C
[email protected]
- Jan 1, 1970
- 0
First of all hey to everyone who reads this group, hope your well.
Anyways, in my latest project I am hooking up 2 OSMC's (open source
motor controllers, www.robotpower.com) to 4 wheelchair motors to power
a small chair around.
1st set of Questions, regarding the batteries:
I have 2 24 volt UPS batteries (which are actually 2 12 volt 17 AH
Lead Acid batteries in series) that I would like to use.
I have read that with NiMH batteries, they need to be connected to
bridge rectifiers ala http://www.tlb.org/scooter_battery_schematic.html
to prevent current flowing into eachother.
Is this also required for Lead Acid batteries?
I eventually plan to drop some serious dinero's for Lithium Polymer
batteries, do those require the rectifier in parrallelling
applications?
Finally for batteries, does anyone know of a link for a robust 24 volt
battery charger schematic? Unbolting the batteries from eachother is
tiresome, and I would prefer to be able to hook the entire battery
network up a charger and not have to worry about it.
2nd set of Questions, regarding the capacitors:
I recently found 7 25V 30,000uF electrolytic capacitors at a local
surplus store, which I must admit just scare the bejeezus out of me.
Now according to the manufacturer of the UPS that the batteries were
ripped out of, the batteries have a nominal charging voltage of 27.6
or 28 volts or something in that area. If I connect these fully
charged batteries to the circuit, will the caps be damaged by the over
voltage?
How many of them should I use? the motors are 3 amps no load, and 8
amps full load, so in absolute worse case scenario there would be 32
amps drawn from the caps. is 210,000 uF overkill?
When I put the battery in the circuit, the first thing it does is
charge the caps. It occurs to me that if I charged up the caps as
well, it would give my application that much extra longevity between
charges.
I have charged little caps before, but since these are like big white
scary hand grenades I would just like a little brush up so they dont
burst into flames/explode whatever. So essentially what is the best
way to charge 7 x 30,000 uF caps up to 24 volts?
Thats all I can think of for now, if anyone wants to go ahead and
reply, that would be absolutely great, and much appreciated. And if
anyone has any resources about building electric vehicles with
wheelchair motors link would also be appreciated.
Anyways, in my latest project I am hooking up 2 OSMC's (open source
motor controllers, www.robotpower.com) to 4 wheelchair motors to power
a small chair around.
1st set of Questions, regarding the batteries:
I have 2 24 volt UPS batteries (which are actually 2 12 volt 17 AH
Lead Acid batteries in series) that I would like to use.
I have read that with NiMH batteries, they need to be connected to
bridge rectifiers ala http://www.tlb.org/scooter_battery_schematic.html
to prevent current flowing into eachother.
Is this also required for Lead Acid batteries?
I eventually plan to drop some serious dinero's for Lithium Polymer
batteries, do those require the rectifier in parrallelling
applications?
Finally for batteries, does anyone know of a link for a robust 24 volt
battery charger schematic? Unbolting the batteries from eachother is
tiresome, and I would prefer to be able to hook the entire battery
network up a charger and not have to worry about it.
2nd set of Questions, regarding the capacitors:
I recently found 7 25V 30,000uF electrolytic capacitors at a local
surplus store, which I must admit just scare the bejeezus out of me.
Now according to the manufacturer of the UPS that the batteries were
ripped out of, the batteries have a nominal charging voltage of 27.6
or 28 volts or something in that area. If I connect these fully
charged batteries to the circuit, will the caps be damaged by the over
voltage?
How many of them should I use? the motors are 3 amps no load, and 8
amps full load, so in absolute worse case scenario there would be 32
amps drawn from the caps. is 210,000 uF overkill?
When I put the battery in the circuit, the first thing it does is
charge the caps. It occurs to me that if I charged up the caps as
well, it would give my application that much extra longevity between
charges.
I have charged little caps before, but since these are like big white
scary hand grenades I would just like a little brush up so they dont
burst into flames/explode whatever. So essentially what is the best
way to charge 7 x 30,000 uF caps up to 24 volts?
Thats all I can think of for now, if anyone wants to go ahead and
reply, that would be absolutely great, and much appreciated. And if
anyone has any resources about building electric vehicles with
wheelchair motors link would also be appreciated.