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Anonymous Poster #1

Automatic Charge/Invert Circuit

01/01/2012 2:44 PM

I have an invertor with a built-in charger.I have to manually switch it to "invert" when the power goes and also manually switch to "charge" when the power comes back. what external circuit can i introduce to make it invert dc to ac automatically when there is a power fail? Also how can i make it charge automatically when the power comes back?
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SolarEagle
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#1

Re: Automatic charge/invert circuit

01/01/2012 2:52 PM

This should work...

http://www.bizoner.com/arduino-6-dof-programmable-clamp-robot-arm-kit-ready-to-use-p-238.html?zenid=b1f27nvise9o2v78i6a9v153r5

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dvmdsc
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#2

Re: Automatic Charge/Invert Circuit

01/01/2012 9:56 PM

It probably will render your "instrument"to a killer. Whatever you might be up to, make sure you have a good transfer switch to isolate it "THEN" from the grid.

A mechanically coupled relay to a transfer switch can do the work.

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Guest1947
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#3

Re: Automatic Charge/Invert Circuit

01/01/2012 11:59 PM

Please buy a standard sine wave inverter.
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zener
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#9
In reply to #3

Re: Automatic Charge/Invert Circuit

01/03/2012 1:54 AM

This inverter of mine powers a TV set,decoder and four 9W powersaver light bulbs.Are you suggesting i should wire these items permanently to the sine wave inverter?
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PWSlack
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#11
In reply to #9

Re: Automatic Charge/Invert Circuit

01/03/2012 8:44 AM

Er, Guest1947 is actually suggesting that the original poster, Anonymous poster #1, does this.

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rakesh_semwal
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#4

Re: Automatic Charge/Invert Circuit

01/02/2012 12:14 AM

Operate a DPDT relay with main power and connect its terminal in following configuration.

Pole 1 Invert switch wires - wire 1 on CO and wire 2 on NC

Pole 2 Charge switch wires - wire 1 on CO and wire 2 on NO

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Haajee
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#5
In reply to #4

Re: Automatic Charge/Invert Circuit

01/02/2012 11:55 AM

GA.

Add a diagram for his clarification.
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brettj1au
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#7
In reply to #4

Re: Automatic Charge/Invert Circuit

01/02/2012 10:50 PM

I was about to sugest the same set up but u beat me to it GA
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Yahlasit
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#14
In reply to #4

Re: Automatic Charge/Invert Circuit

01/03/2012 12:26 PM

The simpler, the better; GA.

But still wander, what kind of inverter is that of the OP, that it doesn't sense and react automatically?

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hbsnyder
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#6

Re: Automatic Charge/Invert Circuit

01/02/2012 11:58 AM

Depending on the power source why not use a UPS to supply the power?
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zener
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#8
In reply to #6

Re: Automatic Charge/Invert Circuit

01/03/2012 1:19 AM

I am not sure if a UPS would be appropriate because this inverter provides power to a TV set, Decoder and four 9W energy saver light bulbs for approx 4hours. Would a UPS provide power for that long?
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SolarEagle
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#10
In reply to #8

Re: Automatic Charge/Invert Circuit

01/03/2012 8:27 AM

No problem....Just have to size it correctly....

http://www.apc.com/products/category.cfm?id=13

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Anonymous Poster #2
#12
In reply to #8

Re: Automatic Charge/Invert Circuit

01/03/2012 8:47 AM

Do you live near Anonymous Poster #1, then?
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zener
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Join Date: Nov 2011
Posts: 31
#15
In reply to #12

Re: Automatic Charge/Invert Circuit

01/04/2012 3:52 AM

sorry, i am Anonymous Poster#1. should have said so right from beginning.
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Haajee
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#13
In reply to #8

Re: Automatic Charge/Invert Circuit

01/03/2012 9:33 AM

Yes. Backup time is not on the power rating but the size of Battery/ battery-bank.

If the charger of the UPS unit cannot recharge fully within the period of available power an additional charger.

Otherwise such units are available on demand for the load specified.

TV set using Picture tubes [almost died out in developed countries] were a problem for invertes & UPSs due to high surge current for De-magnetizing, but latest designs has no such problem and draw much lower current.

In my country we are using one or 2 fans [cieling and padestal] additionally, with Picture-tube TV set for more than 2 hour using locally manufactured UPSs.

Mr. Anonymous is really anonymous so don't know if such units can be available in his country.

And what about your contry?
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zener
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Join Date: Nov 2011
Posts: 31
#16
In reply to #13

Re: Automatic Charge/Invert Circuit

01/04/2012 4:08 AM

Haajee,am not THAT anonymous.Am in Zambia. My battery is a 26AHour and my inverter is 500W max.have an LCD 32" 150W max, and i would want power for at least 4 hours.
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Users who posted comments:

Anonymous Poster (1); brettj1au (1); dvmdsc (1); Guest1947 (1); Haajee (2); hbsnyder (1); PWSlack (1); rakesh_semwal (1); SolarEagle (2); Yahlasit (1); zener (4)

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