The setup is quite straightforward. I am running two step up (12 - 24volt) dc to dc chargers, but have decided I want to run my motors at 48volt instead of the originally planned 24v. So I'm a bit stuck unless I can figure out a way to charge the 48volt bank with the two 24volt chargers I have.
I need to continue charging while actually using the motors, so I cannot do the obvious (switch/disconnect) method.
Appreciate your help.
2006-10-29 10:28:12 · 8 answers · asked by eLearn-Uni 1 in Cars & Transportation ➔ Boats & Boating
This can be achieved by using Diodes it may get a little expensive.... but the 2 circuits have to be isolated with some type of diode this will be determined by the amperage drawn ...I probably would be cheaper to get a 48 Volt charger and do them all at once.. are you planning to run a boat and have a separate engine to do your charging so you can keep the boat running..an alternator is capable of putting out up to 120V at 1500 RPM.. they used to sell kits basically they disconnected the voltage regulator.. so this can be regulated to 48v instead of 12V or 120V the place to ask is Stellar Generator In Pittsburgh Pa. their on West Liberty Ave. 412-563-2100 I hope this helps you...Good Luck
2006-10-30 02:11:56 · answer #1 · answered by frank26694 3 · 0⤊ 0⤋
It would help to know the size of the boat, is it a model or a genuine 40 footer, why would you need to run the motors when it is on charge, Quite what you hope to achieve by going to 48 volts I cannot even guess at, hopefully you re not just going to put 48 volts through a 24 volt motor, the least ypu can hope for is to demagnetise it if not fry the windings. Your step up chargers must be DC-AC-DC as step up transformers can only be AC, so if you are charging from two seperate batteries through step up chargers there should be no problem charging two halves of the 48 volt bank simultaneously, even when under load, That is if this is a model and you are charging from two seperate sources, If there is mains involved I cannot see how the nescessary seperation can be achieved.
2006-10-29 19:50:59 · answer #2 · answered by "Call me Dave" 5 · 0⤊ 0⤋
It sounds like you want to connect 2 24v charges in series ?
No, the current limiters in both charges would start to hunt and occilate.
After that its a bit undetermined but I'm guessing they would occilate themselves to overheat.
Certainly there would be no over-current/voltage protecting so running them continously to charge at 48V would not be an option, if they charged at all, you'd have to disconnect once the bateries were charged up.
You'd be better making a new charger from scratch.
2006-10-30 08:03:47 · answer #3 · answered by Michael H 7 · 0⤊ 0⤋
If your batteries are 4 x 12v and wired in parralell to produce 48v then you can wire 24V to the first two in the series and then the second two. To make sure it is done right, just check the voltage accross the terminals you wish to connect the charger to, this should read 24v on your voltmeter.
2006-10-29 18:39:37 · answer #4 · answered by Wet One 1 · 0⤊ 0⤋
if it is a motor that has been wound to be 24 volts then you don't have anything to worry about because when you run them at 48 volts they won't be lasting long enough to need a recharge anyway - problem solved (p.s. - a volt meter is only 10 dollars from home depot or lowes)
2006-10-29 18:33:35 · answer #5 · answered by hell oh 4 · 1⤊ 0⤋
why cant you use a 48 volt charger To use 2-24 you need to put diodes in curcuit
2006-10-30 14:17:56 · answer #6 · answered by rocky 3 · 0⤊ 0⤋
I have never tried it but can you hook the two chargers in series, like hooking batteries in series, positive to negative ?? I don't know how that would affect a charger, seems like they would act the same as two batteries in series ??
Just a thought
2006-10-29 18:43:29 · answer #7 · answered by tronary 7 · 0⤊ 2⤋
If the outputs are floating its ok
If not, u will get a bit of sparking.
If in doubt, fuse it.
2006-10-29 18:34:38 · answer #8 · answered by Anonymous · 1⤊ 0⤋