all you need.- And no one in a forum is going to write you the book of knowledge you need.- A little bit of googling and reading a few web pages don't count, and can't give you the knowledge you need.- A working simulation doesn't mean it is working in practice.- A not-working simulation doesn't mean it is not working in practice.- Parts don't explode in simulations, they do in the real world.- Simulations are not dangerous, the real circuit is.So really, go back to your Arduino and blink a LED.

author: akash
author_rank: Newbie
timestamp: July 08, 2012, 08:19:06 am
content: Thanks for your advice sir but can I atleast build a 100w one for the sake of experience .

author: Simon
author_rank: Unknown
timestamp: July 08, 2012, 08:32:17 am
content: Quote from: akash on July 08, 2012, 08:19:06 amNo, no, no. You still don't understand. Unless you are experienced dont touch anything over 24 volts. Mains voltages are to be considered with religios respect !

author: digsys
author_rank: Unknown
timestamp: July 08, 2012, 09:06:26 am
content: As others have said - this is NOT an area for experimenters. But since you seem determined, your BEST and SAFEST path is -Work on a 12/24 to 60VAC inverter. Dig through IC applications designs from Maxim, TI, LT and study how they work.Then either put together a suggested applications prototype and examine how it works or make a cut-down version tostudy the principles. You may? get a boot from 60VAC, but at LEAST it won't kill you instantly. PLUS you'll understand 95%of what's needed, especially reforming the AC curve. If you do, come back here and let us know BEFORE you continue to 220VAC !!!

author: Zero999
author_rank: Super Contributor
timestamp: July 08, 2012, 09:41:47 am
content: 60VAC? I'd recommend 24VAC. You need to boost to 35V and convert to 24VAC and you can play around with isolating it from the 24VDC circuit. It's safer and 24VAC is a standard industrial voltage so it may even be useful.

author: G7PSK
author_rank: Super Contributor
timestamp: July 08, 2012, 10:00:49 am
content: Even with units made by manufactures like Trace, you will get the odd exploding mosfet Which is why I have about 20 left over from the last one I repaired, You need to replace all of them at the same time when one blows and there is 80 of them to do.

author: Simon
author_rank: Unknown
timestamp: July 08, 2012, 11:31:44 am
content: just remember that 50V is enough to kill

author: akash
author_rank: Newbie
timestamp: July 08, 2012, 11:49:03 am
content: Thanks guys for all your help and support.I am studying engineering but what is the use only to study theory.I get the urge to test the theory myself and i will try to study more about them and try to build a small one .thank you guys.

author: Simon
author_rank: Unknown
timestamp: July 08, 2012, 01:06:36 pm
content: What have you built so far ? what sort of engineering are you studying ?

author: amyk
author_rank: Super Contributor
timestamp: July 08, 2012, 01:07:49 pm
content: http://ludens.cl/Electron/chinverter/chinverter.html^ Here's how NOT to design one.