Aaron's Homepage Forum
Aaron's Homepage Forum
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
 Password:
Save Password
Forgot your Password?

 All Forums
 Electronics
 Power Supply
 12/120V inverter again		  New Topic  Reply to Topic
 Printer Friendly
Previous Page | Next Page
Author Previous Topic Topic Next Topic
Page: of 63

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Aug 12 2007 :  2:05:23 PM  Show Profile  Reply with Quote
If you feed a sine-wave shaped waveform into power transistors or power Mosfets then they spend plenty of time with a high current and a voltage across them. Then their power dissipation (heating) is the current times the voltage. It will be a tremendous amount of heat to get rid of and it makes a tremendous waste of battery power.

An efficient sine-wave inverter switches the transistors on and off at a high frequency. Then pulse-width-modulation changes the width of the pulses so the average current in the transformer is a sine-wave.
The transistors remain fairly cool because when they have a high current then their voltage is nearly zero and when they have voltage then their current is zero.
Go to Top of Page

newjazzy2005
Apprentece

5 Posts
Posted - Aug 20 2007 :  12:19:59 PM  Show Profile  Reply with Quote
can any one help me with i.c inverter cuicuit schmatic diagram
Go to Top of Page

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Aug 20 2007 :  12:48:22 PM  Show Profile  Reply with Quote
What help do you need? Attach your schematic.
Go to Top of Page

mrgone
Nobel Prize Winner

USA
1176 Posts
Posted - Aug 20 2007 :  5:01:13 PM  Show Profile  Reply with Quote
quote:
Originally posted by newjazzy2005

can any one help me with i.c inverter cuicuit schmatic diagram


Do you mean this one? I posted this in another thread.

Download Attachment: Inverter1.JPG
25.26 KB
Go to Top of Page

kivdenn
Nobel Prize Winner

Uganda
535 Posts
Posted - Sep 27 2007 :  08:16:03 AM  Show Profile  Reply with Quote
What wave form does this one produce?, Does it have a low voltage shutdown? Which pin goes to Vcc and the ground and to which pins are the mosfet chanels connected? SOme capacitor valus are not shown like c3 to c6 Thanks
Dennis
Edited by - kivdenn on Sep 27 2007 08:18:12 AM
Go to Top of Page

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Sep 27 2007 :  10:35:00 AM  Show Profile  Reply with Quote
Its outputs are filtered into almost a sinewave.
It uses an old fashioned TTL logic inverter IC that needs a regulated 5V supply.

It doesn't have low voltage shutdown. Its output voltage isn't high enough to drive Mosfets.

If you try to make a sine-wave inverter using a sine-wave input into a Mosfet amplifier then they will get extremely hot and waste a lot of battery power.
A sine-wave inverter switches its Mosfets completely on and off so they don't get too hot and so they don't waste a lot of battery power. They are switched at a high frequency and pulse-width-modulation is used to make a stepped sine-wave that is filtered into a good sine-wave.
Go to Top of Page

Ruben
New Member

USA
1 Posts
Posted - Oct 01 2007 :  8:07:42 PM  Show Profile  Reply with Quote
quote:
Originally posted by ZETABOY

Any have a plan plans for build an Iverter of 5000 watts. i want build a inverter of 5000watts or more bigger
Go to Top of Page

audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Oct 01 2007 :  9:24:39 PM  Show Profile  Reply with Quote
Where are you going to get 6000W of power to power the 5000W inverter? 8 huge car batteries would last only 1 hour. 32 huge car batteries would last only 5 hours.
The transformer would cost a fortune.
Go to Top of Page

khaled125
Apprentece

18 Posts
Posted - Oct 09 2007 :  3:42:55 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
hello every body..im new 2 electronics.. am going 2 use the transformer with 220V as for primary(input) and 12V as for secondary(output). how much wattage it will produce and is it right to use 12v dc to the input with that transformer?
thanks alot 2 all of u
Go to Top of Page

khaled125
Apprentece

18 Posts
Posted - Oct 09 2007 :  3:45:33 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
i forgot to tell that my transformer is 10A.
Go to Top of Page

Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts
Posted - Oct 09 2007 :  3:48:42 PM  Show Profile  Reply with Quote
You are making an inverter, right? If so you will need to make the 12v as the input and 220V as output.
I need to know how many amps you are feeding in or better, how many amps it is giving out. Remember to work out the wattage is volts times amps

You can't use DC on a transformer, it will be a direct short...
Go to Top of Page

khaled125
Apprentece

18 Posts
Posted - Oct 09 2007 :  4:00:24 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
thank u 4 ur reply..i want 2 explain that the transformer is 0220/012 /10A/150VA/it weighs about 3kiloand 40 grams
Go to Top of Page

khaled125
Apprentece

18 Posts
Posted - Oct 09 2007 :  4:05:47 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
the transformer is center-tapless transformer.
Go to Top of Page

khaled125
Apprentece

18 Posts
Posted - Oct 09 2007 :  4:19:03 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
Go to Top of Page

Binary 1011001101
Nobel Prize Winner

United Kingdom
569 Posts
Posted - Oct 09 2007 :  5:20:25 PM  Show Profile  Reply with Quote
Ok you will need a full bridge to make that into a inverter since it does not have a center-tap...
And for wattage I think it would be about 80-90 watts
Edited by - Binary 1011001101 on Oct 09 2007 5:21:46 PM
Go to Top of Page
Page: of 63 Previous Topic Topic Next Topic  
Previous Page | Next Page
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Aaron's Homepage Forum © 1995-2020 AARONCAKE.NET Go To Top Of Page
This page was generated in 0.16 seconds. Snitz Forums 2000