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 12/120V inverter again
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pebe
Nobel Prize Winner

United Kingdom
1078 Posts

Posted - Feb 13 2010 :  10:55:38 AM  Show Profile  Reply with Quote
I agree.
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wasssup1990
Nobel Prize Winner

A Land Down Under
2261 Posts

Posted - Feb 13 2010 :  8:17:53 PM  Show Profile  Visit wasssup1990's Homepage  Reply with Quote
Aaron... Do it.

When one person suffers from a delusion it is called insanity.
When many people suffer from a delusion it is called religion.
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weqwedas
Apprentece

8 Posts

Posted - Feb 15 2010 :  12:13:09 AM  Show Profile  Reply with Quote
If you can, edit the first post to say that the schematic that links to this thread is very faulty.

Edited by - weqwedas on Feb 15 2010 12:13:58 AM
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smeezekitty
New Member

USA
1 Posts

Posted - Apr 08 2010 :  9:52:06 PM  Show Profile  Visit smeezekitty's Homepage  Reply with Quote
Is it me or are the caps backwards on the diagram O_o.
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Cokaric
New Member

4 Posts

Posted - Apr 11 2010 :  10:19:08 AM  Show Profile  Reply with Quote
Well last time I contacted u was about 4 months ago, in the meantime I examen many circuits but I stick with urs... well PCB is finish now, but I need to ask u few q before I start building it...

#1
Could u check my design ?

#2
Is it possible to modify it for higher power, like 750 W, 850 W or 950 W?

#3
With 500W and 45 Ah battery and consumption of 2,18 Ah in theory it can provide electricity for 20,64 h but I am sure that I would feel effects after only 8h. Is this correct ?

#4
What should be boards copper thickness ?

#5
How wide should lines be, 4 mm ?

Best regards,
Cokaric

The more I C, the less I see

Edited by - Cokaric on Apr 11 2010 10:21:08 AM
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Apr 11 2010 :  1:13:49 PM  Show Profile  Reply with Quote
quote:
Originally posted by Cokaric
Well last time I contacted u was about 4 months ago, in the meantime I examen many circuits but I stick with urs... well PCB is finish now, but I need to ask u few q before I start building it...

#1 Could u check my design ?


#2 Is it possible to modify it for higher power, like 750 W, 850 W or 950 W?


You forgot to attach your schematic and parts list so we don't know what you are talking about.

quote:
#3 With 500W and 45 Ah battery and consumption of 2,18 Ah in theory it can provide electricity for 20,64 h but I am sure that I would feel effects after only 8h. Is this correct ?[/quote]

A 500W inverter is about 80% efficient so it draws a max of about 625W from the battery which is a current of 52.1A. If the battery current is only 2.18A then the power output is zero since the inverter has an idling current from the battery of more than 2A.

A 45Ah battery supplies 4.5A for 10 hours or 45A for about 15 minutes. It might overheat and boil if it supplies 45A for more than a few minutes.

Edited by - audioguru on Apr 11 2010 1:20:03 PM
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Cokaric
New Member

4 Posts

Posted - Apr 12 2010 :  06:26:55 AM  Show Profile  Reply with Quote
Sorry, I was talking about ur schematic but it seems I didn't express my thoughts well so u were unable to understand me... sorry again...


Ur Desing >>
Download Attachment: 20097292438_500W inverter final.PNG
86.18 KB




PCB >>
Download PNG PCB: PCB.PNG
31.48 KB
Download PCB: New.zip
9.56 KB



In PCB I used 0,22Ohm 5W resistors to get 0,11Ohm 10W resistors
In the middle is circle that goes to Emiter of 2N3055 Transistor, his collector is cooler where they are all attached, Base is manually connected with wire from one Transistor to other...
IC CD4047 leg one is down left connected to C1 parallel to R1, leg 4,5,6 & 14 goes to R100 and he is connected to 0 on transformer
ICLM358 leg one is down right connected to base of 2SC1061, legs 6&7 are connected to jumper that goes to base of 2SC1061, leg 8 is connected to 0 on transformer
I order 2SC1061 but they sent me simillar one whos legs are Base, Collector in middle, Emiter...
This is basic, I will draw with my hand elements and re upload picture here...
This has been done in program called PCB Artist

Regards,
Cokaric

The more I C, the less I see
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Apr 12 2010 :  08:40:19 AM  Show Profile  Reply with Quote
quote:
Originally posted by Cokaric
#1
Could u check my design ?

What do you want to be checked?
This very simple circuit was designed for 3rd-world contries where modern Mosfets and PWM iCs are not available. It has a crude square-wave output.

quote:
#2
Is it possible to modify it for higher power, like 750 W, 850 W or 950 W?

It is not practical to add more driver and output transistors. A single battery will boil or melt anyway due to the very high current.

quote:
#3
With 500W and 45 Ah battery and consumption of 2,18 Ah in theory it can provide electricity for 20,64 h but I am sure that I would feel effects after only 8h. Is this correct ?

I don't know how many amps it draws from a battery when it has no load.
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Aman2009
New Member

Sudan
1 Posts

Posted - May 06 2010 :  02:42:06 AM  Show Profile  Reply with Quote
How to simulate this circuit diagram in the electronic workbench
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pebe
Nobel Prize Winner

United Kingdom
1078 Posts

Posted - May 06 2010 :  04:00:15 AM  Show Profile  Reply with Quote
I don't know of the simulator 'electronic workbench', but did it not come with a set of instructions or a Helpfile?
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - May 06 2010 :  5:14:04 PM  Show Profile  Reply with Quote
A simulation program will show you that the simple square-wave inverter's output voltage is not regulated and will be too high when the battery is charged and the load current is low and the output voltage is too low when the battery is running down and the load current is high.

The sim program might show its awful square-wave output waveform that will not power modern electronic products because it does not have the same high peak voltage of the mains sine-wave.
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Tinkerboy
New Member

2 Posts

Posted - Jun 26 2010 :  09:22:21 AM  Show Profile  Reply with Quote
I'm trying to build a high-wattage inverter, as well as some type of threshold-relay switch, in order to run my whole house on my 7kw generator, by using its starter-battery to supply the temporary impulse-current responsible for power-requirements above 7kw. If I can make a 10kw or more inverter, as well as a threshold-switch so that it only kicks on above 7kw, then the battery should have enough cranking-amps that there will be no problem supplying the few seconds of impulse-current to get things started (like lights, televisions, microwave etc), since my house rarely requires more than a two steady-state kilowatts at a time, and never more than five. Rather, it's the impulse-current that requires the more heavy-duty 15-20 kw generators to run a whole house. Likewise, the generator already has a function to re-charges the starter-battery.
Do any pro's have any ideas about this? Thanks.
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yashkhaitan
New Member

1 Posts

Posted - Jul 26 2010 :  12:37:44 PM  Show Profile  Reply with Quote
Can someone please tell me what is the quiescent power consumption of this circuit (12VDC to 220VAC)?
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audioguru
Nobel Prize Winner

Canada
4214 Posts

Posted - Jul 26 2010 :  1:44:12 PM  Show Profile  Reply with Quote
quote:
Originally posted by yashkhaitan

Can someone please tell me what is the quiescent power consumption of this circuit (12VDC to 220VAC)?

Which circuit are you talking about?
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vinu673
New Member

India
3 Posts

Posted - Feb 19 2011 :  06:27:12 AM  Show Profile  Reply with Quote
hello ,
Iam planning to make 2000W 240 V (to work with 1600 W normally) inverter driven from 110 V 75 AH battery , can any body help me by sharing some circuits and experience , is there any idea to limit input current TO 15 A?
vinu673
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