R
RamRod Sword of Baal
- Jan 1, 1970
- 0
I have a particular set up for powering my computers. We are on mains power
(Australia 240 volts 50 cycles) but I have a system for running the
computers, it has 4 x 6 volt T105 batteries (24 volt ) and a 2500 watt
inverter.
There are as many as 9 computers can be put on line, but in actual fact
normally it would only be 2 or possibly 3, depending what is happening in
the house. I cannot see where we would ever have as many as 5 running at one
time.
The system allows for running a TV and fridge in case of a power failure.
The power for the batteries comes from a simple 40 amp 24 volt charger, it
is a transformer and rectifier. It is a solidly built unit that I had made
for the job.
I also had a 25 amp electronic charger but it has failed and needs repair or
replacement.
These large chargers are quite expensive here in Australia, for instance a
24 volt 25 amp charger can run up above $1000.00.
The inverter is a sinewave job and cost $2500.00 so any idea of throwing
away what I have and replacing it is not on.
Now comes the problem. The battery charger being only a simple battery
charger need the battery voltage to drop quite a bit before you can get a
large current out of it. I want to maintain around 27 volts in the batteries
and have the charger put in what ever the inverter is dragging out, so if
the inverter is using say 20 amps, I need to put in 20 amps, plus a small
maintenace charge for the batteries and maintain the 27 volts in the
batteries, so I am not constantly draining and recharging the batteries thus
reducing their life.
I have seen one of these devices in the past, but unfortunately lost the
link.
It is an electronic 'box of tricks' rated around 40 amps that you can put is
a DC voltage and get out a constant dc voltage.
As I can increase the DC voltage from my current simple battery charger to
up over 40 volts if I so desire, I am looking at buying something that would
give me a constant or near constant 27 volts, and rated at 40 amps output to
maintain the batteries at full charge. Of course the 'box of tricks' needs
to modulate the current to maintain the 27 volts in the system between 0 and
40 amps
I understand it might not be able to hold it at exactly 27 volts, but it
would want it to be somewhere near that number.
At the moment I seem to be having the problem of either pulling power out of
the batteries or over charging them, depending on what setting I use on the
battery charger.
Has anyone seen such a thing (DC Voltage stabilizer), and knows where I can
get one, or has a circuit diagram for something like this?
I have not been able to find anything using Google.
(Australia 240 volts 50 cycles) but I have a system for running the
computers, it has 4 x 6 volt T105 batteries (24 volt ) and a 2500 watt
inverter.
There are as many as 9 computers can be put on line, but in actual fact
normally it would only be 2 or possibly 3, depending what is happening in
the house. I cannot see where we would ever have as many as 5 running at one
time.
The system allows for running a TV and fridge in case of a power failure.
The power for the batteries comes from a simple 40 amp 24 volt charger, it
is a transformer and rectifier. It is a solidly built unit that I had made
for the job.
I also had a 25 amp electronic charger but it has failed and needs repair or
replacement.
These large chargers are quite expensive here in Australia, for instance a
24 volt 25 amp charger can run up above $1000.00.
The inverter is a sinewave job and cost $2500.00 so any idea of throwing
away what I have and replacing it is not on.
Now comes the problem. The battery charger being only a simple battery
charger need the battery voltage to drop quite a bit before you can get a
large current out of it. I want to maintain around 27 volts in the batteries
and have the charger put in what ever the inverter is dragging out, so if
the inverter is using say 20 amps, I need to put in 20 amps, plus a small
maintenace charge for the batteries and maintain the 27 volts in the
batteries, so I am not constantly draining and recharging the batteries thus
reducing their life.
I have seen one of these devices in the past, but unfortunately lost the
link.
It is an electronic 'box of tricks' rated around 40 amps that you can put is
a DC voltage and get out a constant dc voltage.
As I can increase the DC voltage from my current simple battery charger to
up over 40 volts if I so desire, I am looking at buying something that would
give me a constant or near constant 27 volts, and rated at 40 amps output to
maintain the batteries at full charge. Of course the 'box of tricks' needs
to modulate the current to maintain the 27 volts in the system between 0 and
40 amps
I understand it might not be able to hold it at exactly 27 volts, but it
would want it to be somewhere near that number.
At the moment I seem to be having the problem of either pulling power out of
the batteries or over charging them, depending on what setting I use on the
battery charger.
Has anyone seen such a thing (DC Voltage stabilizer), and knows where I can
get one, or has a circuit diagram for something like this?
I have not been able to find anything using Google.