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 12/120V inverter again
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khaled125
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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
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khaled125
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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.
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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...
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khaled125
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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
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khaled125
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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.
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khaled125
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18 Posts

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

Posted - Oct 09 2007 :  6:31:05 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
ok thank u ..but what will be the result if i use it with this circuit plz

Download Attachment: ckt30_1.gif
8.77 KB
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Oct 09 2007 :  11:25:31 PM  Show Profile  Reply with Quote
You found the schematic of an inverter from a Japanese guy.
Then why don't you read the entire project including his test of it?
http://hobby_elec.piclist.com/e_ckt30.htm

Its output voltage is 10% high without a load and is 10% low with a load of only 140W.
Then your 220V will be 242V without a load and will be 198V with a 140W load. Pretty bad voltage regulation.

Download Attachment: Japanese inverter.PNG
7.23 KB

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khaled125
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18 Posts

Posted - Oct 09 2007 :  11:41:38 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
thanks a lot...but what should i do now change the transformer or what
thank u in advance
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Oct 10 2007 :  10:46:06 AM  Show Profile  Reply with Quote
Use a more powerful center-tapped transformer with only two more powerful Mosfets.
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khaled125
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18 Posts

Posted - Oct 10 2007 :  1:02:26 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
thanks for ur advice
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khaled125
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18 Posts

Posted - Oct 10 2007 :  4:56:23 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
Can we use a circuit before the battery in order 2 charge through the voltage 220V in other words inverting circuit from 220 to 12 V, and ofcourse with a suitable Amps??
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Oct 10 2007 :  5:33:42 PM  Show Profile  Reply with Quote
You can use the transformer from an inverter in a battery charger if you disconnect most of the inverter's circuit from the transformer.
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khaled125
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18 Posts

Posted - Oct 10 2007 :  6:01:38 PM  Show Profile  Send khaled125 a Yahoo! Message  Reply with Quote
Thank u for answering me here in our country there is an inverter sold at about 200$ it is made locally the input is 12V and the output is 220V and 700 watt.can u guess the specifications of the transformer of it plz? thanks once more.
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