The caps and inductor will only help smooth out your voltage. They wonÃ¢â‚¬â„¢t increase it. Your batteries, are the ones not holding up under load. You need to increase the cell count or parallel more packs and be sure you are using heavy enough wire gauge so that you don't get losses from the wire. Chart on wire sizes, just follow "maximum amps for chassis wiring"
jk1 wrote:kfong what inductor are you using to stop the spikes that you will sell for $10 is it off the shelf or hand made ?
What gauge wire are you using i.e what current does it handle. dewalts packs are rated to 15 amps output or 25 ? what gauge suits that?
The inductors i made in the past used 14 gauge enamel coated magent wire that i managed to turn 29 turns around a 38 mm od ferrite toroid.
i need to make some more inductors as i am making more packs and and wondering if i went over kill on the 14 gauge wire for each 36v dewalt pack. what wire diamter are you using ?
As the for the spikes i dont have any at all so it works, but i would prefer a slightly higher inductor value becuase my packs i am actuly using them at the 26v setting and not full duty cycle 34 volts. i can see on my osciciscolpe that the volatga is not flat and spikes up and down under load from 26 to 34. Packs do not cut out though and work perfectly fine its just what i see on the osciscope that i feel is a problem ? to fix it last time i placed 1000uF caps across the output, this has worked well to smooth it out, now the only problem is voltage stays around 34v no load and 26 under load ( some of it is due to sag and some of it is due the caps keeping the voltage high). which is ok except that the motor is rated to 24 volts so i would prefer the volatge was alwasy 26v with or without load.
So im thinking i may use smaller gauge wire and try and put more turns onto it then remove the capacitors on each 36v battery.