Power regulation on 24V system
May 27, 2010
I need some ideas for deriving power for the electronics and servos on Yard Gnome. YD has a single large 24V motor that is powered by two 12V batteries in series.
- Power the electronics and servos from a separate LIPO or other battery; (Disadvantage: extra batteries, more weight, separate charging, etc.)
- Use power regulation from one of the two 12V batteries; (Disadvantage: existing charging system for 24V may not like unequally discharaged batteries, unequal long-term wear on the two batteries)
- User power regulation from the existing 24V rail; (Disadvantage: Need to step down from 24V to 5-6V with resulting power loss)
- Use the power from the existing on-board controller (originally from a mobility chair); (Disadvantage: I don't know how much current it can supply and might overdraw on it; Danger of damaging the controller, which I cannot easily replace)
Any thoughts on the best way? Othe ideas?
I do have one other idea, which is to connect the two 12V batteries in parallel, keeping them isolated via large power diodes so that I'm not shorting the mid-point between the batteries with ground. I have no idea if this would work. The advantage would be that I get even power draw from the batteries as in idea 3 above while only having to step down from 12V as in idea 2 above.