Another INVERTER we can talk about..

[audioguru2]

Hi Alun,
Source resistors might not even be required since Mosfets are PTC. If the stongest one heats, its current decreases. Besides, the SG3525 has an adjustable deadtime contol so the outputs won't conduct simultaneously. 

The current in an inductor builds slowly, so would cause a strange waveform. 

 

[CheeseE]

So if I use 0.1 Ohm resistors, then I need 4*10=40resistors?
Can anybody send me the schematic with sg3525? I can't see it :'( :'(
THX!

 

[Alun]

Have a look here for the SG3526 schematic.
http://www.electronics-lab.com/forum/index.php?topic=1360.14

Resistors aren't expensive, but I agree the board space could be a problem, you might be able to omit the resistors anyway as audioguru said.

What about your PC's monitor, are you sure it will work correctly when powered form this inverter?

 

[CheeseE]

But it uses a different mosfets :/
I can't buy them here...or can I use with irfz44?

I don't know if the monitor will work....I will try it  ;D ;D
And if its not work, I will buy another... ;D

 

[blitznet]

Hi Sasi,
your inverter isn't so good. I always get my IRFZ44 overhead and I lost them.
Does anyone have an experience like me?

 

[Kasamiko]

What's the used of 0.01/5 watts resistors anyway? ???
Can't we just SHORT IT OUT??

rhonn 

 

[CheeseE]

I photograph is missing:///
Can U post it once again?

 

[audioguru2]

Instead of using a half-dozen older Mosfets, why not use a modern one like the IRF2805 which is rated at 330W, and get 1KW from an inverter using only a single pair of them? ???

They are probably used in the $40.00 500W inverters that I can buy at my local tire store.  ;D

 

[CheeseE]

What about IRF1405? I can only buy that here  :'(
55V
169A
330W
Rdson=0.00553 O
TO220 AB

 

[audioguru2]

Hi CheeseE,
[move]Perfect!

 

[audioguru2]

Hey Sasi,
The 1kW inverter will look like your little one when it uses a pair of those modern 330W Mosfets.  ;D

 

[Alun]

I think the transformer would be just a little bit bigger though. ;D

 

[CheeseE]

Hi guys!
I found some inverters...but only PCB...they are great!!!!)
Take a look herethey are made with Protel)

Pspsps2.zip

 

[Kasamiko]

@Sasi
That look's Great!! ;D
BTW: What's the rating of trafo you're using? the one in the picture..

rhonn 

 

[Kasamiko]

And this is the smallest inverter I have ever made....120VA used by my brother in his CAR.

ITS very cute

 

[Kasamiko]

How many amperes?
I'm planning to make a transformer using antenna ferite core..

rhonn 

 

[audioguru2]

Hi Rhonn,
Ferrite is used only for high frequency transformers, isn't it?

 

[Alun]

Yes audioguru I wouldn't even consider ferrite for frequencies under 5KHz.

 

[Kasamiko]

Hi Rhonn,
Ferrite is used only for high frequency transformers, isn't it?

You are right John..at 85kHz on this circuit. I'm planning to install it directly inside a 14" colored tv..

 

[Alun]

Are you sure your TV will be alright running of 370VDC?