We can't see your link because we don't have a username and PW. If you read through some of this topic you'll find all the info you need for your prject.
3000W is way too much for an inverter. If you use only 12V then its battery current will be 300A! You would need to have a large room full of batteries to power it for a short time. Then it will take 1 week the charge the batteries. Its wiring must be huge and it would need 48 output transistors and many driver transistors. Its transformer would cost a fortune.
It's me again, this time i want to build inverter 12 volt to 120 volt, but i can't find HEP 154 silicon dioda in my country, can i change with another diode, what tipe diode can i use for this circuit. http://www.aaroncake.net/circuits/inverter.asp
This inverter circuit is too simple to work properly. Its output might be only 25W. Its capacitors are backwards which causes them to explode. Its transistors don't have nearly enough base current and are constantly having reverse breakdown. Read about it in this long thread.
Hi I'm sugeng I have some question and i hope some of you can help me to solve my problem, I want to make inverter that can change 12VDC to 220VAC, please send me the diagram and tge component list. I also want to make an automatic battery charger for 12V battrey but my source is from solar cell please send me the diagram and the component list. Thank you, my email is mulyadi_sugeng@yahoo.co.id I hope i can have the diagram and the component list soon.
Hi I'm sugeng I have some question and i hope some of you can help me to solve my problem, I want to make inverter that can change 12VDC to 220VAC, please send me the diagram and tge component list.
This has been answered several times before in this thread. Just use the appropriate transformer.
One Question to AudioGuru.. Is there any advantage of using 2N3055 instead of Mosfet's like IRF540 directly tied to CD 4047. We dont even need the OP-amps since Mosfet requires only less Drive current. Probably the only other change required is in the Transformer side (9-0-9 instead of 12-0-12). I thought the efficiancy of Mosfet is much higher than Transistor since leakage current is less. Not sure whether i am wrong.
One Question to AudioGuru.. Is there any advantage of using 2N3055 instead of Mosfet's like IRF540 directly tied to CD 4047. We dont even need the OP-amps since Mosfet requires only less Drive current. Probably the only other change required is in the Transformer side (9-0-9 instead of 12-0-12). I thought the efficiancy of Mosfet is much higher than Transistor since leakage current is less. Not sure whether i am wrong.
2N3055 transistors were used in the 100W and 500W inverter because the circuit is very old and 2N3055 transistors atre available in countries that don't have Mosfets. Mosfets are much better.
The IRF540 Mosfet is also getting pretty old since much better Mosfets are available now.
The CD4047 can directly drive two Mosfets in an inverter and the output power depends on their current rating and the size of the heatsink. Cheap Chinese inverters use Mosfets.
Efficiency is determined by how much power is wasted as heat in the transistors when they conduct, not leakage current. A 2N3055 transistor has a max saturation voltage of 3V at a collector current of 10A and a huge base current of 3.3A. That is 35W of heat for a 100W inverter. An IRF540 Mosfet has a max saturation voltage of 0.44V at 10A so wastes only 4.4W in a 100W inverter. Better Mosfets would operate cooler and therefore the efficiency would be higher.
If you use a 9-0-9 transformer with Mosfets then with a fully charged battery at 13.8v the output voltage will be 170VAC instead of 115VAC or will be 341VAC instead of 230VAC.
If you use a 12-0-12 transformer with Mosfets and a fully charged battery then the output will be 128VAC instead of 115VAC and will be 256VAC instead of 230VAC.
Thank you Audioguru for your time.. This is lot of good information. Can you please tell me a better Mosfet for such application ? I thought there was a 3 V (Drain source)drop when using Mosfet (IRF 540).. So the battery voltage for 13.8 should be taken as 10.8 when doing calculation using Mosfet. Also if we use a ordinary 12-0-12 or 9-0-9 mains transformer,the losses associated also will be high since Primary and secondary is now in the reverse order. Please clarify.
12/120V inverter again
Posted - Apr 25 2007 : 03:15:45 AM
100W inverter.GIF